Merge pull request #159 from tiqi-group/158-defining-task-without-autostart-fails

fix: defining task without autostart fails

.github/workflows/publish-to-pypi.yaml

@@ -70,9 +70,9 @@ jobs:
         name: python-package-distributions
         path: dist/
     - name: Sign the dists with Sigstore
-      uses: sigstore/gh-action-sigstore-python@v1.2.3
+      uses: sigstore/gh-action-sigstore-python@v3.0.0
       with:
-        inputs: >-
+        inputs: |
           ./dist/*.tar.gz
           ./dist/*.whl
     - name: Upload artifact signatures to GitHub Release
@@ -85,27 +85,3 @@ jobs:
         gh release upload
         '${{ github.ref_name }}' dist/**
         --repo '${{ github.repository }}'
-
-  # publish-to-testpypi:
-  #   name: Publish Python 🐍 distribution 📦 to TestPyPI
-  #   needs:
-  #   - build
-  #   runs-on: ubuntu-latest
-  #
-  #   environment:
-  #     name: testpypi
-  #     url: https://test.pypi.org/p/pydase
-  #
-  #   permissions:
-  #     id-token: write  # IMPORTANT: mandatory for trusted publishing
-  #
-  #   steps:
-  #   - name: Download all the dists
-  #     uses: actions/download-artifact@v3
-  #     with:
-  #       name: python-package-distributions
-  #       path: dist/
-  #   - name: Publish distribution 📦 to TestPyPI
-  #     uses: pypa/gh-action-pypi-publish@release/v1
-  #     with:
-  #       repository-url: https://test.pypi.org/legacy/

.github/workflows/python-package.yml

@@ -16,15 +16,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11"]
+        python-version: ["3.10", "3.11", "3.12"]
 
     steps:
-    - uses: actions/checkout@v3
-    - uses: chartboost/ruff-action@v1
-      with:
-        src: "./src"
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v3
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -32,6 +29,12 @@ jobs:
         python -m pip install --upgrade pip
         python -m pip install poetry
         poetry install --with dev
+    - name: Check with ruff
+      run: |
+        poetry run ruff check src
+    - name: Check formatting with ruff
+      run: |
+        poetry run ruff format --check src
     - name: Test with pytest
       run: |
         poetry run pytest

.vscode/launch.json

@@ -25,7 +25,7 @@
             "type": "firefox",
             "request": "launch",
             "name": "react: firefox",
-            "url": "http://localhost:3000",
+            "url": "http://localhost:5173",
             "webRoot": "${workspaceFolder}/frontend"
         }
     ]

LICENSE

@@ -1,6 +1,4 @@
-MIT License
-
-Copyright (c) 2023 Mose Müller <mosemueller@gmail.com>
+Copyright (c) 2023-2024 Mose Müller <mosemueller@gmail.com>
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -1,62 +1,34 @@
-# pydase (Python Data Service) <!-- omit from toc -->
+<!--introduction-start-->
+# pydase <!-- omit from toc -->
 
-[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
-[![Documentation Status](https://readthedocs.org/projects/pydase/badge/?version=latest)](https://pydase.readthedocs.io/en/latest/?badge=latest)
+[![Version](https://img.shields.io/pypi/v/pydase?style=flat)](https://pypi.org/project/pydase/)
+[![Python Versions](https://img.shields.io/pypi/pyversions/pydase)](https://pypi.org/project/pydase/)
+[![Documentation Status](https://readthedocs.org/projects/pydase/badge/?version=stable)](https://pydase.readthedocs.io/en/stable/)
+[![License: MIT](https://img.shields.io/github/license/tiqi-group/pydase)][License]
 
-`pydase` is a Python library for creating data service servers with integrated web and RPC servers. It's designed to handle the management of data structures, automated tasks, and callbacks, and provides built-in functionality for serving data over different protocols.
+`pydase` is a Python library that simplifies the creation of remote control interfaces for Python objects. It exposes the public attributes of a user-defined class via a [Socket.IO](https://python-socketio.readthedocs.io/en/stable/) web server, ensuring they are always in sync with the service state. You can interact with these attributes using an RPC client, a RESTful API, or a web browser. The web browser frontend is auto-generated, displaying components that correspond to each public attribute of the class for direct interaction.
+`pydase` implements an [observer pattern][Observer Pattern] to provide the real-time updates, ensuring that changes to the class attributes are reflected across all clients.
 
-- [Features](#features)
-- [Installation](#installation)
-- [Usage](#usage)
-  - [Defining a DataService](#defining-a-dataservice)
-  - [Running the Server](#running-the-server)
-  - [Accessing the Web Interface](#accessing-the-web-interface)
-  - [Connecting to the Service via Python Client](#connecting-to-the-service-via-python-client)
-    - [Tab Completion Support](#tab-completion-support)
-    - [Integration within Another Service](#integration-within-another-service)
-- [Understanding the Component System](#understanding-the-component-system)
-  - [Built-in Type and Enum Components](#built-in-type-and-enum-components)
-  - [Method Components](#method-components)
-  - [DataService Instances (Nested Classes)](#dataservice-instances-nested-classes)
-  - [Custom Components (`pydase.components`)](#custom-components-pydasecomponents)
-    - [`DeviceConnection`](#deviceconnection)
-      - [Customizing Connection Logic](#customizing-connection-logic)
-      - [Reconnection Interval](#reconnection-interval)
-    - [`Image`](#image)
-    - [`NumberSlider`](#numberslider)
-    - [`ColouredEnum`](#colouredenum)
-    - [Extending with New Components](#extending-with-new-components)
-- [Understanding Service Persistence](#understanding-service-persistence)
-  - [Controlling Property State Loading with `@load_state`](#controlling-property-state-loading-with-load_state)
-- [Understanding Tasks in pydase](#understanding-tasks-in-pydase)
-- [Understanding Units in pydase](#understanding-units-in-pydase)
-- [Configuring pydase via Environment Variables](#configuring-pydase-via-environment-variables)
-- [Customizing the Web Interface](#customizing-the-web-interface)
-  - [Enhancing the Web Interface Style with Custom CSS](#enhancing-the-web-interface-style-with-custom-css)
-  - [Tailoring Frontend Component Layout](#tailoring-frontend-component-layout)
-  - [Specifying a Custom Frontend Source](#specifying-a-custom-frontend-source)
-- [Logging in pydase](#logging-in-pydase)
-  - [Changing the Log Level](#changing-the-log-level)
-- [Documentation](#documentation)
-- [Contributing](#contributing)
-- [License](#license)
+Whether you're managing lab sensors, network devices, or any abstract data entity, `pydase` facilitates service development and deployment.
 
 ## Features
 
 <!-- no toc -->
-- [Simple data service definition through class-based interface](#defining-a-dataService)
-- [Integrated web interface for interactive access and control of your data service](#accessing-the-web-interface)
-- [Support for programmatic control and interaction with your service](#connecting-to-the-service-via-python-client)
-- [Component system bridging Python backend with frontend visual representation](#understanding-the-component-system)
-- [Customizable styling for the web interface through user-defined CSS](#customizing-web-interface-style)
-- [Saving and restoring the service state for service persistence](#understanding-service-persistence)
-- [Automated task management with built-in start/stop controls and optional autostart](#understanding-tasks-in-pydase)
-- [Support for units](#understanding-units-in-pydase)
-<!-- Support for additional servers for specific use-cases -->
+- [Simple service definition through class-based interface][Defining DataService]
+- [Auto-generated web interface for interactive access and control of your service][Web Interface Access]
+- [Python RPC client][Short RPC Client]
+- [Customizable web interface][Customizing Web Interface]
+- [Saving and restoring the service state][Service Persistence]
+- [Automated task management with built-in start/stop controls and optional autostart][Task Management]
+- [Support for units][Units]
+- [Validating Property Setters][Property Validation]
+
+<!--introduction-end-->
+
+<!--getting-started-start-->
 
 ## Installation
 
-<!--installation-start-->
 
 Install `pydase` using [`poetry`](https://python-poetry.org/):
 
@@ -70,26 +42,27 @@ or `pip`:
 pip install pydase
 ```
 
-<!--installation-end-->
 
 ## Usage
 
-<!--usage-start-->
 
-Using `pydase` involves three main steps: defining a `DataService` subclass, running the server, and then connecting to the service either programmatically using `pydase.Client` or through the web interface.
+Using `pydase` involves three main steps: defining a `pydase.DataService` subclass, running the server, and then connecting to the service either programmatically using `pydase.Client` or through the web interface.
 
 ### Defining a DataService
 
-To use pydase, you'll first need to create a class that inherits from `DataService`. This class represents your custom data service, which will be exposed via a web server. Your class can implement class / instance attributes and synchronous and asynchronous tasks.
+To use `pydase`, you'll first need to create a class that inherits from `pydase.DataService`.
+This class represents your custom service, which will be exposed via a web server.<br>
+Your class can implement synchronous and asynchronous methods, some [built-in types](https://docs.python.org/3/library/stdtypes.html) (like `int`, `float`, `str`, `bool`, `list` or `dict`) and [other components][Custom Components] as attributes.
+For more information, please refer to the [components guide][Components].
 
 Here's an example:
 
 ```python
-from pydase import DataService, Server
+import pydase
 from pydase.utils.decorators import frontend
 
 
-class Device(DataService):
+class Device(pydase.DataService):
     _current = 0.0
     _voltage = 0.0
     _power = False
@@ -132,26 +105,30 @@ class Device(DataService):
 
 if __name__ == "__main__":
     service = Device()
-    Server(service).run()
+    pydase.Server(service=service, web_port=8001).run()
 ```
 
-In the above example, we define a Device class that extends DataService. We define a few properties (current, voltage, power) and their getter and setter methods.
+In the above example, we define a `Device` class that inherits from `pydase.DataService`. 
+We define a few properties (current, voltage, power) and their getter and setter methods.
 
 ### Running the Server
 
-Once your DataService is defined, you can create an instance of it and run the server:
+Once your service class is defined, you can create an instance of it and run the server:
 
 ```python
-from pydase import Server
+import pydase
 
 # ... defining the Device class ...
 
 if __name__ == "__main__":
     service = Device()
-    Server(service).run()
+    pydase.Server(service=service, web_port=8001).run()
 ```
 
-This will start the server, making your Device service accessible via RPC and a web server at [http://localhost:8001](http://localhost:8001).
+This will start the server, making your `Device` service accessible on 
+[http://localhost:8001](http://localhost:8001). The port number for the web server can 
+be customised in the server constructor or through environment variables and defaults 
+to `8001`.
 
 ### Accessing the Web Interface
 
@@ -161,7 +138,7 @@ Once the server is running, you can access the web interface in a browser:
 
 In this interface, you can interact with the properties of your `Device` service.
 
-### Connecting to the Service via Python Client
+### Connecting to the Service via Python RPC Client
 
 You can connect to the service using the `pydase.Client`. Below is an example of how to establish a connection to a service and interact with it:
 
@@ -170,7 +147,8 @@ import pydase
 
 # Replace the hostname and port with the IP address and the port of the machine where 
 # the service is running, respectively
-client_proxy = pydase.Client(hostname="<ip_addr>", port=8001).proxy
+client_proxy = pydase.Client(url="ws://<ip_addr>:<web_port>").proxy
+# client_proxy = pydase.Client(url="wss://your-domain.ch").proxy  # if your service uses ssl-encryption
 
 # After the connection, interact with the service attributes as if they were local
 client_proxy.voltage = 5.0
@@ -182,623 +160,27 @@ The proxy acts as a local representative of the remote service, enabling straigh
 
 The proxy class dynamically synchronizes with the server's exposed attributes. This synchronization allows the proxy to be automatically updated with any attributes or methods that the server exposes, essentially mirroring the server's API. This dynamic updating enables users to interact with the remote service as if they were working with a local object.
 
-#### Tab Completion Support
+The RPC client also supports tab completion support in the interpreter, can be used as a context manager and integrates very well with other pydase services. For more information, please refer to the [documentation][Python RPC Client].
 
-In interactive environments such as Python interpreters and Jupyter notebooks, the proxy class supports tab completion, which allows users to explore available methods and attributes.
+### RESTful API
+The `pydase` RESTful API allows for standard HTTP-based interactions and provides access to various functionalities through specific routes. 
 
-#### Integration within Another Service
-
-You can also integrate a client proxy within another service. Here's how you can set it up:
+For example, you can get a value like this:
 
 ```python
-import pydase
+import json
 
-class MyService(pydase.DataService):
-    # Initialize the client without blocking the constructor
-    proxy = pydase.Client(hostname="<ip_addr>", port=8001, block_until_connected=False).proxy
+import requests
 
-if __name__ == "__main__":
-    service = MyService()
-    # Create a server that exposes this service; adjust the web_port as needed
-    server = pydase.Server(service, web_port=8002). run()
+response = requests.get(
+    "http://<hostname>:<web_port>/api/v1/get_value?access_path=<full_access_path>"
+)
+serialized_value = json.loads(response.text)
 ```
 
-In this setup, the `MyService` class has a `proxy` attribute that connects to a `pydase` service located at `<ip_addr>:8001`.
-The `block_until_connected=False` argument allows the service to start up even if the initial connection attempt fails.
-This configuration is particularly useful in distributed systems where services may start in any order.
+For more information, see [here][RESTful API].
 
-<!--usage-end-->
-
-## Understanding the Component System
-
-<!-- Component User Guide Start -->
-
-In `pydase`, components are fundamental building blocks that bridge the Python backend logic with frontend visual representation and interactions. This system can be understood based on the following categories:
-
-### Built-in Type and Enum Components
-
-`pydase` automatically maps standard Python data types to their corresponding frontend components:
-
-- `str`: Translated into a `StringComponent` on the frontend.
-- `int` and `float`: Manifested as the `NumberComponent`.
-- `bool`: Rendered as a `ButtonComponent`.
-- `list`: Each item displayed individually, named after the list attribute and its index.
-- `dict`: Each key-value pair displayed individually, named after the dictionary attribute and its key. **Note** that the dictionary keys must be strings.
-- `enum.Enum`: Presented as an `EnumComponent`, facilitating dropdown selection.
-
-### Method Components
-Within the `DataService` class of `pydase`, only methods devoid of arguments can be represented in the frontend, classified into two distinct categories
-
-1. [**Tasks**](#understanding-tasks-in-pydase): Argument-free asynchronous functions, identified within `pydase` as tasks, are inherently designed for frontend interaction. These tasks are automatically rendered with a start/stop button, allowing users to initiate or halt the task execution directly from the web interface. 
-2. **Synchronous Methods with `@frontend` Decorator**: Synchronous methods without arguments can also be presented in the frontend. For this, they have to be decorated with the `@frontend` decorator.
-
-```python
-import pydase
-import pydase.components
-import pydase.units as u
-from pydase.utils.decorators import frontend
-
-
-class MyService(pydase.DataService):
-    @frontend
-    def exposed_method(self) -> None:
-        ...
-
-    async def my_task(self) -> None:
-        while True:
-            # ...
-```
-
-![Method Components](docs/images/method_components.png)
-
-You can still define synchronous tasks with arguments and call them using a python client. However, decorating them with the `@frontend` decorator will raise a `FunctionDefinitionError`. Defining a task with arguments will raise a `TaskDefinitionError`.
-I decided against supporting function arguments for functions rendered in the frontend due to the following reasons:
-
-1. Feature Request Pitfall: supporting function arguments create a bottomless pit of feature requests. As users encounter the limitations of supported types, demands for extending support to more complex types would grow.
-2. Complexity in Supported Argument Types: while simple types like `int`, `float`, `bool` and `str` could be easily supported, more complicated types are not (representation, (de-)serialization).
-
-### DataService Instances (Nested Classes)
-
-Nested `DataService` instances offer an organized hierarchy for components, enabling richer applications. Each nested class might have its own attributes and methods, each mapped to a frontend component.
-
-Here is an example:
-
-```python
-from pydase import DataService, Server
-
-
-class Channel(DataService):
-    def __init__(self, channel_id: int) -> None:
-        super().__init__()
-        self._channel_id = channel_id
-        self._current = 0.0
-
-    @property
-    def current(self) -> float:
-        # run code to get current
-        result = self._current
-        return result
-
-    @current.setter
-    def current(self, value: float) -> None:
-        # run code to set current
-        self._current = value
-
-
-class Device(DataService):
-    def __init__(self) -> None:
-        super().__init__()
-        self.channels = [Channel(i) for i in range(2)]
-
-
-if __name__ == "__main__":
-    service = Device()
-    Server(service).run()
-```
-
-![Nested Classes App](docs/images/Nested_Class_App.png)
-
-**Note** that defining classes within `DataService` classes is not supported (see [this issue](https://github.com/tiqi-group/pydase/issues/16)).
-
-### Custom Components (`pydase.components`)
-
-The custom components in `pydase` have two main parts:
-
-- A **Python Component Class** in the backend, implementing the logic needed to set, update, and manage the component's state and data.
-- A **Frontend React Component** that renders and manages user interaction in the browser.
-
-Below are the components available in the `pydase.components` module, accompanied by their Python usage:
-
-#### `DeviceConnection`
-
-The `DeviceConnection` component acts as a base class within the `pydase` framework for managing device connections. It provides a structured approach to handle connections by offering a customizable `connect` method and a `connected` property. This setup facilitates the implementation of automatic reconnection logic, which periodically attempts reconnection whenever the connection is lost.
-
-In the frontend, this class abstracts away the direct interaction with the `connect` method and the `connected` property. Instead, it showcases user-defined attributes, methods, and properties. When the `connected` status is `False`, the frontend displays an overlay that prompts manual reconnection through the `connect()` method. Successful reconnection removes the overlay.
-
-```python
-import pydase.components
-import pydase.units as u
-
-
-class Device(pydase.components.DeviceConnection):
-    def __init__(self) -> None:
-        super().__init__()
-        self._voltage = 10 * u.units.V
-
-    def connect(self) -> None:
-        if not self._connected:
-            self._connected = True
-
-    @property
-    def voltage(self) -> float:
-        return self._voltage
-
-
-class MyService(pydase.DataService):
-    def __init__(self) -> None:
-        super().__init__()
-        self.device = Device()
-
-
-if __name__ == "__main__":
-    service_instance = MyService()
-    pydase.Server(service_instance).run()
-```
-
-![DeviceConnection Component](docs/images/DeviceConnection_component.png)
-
-##### Customizing Connection Logic
-
-Users are encouraged to primarily override the `connect` method to tailor the connection process to their specific device. This method should adjust the `self._connected` attribute based on the outcome of the connection attempt:
-
-```python
-import pydase.components
-
-
-class MyDeviceConnection(pydase.components.DeviceConnection):
-    def __init__(self) -> None:
-        super().__init__()
-        # Add any necessary initialization code here
-
-    def connect(self) -> None:
-        # Implement device-specific connection logic here
-        # Update self._connected to `True` if the connection is successful,
-        # or `False` if unsuccessful
-        ...
-```
-
-Moreover, if the connection status requires additional logic, users can override the `connected` property:
-
-```python
-import pydase.components
-
-class MyDeviceConnection(pydase.components.DeviceConnection):
-    def __init__(self) -> None:
-        super().__init__()
-        # Add any necessary initialization code here
-
-    def connect(self) -> None:
-        # Implement device-specific connection logic here
-        # Ensure self._connected reflects the connection status accurately
-        ...
-
-    @property
-    def connected(self) -> bool:
-        # Implement custom logic to accurately report connection status
-        return self._connected
-```
-
-##### Reconnection Interval
-
-The `DeviceConnection` component automatically executes a task that checks for device availability at a default interval of 10 seconds. This interval is adjustable by modifying the `_reconnection_wait_time` attribute on the class instance.
-
-#### `Image`
-
-This component provides a versatile interface for displaying images within the application. Users can update and manage images from various sources, including local paths, URLs, and even matplotlib figures.
-
-The component offers methods to load images seamlessly, ensuring that visual content is easily integrated and displayed within the data service.
-
-```python
-import matplotlib.pyplot as plt
-import numpy as np
-import pydase
-from pydase.components.image import Image
-
-
-class MyDataService(pydase.DataService):
-    my_image = Image()
-
-
-if __name__ == "__main__":
-    service = MyDataService()
-    # loading from local path
-    service.my_image.load_from_path("/your/image/path/")
-
-    # loading from a URL
-    service.my_image.load_from_url("https://cataas.com/cat")
-
-    # loading a matplotlib figure
-    fig = plt.figure()
-    x = np.linspace(0, 2 * np.pi)
-    plt.plot(x, np.sin(x))
-    plt.grid()
-    service.my_image.load_from_matplotlib_figure(fig)
-
-    pydase.Server(service).run()
-```
-
-![Image Component](docs/images/Image_component.png)
-
-#### `NumberSlider`
-
-The `NumberSlider` component in the `pydase` package provides an interactive slider interface for adjusting numerical values on the frontend. It is designed to support both numbers and quantities and ensures that values adjusted on the frontend are synchronized with the backend.
-
-To utilize the `NumberSlider`, users should implement a class that derives from `NumberSlider`. This class can then define the initial values, minimum and maximum limits, step sizes, and additional logic as needed.
-
-Here's an example of how to implement and use a custom slider:
-
-```python
-import pydase
-import pydase.components
-
-
-class MySlider(pydase.components.NumberSlider):
-    def __init__(
-        self,
-        value: float = 0.0,
-        min_: float = 0.0,
-        max_: float = 100.0,
-        step_size: float = 1.0,
-    ) -> None:
-        super().__init__(value, min_, max_, step_size)
-
-    @property
-    def min(self) -> float:
-        return self._min
-
-    @min.setter
-    def min(self, value: float) -> None:
-        self._min = value
-
-    @property
-    def max(self) -> float:
-        return self._max
-
-    @max.setter
-    def max(self, value: float) -> None:
-        self._max = value
-
-    @property
-    def step_size(self) -> float:
-        return self._step_size
-
-    @step_size.setter
-    def step_size(self, value: float) -> None:
-        self._step_size = value
-
-    @property
-    def value(self) -> float:
-        """Slider value."""
-        return self._value
-
-    @value.setter
-    def value(self, value: float) -> None:
-        if value < self._min or value > self._max:
-            raise ValueError("Value is either below allowed min or above max value.")
-
-        self._value = value
-
-
-class MyService(pydase.DataService):
-    def __init__(self) -> None:
-        super().__init__()
-        self.voltage = MySlider()
-
-
-if __name__ == "__main__":
-    service_instance = MyService()
-    service_instance.voltage.value = 5
-    print(service_instance.voltage.value)  # Output: 5
-    pydase.Server(service_instance).run()
-```
-
-In this example, `MySlider` overrides the `min`, `max`, `step_size`, and `value` properties. Users can make any of these properties read-only by omitting the corresponding setter method.
-
-![Slider Component](docs/images/Slider_component.png)
-
-- Accessing parent class resources in `NumberSlider`
-
-  In scenarios where you need the slider component to interact with or access resources from its parent class, you can achieve this by passing a callback function to it. This method avoids directly passing the entire parent class instance (`self`) and offers a more encapsulated approach. The callback function can be designed to utilize specific attributes or methods of the parent class, allowing the slider to perform actions or retrieve data in response to slider events.
-
-  Here's an illustrative example:
-
-  ```python
-  from collections.abc import Callable
-
-  import pydase
-  import pydase.components
-
-
-  class MySlider(pydase.components.NumberSlider):
-      def __init__(
-          self,
-          value: float,
-          on_change: Callable[[float], None],
-      ) -> None:
-          super().__init__(value=value)
-          self._on_change = on_change
-
-      # ... other properties ...
-
-      @property
-      def value(self) -> float:
-          return self._value
-
-      @value.setter
-      def value(self, new_value: float) -> None:
-          if new_value < self._min or new_value > self._max:
-              raise ValueError("Value is either below allowed min or above max value.")
-          self._value = new_value
-          self._on_change(new_value)
-
-
-  class MyService(pydase.DataService):
-      def __init__(self) -> None:
-          self.voltage = MySlider(
-              5,
-              on_change=self.handle_voltage_change,
-          )
-
-      def handle_voltage_change(self, new_voltage: float) -> None:
-          print(f"Voltage changed to: {new_voltage}")
-          # Additional logic here
-
-  if __name__ == "__main__":
-     service_instance = MyService()
-     my_service.voltage.value = 7  # Output: "Voltage changed to: 7"
-     pydase.Server(service_instance).run()
-  ```
-
-- Incorporating units in `NumberSlider`
-
-  The `NumberSlider` is capable of [displaying units](#understanding-units-in-pydase) alongside values, enhancing its usability in contexts where unit representation is crucial. When utilizing `pydase.units`, you can specify units for the slider's value, allowing the component to reflect these units in the frontend.
-
-  Here's how to implement a `NumberSlider` with unit display:
-
-  ```python
-  import pydase
-  import pydase.components
-  import pydase.units as u
-
-  class MySlider(pydase.components.NumberSlider):
-      def __init__(
-          self,
-          value: u.Quantity = 0.0 * u.units.V,
-      ) -> None:
-          super().__init__(value)
-
-      @property
-      def value(self) -> u.Quantity:
-          return self._value
-
-      @value.setter
-      def value(self, value: u.Quantity) -> None:
-          if value.m < self._min or value.m > self._max:
-              raise ValueError("Value is either below allowed min or above max value.")
-          self._value = value
-
-  class MyService(pydase.DataService):
-      def __init__(self) -> None:
-          super().__init__()
-          self.voltage = MySlider()
-
-  if __name__ == "__main__":
-      service_instance = MyService()
-      service_instance.voltage.value = 5 * u.units.V
-      print(service_instance.voltage.value)  # Output: 5 V
-      pydase.Server(service_instance).run()
-  ```
-
-#### `ColouredEnum`
-
-This component provides a way to visually represent different states or categories in a data service using colour-coded options. It behaves similarly to a standard `Enum`, but the values encode colours in a format understood by CSS. The colours can be defined using various methods like Hexadecimal, RGB, HSL, and more.
-
-If the property associated with the `ColouredEnum` has a setter function, the keys of the enum will be rendered as a dropdown menu, allowing users to interact and select different options. Without a setter function, the selected key will simply be displayed as a coloured box with text inside, serving as a visual indicator.
-
-```python
-import pydase
-import pydase.components as pyc
-
-
-class MyStatus(pyc.ColouredEnum):
-    PENDING = "#FFA500"  # Hexadecimal colour (Orange)
-    RUNNING = "#0000FF80"  # Hexadecimal colour with transparency (Blue)
-    PAUSED = "rgb(169, 169, 169)"  # RGB colour (Dark Gray)
-    RETRYING = "rgba(255, 255, 0, 0.3)"  # RGB colour with transparency (Yellow)
-    COMPLETED = "hsl(120, 100%, 50%)"  # HSL colour (Green)
-    FAILED = "hsla(0, 100%, 50%, 0.7)"  # HSL colour with transparency (Red)
-    CANCELLED = "SlateGray"  # Cross-browser colour name (Slate Gray)
-
-
-class StatusTest(pydase.DataService):
-    _status = MyStatus.RUNNING
-
-    @property
-    def status(self) -> MyStatus:
-        return self._status
-
-    @status.setter
-    def status(self, value: MyStatus) -> None:
-        # do something ...
-        self._status = value
-
-# Modifying or accessing the status value:
-my_service = StatusExample()
-my_service.status = MyStatus.FAILED
-```
-
-![ColouredEnum Component](docs/images/ColouredEnum_component.png)
-
-**Note** that each enumeration name and value must be unique.
-This means that you should use different colour formats when you want to use a colour multiple times.
-
-#### Extending with New Components
-
-Users can also extend the library by creating custom components. This involves defining the behavior on the Python backend and the visual representation on the frontend. For those looking to introduce new components, the [guide on adding components](https://pydase.readthedocs.io/en/latest/dev-guide/Adding_Components/) provides detailed steps on achieving this.
-
-<!-- Component User Guide End -->
-
-## Understanding Service Persistence
-
-`pydase` allows you to easily persist the state of your service by saving it to a file. This is especially useful when you want to maintain the service's state across different runs.
-
-To save the state of your service, pass a `filename` keyword argument to the constructor of the `pydase.Server` class. If the file specified by `filename` does not exist, the state manager will create this file and store its state in it when the service is shut down. If the file already exists, the state manager will load the state from this file, setting the values of its attributes to the values stored in the file.
-
-Here's an example:
-
-```python
-from pydase import DataService, Server
-
-class Device(DataService):
-    # ... defining the Device class ...
-
-
-if __name__ == "__main__":
-    service = Device()
-    Server(service, filename="device_state.json").run()
-```
-
-In this example, the state of the `Device` service will be saved to `device_state.json` when the service is shut down. If `device_state.json` exists when the server is started, the state manager will restore the state of the service from this file.
-
-### Controlling Property State Loading with `@load_state`
-
-By default, the state manager only restores values for public attributes of your service. If you have properties that you want to control the loading for, you can use the `@load_state` decorator on your property setters. This indicates to the state manager that the value of the property should be loaded from the state file.
-
-Here is how you can apply the `@load_state` decorator:
-
-```python
-from pydase import DataService
-from pydase.data_service.state_manager import load_state
-
-class Device(DataService):
-    _name = "Default Device Name"
-
-    @property
-    def name(self) -> str:
-        return self._name
-
-    @name.setter
-    @load_state
-    def name(self, value: str) -> None:
-        self._name = value
-```
-
-With the `@load_state` decorator applied to the `name` property setter, the state manager will load and apply the `name` property's value from the file storing the state upon server startup, assuming it exists.
-
-Note: If the service class structure has changed since the last time its state was saved, only the attributes and properties decorated with `@load_state` that have remained the same will be restored from the settings file.
-
-## Understanding Tasks in pydase
-
-In `pydase`, a task is defined as an asynchronous function without arguments contained in a class that inherits from `DataService`. These tasks usually contain a while loop and are designed to carry out periodic functions.
-
-For example, a task might be used to periodically read sensor data, update a database, or perform any other recurring job. One core feature of `pydase` is its ability to automatically generate start and stop functions for these tasks. This allows you to control task execution via both the frontend and python clients, giving you flexible and powerful control over your service's operation.
-
-Another powerful feature of `pydase` is its ability to automatically start tasks upon initialization of the service. By specifying the tasks and their arguments in the `_autostart_tasks` dictionary in your service class's `__init__` method, `pydase` will automatically start these tasks when the server is started. Here's an example:
-
-```python
-from pydase import DataService, Server
-
-class SensorService(DataService):
-    def __init__(self):
-        super().__init__()
-        self.readout_frequency = 1.0
-        self._autostart_tasks["read_sensor_data"] = ()
-
-    def _process_data(self, data: ...) -> None:
-        ...
-
-    def _read_from_sensor(self) -> Any:
-        ...
-
-    async def read_sensor_data(self):
-        while True:
-            data = self._read_from_sensor()
-            self._process_data(data)  # Process the data as needed
-            await asyncio.sleep(self.readout_frequency)
-
-
-if __name__ == "__main__":
-    service = SensorService()
-    Server(service).run()
-```
-
-In this example, `read_sensor_data` is a task that continuously reads data from a sensor. By adding it to the `_autostart_tasks` dictionary, it will automatically start running when `Server(service).run()` is executed.
-As with all tasks, `pydase` will generate `start_read_sensor_data` and `stop_read_sensor_data` methods, which can be called to manually start and stop the data reading task. The readout frequency can be updated using the `readout_frequency` attribute.
-
-## Understanding Units in pydase
-
-`pydase` integrates with the [`pint`](https://pint.readthedocs.io/en/stable/) package to allow you to work with physical quantities within your service. This enables you to define attributes with units, making your service more expressive and ensuring consistency in the handling of physical quantities.
-
-You can define quantities in your `DataService` subclass using `pydase`'s `units` functionality.
-
-Here's an example:
-
-```python
-from typing import Any
-
-import pydase.units as u
-from pydase import DataService, Server
-
-
-class ServiceClass(DataService):
-    voltage = 1.0 * u.units.V
-    _current: u.Quantity = 1.0 * u.units.mA
-
-    @property
-    def current(self) -> u.Quantity:
-        return self._current
-
-    @current.setter
-    def current(self, value: u.Quantity) -> None:
-        self._current = value
-
-
-if __name__ == "__main__":
-    service = ServiceClass()
-
-    service.voltage = 10.0 * u.units.V
-    service.current = 1.5 * u.units.mA
-
-    Server(service).run()
-```
-
-In the frontend, quantities are rendered as floats, with the unit displayed as additional text. This allows you to maintain a clear and consistent representation of physical quantities across both the backend and frontend of your service.
-![Web interface with rendered units](./docs/images/Units_App.png)
-
-Should you need to access the magnitude or the unit of a quantity, you can use the `.m` attribute or the `.u` attribute of the variable, respectively. For example, this could be necessary to set the periodicity of a task:
-
-```python
-import asyncio
-from pydase import DataService, Server
-import pydase.units as u
-
-
-class ServiceClass(DataService):
-    readout_wait_time = 1.0 * u.units.ms
-
-    async def read_sensor_data(self):
-        while True:
-            print("Reading out sensor ...")
-            await asyncio.sleep(self.readout_wait_time.to("s").m)
-
-
-if __name__ == "__main__":
-    service = ServiceClass()
-
-    Server(service).run()
-```
-
-For more information about what you can do with the units, please consult the documentation of [`pint`](https://pint.readthedocs.io/en/stable/).
+<!--getting-started-end-->
 
 ## Configuring pydase via Environment Variables
 
@@ -815,7 +197,6 @@ Configuring `pydase` through environment variables enhances flexibility, securit
     ```
 
 - **`SERVICE_WEB_PORT`**: Defines the port number for the web server. This has to be different for each services running on the same host. Default is 8001.
-- **`SERVICE_RPC_PORT`**: Defines the port number for the rpc server. This has to be different for each services running on the same host. Default is 18871.
 - **`GENERATE_WEB_SETTINGS`**: When set to true, generates / updates the `web_settings.json` file. If the file already exists, only new entries are appended.
 
 Some of those settings can also be altered directly in code when initializing the server: 
@@ -830,7 +211,6 @@ from your_service_module import YourService
 server = Server(
     YourService(),
     web_port=8080,
-    rpc_port=18880,
     config_dir=pathlib.Path("other_config_dir"),  # note that you need to provide an argument of type pathlib.Path
     generate_web_settings=True
 ).run()
@@ -838,62 +218,14 @@ server = Server(
 
 ## Customizing the Web Interface
 
-### Enhancing the Web Interface Style with Custom CSS
+`pydase` allows you to enhance the user experience by customizing the web interface's appearance through
 
-`pydase` allows you to enhance the user experience by customizing the web interface's appearance. You can apply your own styles globally across the web interface by passing a custom CSS file to the server during initialization.
+1. a custom CSS file, and
+2. tailoring the frontend component layout and display style.
 
-Here's how you can use this feature:
+You can also provide a custom frontend source if you need even more flexibility.
 
-1. Prepare your custom CSS file with the desired styles.
-
-2. When initializing your server, use the `css` parameter of the `Server` class to specify the path to your custom CSS file.
-
-```python
-from pydase import Server, DataService
-
-class MyService(DataService):
-    # ... your service definition ...
-
-if __name__ == "__main__":
-    service = MyService()
-    server = Server(service, css="path/to/your/custom.css").run()
-```
-
-This will apply the styles defined in `custom.css` to the web interface, allowing you to maintain branding consistency or improve visual accessibility.
-
-Please ensure that the CSS file path is accessible from the server's running location. Relative or absolute paths can be used depending on your setup.
-
-### Tailoring Frontend Component Layout
-
-`pydase` enables users to customize the frontend layout via the `web_settings.json` file. Each key in the file corresponds to the full access path of public attributes, properties, and methods of the exposed service, using dot-notation.
-
-- **Custom Display Names**: Modify the `"displayName"` value in the file to change how each component appears in the frontend.
-- **Control Component Visibility**: Utilize the `"display"` key-value pair to control whether a component is rendered in the frontend. Set the value to `true` to make the component visible or `false` to hide it.
-<!-- - **Adjustable Component Order**: The `"displayOrder"` values determine the order of components. Alter these values to rearrange the components as desired. -->
-
-The `web_settings.json` file will be stored in the directory specified by `SERVICE_CONFIG_DIR`. You can generate a `web_settings.json` file by setting the `GENERATE_WEB_SETTINGS` to `True`. For more information, see the [configuration section](#configuring-pydase-via-environment-variables).
-
-### Specifying a Custom Frontend Source
-
-To further personalize your web interface, you can provide `pydase` with a custom frontend GUI. To do so, you can use the `frontend_src` keyword in the `pydase.Server`:
-
-```python
-from pathlib import Path
-
-import pydase
-
-
-class MyService(pydase.DataService):
-    # Service definition
-
-
-if __name__ == "__main__":
-    service = MyService()
-    pydase.Server(
-        service,
-        frontend_src=Path("path/to/your/frontend/directory"),
-    ).run()
-```
+For details, please see [here](https://pydase.readthedocs.io/en/stable/user-guide/interaction/main/#customization-options).
 
 ## Logging in pydase
 
@@ -938,12 +270,27 @@ You have two primary ways to adjust the log levels in `pydase`:
 
 ## Documentation
 
-The full documentation provides more detailed information about `pydase`, including advanced usage examples, API references, and tips for troubleshooting common issues. See the [full documentation](https://pydase.readthedocs.io/en/latest/) for more information.
+The full documentation provides more detailed information about `pydase`, including advanced usage examples, API references, and tips for troubleshooting common issues. See the [full documentation](https://pydase.readthedocs.io/en/stable/) for more information.
 
 ## Contributing
 
-We welcome contributions! Please see [contributing.md](https://pydase.readthedocs.io/en/latest/about/contributing/) for details on how to contribute.
+We welcome contributions! Please see [contributing.md](https://pydase.readthedocs.io/en/stable/about/contributing/) for details on how to contribute.
 
 ## License
 
-`pydase` is licensed under the [MIT License](https://github.com/tiqi-group/pydase/blob/main/LICENSE).
+`pydase` is licensed under the [MIT License][License].
+
+[License]: ./LICENSE
+[Observer Pattern]: https://pydase.readthedocs.io/en/docs/dev-guide/Observer_Pattern_Implementation/
+[Service Persistence]: https://pydase.readthedocs.io/en/stable/user-guide/Service_Persistence
+[Defining DataService]: #defining-a-dataService
+[Web Interface Access]: #accessing-the-web-interface
+[Short RPC Client]: #connecting-to-the-service-via-python-rpc-client
+[Customizing Web Interface]: #customizing-the-web-interface
+[Task Management]: https://pydase.readthedocs.io/en/stable/user-guide/Tasks/
+[Units]: https://pydase.readthedocs.io/en/stable/user-guide/Understanding-Units/
+[Property Validation]: https://pydase.readthedocs.io/en/stable/user-guide/Validating-Property-Setters/
+[Custom Components]: https://pydase.readthedocs.io/en/stable/user-guide/Components/#custom-components-pydasecomponents
+[Components]: https://pydase.readthedocs.io/en/stable/user-guide/Components/
+[RESTful API]: https://pydase.readthedocs.io/en/stable/user-guide/interaction/main/#restful-api
+[Python RPC Client]: https://pydase.readthedocs.io/en/stable/user-guide/interaction/main/#python-rpc-client

docs/dev-guide/Adding_Components.md

@@ -111,7 +111,7 @@ Write the React component code, following the structure and patterns used in exi
 
 For example, for the `Image` component, a template could look like this:
 
-```tsx
+```ts
 import React, { useEffect, useRef, useState } from 'react';
 import { Card, Collapse, Image } from 'react-bootstrap';
 import { DocStringComponent } from './DocStringComponent';
@@ -203,8 +203,7 @@ There are two different events a component might want to trigger: updating an at
     
     For illustration, take the `ButtonComponent`. When the button state changes, we want to send this update to the backend:
 
-    ```tsx
-    // file: frontend/src/components/ButtonComponent.tsx
+    ```ts title="frontend/src/components/ButtonComponent.tsx"
     // ... (import statements)
     
     type ButtonComponentProps = {
@@ -249,7 +248,7 @@ There are two different events a component might want to trigger: updating an at
 
     To see how to use the `MethodComponent` in your component, have a look at the `DeviceConnection.tsx` file. Here is an example that demonstrates the usage of the `runMethod` function (also, have a look at the `MethodComponent.tsx` file):
 
-    ```tsx
+    ```ts title="frontend/src/components/_YourComponent_.tsx"
     import { runMethod } from '../socket';
     // ... (other imports)
 
@@ -287,9 +286,7 @@ The `GenericComponent` is responsible for rendering different types of component
 
 At the beginning of the `GenericComponent` file, import the newly created `ImageComponent`:
 
-```tsx
-// file: frontend/src/components/GenericComponent.tsx
-
+```ts title="frontend/src/components/GenericComponent.tsx"
 import { ImageComponent } from './ImageComponent';
 ```
 
@@ -299,7 +296,7 @@ Update the `AttributeType` type definition to include the new type for the `Imag
 
 For example, if the new attribute type is `'Image'` (which should correspond to the name of the backend component class), you can add it to the union:
 
-```tsx
+```ts
 type AttributeType =
   | 'str'
   | 'bool'
@@ -318,7 +315,7 @@ type AttributeType =
 
 Inside the `GenericComponent` function, add a new conditional branch to render the `ImageComponent` when the attribute type is `'Image'`:
 
-```tsx
+```ts
 } else if (attribute.type === 'Image') {
   return (
     <ImageComponent
@@ -348,7 +345,7 @@ For example, updating an `Image` component corresponds to setting a very long st
 
 To create a custom notification message, you can update the message passed to the `addNotification` method in the `useEffect` hook in the component file file. For the `ImageComponent`, this could look like this:
 
-```tsx
+```ts
 const fullAccessPath = [parentPath, name].filter((element) => element).join('.');
 
 useEffect(() => {

docs/dev-guide/Observer_Pattern_Implementation.md

@@ -2,7 +2,7 @@
 
 ## Overview
 
-The Observer Pattern is a fundamental design pattern in the `pydase` package, serving as the central communication mechanism for state updates to clients connected to a service.
+The [Observer Pattern](https://en.wikipedia.org/wiki/Observer_pattern) is a fundamental design pattern in the `pydase` package, serving as the central communication mechanism for state updates to clients connected to a service.
 
 ## How it Works
 

docs/dev-guide/api.md

@@ -0,0 +1,45 @@
+::: pydase.data_service
+    handler: python
+
+::: pydase.server.server
+    handler: python
+
+::: pydase.server.web_server
+    handler: python
+
+::: pydase.client
+    handler: python
+
+::: pydase.components
+    handler: python
+
+::: pydase.task
+    handler: python
+    options:
+      inherited_members: false
+      show_submodules: true
+
+::: pydase.utils.serialization.serializer
+    handler: python
+
+::: pydase.utils.serialization.deserializer
+    handler: python
+    options:
+      show_root_heading: true
+      show_root_toc_entry: false
+      show_symbol_type_heading: true
+      show_symbol_type_toc: true
+
+::: pydase.utils.serialization.types
+    handler: python
+
+::: pydase.utils.decorators
+    handler: python
+    options:
+      filters: ["!render_in_frontend"]
+
+::: pydase.units
+    handler: python
+
+::: pydase.config
+    handler: python

docs/getting-started.md

@@ -1,14 +1,11 @@
 # Getting Started
-## Installation
 {%
    include-markdown "../README.md"
-   start="<!--installation-start-->"
-   end="<!--installation-end-->"
+   start="<!--getting-started-start-->"
+   end="<!--getting-started-end-->"
 %}
 
-## Usage
-{%
-   include-markdown "../README.md"
-   start="<!--usage-start-->"
-   end="<!--usage-end-->"
-%}
+[RESTful API]: ./user-guide/interaction/README.md#restful-api
+[Python RPC Client]: ./user-guide/interaction/README.md#python-rpc-client
+[Custom Components]: ./user-guide/Components.md#custom-components-pydasecomponents
+[Components]: ./user-guide/Components.md

docs/index.md

@@ -1 +1,16 @@
-{% include-markdown "../README.md" %}
+{%
+   include-markdown "../README.md"
+   start="<!--introduction-start-->"
+   end="<!--introduction-end-->"
+%}
+
+[License]: ./about/license.md
+[Observer Pattern]: ./dev-guide/Observer_Pattern_Implementation.md
+[Service Persistence]: ./user-guide/Service_Persistence.md
+[Defining DataService]: ./getting-started.md#defining-a-dataservice
+[Web Interface Access]: ./getting-started.md#accessing-the-web-interface
+[Short RPC Client]: ./getting-started.md#connecting-to-the-service-via-python-rpc-client
+[Customizing Web Interface]: ./user-guide/interaction/README.md#customization-options
+[Task Management]: ./user-guide/Tasks.md
+[Units]: ./user-guide/Understanding-Units.md
+[Property Validation]: ./user-guide/Validating-Property-Setters.md

docs/requirements.txt

@@ -1,20 +1,38 @@
+babel==2.15.0 ; python_version >= "3.10" and python_version < "4.0"
+beautifulsoup4==4.12.3 ; python_version >= "3.10" and python_version < "4.0"
+certifi==2024.7.4 ; python_version >= "3.10" and python_version < "4.0"
+charset-normalizer==3.3.2 ; python_version >= "3.10" and python_version < "4.0"
 click==8.1.7 ; python_version >= "3.10" and python_version < "4.0"
-colorama==0.4.6 ; python_version >= "3.10" and python_version < "4.0" and platform_system == "Windows"
+colorama==0.4.6 ; python_version >= "3.10" and python_version < "4.0"
 ghp-import==2.1.0 ; python_version >= "3.10" and python_version < "4.0"
-jinja2==3.1.2 ; python_version >= "3.10" and python_version < "4.0"
-markdown==3.4.4 ; python_version >= "3.10" and python_version < "4.0"
-markupsafe==2.1.3 ; python_version >= "3.10" and python_version < "4.0"
+griffe==1.1.0 ; python_version >= "3.10" and python_version < "4.0"
+idna==3.7 ; python_version >= "3.10" and python_version < "4.0"
+jinja2==3.1.4 ; python_version >= "3.10" and python_version < "4.0"
+markdown==3.6 ; python_version >= "3.10" and python_version < "4.0"
+markupsafe==2.1.5 ; python_version >= "3.10" and python_version < "4.0"
 mergedeep==1.3.4 ; python_version >= "3.10" and python_version < "4.0"
-mkdocs-autorefs==0.5.0 ; python_version >= "3.10" and python_version < "4.0"
+mkdocs-autorefs==1.0.1 ; python_version >= "3.10" and python_version < "4.0"
+mkdocs-get-deps==0.2.0 ; python_version >= "3.10" and python_version < "4.0"
 mkdocs-include-markdown-plugin==3.9.1 ; python_version >= "3.10" and python_version < "4.0"
-mkdocs==1.5.3 ; python_version >= "3.10" and python_version < "4.0"
-mkdocstrings==0.22.0 ; python_version >= "3.10" and python_version < "4.0"
-packaging==23.1 ; python_version >= "3.10" and python_version < "4.0"
-pathspec==0.11.2 ; python_version >= "3.10" and python_version < "4.0"
-platformdirs==3.10.0 ; python_version >= "3.10" and python_version < "4.0"
-pymdown-extensions==10.3 ; python_version >= "3.10" and python_version < "4.0"
-python-dateutil==2.8.2 ; python_version >= "3.10" and python_version < "4.0"
+mkdocs-material-extensions==1.3.1 ; python_version >= "3.10" and python_version < "4.0"
+mkdocs-material==9.5.31 ; python_version >= "3.10" and python_version < "4.0"
+mkdocs-swagger-ui-tag==0.6.10 ; python_version >= "3.10" and python_version < "4.0"
+mkdocs==1.6.0 ; python_version >= "3.10" and python_version < "4.0"
+mkdocstrings-python==1.10.8 ; python_version >= "3.10" and python_version < "4.0"
+mkdocstrings==0.25.2 ; python_version >= "3.10" and python_version < "4.0"
+mkdocstrings[python]==0.25.2 ; python_version >= "3.10" and python_version < "4.0"
+packaging==24.1 ; python_version >= "3.10" and python_version < "4.0"
+paginate==0.5.6 ; python_version >= "3.10" and python_version < "4.0"
+pathspec==0.12.1 ; python_version >= "3.10" and python_version < "4.0"
+platformdirs==4.2.2 ; python_version >= "3.10" and python_version < "4.0"
+pygments==2.18.0 ; python_version >= "3.10" and python_version < "4.0"
+pymdown-extensions==10.9 ; python_version >= "3.10" and python_version < "4.0"
+python-dateutil==2.9.0.post0 ; python_version >= "3.10" and python_version < "4.0"
 pyyaml-env-tag==0.1 ; python_version >= "3.10" and python_version < "4.0"
 pyyaml==6.0.1 ; python_version >= "3.10" and python_version < "4.0"
+regex==2024.7.24 ; python_version >= "3.10" and python_version < "4.0"
+requests==2.32.3 ; python_version >= "3.10" and python_version < "4.0"
 six==1.16.0 ; python_version >= "3.10" and python_version < "4.0"
-watchdog==3.0.0 ; python_version >= "3.10" and python_version < "4.0"
+soupsieve==2.5 ; python_version >= "3.10" and python_version < "4.0"
+urllib3==2.2.2 ; python_version >= "3.10" and python_version < "4.0"
+watchdog==4.0.1 ; python_version >= "3.10" and python_version < "4.0"

docs/user-guide/Components.md

@@ -1,6 +1,435 @@
 # Components Guide
-{%
-   include-markdown "../../README.md"
-   start="<!-- Component User Guide Start -->"
-   end="<!-- Component User Guide End -->"
-%}
+
+In `pydase`, components are fundamental building blocks that bridge the Python backend logic with frontend visual representation and interactions. This system can be understood based on the following categories:
+
+## Built-in Type and Enum Components
+
+`pydase` automatically maps standard Python data types to their corresponding frontend components:
+
+- `str`: Translated into a `StringComponent` on the frontend.
+- `int` and `float`: Manifested as the `NumberComponent`.
+- `bool`: Rendered as a `ButtonComponent`.
+- `list`: Each item displayed individually, named after the list attribute and its index.
+- `dict`: Each key-value pair displayed individually, named after the dictionary attribute and its key. **Note** that the dictionary keys must be strings.
+- `enum.Enum`: Presented as an `EnumComponent`, facilitating dropdown selection.
+
+## Method Components
+Within the `DataService` class of `pydase`, only methods devoid of arguments can be represented in the frontend, classified into two distinct categories
+
+1. [**Tasks**](./Tasks.md): Argument-free asynchronous functions, identified within `pydase` as tasks, are inherently designed for frontend interaction. These tasks are automatically rendered with a start/stop button, allowing users to initiate or halt the task execution directly from the web interface. 
+2. **Synchronous Methods with `@frontend` Decorator**: Synchronous methods without arguments can also be presented in the frontend. For this, they have to be decorated with the `@frontend` decorator.
+
+```python
+import pydase
+import pydase.components
+import pydase.units as u
+from pydase.utils.decorators import frontend
+
+
+class MyService(pydase.DataService):
+    @frontend
+    def exposed_method(self) -> None:
+        ...
+
+    async def my_task(self) -> None:
+        while True:
+            # ...
+```
+
+![Method Components](../images/method_components.png)
+
+You can still define synchronous tasks with arguments and call them using a python client. However, decorating them with the `@frontend` decorator will raise a `FunctionDefinitionError`. Defining a task with arguments will raise a `TaskDefinitionError`.
+I decided against supporting function arguments for functions rendered in the frontend due to the following reasons:
+
+1. Feature Request Pitfall: supporting function arguments create a bottomless pit of feature requests. As users encounter the limitations of supported types, demands for extending support to more complex types would grow.
+2. Complexity in Supported Argument Types: while simple types like `int`, `float`, `bool` and `str` could be easily supported, more complicated types are not (representation, (de-)serialization).
+
+## DataService Instances (Nested Classes)
+
+Nested `DataService` instances offer an organized hierarchy for components, enabling richer applications. Each nested class might have its own attributes and methods, each mapped to a frontend component.
+
+Here is an example:
+
+```python
+from pydase import DataService, Server
+
+
+class Channel(DataService):
+    def __init__(self, channel_id: int) -> None:
+        super().__init__()
+        self._channel_id = channel_id
+        self._current = 0.0
+
+    @property
+    def current(self) -> float:
+        # run code to get current
+        result = self._current
+        return result
+
+    @current.setter
+    def current(self, value: float) -> None:
+        # run code to set current
+        self._current = value
+
+
+class Device(DataService):
+    def __init__(self) -> None:
+        super().__init__()
+        self.channels = [Channel(i) for i in range(2)]
+
+
+if __name__ == "__main__":
+    service = Device()
+    Server(service).run()
+```
+
+![Nested Classes App](../images/Nested_Class_App.png)
+
+**Note** that defining classes within `DataService` classes is not supported (see [this issue](https://github.com/tiqi-group/pydase/issues/16)).
+
+## Custom Components (`pydase.components`)
+
+The custom components in `pydase` have two main parts:
+
+- A **Python Component Class** in the backend, implementing the logic needed to set, update, and manage the component's state and data.
+- A **Frontend React Component** that renders and manages user interaction in the browser.
+
+Below are the components available in the `pydase.components` module, accompanied by their Python usage:
+
+### `DeviceConnection`
+
+The `DeviceConnection` component acts as a base class within the `pydase` framework for managing device connections. It provides a structured approach to handle connections by offering a customizable `connect` method and a `connected` property. This setup facilitates the implementation of automatic reconnection logic, which periodically attempts reconnection whenever the connection is lost.
+
+In the frontend, this class abstracts away the direct interaction with the `connect` method and the `connected` property. Instead, it showcases user-defined attributes, methods, and properties. When the `connected` status is `False`, the frontend displays an overlay that prompts manual reconnection through the `connect()` method. Successful reconnection removes the overlay.
+
+```python
+import pydase.components
+import pydase.units as u
+
+
+class Device(pydase.components.DeviceConnection):
+    def __init__(self) -> None:
+        super().__init__()
+        self._voltage = 10 * u.units.V
+
+    def connect(self) -> None:
+        if not self._connected:
+            self._connected = True
+
+    @property
+    def voltage(self) -> float:
+        return self._voltage
+
+
+class MyService(pydase.DataService):
+    def __init__(self) -> None:
+        super().__init__()
+        self.device = Device()
+
+
+if __name__ == "__main__":
+    service_instance = MyService()
+    pydase.Server(service_instance).run()
+```
+
+![DeviceConnection Component](../images/DeviceConnection_component.png)
+
+#### Customizing Connection Logic
+
+Users are encouraged to primarily override the `connect` method to tailor the connection process to their specific device. This method should adjust the `self._connected` attribute based on the outcome of the connection attempt:
+
+```python
+import pydase.components
+
+
+class MyDeviceConnection(pydase.components.DeviceConnection):
+    def __init__(self) -> None:
+        super().__init__()
+        # Add any necessary initialization code here
+
+    def connect(self) -> None:
+        # Implement device-specific connection logic here
+        # Update self._connected to `True` if the connection is successful,
+        # or `False` if unsuccessful
+        ...
+```
+
+Moreover, if the connection status requires additional logic, users can override the `connected` property:
+
+```python
+import pydase.components
+
+class MyDeviceConnection(pydase.components.DeviceConnection):
+    def __init__(self) -> None:
+        super().__init__()
+        # Add any necessary initialization code here
+
+    def connect(self) -> None:
+        # Implement device-specific connection logic here
+        # Ensure self._connected reflects the connection status accurately
+        ...
+
+    @property
+    def connected(self) -> bool:
+        # Implement custom logic to accurately report connection status
+        return self._connected
+```
+
+#### Reconnection Interval
+
+The `DeviceConnection` component automatically executes a task that checks for device availability at a default interval of 10 seconds. This interval is adjustable by modifying the `_reconnection_wait_time` attribute on the class instance.
+
+### `Image`
+
+This component provides a versatile interface for displaying images within the application. Users can update and manage images from various sources, including local paths, URLs, and even matplotlib figures.
+
+The component offers methods to load images seamlessly, ensuring that visual content is easily integrated and displayed within the data service.
+
+```python
+import matplotlib.pyplot as plt
+import numpy as np
+import pydase
+from pydase.components.image import Image
+
+
+class MyDataService(pydase.DataService):
+    my_image = Image()
+
+
+if __name__ == "__main__":
+    service = MyDataService()
+    # loading from local path
+    service.my_image.load_from_path("/your/image/path/")
+
+    # loading from a URL
+    service.my_image.load_from_url("https://cataas.com/cat")
+
+    # loading a matplotlib figure
+    fig = plt.figure()
+    x = np.linspace(0, 2 * np.pi)
+    plt.plot(x, np.sin(x))
+    plt.grid()
+    service.my_image.load_from_matplotlib_figure(fig)
+
+    pydase.Server(service).run()
+```
+
+![Image Component](../images/Image_component.png)
+
+### `NumberSlider`
+
+The `NumberSlider` component in the `pydase` package provides an interactive slider interface for adjusting numerical values on the frontend. It is designed to support both numbers and quantities and ensures that values adjusted on the frontend are synchronized with the backend.
+
+To utilize the `NumberSlider`, users should implement a class that derives from `NumberSlider`. This class can then define the initial values, minimum and maximum limits, step sizes, and additional logic as needed.
+
+Here's an example of how to implement and use a custom slider:
+
+```python
+import pydase
+import pydase.components
+
+
+class MySlider(pydase.components.NumberSlider):
+    def __init__(
+        self,
+        value: float = 0.0,
+        min_: float = 0.0,
+        max_: float = 100.0,
+        step_size: float = 1.0,
+    ) -> None:
+        super().__init__(value, min_, max_, step_size)
+
+    @property
+    def min(self) -> float:
+        return self._min
+
+    @min.setter
+    def min(self, value: float) -> None:
+        self._min = value
+
+    @property
+    def max(self) -> float:
+        return self._max
+
+    @max.setter
+    def max(self, value: float) -> None:
+        self._max = value
+
+    @property
+    def step_size(self) -> float:
+        return self._step_size
+
+    @step_size.setter
+    def step_size(self, value: float) -> None:
+        self._step_size = value
+
+    @property
+    def value(self) -> float:
+        """Slider value."""
+        return self._value
+
+    @value.setter
+    def value(self, value: float) -> None:
+        if value < self._min or value > self._max:
+            raise ValueError("Value is either below allowed min or above max value.")
+
+        self._value = value
+
+
+class MyService(pydase.DataService):
+    def __init__(self) -> None:
+        super().__init__()
+        self.voltage = MySlider()
+
+
+if __name__ == "__main__":
+    service_instance = MyService()
+    service_instance.voltage.value = 5
+    print(service_instance.voltage.value)  # Output: 5
+    pydase.Server(service_instance).run()
+```
+
+In this example, `MySlider` overrides the `min`, `max`, `step_size`, and `value` properties. Users can make any of these properties read-only by omitting the corresponding setter method.
+
+![Slider Component](../images/Slider_component.png)
+
+- Accessing parent class resources in `NumberSlider`
+
+    In scenarios where you need the slider component to interact with or access resources from its parent class, you can achieve this by passing a callback function to it. This method avoids directly passing the entire parent class instance (`self`) and offers a more encapsulated approach. The callback function can be designed to utilize specific attributes or methods of the parent class, allowing the slider to perform actions or retrieve data in response to slider events.
+
+    Here's an illustrative example:
+
+    ```python
+    from collections.abc import Callable
+
+    import pydase
+    import pydase.components
+
+
+    class MySlider(pydase.components.NumberSlider):
+        def __init__(
+            self,
+            value: float,
+            on_change: Callable[[float], None],
+        ) -> None:
+            super().__init__(value=value)
+            self._on_change = on_change
+
+        # ... other properties ...
+
+        @property
+        def value(self) -> float:
+            return self._value
+
+        @value.setter
+        def value(self, new_value: float) -> None:
+            if new_value < self._min or new_value > self._max:
+                raise ValueError("Value is either below allowed min or above max value.")
+            self._value = new_value
+            self._on_change(new_value)
+
+
+    class MyService(pydase.DataService):
+        def __init__(self) -> None:
+            self.voltage = MySlider(
+                5,
+                on_change=self.handle_voltage_change,
+            )
+
+        def handle_voltage_change(self, new_voltage: float) -> None:
+            print(f"Voltage changed to: {new_voltage}")
+            # Additional logic here
+
+    if __name__ == "__main__":
+       service_instance = MyService()
+       my_service.voltage.value = 7  # Output: "Voltage changed to: 7"
+       pydase.Server(service_instance).run()
+    ```
+
+- Incorporating units in `NumberSlider`
+
+    The `NumberSlider` is capable of [displaying units](./Understanding-Units.md) alongside values, enhancing its usability in contexts where unit representation is crucial. When utilizing `pydase.units`, you can specify units for the slider's value, allowing the component to reflect these units in the frontend.
+
+    Here's how to implement a `NumberSlider` with unit display:
+
+    ```python
+    import pydase
+    import pydase.components
+    import pydase.units as u
+
+    class MySlider(pydase.components.NumberSlider):
+        def __init__(
+            self,
+            value: u.Quantity = 0.0 * u.units.V,
+        ) -> None:
+            super().__init__(value)
+
+        @property
+        def value(self) -> u.Quantity:
+            return self._value
+
+        @value.setter
+        def value(self, value: u.Quantity) -> None:
+            if value.m < self._min or value.m > self._max:
+                raise ValueError("Value is either below allowed min or above max value.")
+            self._value = value
+
+    class MyService(pydase.DataService):
+        def __init__(self) -> None:
+            super().__init__()
+            self.voltage = MySlider()
+
+    if __name__ == "__main__":
+        service_instance = MyService()
+        service_instance.voltage.value = 5 * u.units.V
+        print(service_instance.voltage.value)  # Output: 5 V
+        pydase.Server(service_instance).run()
+    ```
+
+### `ColouredEnum`
+
+This component provides a way to visually represent different states or categories in a data service using colour-coded options. It behaves similarly to a standard `Enum`, but the values encode colours in a format understood by CSS. The colours can be defined using various methods like Hexadecimal, RGB, HSL, and more.
+
+If the property associated with the `ColouredEnum` has a setter function, the keys of the enum will be rendered as a dropdown menu, allowing users to interact and select different options. Without a setter function, the selected key will simply be displayed as a coloured box with text inside, serving as a visual indicator.
+
+```python
+import pydase
+import pydase.components as pyc
+
+
+class MyStatus(pyc.ColouredEnum):
+    PENDING = "#FFA500"  # Hexadecimal colour (Orange)
+    RUNNING = "#0000FF80"  # Hexadecimal colour with transparency (Blue)
+    PAUSED = "rgb(169, 169, 169)"  # RGB colour (Dark Gray)
+    RETRYING = "rgba(255, 255, 0, 0.3)"  # RGB colour with transparency (Yellow)
+    COMPLETED = "hsl(120, 100%, 50%)"  # HSL colour (Green)
+    FAILED = "hsla(0, 100%, 50%, 0.7)"  # HSL colour with transparency (Red)
+    CANCELLED = "SlateGray"  # Cross-browser colour name (Slate Gray)
+
+
+class StatusTest(pydase.DataService):
+    _status = MyStatus.RUNNING
+
+    @property
+    def status(self) -> MyStatus:
+        return self._status
+
+    @status.setter
+    def status(self, value: MyStatus) -> None:
+        # do something ...
+        self._status = value
+
+# Modifying or accessing the status value:
+my_service = StatusExample()
+my_service.status = MyStatus.FAILED
+```
+
+![ColouredEnum Component](../images/ColouredEnum_component.png)
+
+**Note** that each enumeration name and value must be unique.
+This means that you should use different colour formats when you want to use a colour multiple times.
+
+### Extending with New Components
+
+Users can also extend the library by creating custom components. This involves defining the behavior on the Python backend and the visual representation on the frontend. For those looking to introduce new components, the [guide on adding components](https://pydase.readthedocs.io/en/latest/dev-guide/Adding_Components/) provides detailed steps on achieving this.
+

docs/user-guide/Service_Persistence.md

@@ -0,0 +1,49 @@
+# Understanding Service Persistence
+
+`pydase` allows you to easily persist the state of your service by saving it to a file. This is especially useful when you want to maintain the service's state across different runs.
+
+To save the state of your service, pass a `filename` keyword argument to the constructor of the `pydase.Server` class. If the file specified by `filename` does not exist, the state manager will create this file and store its state in it when the service is shut down. If the file already exists, the state manager will load the state from this file, setting the values of its attributes to the values stored in the file.
+
+Here's an example:
+
+```python
+import pydase
+
+class Device(pydase.DataService):
+    # ... defining the Device class ...
+
+
+if __name__ == "__main__":
+    service = Device()
+    pydase.Server(service=service, filename="device_state.json").run()
+```
+
+In this example, the state of the `Device` service will be saved to `device_state.json` when the service is shut down. If `device_state.json` exists when the server is started, the state manager will restore the state of the service from this file.
+
+## Controlling Property State Loading with `@load_state`
+
+By default, the state manager only restores values for public attributes of your service. If you have properties that you want to control the loading for, you can use the `@load_state` decorator on your property setters. This indicates to the state manager that the value of the property should be loaded from the state file.
+
+Here is how you can apply the `@load_state` decorator:
+
+```python
+import pydase
+from pydase.data_service.state_manager import load_state
+
+class Device(pydase.DataService):
+    _name = "Default Device Name"
+
+    @property
+    def name(self) -> str:
+        return self._name
+
+    @name.setter
+    @load_state
+    def name(self, value: str) -> None:
+        self._name = value
+```
+
+With the `@load_state` decorator applied to the `name` property setter, the state manager will load and apply the `name` property's value from the file storing the state upon server startup, assuming it exists.
+
+Note: If the service class structure has changed since the last time its state was saved, only the attributes and properties decorated with `@load_state` that have remained the same will be restored from the settings file.
+

docs/user-guide/Tasks.md

@@ -0,0 +1,38 @@
+# Understanding Tasks
+
+In `pydase`, a task is defined as an asynchronous function without arguments that is decorated with the `@task` decorator and contained in a class that inherits from `pydase.DataService`. These tasks usually contain a while loop and are designed to carry out periodic functions. For example, a task might be used to periodically read sensor data, update a database, or perform any other recurring job.
+
+`pydase` allows you to control task execution via both the frontend and Python clients and can automatically start tasks upon initialization of the service. By using the `@task` decorator with the `autostart=True` argument in your service class, `pydase` will automatically start these tasks when the server is started. Here's an example:
+
+```python
+import pydase
+from pydase.task.decorator import task
+
+
+class SensorService(pydase.DataService):
+    def __init__(self):
+        super().__init__()
+        self.readout_frequency = 1.0
+
+    def _process_data(self, data: ...) -> None:
+        ...
+
+    def _read_from_sensor(self) -> Any:
+        ...
+
+    @task(autostart=True)
+    async def read_sensor_data(self):
+        while True:
+            data = self._read_from_sensor()
+            self._process_data(data)  # Process the data as needed
+            await asyncio.sleep(self.readout_frequency)
+
+
+if __name__ == "__main__":
+    service = SensorService()
+    pydase.Server(service=service).run()
+```
+
+In this example, `read_sensor_data` is a task that continuously reads data from a sensor. By decorating it with `@task(autostart=True)`, it will automatically start running when `pydase.Server(service).run()` is executed.
+
+The `@task` decorator replaces the function with a task object that has `start()` and `stop()` methods. This means you can control the task execution directly using these methods. For instance, you can manually start or stop the task by calling `service.read_sensor_data.start()` and `service.read_sensor_data.stop()`, respectively.

docs/user-guide/Understanding-Units.md

@@ -0,0 +1,64 @@
+# Understanding Units
+
+`pydase` integrates with the [`pint`](https://pint.readthedocs.io/en/stable/) package to allow you to work with physical quantities within your service. This enables you to define attributes with units, making your service more expressive and ensuring consistency in the handling of physical quantities.
+
+You can define quantities in your `pydase.DataService` subclass using the `pydase.units` module.
+Here's an example:
+
+```python
+from typing import Any
+
+import pydase
+import pydase.units as u
+
+
+class ServiceClass(pydase.DataService):
+    voltage = 1.0 * u.units.V
+    _current: u.Quantity = 1.0 * u.units.mA
+
+    @property
+    def current(self) -> u.Quantity:
+        return self._current
+
+    @current.setter
+    def current(self, value: u.Quantity) -> None:
+        self._current = value
+
+
+if __name__ == "__main__":
+    service = ServiceClass()
+
+    service.voltage = 10.0 * u.units.V
+    service.current = 1.5 * u.units.mA
+
+    pydase.Server(service=service).run()
+```
+
+In the frontend, quantities are rendered as floats, with the unit displayed as additional text. This allows you to maintain a clear and consistent representation of physical quantities across both the backend and frontend of your service.
+![Web interface with rendered units](../images/Units_App.png)
+
+Should you need to access the magnitude or the unit of a quantity, you can use the `.m` attribute or the `.u` attribute of the variable, respectively. For example, this could be necessary to set the periodicity of a task:
+
+```python
+import asyncio
+import pydase
+import pydase.units as u
+
+
+class ServiceClass(pydase.DataService):
+    readout_wait_time = 1.0 * u.units.ms
+
+    async def read_sensor_data(self):
+        while True:
+            print("Reading out sensor ...")
+            await asyncio.sleep(self.readout_wait_time.to("s").m)
+
+
+if __name__ == "__main__":
+    service = ServiceClass()
+
+    pydase.Server(service=service).run()
+```
+
+For more information about what you can do with the units, please consult the documentation of [`pint`](https://pint.readthedocs.io/en/stable/).
+

docs/user-guide/Validating-Property-Setters.md

@@ -0,0 +1,38 @@
+# Using `validate_set` to Validate Property Setters
+
+The `validate_set` decorator ensures that a property setter reads back the set value using the property getter and checks it against the desired value.
+This decorator can be used to validate that a parameter has been correctly set on a device within a specified precision and timeout.
+
+The decorator takes two keyword arguments: `timeout` and `precision`. The `timeout` argument specifies the maximum time (in seconds) to wait for the value to be within the precision boundary.
+If the value is not within the precision boundary after this time, an exception is raised.
+The `precision` argument defines the acceptable deviation from the desired value.
+If `precision` is `None`, the value must be exact.
+For example, if `precision` is set to `1e-5`, the value read from the device must be within ±0.00001 of the desired value.
+
+Here’s how to use the `validate_set` decorator in a `DataService` class:
+
+```python
+import pydase
+from pydase.observer_pattern.observable.decorators import validate_set
+
+
+class Service(pydase.DataService):
+    def __init__(self) -> None:
+        super().__init__()
+        self._device = RemoteDevice()  # dummy class
+
+    @property
+    def value(self) -> float:
+        # Implement how to get the value from the remote device...
+        return self._device.value
+
+    @value.setter
+    @validate_set(timeout=1.0, precision=1e-5)
+    def value(self, value: float) -> None:
+        # Implement how to set the value on the remote device...
+        self._device.value = value
+
+
+if __name__ == "__main__":
+    pydase.Server(service=Service()).run()
+```

docs/user-guide/interaction/Auto-generated Frontend.md

@@ -0,0 +1,167 @@
+# Auto-generated Frontend
+
+`pydase` automatically generates a frontend interface based on your service definition, representing the current state and controls of the service.
+It simplifies the process of visualization and control of the data and devices managed by your `pydase` service, making it accessible to both developers and end-users.
+
+Through the integration of Socket.IO, the frontend provides real-time updates, reflecting changes as they occur and allowing for immediate interaction with the backend.
+
+
+## Accessing the Frontend
+
+You can access the auto-generated frontend by navigating to the hostname of the device the service is hosted on, followed by the exposed port:
+
+```
+http://<hostname>:<port>/
+```
+
+The frontend uses a component-based approach, representing various data types and control mechanisms as distinct UI components. For more information about this, please refer to [Components Guide](../Components.md).
+
+## Customization Options
+
+`pydase` allows you to enhance the user experience by customizing the web interface's appearance through
+
+1. a custom CSS file, and
+2. tailoring the frontend component layout and display style.
+
+For more advanced customization, you can provide a completely custom frontend source.
+
+### Custom CSS Styling
+
+You can apply your own styles globally across the web interface by passing a custom CSS file to the server during initialization.
+Here's how you can use this feature:
+
+1. Prepare your custom CSS file with the desired styles.
+
+2. When initializing your server, use the `css` parameter of the `Server` class to specify the path to your custom CSS file.
+
+```python
+from pydase import Server, DataService
+
+
+class MyService(DataService):
+    # ... your service definition ...
+
+
+if __name__ == "__main__":
+    service = MyService()
+    server = Server(service, css="path/to/your/custom.css").run()
+```
+
+This will apply the styles defined in `custom.css` to the web interface, allowing you to maintain branding consistency or improve visual accessibility.
+
+Please ensure that the CSS file path is accessible from the server's running location. Relative or absolute paths can be used depending on your setup.
+
+### Tailoring Frontend Component Layout
+
+You can customize the display names, visibility, and order of components via the `web_settings.json` file.
+Each key in the file corresponds to the full access path of public attributes, properties, and methods of the exposed service, using dot-notation.
+
+- **Custom Display Names**: Modify the `"displayName"` value in the file to change how each component appears in the frontend.
+- **Control Component Visibility**: Utilize the `"display"` key-value pair to control whether a component is rendered in the frontend. Set the value to `true` to make the component visible or `false` to hide it.
+- **Adjustable Component Order**: The `"displayOrder"` values determine the order of components. Alter these values to rearrange the components as desired. The value defaults to [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER).
+
+The `web_settings.json` file will be stored in the directory specified by `SERVICE_CONFIG_DIR`. You can generate a `web_settings.json` file by setting the `GENERATE_WEB_SETTINGS` to `True`. For more information, see the [configuration section](#configuring-pydase-via-environment-variables).
+
+For example, styling the following service 
+
+```python
+import pydase
+
+
+class Device(pydase.DataService):
+    name = "My Device"
+    temperature = 1.0
+    power = 1
+
+
+class Service(pydase.DataService):
+    device = Device()
+    state = "RUNNING"
+
+
+if __name__ == "__main__":
+    pydase.Server(Service()).run()
+```
+
+with the following `web_settings.json`
+
+```json
+{
+    "device": {
+        "displayName": "My Device",
+        "displayOrder": 1
+    },
+    "device.name": {
+        "display": false
+    },
+    "device.power": {
+        "displayName": "Power",
+        "displayOrder": 1
+    },
+    "device.temperature": {
+      "displayName": "Temperature",
+      "displayOrder": 0
+    },
+    "state": {
+        "displayOrder": 0
+    }
+}
+```
+
+looks like this:
+
+![Tailoring frontend component layout](../../images/Tailoring_frontend_component_layout.png)
+
+### Specifying a Custom Frontend Source
+
+To further customize your web interface, you can provide a custom frontend source.
+By specifying the `frontend_src` parameter when initializing the server, you can host a tailored frontend application:
+
+```python
+from pathlib import Path
+
+import pydase
+
+
+class MyService(pydase.DataService):
+    # Service definition
+
+
+if __name__ == "__main__":
+    service = MyService()
+    pydase.Server(
+        service,
+        frontend_src=Path("path/to/your/frontend/directory"),
+    ).run()
+```
+
+`pydase` expects a directory structured as follows:
+
+```bash  title="Frontend directory structure"
+<your_frontend_directory>
+├── assets
+│   └── ...
+└── index.html
+```
+
+Any CSS, js, image or other files need to be put into the assets folder for the web server to be able to provide access to it.
+
+#### Example: Custom React Frontend
+
+You can use vite to generate a react app template:
+
+```bash
+npm create vite@latest my-react-app -- --template react
+```
+
+*TODO: Add some useful information here...*
+
+To deploy the custom react frontend, build it with
+
+```bash
+npm run build
+```
+
+and pass the relative path of the output directory to the `frontend_src` parameter of the `pydase.Server`.
+
+**Note** that you have to make sure that all the generated files (except the `index.html`) are in the `assets` folder. In the react app, you can achieve this by not using the `public` folder, but instead using e.g. `src/assets`.

docs/user-guide/interaction/Python Client.md

@@ -0,0 +1,60 @@
+# Python RPC Client
+
+You can connect to the service using the `pydase.Client`. Below is an example of how to establish a connection to a service and interact with it:
+
+```python
+import pydase
+
+# Replace the hostname and port with the IP address and the port of the machine where 
+# the service is running, respectively
+client_proxy = pydase.Client(url="ws://<ip_addr>:<service_port>").proxy
+# client_proxy = pydase.Client(url="wss://your-domain.ch").proxy  # if your service uses ssl-encryption
+
+# Interact with the service attributes as if they were local
+client_proxy.voltage = 5.0
+print(client_proxy.voltage)  # Expected output: 5.0
+```
+
+This example demonstrates setting and retrieving the `voltage` attribute through the client proxy.
+The proxy acts as a local representative of the remote service, enabling straightforward interaction.
+
+The proxy class dynamically synchronizes with the server's exposed attributes. This synchronization allows the proxy to be automatically updated with any attributes or methods that the server exposes, essentially mirroring the server's API. This dynamic updating enables users to interact with the remote service as if they were working with a local object.
+
+## Context Manager
+
+You can also use the client as a context manager which automatically opens and closes the connection again:
+
+```python
+import pydase
+
+
+with pydase.Client(url="ws://localhost:8001") as client:
+    client.proxy.<my_method>()
+```
+
+
+## Tab Completion Support
+
+In interactive environments such as Python interpreters and Jupyter notebooks, the proxy class supports tab completion, which allows users to explore available methods and attributes.
+
+## Integration within Other Services
+
+You can also integrate a client proxy within another service. Here's how you can set it up:
+
+```python
+import pydase
+
+class MyService(pydase.DataService):
+    # Initialize the client without blocking the constructor
+    proxy = pydase.Client(url="ws://<ip_addr>:<service_port>", block_until_connected=False).proxy
+    # proxy = pydase.Client(url="wss://your-domain.ch", block_until_connected=False).proxy  # communicating with ssl-encrypted service
+
+if __name__ == "__main__":
+    service = MyService()
+    # Create a server that exposes this service; adjust the web_port as needed
+    server = pydase.Server(service, web_port=8002). run()
+```
+
+In this setup, the `MyService` class has a `proxy` attribute that connects to a `pydase` service located at `<ip_addr>:8001`.
+The `block_until_connected=False` argument allows the service to start up even if the initial connection attempt fails.
+This configuration is particularly useful in distributed systems where services may start in any order.

docs/user-guide/interaction/README.md

@@ -0,0 +1,81 @@
+# Interacting with `pydase` Services
+
+`pydase` offers multiple ways for users to interact with the services they create, providing flexibility and convenience for different use cases. This section outlines the primary interaction methods available, including an auto-generated frontend, a RESTful API, and a Python client based on Socket.IO.
+
+{%
+   include-markdown "./Auto-generated Frontend.md"
+   heading-offset=1
+%}
+
+{%
+   include-markdown "./RESTful API.md"
+   heading-offset=1
+%}
+
+{%
+   include-markdown "./Python Client.md"
+   heading-offset=1
+%}
+
+<!-- ## 2. **Socket.IO for Real-Time Updates** -->
+<!-- For scenarios requiring real-time data updates, `pydase` includes a Socket.IO server. This feature is ideal for applications where live data tracking is crucial, such as monitoring systems or interactive dashboards. -->
+<!---->
+<!-- ### Key Features: -->
+<!-- - **Live Data Streams**: Receive real-time updates for data changes. -->
+<!-- - **Event-Driven Communication**: Utilize event-based messaging to push updates and handle client actions. -->
+<!---->
+<!-- ### Example Usage: -->
+<!-- Clients can connect to the Socket.IO server to receive updates: -->
+<!-- ```javascript -->
+<!-- var socket = io.connect('http://<hostname>:<port>'); -->
+<!-- socket.on('<event_name>', function(data) { -->
+<!--     console.log(data); -->
+<!-- }); -->
+<!-- ``` -->
+<!---->
+<!-- **Use Cases:** -->
+<!---->
+<!-- - Real-time monitoring and alerts -->
+<!-- - Live data visualization -->
+<!-- - Collaborative applications -->
+<!---->
+<!-- ## 3. **Auto-Generated Frontend** -->
+<!-- `pydase` automatically generates a web frontend based on the service definitions. This frontend is a convenient interface for interacting with the service, especially for users who prefer a graphical interface over command-line or code-based interactions. -->
+<!---->
+<!-- ### Key Features: -->
+<!-- - **User-Friendly Interface**: Intuitive and easy to use, with real-time interaction capabilities. -->
+<!-- - **Customizable**: Adjust the frontend's appearance and functionality to suit specific needs. -->
+<!---->
+<!-- ### Accessing the Frontend: -->
+<!-- Once the service is running, access the frontend via a web browser: -->
+<!-- ``` -->
+<!-- http://<hostname>:<port> -->
+<!-- ``` -->
+<!---->
+<!-- **Use Cases:** -->
+<!---->
+<!-- - End-user interfaces for data control and visualization -->
+<!-- - Rapid prototyping and testing -->
+<!-- - Demonstrations and training -->
+<!---->
+<!-- ## 4. **Python Client** -->
+<!-- `pydase` also provides a Python client for programmatic interactions. This client is particularly useful for developers who want to integrate `pydase` services into other Python applications or automate interactions. -->
+<!---->
+<!-- ### Key Features: -->
+<!-- - **Direct Interaction**: Call methods and access properties as if they were local. -->
+<!-- - **Tab Completion**: Supports tab completion in interactive environments like Jupyter notebooks. -->
+<!---->
+<!-- ### Example Usage: -->
+<!-- ```python -->
+<!-- import pydase -->
+<!---->
+<!-- client = pydase.Client(hostname="<ip_addr>", port=8001) -->
+<!-- service = client.proxy -->
+<!-- service.some_method() -->
+<!-- ``` -->
+<!---->
+<!-- **Use Cases:** -->
+<!---->
+<!-- - Integrating with other Python applications -->
+<!-- - Automation and scripting -->
+<!-- - Data analysis and manipulation -->

docs/user-guide/interaction/RESTful API.md

@@ -0,0 +1,22 @@
+# RESTful API
+
+The `pydase` RESTful API allows for standard HTTP-based interactions and provides access to various functionalities through specific routes. This is particularly useful for integrating `pydase` services with other applications or for scripting and automation.
+
+For example, you can get a value like this:
+
+```python
+import json
+
+import requests
+
+response = requests.get(
+    "http://<hostname>:<port>/api/v1/get_value?access_path=<full_access_path>"
+)
+serialized_value = json.loads(response.text)
+```
+
+To help developers understand and utilize the API, we provide an OpenAPI specification. This specification describes the available endpoints and corresponding request/response formats.
+
+## OpenAPI Specification
+
+<swagger-ui src="./openapi.yaml"/>

docs/user-guide/interaction/openapi.yaml

@@ -0,0 +1,326 @@
+openapi: 3.1.0
+info:
+  version: 1.0.0
+  title: pydase API
+tags:
+  - name: /api/v1
+    description: Version 1
+paths:
+  /api/v1/get_value:
+    get:
+      tags:
+        - /api/v1
+      summary: Get the value of an existing attribute.
+      description: Get the value of an existing attribute by full access path.
+      operationId: getValue
+      parameters:
+        - in: query
+          name: access_path
+          schema:
+            type: string
+          example:  device.channel[0].voltage
+          required: true
+          description: Full access path of the service attribute.
+      responses:
+        '200':
+          description: Successful Operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SerializedAttribute'
+              examples:
+                Exists:
+                  summary: Attribute exists
+                  value:
+                    docs: My documentation string.
+                    full_access_path: device.channel[0].voltage
+                    readonly: false
+                    type: float
+                    value: 12.1
+        '400':
+          description: Could not get attribute
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SerializedException'
+              examples:
+                Attribute:
+                  summary: Attribute does not exist
+                  value:
+                    docs: null
+                    full_access_path: ""
+                    name: AttributeError
+                    readonly: true
+                    type: Exception
+                    value: "'MyService' object has no attribute 'invalid_attribute'"
+                List:
+                  summary: List index out of range
+                  value:
+                    docs: null
+                    full_access_path: ""
+                    name: IndexError
+                    readonly: true
+                    type: Exception
+                    value: "list index out of range"
+  /api/v1/update_value:
+    put:
+      tags:
+        - /api/v1
+      summary: Update an existing attribute.
+      description: Update an existing attribute by full access path.
+      operationId: updateValue
+      requestBody:
+        description: Update an existent attribute in the service
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/UpdateValue'
+        required: true
+      responses:
+        '200':
+          description: Successful Operation
+        '400':
+          description: Could not Update Attribute
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SerializedException'
+              examples:
+                Attribute:
+                  summary: Attribute does not exist
+                  value:
+                    docs: null
+                    full_access_path: ""
+                    name: AttributeError
+                    readonly: true
+                    type: Exception
+                    value: "'MyService' object has no attribute 'invalid_attribute'"
+                ReadOnly:
+                  summary: Attribute is read-only
+                  value:
+                    docs: null
+                    full_access_path: ""
+                    name: AttributeError
+                    readonly: true
+                    type: Exception
+                    value: "property 'readonly_property' of 'MyService' object has no setter"
+                List:
+                  summary: List index out of range
+                  value:
+                    docs: null
+                    full_access_path: ""
+                    name: IndexError
+                    readonly: true
+                    type: Exception
+                    value: "list index out of range"
+  /api/v1/trigger_method:
+    put:
+      tags:
+        - /api/v1
+      summary: Trigger method.
+      description: Trigger method with by full access path with provided args and kwargs.
+      operationId: triggerMethod
+      requestBody:
+        description: Update an existent attribute in the service
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/TriggerMethod'
+        required: true
+      responses:
+        '200':
+          description: Successful Operation
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SerializedAttribute'
+              examples:
+                NoneReturn:
+                  summary: Function returns None
+                  value:
+                    docs: null
+                    full_access_path: ""
+                    readonly: false
+                    type: "NoneType"
+                    value: null
+                FloatReturn:
+                  summary: Function returns float
+                  value:
+                    docs: null
+                    full_access_path: ""
+                    readonly: false
+                    type: "float"
+                    value: 23.2
+        '400':
+          description: Method does not exist
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/SerializedException'
+              examples:
+                Args:
+                  summary: Wrong number of arguments
+                  value:
+                    docs: null
+                    full_access_path: ""
+                    name: TypeError
+                    readonly: true
+                    type: Exception
+                    value: "MyService.some_function() takes 1 positional argument but 2 were given"
+                Attribute:
+                  summary: Attribute does not exist
+                  value:
+                    docs: null
+                    full_access_path: ""
+                    name: AttributeError
+                    readonly: true
+                    type: Exception
+                    value: "'MyService' object has no attribute 'invalid_method'"
+                List:
+                  summary: List index out of range
+                  value:
+                    docs: null
+                    full_access_path: ""
+                    name: IndexError
+                    readonly: true
+                    type: Exception
+                    value: "list index out of range"
+                Dict:
+                  summary: Dictionary key does not exist
+                  value:
+                    docs: null
+                    full_access_path: ""
+                    name: KeyError
+                    readonly: true
+                    type: Exception
+                    value: "invalid_key"
+components:
+  schemas:
+    UpdateValue:
+      required:
+        - access_path
+        - value
+      type: object
+      properties:
+        access_path:
+          type: string
+          example: device.channel[0].voltage
+        value:
+          $ref: '#/components/schemas/SerializedValue'
+    TriggerMethod:
+      required:
+        - access_path
+      type: object
+      properties:
+        access_path:
+          type: string
+          example: device.channel[0].voltage
+        args:
+          type: object
+          required:
+            - type
+            - value
+            - full_access_path
+          properties:
+            full_access_path:
+              type: string
+              example: ""
+            type:
+              type: string
+              enum:
+                - list
+            value:
+              type: array
+              items:
+                $ref: '#/components/schemas/SerializedValue'
+        kwargs:
+          type: object
+          required:
+            - type
+            - value
+            - full_access_path
+          properties:
+            full_access_path:
+              type: string
+              example: ""
+            type:
+              type: string
+              enum:
+                - dict
+            value:
+              type: object
+              additionalProperties:
+                $ref: '#/components/schemas/SerializedValue'
+    SerializedValue:
+      required:
+        - full_access_path
+        - type
+        - value
+      type: object
+      properties:
+        docs:
+          type: string | null
+          example: null
+        full_access_path:
+          type: string
+          example: ""
+        readonly:
+          type: boolean
+          example: false
+        type:
+          type: string
+          example: float
+        value:
+          type: any
+          example: 22.0
+    SerializedAttribute:
+      required:
+        - full_access_path
+        - type
+        - value
+      type: object
+      properties:
+        docs:
+          type: string | null
+          example: My documentation string.
+        full_access_path:
+          type: string
+          example: device.channel[0].voltage
+        readonly:
+          type: boolean
+          example: false
+        type:
+          type: string
+          example: float
+        value:
+          type: any
+          example: 22.0
+    SerializedException:
+      required:
+        - full_access_path
+        - type
+        - value
+      type: object
+      properties:
+        docs:
+          type: string | null
+          example: Raised when the access path does not correspond to a valid attribute.
+        full_access_path:
+          type: string
+          example: ""
+        name:
+          type: string
+          example: SerializationPathError
+        readonly:
+          type: boolean
+          example: true
+        type:
+          type: string
+          example: Exception
+        value:
+          type: string
+          examples:
+            value:
+              "Index '2': list index out of range"
+            some:
+              "Index '2': list index out of range"

frontend/.eslintrc

@@ -1,16 +0,0 @@
-{
-    "root": true,
-    "parser": "@typescript-eslint/parser",
-    "plugins": [
-        "@typescript-eslint",
-        "prettier"
-    ],
-    "extends": [
-        "eslint:recommended",
-        "plugin:@typescript-eslint/recommended",
-        "prettier"
-    ],
-    "rules": {
-        "prettier/prettier": "error"
-    }
-}

frontend/.gitignore

@@ -1,20 +1,24 @@
-# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
-
-# dependencies
-/node_modules
-/.pnp
-.pnp.js
-
-# testing
-/coverage
-
-# misc
-.DS_Store
-.env.local
-.env.development.local
-.env.test.local
-.env.production.local
-
+# Logs
+logs
+*.log
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?

frontend/.prettierrc

@@ -1,11 +1,9 @@
 {
-  "arrowParens": "always",
-  "bracketSameLine": true,
-  "endOfLine": "auto",
-  "semi": true,
-  "singleQuote": true,
-  "tabWidth": 2,
-  "vueIndentScriptAndStyle": true,
-  "printWidth": 88,
-  "trailingComma": "none"
+    "arrowParens": "always",
+    "bracketSameLine": true,
+    "endOfLine": "auto",
+    "semi": true,
+    "singleQuote": false,
+    "tabWidth": 2,
+    "printWidth": 88
 }

frontend/README.md

@@ -1,70 +1,30 @@
-# Getting Started with Create React App
+# React + TypeScript + Vite
 
-This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
+This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
 
-## Available Scripts
+Currently, two official plugins are available:
 
-In the project directory, you can run:
+- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react/README.md) uses [Babel](https://babeljs.io/) for Fast Refresh
+- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
 
-### `npm start`
+## Expanding the ESLint configuration
 
-Runs the app in the development mode.\
-Open [http://localhost:3000](http://localhost:3000) to view it in your browser.
+If you are developing a production application, we recommend updating the configuration to enable type aware lint rules:
 
-The page will reload when you make changes.\
-You may also see any lint errors in the console.
+- Configure the top-level `parserOptions` property like this:
 
-### `npm test`
+```js
+export default {
+  // other rules...
+  parserOptions: {
+    ecmaVersion: 'latest',
+    sourceType: 'module',
+    project: ['./tsconfig.json', './tsconfig.node.json'],
+    tsconfigRootDir: __dirname,
+  },
+}
+```
 
-Launches the test runner in the interactive watch mode.\
-See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
-
-### `npm run build`
-
-Builds the app for production to the `build` folder.\
-It correctly bundles React in production mode and optimizes the build for the best performance.
-
-The build is minified and the filenames include the hashes.\
-Your app is ready to be deployed!
-
-See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
-
-### `npm run eject`
-
-**Note: this is a one-way operation. Once you `eject`, you can't go back!**
-
-If you aren't satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
-
-Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you're on your own.
-
-You don't have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn't feel obligated to use this feature. However we understand that this tool wouldn't be useful if you couldn't customize it when you are ready for it.
-
-## Learn More
-
-You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
-
-To learn React, check out the [React documentation](https://reactjs.org/).
-
-### Code Splitting
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/code-splitting](https://facebook.github.io/create-react-app/docs/code-splitting)
-
-### Analyzing the Bundle Size
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size](https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size)
-
-### Making a Progressive Web App
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app](https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app)
-
-### Advanced Configuration
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/advanced-configuration](https://facebook.github.io/create-react-app/docs/advanced-configuration)
-
-### Deployment
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/deployment](https://facebook.github.io/create-react-app/docs/deployment)
-
-### `npm run build` fails to minify
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify](https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify)
+- Replace `plugin:@typescript-eslint/recommended` to `plugin:@typescript-eslint/recommended-type-checked` or `plugin:@typescript-eslint/strict-type-checked`
+- Optionally add `plugin:@typescript-eslint/stylistic-type-checked`
+- Install [eslint-plugin-react](https://github.com/jsx-eslint/eslint-plugin-react) and add `plugin:react/recommended` & `plugin:react/jsx-runtime` to the `extends` list

frontend/eslint.config.js

@@ -0,0 +1,24 @@
+import eslint from "@eslint/js";
+import tseslint from "typescript-eslint";
+import eslintPluginPrettierRecommended from "eslint-plugin-prettier/recommended";
+import reactRecommended from "eslint-plugin-react/configs/recommended.js";
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  ...tseslint.configs.recommended,
+  ...tseslint.configs.stylistic,
+  {
+    files: ["**/*.{js,jsx,ts,tsx}"],
+    ...reactRecommended,
+    languageOptions: {
+      parser: tseslint.parser,
+    },
+    rules: {
+      "prettier/prettier": "error",
+      "react/react-in-jsx-scope": "off",
+      "react/prop-types": "off",
+      "@typescript-eslint/no-empty-function": "off",
+    },
+  },
+  eslintPluginPrettierRecommended,
+);

frontend/index.html

@@ -0,0 +1,17 @@
+<!doctype html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="theme-color" content="#000000" />
+    <meta name="description" content="Web site displaying a pydase UI." />
+</head>
+
+<body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+    <script type="module" src="/src/index.tsx"></script>
+</body>
+
+</html>

frontend/package.json

@@ -1,58 +1,40 @@
 {
-  "name": "pydase",
-  "version": "0.1.0",
-  "private": true,
-  "dependencies": {
-    "@emotion/react": "^11.11.1",
-    "@emotion/styled": "^11.11.0",
-    "@fsouza/prettierd": "^0.25.1",
-    "@mui/material": "^5.14.1",
-    "@testing-library/jest-dom": "^5.16.5",
-    "@testing-library/react": "^13.4.0",
-    "@testing-library/user-event": "^13.5.0",
-    "bootstrap": "^5.3.0",
-    "react": "^18.2.0",
-    "react-bootstrap": "^2.8.0",
-    "react-bootstrap-icons": "^1.10.3",
-    "react-dom": "^18.2.0",
-    "react-scripts": "5.0.1",
-    "socket.io-client": "^4.7.1",
-    "web-vitals": "^3.4.0"
-  },
-  "scripts": {
-    "start": "NODE_ENV=development react-scripts start",
-    "build": "BUILD_PATH='../src/pydase/frontend' react-scripts build",
-    "test": "react-scripts test",
-    "eject": "react-scripts eject"
-  },
-  "eslintConfig": {
-    "extends": [
-      "react-app",
-      "react-app/jest"
-    ]
-  },
-  "browserslist": {
-    "production": [
-      ">0.2%",
-      "not dead",
-      "not op_mini all"
-    ],
-    "development": [
-      "last 1 chrome version",
-      "last 1 firefox version",
-      "last 1 safari version"
-    ]
-  },
-  "devDependencies": {
-    "@types/node": "^20.0.0",
-    "@types/react": "^18.0.0",
-    "@types/react-dom": "^18.0.0",
-    "@typescript-eslint/eslint-plugin": "^6.11.0",
-    "@typescript-eslint/parser": "^6.9.0",
-    "eslint": "^8.52.0",
-    "eslint-config-prettier": "^9.0.0",
-    "eslint-plugin-prettier": "^5.0.1",
-    "prettier": "^3.0.3",
-    "typescript": "^4.9.0"
-  }
+    "name": "pydase",
+    "private": true,
+    "version": "0.1.0",
+    "type": "module",
+    "scripts": {
+        "dev": "vite",
+        "build": "tsc -b && vite build --emptyOutDir",
+        "lint": "eslint . --report-unused-disable-directives --max-warnings 0",
+        "preview": "vite preview"
+    },
+    "dependencies": {
+        "@emotion/styled": "^11.11.0",
+        "@mui/material": "^5.14.1",
+        "bootstrap": "^5.3.3",
+        "deep-equal": "^2.2.3",
+        "react": "^18.3.1",
+        "react-bootstrap": "^2.10.0",
+        "react-bootstrap-icons": "^1.11.4",
+        "socket.io-client": "^4.7.1"
+    },
+    "devDependencies": {
+        "@eslint/js": "^9.6.0",
+        "@types/deep-equal": "^1.0.4",
+        "@types/eslint__js": "^8.42.3",
+        "@types/node": "^20.14.10",
+        "@types/react": "^18.3.3",
+        "@types/react-dom": "^18.3.0",
+        "@typescript-eslint/eslint-plugin": "^7.15.0",
+        "@vitejs/plugin-react-swc": "^3.5.0",
+        "eslint": "^8.57.0",
+        "eslint-config-prettier": "^9.1.0",
+        "eslint-plugin-prettier": "^5.1.3",
+        "eslint-plugin-react": "^7.34.3",
+        "prettier": "3.3.2",
+        "typescript": "^5.5.3",
+        "typescript-eslint": "^7.15.0",
+        "vite": "^5.3.1"
+    }
 }

frontend/public/index.html

@@ -1,43 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8" />
-    <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
-    <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <meta name="theme-color" content="#000000" />
-    <meta
-      name="description"
-      content="Web site displaying a pydase UI."
-    />
-    <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
-    <!--
-      manifest.json provides metadata used when your web app is installed on a
-      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
-    -->
-    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
-    <!--
-      Notice the use of %PUBLIC_URL% in the tags above.
-      It will be replaced with the URL of the `public` folder during the build.
-      Only files inside the `public` folder can be referenced from the HTML.
-
-      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
-      work correctly both with client-side routing and a non-root public URL.
-      Learn how to configure a non-root public URL by running `npm run build`.
-    -->
-    <title>pydase App</title>
-  </head>
-  <body>
-    <noscript>You need to enable JavaScript to run this app.</noscript>
-    <div id="root"></div>
-    <!--
-      This HTML file is a template.
-      If you open it directly in the browser, you will see an empty page.
-
-      You can add webfonts, meta tags, or analytics to this file.
-      The build step will place the bundled scripts into the <body> tag.
-
-      To begin the development, run `npm start` or `yarn start`.
-      To create a production bundle, use `npm run build` or `yarn build`.
-    -->
-  </body>
-</html>

frontend/public/manifest.json

@@ -1,25 +0,0 @@
-{
-  "short_name": "React App",
-  "name": "Create React App Sample",
-  "icons": [
-    {
-      "src": "favicon.ico",
-      "sizes": "64x64 32x32 24x24 16x16",
-      "type": "image/x-icon"
-    },
-    {
-      "src": "logo192.png",
-      "type": "image/png",
-      "sizes": "192x192"
-    },
-    {
-      "src": "logo512.png",
-      "type": "image/png",
-      "sizes": "512x512"
-    }
-  ],
-  "start_url": ".",
-  "display": "standalone",
-  "theme_color": "#000000",
-  "background_color": "#ffffff"
-}

frontend/public/robots.txt

@@ -1,3 +0,0 @@
-# https://www.robotstxt.org/robotstxt.html
-User-agent: *
-Disallow:

frontend/src/App.tsx

@@ -1,43 +1,49 @@
-import { useCallback, useEffect, useReducer, useState } from 'react';
-import { Navbar, Form, Offcanvas, Container } from 'react-bootstrap';
-import { hostname, port, socket } from './socket';
-import './App.css';
+import { useCallback, useEffect, useReducer, useState } from "react";
+import { Navbar, Form, Offcanvas, Container } from "react-bootstrap";
+import { hostname, port, socket } from "./socket";
+import "./App.css";
 import {
   Notifications,
   Notification,
-  LevelName
-} from './components/NotificationsComponent';
-import { ConnectionToast } from './components/ConnectionToast';
-import { setNestedValueByPath, State } from './utils/stateUtils';
-import { WebSettingsContext, WebSetting } from './WebSettings';
-import { SerializedValue, GenericComponent } from './components/GenericComponent';
+  LevelName,
+} from "./components/NotificationsComponent";
+import { ConnectionToast } from "./components/ConnectionToast";
+import { setNestedValueByPath, State } from "./utils/stateUtils";
+import { WebSettingsContext, WebSetting } from "./WebSettings";
+import { GenericComponent } from "./components/GenericComponent";
+import { SerializedObject } from "./types/SerializedObject";
+import useLocalStorage from "./hooks/useLocalStorage";
 
 type Action =
-  | { type: 'SET_DATA'; data: State }
+  | { type: "SET_DATA"; data: State }
   | {
-      type: 'UPDATE_ATTRIBUTE';
+      type: "UPDATE_ATTRIBUTE";
       fullAccessPath: string;
-      newValue: SerializedValue;
+      newValue: SerializedObject;
     };
-type UpdateMessage = {
-  data: { full_access_path: string; value: SerializedValue };
-};
-type LogMessage = {
+interface UpdateMessage {
+  data: { full_access_path: string; value: SerializedObject };
+}
+interface LogMessage {
   levelname: LevelName;
   message: string;
-};
+}
 
-const reducer = (state: State, action: Action): State => {
+const reducer = (state: State | null, action: Action): State | null => {
   switch (action.type) {
-    case 'SET_DATA':
+    case "SET_DATA":
       return action.data;
-    case 'UPDATE_ATTRIBUTE': {
+    case "UPDATE_ATTRIBUTE": {
       if (state === null) {
         return null;
       }
       return {
         ...state,
-        value: setNestedValueByPath(state.value, action.fullAccessPath, action.newValue)
+        value: setNestedValueByPath(
+          state.value as Record<string, SerializedObject>,
+          action.fullAccessPath,
+          action.newValue,
+        ),
       };
     }
     default:
@@ -46,12 +52,19 @@ const reducer = (state: State, action: Action): State => {
 };
 const App = () => {
   const [state, dispatch] = useReducer(reducer, null);
+  const [serviceName, setServiceName] = useState<string | null>(null);
   const [webSettings, setWebSettings] = useState<Record<string, WebSetting>>({});
-  const [isInstantUpdate, setIsInstantUpdate] = useState(false);
+  const [isInstantUpdate, setIsInstantUpdate] = useLocalStorage(
+    "isInstantUpdate",
+    false,
+  );
   const [showSettings, setShowSettings] = useState(false);
-  const [showNotification, setShowNotification] = useState(false);
+  const [showNotification, setShowNotification] = useLocalStorage(
+    "showNotification",
+    false,
+  );
   const [notifications, setNotifications] = useState<Notification[]>([]);
-  const [connectionStatus, setConnectionStatus] = useState('connecting');
+  const [connectionStatus, setConnectionStatus] = useState("connecting");
 
   useEffect(() => {
     // Allow the user to add a custom css file
@@ -59,49 +72,54 @@ const App = () => {
       .then((response) => {
         if (response.ok) {
           // If the file exists, create a link element for the custom CSS
-          const link = document.createElement('link');
+          const link = document.createElement("link");
           link.href = `http://${hostname}:${port}/custom.css`;
-          link.type = 'text/css';
-          link.rel = 'stylesheet';
+          link.type = "text/css";
+          link.rel = "stylesheet";
           document.head.appendChild(link);
         }
       })
       .catch(console.error); // Handle the error appropriately
 
-    socket.on('connect', () => {
+    socket.on("connect", () => {
       // Fetch data from the API when the client connects
       fetch(`http://${hostname}:${port}/service-properties`)
         .then((response) => response.json())
-        .then((data: State) => dispatch({ type: 'SET_DATA', data }));
+        .then((data: State) => {
+          dispatch({ type: "SET_DATA", data });
+          setServiceName(data.name);
+
+          document.title = data.name; // Setting browser tab title
+        });
       fetch(`http://${hostname}:${port}/web-settings`)
         .then((response) => response.json())
         .then((data: Record<string, WebSetting>) => setWebSettings(data));
-      setConnectionStatus('connected');
+      setConnectionStatus("connected");
     });
-    socket.on('disconnect', () => {
-      setConnectionStatus('disconnected');
+    socket.on("disconnect", () => {
+      setConnectionStatus("disconnected");
       setTimeout(() => {
         // Only set "reconnecting" is the state is still "disconnected"
         // E.g. when the client has already reconnected
         setConnectionStatus((currentState) =>
-          currentState === 'disconnected' ? 'reconnecting' : currentState
+          currentState === "disconnected" ? "reconnecting" : currentState,
         );
       }, 2000);
     });
 
-    socket.on('notify', onNotify);
-    socket.on('log', onLogMessage);
+    socket.on("notify", onNotify);
+    socket.on("log", onLogMessage);
 
     return () => {
-      socket.off('notify', onNotify);
-      socket.off('log', onLogMessage);
+      socket.off("notify", onNotify);
+      socket.off("log", onLogMessage);
     };
   }, []);
 
   // Adding useCallback to prevent notify to change causing a re-render of all
   // components
   const addNotification = useCallback(
-    (message: string, levelname: LevelName = 'DEBUG') => {
+    (message: string, levelname: LevelName = "DEBUG") => {
       // Getting the current time in the required format
       const timeStamp = new Date().toISOString().substring(11, 19);
       // Adding an id to the notification to provide a way of removing it
@@ -110,15 +128,15 @@ const App = () => {
       // Custom logic for notifications
       setNotifications((prevNotifications) => [
         { levelname, id, message, timeStamp },
-        ...prevNotifications
+        ...prevNotifications,
       ]);
     },
-    []
+    [],
   );
 
   const removeNotificationById = (id: number) => {
     setNotifications((prevNotifications) =>
-      prevNotifications.filter((n) => n.id !== id)
+      prevNotifications.filter((n) => n.id !== id),
     );
   };
 
@@ -131,9 +149,9 @@ const App = () => {
 
     // Dispatching the update to the reducer
     dispatch({
-      type: 'UPDATE_ATTRIBUTE',
+      type: "UPDATE_ATTRIBUTE",
       fullAccessPath,
-      newValue
+      newValue,
     });
   }
 
@@ -149,7 +167,7 @@ const App = () => {
     <>
       <Navbar expand={false} bg="primary" variant="dark" fixed="top">
         <Container fluid>
-          <Navbar.Brand>Data Service App</Navbar.Brand>
+          <Navbar.Brand>{serviceName}</Navbar.Brand>
           <Navbar.Toggle aria-controls="offcanvasNavbar" onClick={handleShowSettings} />
         </Container>
       </Navbar>
@@ -188,7 +206,7 @@ const App = () => {
       <div className="App navbarOffset">
         <WebSettingsContext.Provider value={webSettings}>
           <GenericComponent
-            attribute={state as SerializedValue}
+            attribute={state as SerializedObject}
             isInstantUpdate={isInstantUpdate}
             addNotification={addNotification}
           />

frontend/src/WebSettings.tsx

@@ -1,9 +1,9 @@
-import { createContext } from 'react';
+import { createContext } from "react";
 
 export const WebSettingsContext = createContext<Record<string, WebSetting>>({});
 
-export type WebSetting = {
+export interface WebSetting {
   displayName: string;
   display: boolean;
-  index: number;
-};
+  displayOrder: number;
+}

frontend/src/components/AsyncMethodComponent.tsx

@@ -1,91 +0,0 @@
-import React, { useEffect, useRef, useState } from 'react';
-import { runMethod } from '../socket';
-import { Form, Button, InputGroup, Spinner } from 'react-bootstrap';
-import { DocStringComponent } from './DocStringComponent';
-import { LevelName } from './NotificationsComponent';
-
-type AsyncMethodProps = {
-  fullAccessPath: string;
-  value: 'RUNNING' | null;
-  docString?: string;
-  hideOutput?: boolean;
-  addNotification: (message: string, levelname?: LevelName) => void;
-  displayName: string;
-  id: string;
-  render: boolean;
-};
-
-export const AsyncMethodComponent = React.memo((props: AsyncMethodProps) => {
-  const {
-    fullAccessPath,
-    docString,
-    value: runningTask,
-    addNotification,
-    displayName,
-    id
-  } = props;
-
-  // Conditional rendering based on the 'render' prop.
-  if (!props.render) {
-    return null;
-  }
-
-  const renderCount = useRef(0);
-  const formRef = useRef(null);
-  const [spinning, setSpinning] = useState(false);
-  const name = fullAccessPath.split('.').at(-1);
-  const parentPath = fullAccessPath.slice(0, -(name.length + 1));
-
-  useEffect(() => {
-    renderCount.current++;
-    let message: string;
-
-    if (runningTask === null) {
-      message = `${fullAccessPath} task was stopped.`;
-    } else {
-      message = `${fullAccessPath} was started.`;
-    }
-    addNotification(message);
-    setSpinning(false);
-  }, [props.value]);
-
-  const execute = async (event: React.FormEvent) => {
-    event.preventDefault();
-    let method_name: string;
-
-    if (runningTask !== undefined && runningTask !== null) {
-      method_name = `stop_${name}`;
-    } else {
-      method_name = `start_${name}`;
-    }
-
-    const accessPath = [parentPath, method_name].filter((element) => element).join('.');
-    setSpinning(true);
-    runMethod(accessPath);
-  };
-
-  return (
-    <div className="component asyncMethodComponent" id={id}>
-      {process.env.NODE_ENV === 'development' && (
-        <div>Render count: {renderCount.current}</div>
-      )}
-      <Form onSubmit={execute} ref={formRef}>
-        <InputGroup>
-          <InputGroup.Text>
-            {displayName}
-            <DocStringComponent docString={docString} />
-          </InputGroup.Text>
-          <Button id={`button-${id}`} type="submit">
-            {spinning ? (
-              <Spinner size="sm" role="status" aria-hidden="true" />
-            ) : runningTask === 'RUNNING' ? (
-              'Stop '
-            ) : (
-              'Start '
-            )}
-          </Button>
-        </InputGroup>
-      </Form>
-    </div>
-  );
-});

frontend/src/components/ButtonComponent.tsx

@@ -1,20 +1,21 @@
-import React, { useEffect, useRef } from 'react';
-import { ToggleButton } from 'react-bootstrap';
-import { DocStringComponent } from './DocStringComponent';
-import { SerializedValue } from './GenericComponent';
-import { LevelName } from './NotificationsComponent';
+import React, { useEffect } from "react";
+import { ToggleButton } from "react-bootstrap";
+import { DocStringComponent } from "./DocStringComponent";
+import { LevelName } from "./NotificationsComponent";
+import { SerializedObject } from "../types/SerializedObject";
+import useRenderCount from "../hooks/useRenderCount";
 
-type ButtonComponentProps = {
+interface ButtonComponentProps {
   fullAccessPath: string;
   value: boolean;
   readOnly: boolean;
-  docString: string;
+  docString: string | null;
   mapping?: [string, string]; // Enforce a tuple of two strings
   addNotification: (message: string, levelname?: LevelName) => void;
-  changeCallback?: (value: SerializedValue, callback?: (ack: unknown) => void) => void;
+  changeCallback?: (value: SerializedObject, callback?: (ack: unknown) => void) => void;
   displayName: string;
   id: string;
-};
+}
 
 export const ButtonComponent = React.memo((props: ButtonComponentProps) => {
   const {
@@ -25,15 +26,11 @@ export const ButtonComponent = React.memo((props: ButtonComponentProps) => {
     addNotification,
     changeCallback = () => {},
     displayName,
-    id
+    id,
   } = props;
   // const buttonName = props.mapping ? (value ? props.mapping[0] : props.mapping[1]) : name;
 
-  const renderCount = useRef(0);
-
-  useEffect(() => {
-    renderCount.current++;
-  });
+  const renderCount = useRenderCount();
 
   useEffect(() => {
     addNotification(`${fullAccessPath} changed to ${value}.`);
@@ -41,24 +38,22 @@ export const ButtonComponent = React.memo((props: ButtonComponentProps) => {
 
   const setChecked = (checked: boolean) => {
     changeCallback({
-      type: 'bool',
+      type: "bool",
       value: checked,
       full_access_path: fullAccessPath,
       readonly: readOnly,
-      doc: docString
+      doc: docString,
     });
   };
 
   return (
-    <div className={'component buttonComponent'} id={id}>
-      {process.env.NODE_ENV === 'development' && (
-        <div>Render count: {renderCount.current}</div>
-      )}
+    <div className={"component buttonComponent"} id={id}>
+      {process.env.NODE_ENV === "development" && <div>Render count: {renderCount}</div>}
 
       <ToggleButton
         id={`toggle-check-${id}`}
         type="checkbox"
-        variant={value ? 'success' : 'secondary'}
+        variant={value ? "success" : "secondary"}
         checked={value}
         value={displayName}
         disabled={readOnly}
@@ -69,3 +64,5 @@ export const ButtonComponent = React.memo((props: ButtonComponentProps) => {
     </div>
   );
 });
+
+ButtonComponent.displayName = "ButtonComponent";

frontend/src/components/ConnectionToast.tsx

@@ -1,9 +1,9 @@
-import React, { useEffect, useState } from 'react';
-import { Toast, Button, ToastContainer } from 'react-bootstrap';
+import React, { useEffect, useState } from "react";
+import { Toast, Button, ToastContainer } from "react-bootstrap";
 
-type ConnectionToastProps = {
+interface ConnectionToastProps {
   connectionStatus: string;
-};
+}
 
 /**
  * ConnectionToast Component
@@ -36,31 +36,31 @@ export const ConnectionToast = React.memo(
       delay: number | undefined;
     } => {
       switch (connectionStatus) {
-        case 'connecting':
+        case "connecting":
           return {
-            message: 'Connecting...',
-            bg: 'info',
-            delay: undefined
+            message: "Connecting...",
+            bg: "info",
+            delay: undefined,
           };
-        case 'connected':
-          return { message: 'Connected', bg: 'success', delay: 1000 };
-        case 'disconnected':
+        case "connected":
+          return { message: "Connected", bg: "success", delay: 1000 };
+        case "disconnected":
           return {
-            message: 'Disconnected',
-            bg: 'danger',
-            delay: undefined
+            message: "Disconnected",
+            bg: "danger",
+            delay: undefined,
           };
-        case 'reconnecting':
+        case "reconnecting":
           return {
-            message: 'Reconnecting...',
-            bg: 'info',
-            delay: undefined
+            message: "Reconnecting...",
+            bg: "info",
+            delay: undefined,
           };
         default:
           return {
-            message: '',
-            bg: 'info',
-            delay: undefined
+            message: "",
+            bg: "info",
+            delay: undefined,
           };
       }
     };
@@ -82,5 +82,7 @@ export const ConnectionToast = React.memo(
         </Toast>
       </ToastContainer>
     );
-  }
+  },
 );
+
+ConnectionToast.displayName = "ConnectionToast";

frontend/src/components/DataServiceComponent.tsx

@@ -1,36 +1,41 @@
-import { useState } from 'react';
-import React from 'react';
-import { Card, Collapse } from 'react-bootstrap';
-import { ChevronDown, ChevronRight } from 'react-bootstrap-icons';
-import { SerializedValue, GenericComponent } from './GenericComponent';
-import { LevelName } from './NotificationsComponent';
+import React from "react";
+import { Card, Collapse } from "react-bootstrap";
+import { ChevronDown, ChevronRight } from "react-bootstrap-icons";
+import { GenericComponent } from "./GenericComponent";
+import { LevelName } from "./NotificationsComponent";
+import { SerializedObject } from "../types/SerializedObject";
+import useLocalStorage from "../hooks/useLocalStorage";
+import useSortedEntries from "../hooks/useSortedEntries";
 
-type DataServiceProps = {
+interface DataServiceProps {
   props: DataServiceJSON;
   isInstantUpdate: boolean;
   addNotification: (message: string, levelname?: LevelName) => void;
   displayName: string;
   id: string;
-};
+}
 
-export type DataServiceJSON = Record<string, SerializedValue>;
+export type DataServiceJSON = Record<string, SerializedObject>;
 
 export const DataServiceComponent = React.memo(
   ({ props, isInstantUpdate, addNotification, displayName, id }: DataServiceProps) => {
-    const [open, setOpen] = useState(true);
+    // Retrieve the initial state from localStorage, default to true if not found
+    const [open, setOpen] = useLocalStorage(`dataServiceComponent-${id}-open`, true);
 
-    if (displayName !== '') {
+    const sortedEntries = useSortedEntries(props);
+
+    if (displayName !== "") {
       return (
         <div className="component dataServiceComponent" id={id}>
           <Card>
-            <Card.Header onClick={() => setOpen(!open)} style={{ cursor: 'pointer' }}>
+            <Card.Header onClick={() => setOpen(!open)} style={{ cursor: "pointer" }}>
               {displayName} {open ? <ChevronDown /> : <ChevronRight />}
             </Card.Header>
             <Collapse in={open}>
               <Card.Body>
-                {Object.entries(props).map(([key, value]) => (
+                {sortedEntries.map((value) => (
                   <GenericComponent
-                    key={key}
+                    key={value.full_access_path}
                     attribute={value}
                     isInstantUpdate={isInstantUpdate}
                     addNotification={addNotification}
@@ -44,9 +49,9 @@ export const DataServiceComponent = React.memo(
     } else {
       return (
         <div className="component dataServiceComponent" id={id}>
-          {Object.entries(props).map(([key, value]) => (
+          {sortedEntries.map((value) => (
             <GenericComponent
-              key={key}
+              key={value.full_access_path}
               attribute={value}
               isInstantUpdate={isInstantUpdate}
               addNotification={addNotification}
@@ -55,5 +60,7 @@ export const DataServiceComponent = React.memo(
         </div>
       );
     }
-  }
+  },
 );
+
+DataServiceComponent.displayName = "DataServiceComponent";

frontend/src/components/DeviceConnection.tsx

@@ -1,16 +1,16 @@
-import React from 'react';
-import { LevelName } from './NotificationsComponent';
-import { DataServiceComponent, DataServiceJSON } from './DataServiceComponent';
-import { MethodComponent } from './MethodComponent';
+import React from "react";
+import { LevelName } from "./NotificationsComponent";
+import { DataServiceComponent, DataServiceJSON } from "./DataServiceComponent";
+import { MethodComponent } from "./MethodComponent";
 
-type DeviceConnectionProps = {
+interface DeviceConnectionProps {
   fullAccessPath: string;
   props: DataServiceJSON;
   isInstantUpdate: boolean;
   addNotification: (message: string, levelname?: LevelName) => void;
   displayName: string;
   id: string;
-};
+}
 
 export const DeviceConnectionComponent = React.memo(
   ({
@@ -19,7 +19,7 @@ export const DeviceConnectionComponent = React.memo(
     isInstantUpdate,
     addNotification,
     displayName,
-    id
+    id,
   }: DeviceConnectionProps) => {
     const { connected, connect, ...updatedProps } = props;
     const connectedVal = connected.value;
@@ -29,14 +29,14 @@ export const DeviceConnectionComponent = React.memo(
         {!connectedVal && (
           <div className="overlayContent">
             <div>
-              {displayName != '' ? displayName : 'Device'} is currently not available!
+              {displayName != "" ? displayName : "Device"} is currently not available!
             </div>
             <MethodComponent
               fullAccessPath={`${fullAccessPath}.connect`}
               docString={connect.doc}
               addNotification={addNotification}
-              displayName={'reconnect'}
-              id={id + '-connect'}
+              displayName={"reconnect"}
+              id={id + "-connect"}
               render={true}
             />
           </div>
@@ -50,5 +50,7 @@ export const DeviceConnectionComponent = React.memo(
         />
       </div>
     );
-  }
+  },
 );
+
+DeviceConnectionComponent.displayName = "DeviceConnectionComponent";

frontend/src/components/DictComponent.tsx

@@ -1,33 +1,30 @@
-import React, { useEffect, useRef } from 'react';
-import { DocStringComponent } from './DocStringComponent';
-import { SerializedValue, GenericComponent } from './GenericComponent';
-import { LevelName } from './NotificationsComponent';
+import React from "react";
+import { DocStringComponent } from "./DocStringComponent";
+import { GenericComponent } from "./GenericComponent";
+import { LevelName } from "./NotificationsComponent";
+import { SerializedObject } from "../types/SerializedObject";
+import useRenderCount from "../hooks/useRenderCount";
+import useSortedEntries from "../hooks/useSortedEntries";
 
-type DictComponentProps = {
-  value: Record<string, SerializedValue>;
-  docString: string;
+interface DictComponentProps {
+  value: Record<string, SerializedObject>;
+  docString: string | null;
   isInstantUpdate: boolean;
   addNotification: (message: string, levelname?: LevelName) => void;
   id: string;
-};
+}
 
 export const DictComponent = React.memo((props: DictComponentProps) => {
-  const { value, docString, isInstantUpdate, addNotification, id } = props;
+  const { docString, isInstantUpdate, addNotification, id } = props;
 
-  const renderCount = useRef(0);
-  const valueArray = Object.values(value);
-
-  useEffect(() => {
-    renderCount.current++;
-  }, [props]);
+  const sortedEntries = useSortedEntries(props.value);
+  const renderCount = useRenderCount();
 
   return (
-    <div className={'listComponent'} id={id}>
-      {process.env.NODE_ENV === 'development' && (
-        <div>Render count: {renderCount.current}</div>
-      )}
+    <div className={"listComponent"} id={id}>
+      {process.env.NODE_ENV === "development" && <div>Render count: {renderCount}</div>}
       <DocStringComponent docString={docString} />
-      {valueArray.map((item) => {
+      {sortedEntries.map((item) => {
         return (
           <GenericComponent
             key={item.full_access_path}
@@ -40,3 +37,5 @@ export const DictComponent = React.memo((props: DictComponentProps) => {
     </div>
   );
 });
+
+DictComponent.displayName = "DictComponent";

frontend/src/components/DocStringComponent.tsx

@@ -1,9 +1,9 @@
-import { Badge, Tooltip, OverlayTrigger } from 'react-bootstrap';
-import React from 'react';
+import { Badge, Tooltip, OverlayTrigger } from "react-bootstrap";
+import React from "react";
 
-type DocStringProps = {
-  docString?: string;
-};
+interface DocStringProps {
+  docString?: string | null;
+}
 
 export const DocStringComponent = React.memo((props: DocStringProps) => {
   const { docString } = props;
@@ -21,3 +21,5 @@ export const DocStringComponent = React.memo((props: DocStringProps) => {
     </OverlayTrigger>
   );
 });
+
+DocStringComponent.displayName = "DocStringComponent";

frontend/src/components/EnumComponent.tsx

@@ -1,64 +1,40 @@
-import React, { useEffect, useRef, useState } from 'react';
-import { InputGroup, Form, Row, Col } from 'react-bootstrap';
-import { DocStringComponent } from './DocStringComponent';
-import { SerializedValue } from './GenericComponent';
-import { LevelName } from './NotificationsComponent';
+import React, { useEffect } from "react";
+import { InputGroup, Form, Row, Col } from "react-bootstrap";
+import { DocStringComponent } from "./DocStringComponent";
+import { LevelName } from "./NotificationsComponent";
+import { SerializedObject, SerializedEnum } from "../types/SerializedObject";
+import { propsAreEqual } from "../utils/propsAreEqual";
+import useRenderCount from "../hooks/useRenderCount";
 
-export type EnumSerialization = {
-  type: 'Enum' | 'ColouredEnum';
-  full_access_path: string;
-  name: string;
-  value: string;
-  readonly: boolean;
-  doc?: string | null;
-  enum: Record<string, string>;
-};
-
-type EnumComponentProps = {
-  attribute: EnumSerialization;
+interface EnumComponentProps extends SerializedEnum {
   addNotification: (message: string, levelname?: LevelName) => void;
   displayName: string;
   id: string;
-  changeCallback?: (value: SerializedValue, callback?: (ack: unknown) => void) => void;
-};
+  changeCallback: (value: SerializedObject, callback?: (ack: unknown) => void) => void;
+}
 
 export const EnumComponent = React.memo((props: EnumComponentProps) => {
-  const { attribute, addNotification, displayName, id } = props;
   const {
-    full_access_path: fullAccessPath,
+    addNotification,
+    displayName,
+    id,
     value,
-    doc: docString,
+    full_access_path: fullAccessPath,
     enum: enumDict,
-    readonly: readOnly
-  } = attribute;
+    doc: docString,
+    readonly: readOnly,
+    changeCallback,
+  } = props;
 
-  let { changeCallback } = props;
-  if (changeCallback === undefined) {
-    changeCallback = (value: SerializedValue) => {
-      setEnumValue(() => {
-        return String(value.value);
-      });
-    };
-  }
-  const renderCount = useRef(0);
-  const [enumValue, setEnumValue] = useState(value);
+  const renderCount = useRenderCount();
 
   useEffect(() => {
-    renderCount.current++;
-  });
-
-  useEffect(() => {
-    setEnumValue(() => {
-      return value;
-    });
     addNotification(`${fullAccessPath} changed to ${value}.`);
   }, [value]);
 
   return (
-    <div className={'component enumComponent'} id={id}>
-      {process.env.NODE_ENV === 'development' && (
-        <div>Render count: {renderCount.current}</div>
-      )}
+    <div className={"component enumComponent"} id={id}>
+      {process.env.NODE_ENV === "development" && <div>Render count: {renderCount}</div>}
       <Row>
         <Col className="d-flex align-items-center">
           <InputGroup.Text>
@@ -70,11 +46,9 @@ export const EnumComponent = React.memo((props: EnumComponentProps) => {
             // Display the Form.Control when readOnly is true
             <Form.Control
               style={
-                attribute.type == 'ColouredEnum'
-                  ? { backgroundColor: enumDict[enumValue] }
-                  : {}
+                props.type == "ColouredEnum" ? { backgroundColor: enumDict[value] } : {}
               }
-              value={attribute.type == 'ColouredEnum' ? enumValue : enumDict[enumValue]}
+              value={props.type == "ColouredEnum" ? value : enumDict[value]}
               name={fullAccessPath}
               disabled={true}
             />
@@ -82,27 +56,25 @@ export const EnumComponent = React.memo((props: EnumComponentProps) => {
             // Display the Form.Select when readOnly is false
             <Form.Select
               aria-label="example-select"
-              value={enumValue}
+              value={value}
               name={fullAccessPath}
               style={
-                attribute.type == 'ColouredEnum'
-                  ? { backgroundColor: enumDict[enumValue] }
-                  : {}
+                props.type == "ColouredEnum" ? { backgroundColor: enumDict[value] } : {}
               }
               onChange={(event) =>
                 changeCallback({
-                  type: attribute.type,
-                  name: attribute.name,
+                  type: props.type,
+                  name: props.name,
                   enum: enumDict,
                   value: event.target.value,
                   full_access_path: fullAccessPath,
-                  readonly: attribute.readonly,
-                  doc: attribute.doc
+                  readonly: props.readonly,
+                  doc: props.doc,
                 })
               }>
               {Object.entries(enumDict).map(([key, val]) => (
                 <option key={key} value={key}>
-                  {attribute.type == 'ColouredEnum' ? key : val}
+                  {props.type == "ColouredEnum" ? key : val}
                 </option>
               ))}
             </Form.Select>
@@ -111,4 +83,6 @@ export const EnumComponent = React.memo((props: EnumComponentProps) => {
       </Row>
     </div>
   );
-});
+}, propsAreEqual);
+
+EnumComponent.displayName = "EnumComponent";

frontend/src/components/GenericComponent.tsx

@@ -1,62 +1,34 @@
-import React, { useContext } from 'react';
-import { ButtonComponent } from './ButtonComponent';
-import { NumberComponent } from './NumberComponent';
-import { SliderComponent } from './SliderComponent';
-import { EnumComponent, EnumSerialization } from './EnumComponent';
-import { MethodComponent } from './MethodComponent';
-import { AsyncMethodComponent } from './AsyncMethodComponent';
-import { StringComponent } from './StringComponent';
-import { ListComponent } from './ListComponent';
-import { DataServiceComponent, DataServiceJSON } from './DataServiceComponent';
-import { DeviceConnectionComponent } from './DeviceConnection';
-import { ImageComponent } from './ImageComponent';
-import { LevelName } from './NotificationsComponent';
-import { getIdFromFullAccessPath } from '../utils/stringUtils';
-import { WebSettingsContext } from '../WebSettings';
-import { updateValue } from '../socket';
-import { DictComponent } from './DictComponent';
-import { parseFullAccessPath } from '../utils/stateUtils';
+import React, { useContext } from "react";
+import { ButtonComponent } from "./ButtonComponent";
+import { NumberComponent, NumberObject } from "./NumberComponent";
+import { SliderComponent } from "./SliderComponent";
+import { EnumComponent } from "./EnumComponent";
+import { MethodComponent } from "./MethodComponent";
+import { StringComponent } from "./StringComponent";
+import { ListComponent } from "./ListComponent";
+import { DataServiceComponent, DataServiceJSON } from "./DataServiceComponent";
+import { DeviceConnectionComponent } from "./DeviceConnection";
+import { ImageComponent } from "./ImageComponent";
+import { LevelName } from "./NotificationsComponent";
+import { getIdFromFullAccessPath } from "../utils/stringUtils";
+import { WebSettingsContext } from "../WebSettings";
+import { updateValue } from "../socket";
+import { DictComponent } from "./DictComponent";
+import { parseFullAccessPath } from "../utils/stateUtils";
+import { SerializedEnum, SerializedObject } from "../types/SerializedObject";
+import { TaskComponent, TaskStatus } from "./TaskComponent";
 
-type AttributeType =
-  | 'str'
-  | 'bool'
-  | 'float'
-  | 'int'
-  | 'Quantity'
-  | 'None'
-  | 'list'
-  | 'dict'
-  | 'method'
-  | 'DataService'
-  | 'DeviceConnection'
-  | 'Enum'
-  | 'NumberSlider'
-  | 'Image'
-  | 'ColouredEnum';
-
-type ValueType = boolean | string | number | Record<string, unknown>;
-export type SerializedValue = {
-  type: AttributeType;
-  full_access_path: string;
-  name?: string;
-  value?: ValueType | ValueType[];
-  readonly: boolean;
-  doc?: string | null;
-  async?: boolean;
-  frontend_render?: boolean;
-  enum?: Record<string, string>;
-};
-type GenericComponentProps = {
-  attribute: SerializedValue;
+interface GenericComponentProps {
+  attribute: SerializedObject;
   isInstantUpdate: boolean;
   addNotification: (message: string, levelname?: LevelName) => void;
-};
+}
 
 const getPathFromPathParts = (pathParts: string[]): string => {
-  let path = '';
+  let path = "";
   for (const pathPart of pathParts) {
-    if (!pathPart.startsWith('[') && path !== '') {
-      path += '.';
+    if (!pathPart.startsWith("[") && path !== "") {
+      path += ".";
     }
     path += pathPart;
   }
@@ -69,13 +41,20 @@ const createDisplayNameFromAccessPath = (fullAccessPath: string): string => {
   for (let i = parsedFullAccessPath.length - 1; i >= 0; i--) {
     const item = parsedFullAccessPath[i];
     displayNameParts.unshift(item);
-    if (!item.startsWith('[')) {
+    if (!item.startsWith("[")) {
       break;
     }
   }
   return getPathFromPathParts(displayNameParts);
 };
 
+function changeCallback(
+  value: SerializedObject,
+  callback: (ack: unknown) => void = () => {},
+) {
+  updateValue(value, callback);
+}
+
 export const GenericComponent = React.memo(
   ({ attribute, isInstantUpdate, addNotification }: GenericComponentProps) => {
     const { full_access_path: fullAccessPath } = attribute;
@@ -93,14 +72,7 @@ export const GenericComponent = React.memo(
       }
     }
 
-    function changeCallback(
-      value: SerializedValue,
-      callback: (ack: unknown) => void = undefined
-    ) {
-      updateValue(value, callback);
-    }
-
-    if (attribute.type === 'bool') {
+    if (attribute.type === "bool") {
       return (
         <ButtonComponent
           fullAccessPath={fullAccessPath}
@@ -113,7 +85,7 @@ export const GenericComponent = React.memo(
           id={id}
         />
       );
-    } else if (attribute.type === 'float' || attribute.type === 'int') {
+    } else if (attribute.type === "float" || attribute.type === "int") {
       return (
         <NumberComponent
           type={attribute.type}
@@ -128,15 +100,15 @@ export const GenericComponent = React.memo(
           id={id}
         />
       );
-    } else if (attribute.type === 'Quantity') {
+    } else if (attribute.type === "Quantity") {
       return (
         <NumberComponent
           type="Quantity"
           fullAccessPath={fullAccessPath}
           docString={attribute.doc}
           readOnly={attribute.readonly}
-          value={Number(attribute.value['magnitude'])}
-          unit={attribute.value['unit']}
+          value={Number(attribute.value["magnitude"])}
+          unit={attribute.value["unit"]}
           isInstantUpdate={isInstantUpdate}
           addNotification={addNotification}
           changeCallback={changeCallback}
@@ -144,16 +116,16 @@ export const GenericComponent = React.memo(
           id={id}
         />
       );
-    } else if (attribute.type === 'NumberSlider') {
+    } else if (attribute.type === "NumberSlider") {
       return (
         <SliderComponent
           fullAccessPath={fullAccessPath}
-          docString={attribute.value['value'].doc}
+          docString={attribute.value["value"].doc}
           readOnly={attribute.readonly}
-          value={attribute.value['value']}
-          min={attribute.value['min']}
-          max={attribute.value['max']}
-          stepSize={attribute.value['step_size']}
+          value={attribute.value["value"] as NumberObject}
+          min={attribute.value["min"] as NumberObject}
+          max={attribute.value["max"] as NumberObject}
+          stepSize={attribute.value["step_size"] as NumberObject}
           isInstantUpdate={isInstantUpdate}
           addNotification={addNotification}
           changeCallback={changeCallback}
@@ -161,42 +133,28 @@ export const GenericComponent = React.memo(
           id={id}
         />
       );
-    } else if (attribute.type === 'Enum' || attribute.type === 'ColouredEnum') {
+    } else if (attribute.type === "Enum" || attribute.type === "ColouredEnum") {
       return (
         <EnumComponent
-          attribute={attribute as EnumSerialization}
+          {...(attribute as SerializedEnum)}
           addNotification={addNotification}
           changeCallback={changeCallback}
           displayName={displayName}
           id={id}
         />
       );
-    } else if (attribute.type === 'method') {
-      if (!attribute.async) {
-        return (
-          <MethodComponent
-            fullAccessPath={fullAccessPath}
-            docString={attribute.doc}
-            addNotification={addNotification}
-            displayName={displayName}
-            id={id}
-            render={attribute.frontend_render}
-          />
-        );
-      } else {
-        return (
-          <AsyncMethodComponent
-            fullAccessPath={fullAccessPath}
-            docString={attribute.doc}
-            value={attribute.value as 'RUNNING' | null}
-            addNotification={addNotification}
-            displayName={displayName}
-            id={id}
-            render={attribute.frontend_render}
-          />
-        );
-      }
-    } else if (attribute.type === 'str') {
+    } else if (attribute.type === "method") {
+      return (
+        <MethodComponent
+          fullAccessPath={fullAccessPath}
+          docString={attribute.doc}
+          addNotification={addNotification}
+          displayName={displayName}
+          id={id}
+          render={attribute.frontend_render}
+        />
+      );
+    } else if (attribute.type === "str") {
       return (
         <StringComponent
           fullAccessPath={fullAccessPath}
@@ -210,7 +168,18 @@ export const GenericComponent = React.memo(
           id={id}
         />
       );
-    } else if (attribute.type === 'DataService') {
+    } else if (attribute.type == "Task") {
+      return (
+        <TaskComponent
+          fullAccessPath={fullAccessPath}
+          docString={attribute.doc}
+          status={attribute.value["status"].value as TaskStatus}
+          addNotification={addNotification}
+          displayName={displayName}
+          id={id}
+        />
+      );
+    } else if (attribute.type === "DataService") {
       return (
         <DataServiceComponent
           props={attribute.value as DataServiceJSON}
@@ -220,7 +189,7 @@ export const GenericComponent = React.memo(
           id={id}
         />
       );
-    } else if (attribute.type === 'DeviceConnection') {
+    } else if (attribute.type === "DeviceConnection") {
       return (
         <DeviceConnectionComponent
           fullAccessPath={fullAccessPath}
@@ -231,41 +200,42 @@ export const GenericComponent = React.memo(
           id={id}
         />
       );
-    } else if (attribute.type === 'list') {
+    } else if (attribute.type === "list") {
       return (
         <ListComponent
-          value={attribute.value as SerializedValue[]}
+          value={attribute.value}
           docString={attribute.doc}
           isInstantUpdate={isInstantUpdate}
           addNotification={addNotification}
           id={id}
         />
       );
-    } else if (attribute.type === 'dict') {
+    } else if (attribute.type === "dict") {
       return (
         <DictComponent
-          value={attribute.value as Record<string, SerializedValue>}
+          value={attribute.value}
           docString={attribute.doc}
           isInstantUpdate={isInstantUpdate}
           addNotification={addNotification}
           id={id}
         />
       );
-    } else if (attribute.type === 'Image') {
+    } else if (attribute.type === "Image") {
       return (
         <ImageComponent
           fullAccessPath={fullAccessPath}
-          docString={attribute.value['value'].doc}
+          docString={attribute.value["value"].doc}
           displayName={displayName}
           id={id}
           addNotification={addNotification}
-          // Add any other specific props for the ImageComponent here
-          value={attribute.value['value']['value'] as string}
-          format={attribute.value['format']['value'] as string}
+          value={attribute.value["value"]["value"] as string}
+          format={attribute.value["format"]["value"] as string}
         />
       );
     } else {
       return <div key={fullAccessPath}>{fullAccessPath}</div>;
     }
-  }
+  },
 );
+
+GenericComponent.displayName = "GenericComponent";

frontend/src/components/ImageComponent.tsx

@@ -1,30 +1,27 @@
-import React, { useEffect, useRef, useState } from 'react';
-import { Card, Collapse, Image } from 'react-bootstrap';
-import { DocStringComponent } from './DocStringComponent';
-import { ChevronDown, ChevronRight } from 'react-bootstrap-icons';
-import { LevelName } from './NotificationsComponent';
+import React, { useEffect, useState } from "react";
+import { Card, Collapse, Image } from "react-bootstrap";
+import { DocStringComponent } from "./DocStringComponent";
+import { ChevronDown, ChevronRight } from "react-bootstrap-icons";
+import { LevelName } from "./NotificationsComponent";
+import useRenderCount from "../hooks/useRenderCount";
 
-type ImageComponentProps = {
+interface ImageComponentProps {
   fullAccessPath: string;
   value: string;
-  docString: string;
+  docString: string | null;
   format: string;
   addNotification: (message: string, levelname?: LevelName) => void;
   displayName: string;
   id: string;
-};
+}
 
 export const ImageComponent = React.memo((props: ImageComponentProps) => {
   const { fullAccessPath, value, docString, format, addNotification, displayName, id } =
     props;
 
-  const renderCount = useRef(0);
+  const renderCount = useRenderCount();
   const [open, setOpen] = useState(true);
 
-  useEffect(() => {
-    renderCount.current++;
-  });
-
   useEffect(() => {
     addNotification(`${fullAccessPath} changed.`);
   }, [props.value]);
@@ -34,7 +31,7 @@ export const ImageComponent = React.memo((props: ImageComponentProps) => {
       <Card>
         <Card.Header
           onClick={() => setOpen(!open)}
-          style={{ cursor: 'pointer' }} // Change cursor style on hover
+          style={{ cursor: "pointer" }} // Change cursor style on hover
         >
           {displayName}
           <DocStringComponent docString={docString} />
@@ -42,10 +39,10 @@ export const ImageComponent = React.memo((props: ImageComponentProps) => {
         </Card.Header>
         <Collapse in={open}>
           <Card.Body>
-            {process.env.NODE_ENV === 'development' && (
-              <p>Render count: {renderCount.current}</p>
+            {process.env.NODE_ENV === "development" && (
+              <p>Render count: {renderCount}</p>
             )}
-            {format === '' && value === '' ? (
+            {format === "" && value === "" ? (
               <p>No image set in the backend.</p>
             ) : (
               <Image src={`data:image/${format.toLowerCase()};base64,${value}`}></Image>
@@ -56,3 +53,5 @@ export const ImageComponent = React.memo((props: ImageComponentProps) => {
     </div>
   );
 });
+
+ImageComponent.displayName = "ImageComponent";

frontend/src/components/ListComponent.tsx

@@ -1,32 +1,31 @@
-import React, { useEffect, useRef } from 'react';
-import { DocStringComponent } from './DocStringComponent';
-import { SerializedValue, GenericComponent } from './GenericComponent';
-import { LevelName } from './NotificationsComponent';
+import React from "react";
+import { DocStringComponent } from "./DocStringComponent";
+import { GenericComponent } from "./GenericComponent";
+import { LevelName } from "./NotificationsComponent";
+import { SerializedObject } from "../types/SerializedObject";
+import useRenderCount from "../hooks/useRenderCount";
+import useSortedEntries from "../hooks/useSortedEntries";
 
-type ListComponentProps = {
-  value: SerializedValue[];
-  docString: string;
+interface ListComponentProps {
+  value: SerializedObject[];
+  docString: string | null;
   isInstantUpdate: boolean;
   addNotification: (message: string, levelname?: LevelName) => void;
   id: string;
-};
+}
 
 export const ListComponent = React.memo((props: ListComponentProps) => {
-  const { value, docString, isInstantUpdate, addNotification, id } = props;
+  const { docString, isInstantUpdate, addNotification, id } = props;
 
-  const renderCount = useRef(0);
+  const sortedEntries = useSortedEntries(props.value);
 
-  useEffect(() => {
-    renderCount.current++;
-  }, [props]);
+  const renderCount = useRenderCount();
 
   return (
-    <div className={'listComponent'} id={id}>
-      {process.env.NODE_ENV === 'development' && (
-        <div>Render count: {renderCount.current}</div>
-      )}
+    <div className={"listComponent"} id={id}>
+      {process.env.NODE_ENV === "development" && <div>Render count: {renderCount}</div>}
       <DocStringComponent docString={docString} />
-      {value.map((item) => {
+      {sortedEntries.map((item) => {
         return (
           <GenericComponent
             key={item.full_access_path}
@@ -39,3 +38,5 @@ export const ListComponent = React.memo((props: ListComponentProps) => {
     </div>
   );
 });
+
+ListComponent.displayName = "ListComponent";

frontend/src/components/MethodComponent.tsx

@@ -1,17 +1,19 @@
-import React, { useEffect, useRef } from 'react';
-import { runMethod } from '../socket';
-import { Button, Form } from 'react-bootstrap';
-import { DocStringComponent } from './DocStringComponent';
-import { LevelName } from './NotificationsComponent';
+import React, { useRef } from "react";
+import { runMethod } from "../socket";
+import { Button, Form } from "react-bootstrap";
+import { DocStringComponent } from "./DocStringComponent";
+import { LevelName } from "./NotificationsComponent";
+import useRenderCount from "../hooks/useRenderCount";
+import { propsAreEqual } from "../utils/propsAreEqual";
 
-type MethodProps = {
+interface MethodProps {
   fullAccessPath: string;
-  docString?: string;
+  docString: string | null;
   addNotification: (message: string, levelname?: LevelName) => void;
   displayName: string;
   id: string;
   render: boolean;
-};
+}
 
 export const MethodComponent = React.memo((props: MethodProps) => {
   const { fullAccessPath, docString, addNotification, displayName, id } = props;
@@ -21,7 +23,7 @@ export const MethodComponent = React.memo((props: MethodProps) => {
     return null;
   }
 
-  const renderCount = useRef(0);
+  const renderCount = useRenderCount();
   const formRef = useRef(null);
 
   const triggerNotification = () => {
@@ -37,15 +39,9 @@ export const MethodComponent = React.memo((props: MethodProps) => {
     triggerNotification();
   };
 
-  useEffect(() => {
-    renderCount.current++;
-  });
-
   return (
     <div className="component methodComponent" id={id}>
-      {process.env.NODE_ENV === 'development' && (
-        <div>Render count: {renderCount.current}</div>
-      )}
+      {process.env.NODE_ENV === "development" && <div>Render count: {renderCount}</div>}
       <Form onSubmit={execute} ref={formRef}>
         <Button className="component" variant="primary" type="submit">
           {`${displayName} `}
@@ -54,4 +50,6 @@ export const MethodComponent = React.memo((props: MethodProps) => {
       </Form>
     </div>
   );
-});
+}, propsAreEqual);
+
+MethodComponent.displayName = "MethodComponent";

frontend/src/components/NotificationsComponent.tsx

@@ -1,19 +1,19 @@
-import React from 'react';
-import { ToastContainer, Toast } from 'react-bootstrap';
+import React from "react";
+import { ToastContainer, Toast } from "react-bootstrap";
 
-export type LevelName = 'CRITICAL' | 'ERROR' | 'WARNING' | 'INFO' | 'DEBUG';
-export type Notification = {
+export type LevelName = "CRITICAL" | "ERROR" | "WARNING" | "INFO" | "DEBUG";
+export interface Notification {
   id: number;
   timeStamp: string;
   message: string;
   levelname: LevelName;
-};
+}
 
-type NotificationProps = {
+interface NotificationProps {
   showNotification: boolean;
   notifications: Notification[];
   removeNotificationById: (id: number) => void;
-};
+}
 
 export const Notifications = React.memo((props: NotificationProps) => {
   const { showNotification, notifications, removeNotificationById } = props;
@@ -23,10 +23,10 @@ export const Notifications = React.memo((props: NotificationProps) => {
       {notifications.map((notification) => {
         // Determine if the toast should be shown
         const shouldShow =
-          notification.levelname === 'ERROR' ||
-          notification.levelname === 'CRITICAL' ||
+          notification.levelname === "ERROR" ||
+          notification.levelname === "CRITICAL" ||
           (showNotification &&
-            ['WARNING', 'INFO', 'DEBUG'].includes(notification.levelname));
+            ["WARNING", "INFO", "DEBUG"].includes(notification.levelname));
 
         if (!shouldShow) {
           return null;
@@ -34,31 +34,31 @@ export const Notifications = React.memo((props: NotificationProps) => {
 
         return (
           <Toast
-            className={notification.levelname.toLowerCase() + 'Toast'}
+            className={notification.levelname.toLowerCase() + "Toast"}
             key={notification.id}
             onClose={() => removeNotificationById(notification.id)}
             onClick={() => removeNotificationById(notification.id)}
             onMouseLeave={() => {
-              if (notification.levelname !== 'ERROR') {
+              if (notification.levelname !== "ERROR") {
                 removeNotificationById(notification.id);
               }
             }}
             show={true}
             autohide={
-              notification.levelname === 'WARNING' ||
-              notification.levelname === 'INFO' ||
-              notification.levelname === 'DEBUG'
+              notification.levelname === "WARNING" ||
+              notification.levelname === "INFO" ||
+              notification.levelname === "DEBUG"
             }
             delay={
-              notification.levelname === 'WARNING' ||
-              notification.levelname === 'INFO' ||
-              notification.levelname === 'DEBUG'
+              notification.levelname === "WARNING" ||
+              notification.levelname === "INFO" ||
+              notification.levelname === "DEBUG"
                 ? 2000
                 : undefined
             }>
             <Toast.Header
               closeButton={false}
-              className={notification.levelname.toLowerCase() + 'Toast text-right'}>
+              className={notification.levelname.toLowerCase() + "Toast text-right"}>
               <strong className="me-auto">{notification.levelname}</strong>
               <small>{notification.timeStamp}</small>
             </Toast.Header>
@@ -69,3 +69,5 @@ export const Notifications = React.memo((props: NotificationProps) => {
     </ToastContainer>
   );
 });
+
+Notifications.displayName = "Notifications";

frontend/src/components/NumberComponent.tsx

@@ -1,59 +1,58 @@
-import React, { useEffect, useState, useRef } from 'react';
-import { Form, InputGroup } from 'react-bootstrap';
-import { DocStringComponent } from './DocStringComponent';
-import '../App.css';
-import { LevelName } from './NotificationsComponent';
-import { SerializedValue } from './GenericComponent';
+import React, { useEffect, useState } from "react";
+import { Form, InputGroup } from "react-bootstrap";
+import { DocStringComponent } from "./DocStringComponent";
+import "../App.css";
+import { LevelName } from "./NotificationsComponent";
+import { SerializedObject } from "../types/SerializedObject";
+import { QuantityMap } from "../types/QuantityMap";
+import useRenderCount from "../hooks/useRenderCount";
 
 // TODO: add button functionality
 
-export type QuantityObject = {
-  type: 'Quantity';
+export interface QuantityObject {
+  type: "Quantity";
   readonly: boolean;
-  value: {
-    magnitude: number;
-    unit: string;
-  };
-  doc?: string;
-};
-export type IntObject = {
-  type: 'int';
+  value: QuantityMap;
+  doc: string | null;
+}
+export interface IntObject {
+  type: "int";
   readonly: boolean;
   value: number;
-  doc?: string;
-};
-export type FloatObject = {
-  type: 'float';
+  doc: string | null;
+}
+export interface FloatObject {
+  type: "float";
   readonly: boolean;
   value: number;
-  doc?: string;
-};
+  doc: string | null;
+}
 export type NumberObject = IntObject | FloatObject | QuantityObject;
 
-type NumberComponentProps = {
-  type: 'float' | 'int' | 'Quantity';
+interface NumberComponentProps {
+  type: "float" | "int" | "Quantity";
   fullAccessPath: string;
   value: number;
   readOnly: boolean;
-  docString: string;
+  docString: string | null;
   isInstantUpdate: boolean;
   unit?: string;
   addNotification: (message: string, levelname?: LevelName) => void;
-  changeCallback?: (value: SerializedValue, callback?: (ack: unknown) => void) => void;
+  changeCallback?: (value: SerializedObject, callback?: (ack: unknown) => void) => void;
   displayName?: string;
   id: string;
-};
+}
 
 // TODO: highlight the digit that is being changed by setting both selectionStart and
 // selectionEnd
 const handleArrowKey = (
   key: string,
   value: string,
-  selectionStart: number
+  selectionStart: number,
   // selectionEnd: number
 ) => {
   // Split the input value into the integer part and decimal part
-  const parts = value.split('.');
+  const parts = value.split(".");
   const beforeDecimalCount = parts[0].length; // Count digits before the decimal
   const afterDecimalCount = parts[1] ? parts[1].length : 0; // Count digits after the decimal
 
@@ -69,14 +68,14 @@ const handleArrowKey = (
 
   // Convert the input value to a number, increment or decrement it based on the
   // arrow key
-  const numValue = parseFloat(value) + (key === 'ArrowUp' ? increment : -increment);
+  const numValue = parseFloat(value) + (key === "ArrowUp" ? increment : -increment);
 
   // Convert the resulting number to a string, maintaining the same number of digits
   // after the decimal
   const newValue = numValue.toFixed(afterDecimalCount);
 
   // Check if the length of the integer part of the number string has in-/decreased
-  const newBeforeDecimalCount = newValue.split('.')[0].length;
+  const newBeforeDecimalCount = newValue.split(".")[0].length;
   if (newBeforeDecimalCount > beforeDecimalCount) {
     // Move the cursor one position to the right
     selectionStart += 1;
@@ -90,18 +89,18 @@ const handleArrowKey = (
 const handleBackspaceKey = (
   value: string,
   selectionStart: number,
-  selectionEnd: number
+  selectionEnd: number,
 ) => {
   if (selectionEnd > selectionStart) {
     // If there is a selection, delete all characters in the selection
     return {
       value: value.slice(0, selectionStart) + value.slice(selectionEnd),
-      selectionStart
+      selectionStart,
     };
   } else if (selectionStart > 0) {
     return {
       value: value.slice(0, selectionStart - 1) + value.slice(selectionStart),
-      selectionStart: selectionStart - 1
+      selectionStart: selectionStart - 1,
     };
   }
   return { value, selectionStart };
@@ -110,18 +109,18 @@ const handleBackspaceKey = (
 const handleDeleteKey = (
   value: string,
   selectionStart: number,
-  selectionEnd: number
+  selectionEnd: number,
 ) => {
   if (selectionEnd > selectionStart) {
     // If there is a selection, delete all characters in the selection
     return {
       value: value.slice(0, selectionStart) + value.slice(selectionEnd),
-      selectionStart
+      selectionStart,
     };
   } else if (selectionStart < value.length) {
     return {
       value: value.slice(0, selectionStart) + value.slice(selectionStart + 1),
-      selectionStart
+      selectionStart,
     };
   }
   return { value, selectionStart };
@@ -131,23 +130,45 @@ const handleNumericKey = (
   key: string,
   value: string,
   selectionStart: number,
-  selectionEnd: number
+  selectionEnd: number,
 ) => {
+  let newValue = value;
+
   // Check if a number key or a decimal point key is pressed
-  if (key === '.' && value.includes('.')) {
+  if (key === "." && value.includes(".")) {
     // Check if value already contains a decimal. If so, ignore input.
-    console.warn('Invalid input! Ignoring...');
+    console.warn("Invalid input! Ignoring...");
     return { value, selectionStart };
   }
 
-  let newValue = value;
+  // Handle minus sign input
+  if (key === "-") {
+    if (selectionStart === 0 && selectionEnd > selectionStart) {
+      // Replace selection with minus if selection starts at 0
+      newValue = "-" + value.slice(selectionEnd);
+      selectionStart = 1;
+    } else if (selectionStart === 0 && !value.startsWith("-")) {
+      // Add minus at the beginning if it doesn't exist
+      newValue = "-" + value;
+      selectionStart = 1;
+    } else if (
+      (selectionStart === 0 || selectionStart === 1) &&
+      value.startsWith("-")
+    ) {
+      // Remove minus if it exists
+      newValue = value.slice(1);
+      selectionStart = 0;
+    }
+
+    return { value: newValue, selectionStart };
+  }
 
   // Add the new key at the cursor's position
   if (selectionEnd > selectionStart) {
     // If there is a selection, replace it with the key
     newValue = value.slice(0, selectionStart) + key + value.slice(selectionEnd);
   } else {
-    // otherwise, append the key after the selection start
+    // Otherwise, insert the key at the cursor position
     newValue = value.slice(0, selectionStart) + key + value.slice(selectionStart);
   }
 
@@ -166,98 +187,100 @@ export const NumberComponent = React.memo((props: NumberComponentProps) => {
     addNotification,
     changeCallback = () => {},
     displayName,
-    id
+    id,
   } = props;
 
   // Create a state for the cursor position
-  const [cursorPosition, setCursorPosition] = useState(null);
+  const [cursorPosition, setCursorPosition] = useState<number | null>(null);
   // Create a state for the input string
   const [inputString, setInputString] = useState(value.toString());
-  const renderCount = useRef(0);
+  const renderCount = useRenderCount();
 
-  const handleKeyDown = (event) => {
+  const handleKeyDown = (event: React.KeyboardEvent<HTMLInputElement>) => {
     const { key, target } = event;
+
+    // Typecast
+    const inputTarget = target as HTMLInputElement;
     if (
-      key === 'F1' ||
-      key === 'F5' ||
-      key === 'F12' ||
-      key === 'Tab' ||
-      key === 'ArrowRight' ||
-      key === 'ArrowLeft'
+      key === "F1" ||
+      key === "F5" ||
+      key === "F12" ||
+      key === "Tab" ||
+      key === "ArrowRight" ||
+      key === "ArrowLeft"
     ) {
       return;
     }
     event.preventDefault();
 
     // Get the current input value and cursor position
-    const { value } = target;
-    let { selectionStart } = target;
-    const { selectionEnd } = target;
+    const { value } = inputTarget;
+    const selectionEnd = inputTarget.selectionEnd ?? 0;
+    let selectionStart = inputTarget.selectionStart ?? 0;
 
     let newValue: string = value;
-    if (event.ctrlKey && key === 'a') {
+    if (event.ctrlKey && key === "a") {
       // Select everything when pressing Ctrl + a
-      target.setSelectionRange(0, target.value.length);
+      inputTarget.setSelectionRange(0, value.length);
       return;
-    } else if (key === '-') {
-      if (selectionStart === 0 && !value.startsWith('-')) {
-        newValue = '-' + value;
-        selectionStart++;
-      } else if (value.startsWith('-') && selectionStart === 1) {
-        newValue = value.substring(1); // remove minus sign
-        selectionStart--;
-      } else {
-        return; // Ignore "-" pressed in other positions
-      }
-    } else if (!isNaN(key) && key !== ' ') {
+    } else if ((key >= "0" && key <= "9") || key === "-") {
       // Check if a number key or a decimal point key is pressed
       ({ value: newValue, selectionStart } = handleNumericKey(
         key,
         value,
         selectionStart,
-        selectionEnd
+        selectionEnd,
       ));
-    } else if (key === '.' && (type === 'float' || type === 'Quantity')) {
+    } else if (key === "." && (type === "float" || type === "Quantity")) {
       ({ value: newValue, selectionStart } = handleNumericKey(
         key,
         value,
         selectionStart,
-        selectionEnd
+        selectionEnd,
       ));
-    } else if (key === 'ArrowUp' || key === 'ArrowDown') {
+    } else if (key === "ArrowUp" || key === "ArrowDown") {
       ({ value: newValue, selectionStart } = handleArrowKey(
         key,
         value,
-        selectionStart
+        selectionStart,
         // selectionEnd
       ));
-    } else if (key === 'Backspace') {
+    } else if (key === "Backspace") {
       ({ value: newValue, selectionStart } = handleBackspaceKey(
         value,
         selectionStart,
-        selectionEnd
+        selectionEnd,
       ));
-    } else if (key === 'Delete') {
+    } else if (key === "Delete") {
       ({ value: newValue, selectionStart } = handleDeleteKey(
         value,
         selectionStart,
-        selectionEnd
+        selectionEnd,
       ));
-    } else if (key === 'Enter' && !isInstantUpdate) {
-      let updatedValue: number | Record<string, unknown> = Number(newValue);
-      if (type === 'Quantity') {
-        updatedValue = {
-          magnitude: Number(newValue),
-          unit: unit
+    } else if (key === "Enter" && !isInstantUpdate) {
+      let serializedObject: SerializedObject;
+      if (type === "Quantity") {
+        serializedObject = {
+          type: "Quantity",
+          value: {
+            magnitude: Number(newValue),
+            unit: unit,
+          } as QuantityMap,
+          full_access_path: fullAccessPath,
+          readonly: readOnly,
+          doc: docString,
+        };
+      } else {
+        serializedObject = {
+          type: type,
+          value: Number(newValue),
+          full_access_path: fullAccessPath,
+          readonly: readOnly,
+          doc: docString,
         };
       }
-      changeCallback({
-        type: type,
-        value: updatedValue,
-        full_access_path: fullAccessPath,
-        readonly: readOnly,
-        doc: docString
-      });
+
+      changeCallback(serializedObject);
       return;
     } else {
       console.debug(key);
@@ -266,20 +289,29 @@ export const NumberComponent = React.memo((props: NumberComponentProps) => {
 
     // Update the input value and maintain the cursor position
     if (isInstantUpdate) {
-      let updatedValue: number | Record<string, unknown> = Number(newValue);
-      if (type === 'Quantity') {
-        updatedValue = {
-          magnitude: Number(newValue),
-          unit: unit
+      let serializedObject: SerializedObject;
+      if (type === "Quantity") {
+        serializedObject = {
+          type: "Quantity",
+          value: {
+            magnitude: Number(newValue),
+            unit: unit,
+          } as QuantityMap,
+          full_access_path: fullAccessPath,
+          readonly: readOnly,
+          doc: docString,
+        };
+      } else {
+        serializedObject = {
+          type: type,
+          value: Number(newValue),
+          full_access_path: fullAccessPath,
+          readonly: readOnly,
+          doc: docString,
         };
       }
-      changeCallback({
-        type: type,
-        value: updatedValue,
-        full_access_path: fullAccessPath,
-        readonly: readOnly,
-        doc: docString
-      });
+
+      changeCallback(serializedObject);
     }
 
     setInputString(newValue);
@@ -291,26 +323,35 @@ export const NumberComponent = React.memo((props: NumberComponentProps) => {
   const handleBlur = () => {
     if (!isInstantUpdate) {
       // If not in "instant update" mode, emit an update when the input field loses focus
-      let updatedValue: number | Record<string, unknown> = Number(inputString);
-      if (type === 'Quantity') {
-        updatedValue = {
-          magnitude: Number(inputString),
-          unit: unit
+      let serializedObject: SerializedObject;
+      if (type === "Quantity") {
+        serializedObject = {
+          type: "Quantity",
+          value: {
+            magnitude: Number(inputString),
+            unit: unit,
+          } as QuantityMap,
+          full_access_path: fullAccessPath,
+          readonly: readOnly,
+          doc: docString,
+        };
+      } else {
+        serializedObject = {
+          type: type,
+          value: Number(inputString),
+          full_access_path: fullAccessPath,
+          readonly: readOnly,
+          doc: docString,
         };
       }
-      changeCallback({
-        type: type,
-        value: updatedValue,
-        full_access_path: fullAccessPath,
-        readonly: readOnly,
-        doc: docString
-      });
+
+      changeCallback(serializedObject);
     }
   };
   useEffect(() => {
     // Parse the input string to a number for comparison
     const numericInputString =
-      type === 'int' ? parseInt(inputString) : parseFloat(inputString);
+      type === "int" ? parseInt(inputString) : parseFloat(inputString);
     // Only update the inputString if it's different from the prop value
     if (value !== numericInputString) {
       setInputString(value.toString());
@@ -319,7 +360,7 @@ export const NumberComponent = React.memo((props: NumberComponentProps) => {
     // emitting notification
     let notificationMsg = `${fullAccessPath} changed to ${props.value}`;
     if (unit === undefined) {
-      notificationMsg += '.';
+      notificationMsg += ".";
     } else {
       notificationMsg += ` ${unit}.`;
     }
@@ -336,9 +377,7 @@ export const NumberComponent = React.memo((props: NumberComponentProps) => {
 
   return (
     <div className="component numberComponent" id={id}>
-      {process.env.NODE_ENV === 'development' && (
-        <div>Render count: {renderCount.current}</div>
-      )}
+      {process.env.NODE_ENV === "development" && <div>Render count: {renderCount}</div>}
       <InputGroup>
         {displayName && (
           <InputGroup.Text>
@@ -354,10 +393,12 @@ export const NumberComponent = React.memo((props: NumberComponentProps) => {
           name={id}
           onKeyDown={handleKeyDown}
           onBlur={handleBlur}
-          className={isInstantUpdate && !readOnly ? 'instantUpdate' : ''}
+          className={isInstantUpdate && !readOnly ? "instantUpdate" : ""}
         />
         {unit && <InputGroup.Text>{unit}</InputGroup.Text>}
       </InputGroup>
     </div>
   );
 });
+
+NumberComponent.displayName = "NumberComponent";

frontend/src/components/SliderComponent.tsx

@@ -1,28 +1,48 @@
-import React, { useEffect, useRef, useState } from 'react';
-import { InputGroup, Form, Row, Col, Collapse, ToggleButton } from 'react-bootstrap';
-import { DocStringComponent } from './DocStringComponent';
-import { Slider } from '@mui/material';
-import { NumberComponent, NumberObject } from './NumberComponent';
-import { LevelName } from './NotificationsComponent';
-import { SerializedValue } from './GenericComponent';
+import React, { useEffect, useState } from "react";
+import { InputGroup, Form, Row, Col, Collapse, ToggleButton } from "react-bootstrap";
+import { DocStringComponent } from "./DocStringComponent";
+import { Slider } from "@mui/material";
+import { NumberComponent, NumberObject } from "./NumberComponent";
+import { LevelName } from "./NotificationsComponent";
+import { SerializedObject } from "../types/SerializedObject";
+import { QuantityMap } from "../types/QuantityMap";
+import { propsAreEqual } from "../utils/propsAreEqual";
+import useRenderCount from "../hooks/useRenderCount";
 
-type SliderComponentProps = {
+interface SliderComponentProps {
   fullAccessPath: string;
   min: NumberObject;
   max: NumberObject;
   value: NumberObject;
   readOnly: boolean;
-  docString: string;
+  docString: string | null;
   stepSize: NumberObject;
   isInstantUpdate: boolean;
   addNotification: (message: string, levelname?: LevelName) => void;
-  changeCallback?: (value: SerializedValue, callback?: (ack: unknown) => void) => void;
+  changeCallback?: (value: SerializedObject, callback?: (ack: unknown) => void) => void;
   displayName: string;
   id: string;
+}
+
+const deconstructNumberDict = (
+  numberDict: NumberObject,
+): [number, boolean, string | undefined] => {
+  let numberMagnitude = 0;
+  let numberUnit: string | undefined = undefined;
+  const numberReadOnly = numberDict.readonly;
+
+  if (numberDict.type === "int" || numberDict.type === "float") {
+    numberMagnitude = numberDict.value;
+  } else if (numberDict.type === "Quantity") {
+    numberMagnitude = numberDict.value.magnitude;
+    numberUnit = numberDict.value.unit;
+  }
+
+  return [numberMagnitude, numberReadOnly, numberUnit];
 };
 
 export const SliderComponent = React.memo((props: SliderComponentProps) => {
-  const renderCount = useRef(0);
+  const renderCount = useRenderCount();
   const [open, setOpen] = useState(false);
   const {
     fullAccessPath,
@@ -35,72 +55,83 @@ export const SliderComponent = React.memo((props: SliderComponentProps) => {
     addNotification,
     changeCallback = () => {},
     displayName,
-    id
+    id,
   } = props;
 
-  useEffect(() => {
-    renderCount.current++;
-  });
-
   useEffect(() => {
     addNotification(`${fullAccessPath} changed to ${value.value}.`);
-  }, [props.value]);
+  }, [props.value.value]);
 
   useEffect(() => {
     addNotification(`${fullAccessPath}.min changed to ${min.value}.`);
-  }, [props.min]);
+  }, [props.min.value, props.min.type]);
 
   useEffect(() => {
     addNotification(`${fullAccessPath}.max changed to ${max.value}.`);
-  }, [props.max]);
+  }, [props.max.value, props.max.type]);
 
   useEffect(() => {
     addNotification(`${fullAccessPath}.stepSize changed to ${stepSize.value}.`);
-  }, [props.stepSize]);
+  }, [props.stepSize.value, props.stepSize.type]);
 
-  const handleOnChange = (event, newNumber: number | number[]) => {
+  const handleOnChange = (_: Event, newNumber: number | number[]) => {
     // This will never be the case as we do not have a range slider. However, we should
     // make sure this is properly handled.
     if (Array.isArray(newNumber)) {
       newNumber = newNumber[0];
     }
-    changeCallback({
-      type: value.type,
-      value: newNumber,
-      full_access_path: `${fullAccessPath}.value`,
-      readonly: value.readonly,
-      doc: docString
-    });
+
+    let serializedObject: SerializedObject;
+    if (value.type === "Quantity") {
+      serializedObject = {
+        type: "Quantity",
+        value: {
+          magnitude: newNumber,
+          unit: value.value.unit,
+        } as QuantityMap,
+        full_access_path: `${fullAccessPath}.value`,
+        readonly: value.readonly,
+        doc: docString,
+      };
+    } else {
+      serializedObject = {
+        type: value.type,
+        value: newNumber,
+        full_access_path: `${fullAccessPath}.value`,
+        readonly: value.readonly,
+        doc: docString,
+      };
+    }
+    changeCallback(serializedObject);
   };
 
   const handleValueChange = (
     newValue: number,
     name: string,
-    valueObject: NumberObject
+    valueObject: NumberObject,
   ) => {
-    changeCallback({
-      type: valueObject.type,
-      value: newValue,
-      full_access_path: `${fullAccessPath}.${name}`,
-      readonly: valueObject.readonly
-    });
-  };
-
-  const deconstructNumberDict = (
-    numberDict: NumberObject
-  ): [number, boolean, string | null] => {
-    let numberMagnitude: number;
-    let numberUnit: string | null = null;
-    const numberReadOnly = numberDict.readonly;
-
-    if (numberDict.type === 'int' || numberDict.type === 'float') {
-      numberMagnitude = numberDict.value;
-    } else if (numberDict.type === 'Quantity') {
-      numberMagnitude = numberDict.value.magnitude;
-      numberUnit = numberDict.value.unit;
+    let serializedObject: SerializedObject;
+    if (valueObject.type === "Quantity") {
+      serializedObject = {
+        type: valueObject.type,
+        value: {
+          magnitude: newValue,
+          unit: valueObject.value.unit,
+        } as QuantityMap,
+        full_access_path: `${fullAccessPath}.${name}`,
+        readonly: valueObject.readonly,
+        doc: null,
+      };
+    } else {
+      serializedObject = {
+        type: valueObject.type,
+        value: newValue,
+        full_access_path: `${fullAccessPath}.${name}`,
+        readonly: valueObject.readonly,
+        doc: null,
+      };
     }
-
-    return [numberMagnitude, numberReadOnly, numberUnit];
+    changeCallback(serializedObject);
   };
 
   const [valueMagnitude, valueReadOnly, valueUnit] = deconstructNumberDict(value);
@@ -110,9 +141,7 @@ export const SliderComponent = React.memo((props: SliderComponentProps) => {
 
   return (
     <div className="component sliderComponent" id={id}>
-      {process.env.NODE_ENV === 'development' && (
-        <div>Render count: {renderCount.current}</div>
-      )}
+      {process.env.NODE_ENV === "development" && <div>Render count: {renderCount}</div>}
 
       <Row>
         <Col xs="auto" xl="auto">
@@ -123,7 +152,7 @@ export const SliderComponent = React.memo((props: SliderComponentProps) => {
         </Col>
         <Col xs="5" xl>
           <Slider
-            style={{ margin: '0px 0px 10px 0px' }}
+            style={{ margin: "0px 0px 10px 0px" }}
             aria-label="Always visible"
             // valueLabelDisplay="on"
             disabled={valueReadOnly}
@@ -134,7 +163,7 @@ export const SliderComponent = React.memo((props: SliderComponentProps) => {
             step={stepSizeMagnitude}
             marks={[
               { value: minMagnitude, label: `${minMagnitude}` },
-              { value: maxMagnitude, label: `${maxMagnitude}` }
+              { value: maxMagnitude, label: `${maxMagnitude}` },
             ]}
           />
         </Col>
@@ -144,12 +173,12 @@ export const SliderComponent = React.memo((props: SliderComponentProps) => {
             fullAccessPath={`${fullAccessPath}.value`}
             docString={docString}
             readOnly={valueReadOnly}
-            type="float"
+            type={value.type}
             value={valueMagnitude}
             unit={valueUnit}
             addNotification={() => {}}
             changeCallback={changeCallback}
-            id={id + '-value'}
+            id={id + "-value"}
           />
         </Col>
         <Col xs="auto">
@@ -179,14 +208,14 @@ export const SliderComponent = React.memo((props: SliderComponentProps) => {
         <Form.Group>
           <Row
             className="justify-content-center"
-            style={{ paddingTop: '20px', margin: '10px' }}>
+            style={{ paddingTop: "20px", margin: "10px" }}>
             <Col xs="auto">
               <Form.Label>Min Value</Form.Label>
               <Form.Control
                 type="number"
                 value={minMagnitude}
                 disabled={minReadOnly}
-                onChange={(e) => handleValueChange(Number(e.target.value), 'min', min)}
+                onChange={(e) => handleValueChange(Number(e.target.value), "min", min)}
               />
             </Col>
 
@@ -196,7 +225,7 @@ export const SliderComponent = React.memo((props: SliderComponentProps) => {
                 type="number"
                 value={maxMagnitude}
                 disabled={maxReadOnly}
-                onChange={(e) => handleValueChange(Number(e.target.value), 'max', max)}
+                onChange={(e) => handleValueChange(Number(e.target.value), "max", max)}
               />
             </Col>
 
@@ -207,7 +236,7 @@ export const SliderComponent = React.memo((props: SliderComponentProps) => {
                 value={stepSizeMagnitude}
                 disabled={stepSizeReadOnly}
                 onChange={(e) =>
-                  handleValueChange(Number(e.target.value), 'step_size', stepSize)
+                  handleValueChange(Number(e.target.value), "step_size", stepSize)
                 }
               />
             </Col>
@@ -216,4 +245,6 @@ export const SliderComponent = React.memo((props: SliderComponentProps) => {
       </Collapse>
     </div>
   );
-});
+}, propsAreEqual);
+
+SliderComponent.displayName = "SliderComponent";

frontend/src/components/StringComponent.tsx

@@ -1,23 +1,24 @@
-import React, { useEffect, useRef, useState } from 'react';
-import { Form, InputGroup } from 'react-bootstrap';
-import { DocStringComponent } from './DocStringComponent';
-import '../App.css';
-import { LevelName } from './NotificationsComponent';
-import { SerializedValue } from './GenericComponent';
+import React, { useEffect, useState } from "react";
+import { Form, InputGroup } from "react-bootstrap";
+import { DocStringComponent } from "./DocStringComponent";
+import "../App.css";
+import { LevelName } from "./NotificationsComponent";
+import { SerializedObject } from "../types/SerializedObject";
+import useRenderCount from "../hooks/useRenderCount";
 
 // TODO: add button functionality
 
-type StringComponentProps = {
+interface StringComponentProps {
   fullAccessPath: string;
   value: string;
   readOnly: boolean;
-  docString: string;
+  docString: string | null;
   isInstantUpdate: boolean;
   addNotification: (message: string, levelname?: LevelName) => void;
-  changeCallback?: (value: SerializedValue, callback?: (ack: unknown) => void) => void;
+  changeCallback?: (value: SerializedObject, callback?: (ack: unknown) => void) => void;
   displayName: string;
   id: string;
-};
+}
 
 export const StringComponent = React.memo((props: StringComponentProps) => {
   const {
@@ -28,16 +29,12 @@ export const StringComponent = React.memo((props: StringComponentProps) => {
     addNotification,
     changeCallback = () => {},
     displayName,
-    id
+    id,
   } = props;
 
-  const renderCount = useRef(0);
+  const renderCount = useRenderCount();
   const [inputString, setInputString] = useState(props.value);
 
-  useEffect(() => {
-    renderCount.current++;
-  }, [isInstantUpdate, inputString, renderCount]);
-
   useEffect(() => {
     // Only update the inputString if it's different from the prop value
     if (props.value !== inputString) {
@@ -46,21 +43,27 @@ export const StringComponent = React.memo((props: StringComponentProps) => {
     addNotification(`${fullAccessPath} changed to ${props.value}.`);
   }, [props.value]);
 
-  const handleChange = (event) => {
+  const handleChange = (event: React.ChangeEvent<HTMLInputElement>) => {
     setInputString(event.target.value);
     if (isInstantUpdate) {
-      changeCallback(event.target.value);
+      changeCallback({
+        type: "str",
+        value: event.target.value,
+        full_access_path: fullAccessPath,
+        readonly: readOnly,
+        doc: docString,
+      });
     }
   };
 
-  const handleKeyDown = (event) => {
-    if (event.key === 'Enter' && !isInstantUpdate) {
+  const handleKeyDown = (event: React.KeyboardEvent<HTMLInputElement>) => {
+    if (event.key === "Enter" && !isInstantUpdate) {
       changeCallback({
-        type: 'str',
+        type: "str",
         value: inputString,
         full_access_path: fullAccessPath,
         readonly: readOnly,
-        doc: docString
+        doc: docString,
       });
       event.preventDefault();
     }
@@ -69,20 +72,18 @@ export const StringComponent = React.memo((props: StringComponentProps) => {
   const handleBlur = () => {
     if (!isInstantUpdate) {
       changeCallback({
-        type: 'str',
+        type: "str",
         value: inputString,
         full_access_path: fullAccessPath,
         readonly: readOnly,
-        doc: docString
+        doc: docString,
       });
     }
   };
 
   return (
     <div className="component stringComponent" id={id}>
-      {process.env.NODE_ENV === 'development' && (
-        <div>Render count: {renderCount.current}</div>
-      )}
+      {process.env.NODE_ENV === "development" && <div>Render count: {renderCount}</div>}
       <InputGroup>
         <InputGroup.Text>
           {displayName}
@@ -96,9 +97,11 @@ export const StringComponent = React.memo((props: StringComponentProps) => {
           onChange={handleChange}
           onKeyDown={handleKeyDown}
           onBlur={handleBlur}
-          className={isInstantUpdate && !readOnly ? 'instantUpdate' : ''}
+          className={isInstantUpdate && !readOnly ? "instantUpdate" : ""}
         />
       </InputGroup>
     </div>
   );
 });
+
+StringComponent.displayName = "StringComponent";

frontend/src/components/TaskComponent.tsx

@@ -0,0 +1,75 @@
+import React, { useEffect, useRef, useState } from "react";
+import { runMethod } from "../socket";
+import { Form, Button, InputGroup, Spinner } from "react-bootstrap";
+import { DocStringComponent } from "./DocStringComponent";
+import { LevelName } from "./NotificationsComponent";
+import useRenderCount from "../hooks/useRenderCount";
+
+export type TaskStatus = "RUNNING" | "NOT_RUNNING";
+
+interface TaskProps {
+  fullAccessPath: string;
+  docString: string | null;
+  status: TaskStatus;
+  addNotification: (message: string, levelname?: LevelName) => void;
+  displayName: string;
+  id: string;
+}
+
+export const TaskComponent = React.memo((props: TaskProps) => {
+  const { fullAccessPath, docString, status, addNotification, displayName, id } = props;
+
+  const renderCount = useRenderCount();
+  const formRef = useRef(null);
+  const [spinning, setSpinning] = useState(false);
+
+  useEffect(() => {
+    let message: string;
+
+    if (status === "RUNNING") {
+      message = `${fullAccessPath} was started.`;
+    } else {
+      message = `${fullAccessPath} was stopped.`;
+    }
+
+    addNotification(message);
+    setSpinning(false);
+  }, [status]);
+
+  const execute = async (event: React.FormEvent) => {
+    event.preventDefault();
+
+    const method_name = status == "RUNNING" ? "stop" : "start";
+
+    const accessPath = [fullAccessPath, method_name]
+      .filter((element) => element)
+      .join(".");
+    setSpinning(true);
+    runMethod(accessPath);
+  };
+
+  return (
+    <div className="component taskComponent" id={id}>
+      {process.env.NODE_ENV === "development" && <div>Render count: {renderCount}</div>}
+      <Form onSubmit={execute} ref={formRef}>
+        <InputGroup>
+          <InputGroup.Text>
+            {displayName}
+            <DocStringComponent docString={docString} />
+          </InputGroup.Text>
+          <Button id={`button-${id}`} type="submit">
+            {spinning ? (
+              <Spinner size="sm" role="status" aria-hidden="true" />
+            ) : status === "RUNNING" ? (
+              "Stop "
+            ) : (
+              "Start "
+            )}
+          </Button>
+        </InputGroup>
+      </Form>
+    </div>
+  );
+});
+
+TaskComponent.displayName = "TaskComponent";

frontend/src/hooks/useLocalStorage.ts

@@ -0,0 +1,18 @@
+import { useState, useEffect } from "react";
+
+export default function useLocalStorage(key: string, defaultValue: unknown) {
+  const [value, setValue] = useState(() => {
+    const storedValue = localStorage.getItem(key);
+    if (storedValue) {
+      return JSON.parse(storedValue);
+    }
+    return defaultValue;
+  });
+
+  useEffect(() => {
+    if (value === undefined) return;
+    localStorage.setItem(key, JSON.stringify(value));
+  }, [value, key]);
+
+  return [value, setValue];
+}

frontend/src/hooks/useRenderCount.ts

@@ -0,0 +1,11 @@
+import { useRef, useEffect } from "react";
+
+export default function useRenderCount() {
+  const count = useRef(0);
+
+  useEffect(() => {
+    count.current += 1;
+  });
+
+  return count.current;
+}

frontend/src/hooks/useSortedEntries.ts

@@ -0,0 +1,28 @@
+import { useContext } from "react";
+import { WebSettingsContext } from "../WebSettings";
+import { SerializedObject } from "../types/SerializedObject";
+
+export default function useSortedEntries(
+  props: Record<string, SerializedObject> | SerializedObject[],
+) {
+  const webSettings = useContext(WebSettingsContext);
+
+  // Get the order for sorting
+  const getOrder = (fullAccessPath: string) => {
+    return webSettings[fullAccessPath]?.displayOrder ?? Number.MAX_SAFE_INTEGER;
+  };
+
+  // Sort entries based on whether props is an array or an object
+  let sortedEntries;
+  if (Array.isArray(props)) {
+    // Need to make copy of array to leave the original array unmodified
+    sortedEntries = [...props].sort((objectA, objectB) => {
+      return getOrder(objectA.full_access_path) - getOrder(objectB.full_access_path);
+    });
+  } else {
+    sortedEntries = Object.values(props).sort((objectA, objectB) => {
+      return getOrder(objectA.full_access_path) - getOrder(objectB.full_access_path);
+    });
+  }
+  return sortedEntries;
+}

frontend/src/index.tsx

@@ -1,10 +1,13 @@
-import App from './App';
-import { createRoot } from 'react-dom/client';
+import App from "./App";
+import React from "react";
+import ReactDOM from "react-dom/client";
 
 // Importing the Bootstrap CSS
-import 'bootstrap/dist/css/bootstrap.min.css';
+import "bootstrap/dist/css/bootstrap.min.css";
 
 // Render the App component into the #root div
-const container = document.getElementById('root');
-const root = createRoot(container);
-root.render(<App />);
+ReactDOM.createRoot(document.getElementById("root")!).render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+);

frontend/src/socket.ts

@@ -1,30 +1,30 @@
-import { io } from 'socket.io-client';
-import { SerializedValue } from './components/GenericComponent';
-import { serializeDict, serializeList } from './utils/serializationUtils';
+import { io } from "socket.io-client";
+import { serializeDict, serializeList } from "./utils/serializationUtils";
+import { SerializedObject } from "./types/SerializedObject";
 
 export const hostname =
-  process.env.NODE_ENV === 'development' ? `localhost` : window.location.hostname;
+  process.env.NODE_ENV === "development" ? `localhost` : window.location.hostname;
 export const port =
-  process.env.NODE_ENV === 'development' ? 8001 : window.location.port;
+  process.env.NODE_ENV === "development" ? 8001 : window.location.port;
 const URL = `ws://${hostname}:${port}/`;
-console.debug('Websocket: ', URL);
+console.debug("Websocket: ", URL);
 
-export const socket = io(URL, { path: '/ws/socket.io', transports: ['websocket'] });
+export const socket = io(URL, { path: "/ws/socket.io", transports: ["websocket"] });
 
 export const updateValue = (
-  serializedObject: SerializedValue,
-  callback?: (ack: unknown) => void
+  serializedObject: SerializedObject,
+  callback?: (ack: unknown) => void,
 ) => {
   if (callback) {
     socket.emit(
-      'update_value',
-      { access_path: serializedObject['full_access_path'], value: serializedObject },
-      callback
+      "update_value",
+      { access_path: serializedObject["full_access_path"], value: serializedObject },
+      callback,
     );
   } else {
-    socket.emit('update_value', {
-      access_path: serializedObject['full_access_path'],
-      value: serializedObject
+    socket.emit("update_value", {
+      access_path: serializedObject["full_access_path"],
+      value: serializedObject,
     });
   }
 };
@@ -33,22 +33,22 @@ export const runMethod = (
   accessPath: string,
   args: unknown[] = [],
   kwargs: Record<string, unknown> = {},
-  callback?: (ack: unknown) => void
+  callback?: (ack: unknown) => void,
 ) => {
   const serializedArgs = serializeList(args);
   const serializedKwargs = serializeDict(kwargs);
 
   if (callback) {
     socket.emit(
-      'trigger_method',
+      "trigger_method",
       { access_path: accessPath, args: serializedArgs, kwargs: serializedKwargs },
-      callback
+      callback,
     );
   } else {
-    socket.emit('trigger_method', {
+    socket.emit("trigger_method", {
       access_path: accessPath,
       args: serializedArgs,
-      kwargs: serializedKwargs
+      kwargs: serializedKwargs,
     });
   }
 };

frontend/src/types/QuantityMap.ts

@@ -0,0 +1,4 @@
+export interface QuantityMap {
+  magnitude: number;
+  unit: string;
+}

frontend/src/types/SerializedObject.ts

@@ -0,0 +1,106 @@
+import { QuantityMap } from "./QuantityMap";
+
+interface SignatureDict {
+  parameters: Record<string, Record<string, unknown>>;
+  return_annotation: Record<string, unknown>;
+}
+
+interface SerializedObjectBase {
+  full_access_path: string;
+  doc: string | null;
+  readonly: boolean;
+}
+
+type SerializedInteger = SerializedObjectBase & {
+  value: number;
+  type: "int";
+};
+
+type SerializedFloat = SerializedObjectBase & {
+  value: number;
+  type: "float";
+};
+
+type SerializedQuantity = SerializedObjectBase & {
+  value: QuantityMap;
+  type: "Quantity";
+};
+
+type SerializedBool = SerializedObjectBase & {
+  value: boolean;
+  type: "bool";
+};
+
+type SerializedString = SerializedObjectBase & {
+  value: string;
+  type: "str";
+};
+
+export type SerializedEnum = SerializedObjectBase & {
+  name: string;
+  value: string;
+  type: "Enum" | "ColouredEnum";
+  enum: Record<string, string>;
+};
+
+type SerializedList = SerializedObjectBase & {
+  value: SerializedObject[];
+  type: "list";
+};
+
+type SerializedDict = SerializedObjectBase & {
+  value: Record<string, SerializedObject>;
+  type: "dict";
+};
+
+type SerializedNoneType = SerializedObjectBase & {
+  value: null;
+  type: "NoneType";
+};
+
+type SerializedNoValue = SerializedObjectBase & {
+  value: null;
+  type: "None";
+};
+
+type SerializedMethod = SerializedObjectBase & {
+  value: "RUNNING" | null;
+  type: "method";
+  async: boolean;
+  signature: SignatureDict;
+  frontend_render: boolean;
+};
+
+type SerializedException = SerializedObjectBase & {
+  name: string;
+  value: string;
+  type: "Exception";
+};
+
+type DataServiceTypes =
+  | "DataService"
+  | "Image"
+  | "NumberSlider"
+  | "DeviceConnection"
+  | "Task";
+
+type SerializedDataService = SerializedObjectBase & {
+  name: string;
+  value: Record<string, SerializedObject>;
+  type: DataServiceTypes;
+};
+
+export type SerializedObject =
+  | SerializedBool
+  | SerializedFloat
+  | SerializedInteger
+  | SerializedString
+  | SerializedList
+  | SerializedDict
+  | SerializedNoneType
+  | SerializedMethod
+  | SerializedException
+  | SerializedDataService
+  | SerializedEnum
+  | SerializedQuantity
+  | SerializedNoValue;

frontend/src/utils/propsAreEqual.ts

@@ -0,0 +1,17 @@
+import deepEqual from "deep-equal";
+
+export const propsAreEqual = <T extends object>(
+  prevProps: T,
+  nextProps: T,
+): boolean => {
+  for (const key in nextProps) {
+    if (typeof nextProps[key] === "object") {
+      if (!deepEqual(prevProps[key], nextProps[key])) {
+        return false;
+      }
+    } else if (!Object.is(prevProps[key], nextProps[key])) {
+      return false;
+    }
+  }
+  return true;
+};

frontend/src/utils/serializationUtils.ts

@@ -1,101 +1,97 @@
+import { SerializedObject } from "../types/SerializedObject";
+
 const serializePrimitive = (
   obj: number | boolean | string | null,
-  accessPath: string
-) => {
-  let type: string;
-
-  if (typeof obj === 'number') {
-    type = Number.isInteger(obj) ? 'int' : 'float';
+  accessPath: string,
+): SerializedObject => {
+  if (typeof obj === "number") {
     return {
       full_access_path: accessPath,
       doc: null,
       readonly: false,
-      type,
-      value: obj
+      type: Number.isInteger(obj) ? "int" : "float",
+      value: obj,
     };
-  } else if (typeof obj === 'boolean') {
-    type = 'bool';
+  } else if (typeof obj === "boolean") {
     return {
       full_access_path: accessPath,
       doc: null,
       readonly: false,
-      type,
-      value: obj
+      type: "bool",
+      value: obj,
     };
-  } else if (typeof obj === 'string') {
-    type = 'str';
+  } else if (typeof obj === "string") {
     return {
       full_access_path: accessPath,
       doc: null,
       readonly: false,
-      type,
-      value: obj
+      type: "str",
+      value: obj,
     };
   } else if (obj === null) {
-    type = 'NoneType';
     return {
       full_access_path: accessPath,
       doc: null,
       readonly: false,
-      type,
-      value: null
+      type: "None",
+      value: null,
     };
   } else {
-    throw new Error('Unsupported type for serialization');
+    throw new Error("Unsupported type for serialization");
   }
 };
 
-export const serializeList = (obj: unknown[], accessPath: string = '') => {
+export const serializeList = (obj: unknown[], accessPath = "") => {
   const doc = null;
   const value = obj.map((item, index) => {
     if (
-      typeof item === 'number' ||
-      typeof item === 'boolean' ||
-      typeof item === 'string' ||
+      typeof item === "number" ||
+      typeof item === "boolean" ||
+      typeof item === "string" ||
       item === null
     ) {
       serializePrimitive(
         item as number | boolean | string | null,
-        `${accessPath}[${index}]`
+        `${accessPath}[${index}]`,
       );
     }
   });
 
   return {
     full_access_path: accessPath,
-    type: 'list',
+    type: "list",
     value,
     readonly: false,
-    doc
+    doc,
   };
 };
-export const serializeDict = (
-  obj: Record<string, unknown>,
-  accessPath: string = ''
-) => {
+export const serializeDict = (obj: Record<string, unknown>, accessPath = "") => {
   const doc = null;
-  const value = Object.entries(obj).reduce((acc, [key, val]) => {
-    // Construct the new access path for nested properties
-    const newPath = `${accessPath}["${key}"]`;
+  const value = Object.entries(obj).reduce(
+    (acc, [key, val]) => {
+      // Construct the new access path for nested properties
+      const newPath = `${accessPath}["${key}"]`;
 
-    // Serialize each value in the dictionary and assign to the accumulator
-    if (
-      typeof val === 'number' ||
-      typeof val === 'boolean' ||
-      typeof val === 'string' ||
-      val === null
-    ) {
-      acc[key] = serializePrimitive(val as number | boolean | string | null, newPath);
-    }
+      // Serialize each value in the dictionary and assign to the accumulator
+      if (
+        typeof val === "number" ||
+        typeof val === "boolean" ||
+        typeof val === "string" ||
+        val === null
+      ) {
+        acc[key] = serializePrimitive(val as number | boolean | string | null, newPath);
+      }
 
-    return acc;
-  }, {});
+      return acc;
+    },
+    {} as Record<string, SerializedObject>,
+  );
 
   return {
     full_access_path: accessPath,
-    type: 'dict',
+    type: "dict",
     value,
     readonly: false,
-    doc
+    doc,
   };
 };

frontend/src/utils/stateUtils.ts

@@ -1,11 +1,12 @@
-import { SerializedValue } from '../components/GenericComponent';
+import { SerializedObject } from "../types/SerializedObject";
 
-export type State = {
+export interface State {
   type: string;
-  value: Record<string, SerializedValue> | null;
+  name: string;
+  value: Record<string, SerializedObject> | null;
   readonly: boolean;
   doc: string | null;
-};
+}
 
 /**
  * Splits a full access path into its atomic parts, separating attribute names, numeric
@@ -44,7 +45,7 @@ export function parseFullAccessPath(path: string): string[] {
  */
 function parseSerializedKey(serializedKey: string): string | number {
   // Strip outer brackets if present
-  if (serializedKey.startsWith('[') && serializedKey.endsWith(']')) {
+  if (serializedKey.startsWith("[") && serializedKey.endsWith("]")) {
     serializedKey = serializedKey.slice(1, -1);
   }
 
@@ -67,12 +68,13 @@ function parseSerializedKey(serializedKey: string): string | number {
 }
 
 function getOrCreateItemInContainer(
-  container: Record<string | number, SerializedValue> | SerializedValue[],
+  container: Record<string | number, SerializedObject> | SerializedObject[],
   key: string | number,
-  allowAddKey: boolean
-): SerializedValue {
+  allowAddKey: boolean,
+): SerializedObject {
   // Check if the key exists and return the item if it does
   if (key in container) {
+    /* @ts-expect-error Key is in the correct form but converted to type any for some reason */
     return container[key];
   }
 
@@ -106,10 +108,10 @@ function getOrCreateItemInContainer(
  * @throws SerializationValueError If the expected structure is incorrect.
  */
 function getContainerItemByKey(
-  container: Record<string, SerializedValue> | SerializedValue[],
+  container: Record<string, SerializedObject> | SerializedObject[],
   key: string,
-  allowAppend: boolean = false
-): SerializedValue {
+  allowAppend = false,
+): SerializedObject {
   const processedKey = parseSerializedKey(key);
 
   try {
@@ -125,13 +127,13 @@ function getContainerItemByKey(
 }
 
 export function setNestedValueByPath(
-  serializationDict: Record<string, SerializedValue>,
+  serializationDict: Record<string, SerializedObject>,
   path: string,
-  serializedValue: SerializedValue
-): Record<string, SerializedValue> {
+  serializedValue: SerializedObject,
+): Record<string, SerializedObject> {
   const pathParts = parseFullAccessPath(path);
-  const newSerializationDict: Record<string, SerializedValue> = JSON.parse(
-    JSON.stringify(serializationDict)
+  const newSerializationDict: Record<string, SerializedObject> = JSON.parse(
+    JSON.stringify(serializationDict),
   );
 
   let currentDict = newSerializationDict;
@@ -142,11 +144,11 @@ export function setNestedValueByPath(
       const nextLevelSerializedObject = getContainerItemByKey(
         currentDict,
         pathPart,
-        false
+        false,
       );
-      currentDict = nextLevelSerializedObject['value'] as Record<
+      currentDict = nextLevelSerializedObject["value"] as Record<
         string,
-        SerializedValue
+        SerializedObject
       >;
     }
 
@@ -159,14 +161,15 @@ export function setNestedValueByPath(
   } catch (error) {
     console.error(`Error occurred trying to change ${path}: ${error}`);
   }
+  return {};
 }
 
-function createEmptySerializedObject(): SerializedValue {
+function createEmptySerializedObject(): SerializedObject {
   return {
-    full_access_path: '',
-    value: undefined,
-    type: 'None',
+    full_access_path: "",
+    value: null,
+    type: "None",
     doc: null,
-    readonly: false
+    readonly: false,
   };
 }

frontend/src/utils/stringUtils.ts

@@ -1,16 +1,16 @@
 export function getIdFromFullAccessPath(fullAccessPath: string) {
   if (fullAccessPath) {
     // Replace '].' with a single dash
-    let id = fullAccessPath.replace(/\]\./g, '-');
+    let id = fullAccessPath.replace(/\]\./g, "-");
 
     // Replace any character that is not a word character or underscore with a dash
-    id = id.replace(/[^\w_]+/g, '-');
+    id = id.replace(/[^\w_]+/g, "-");
 
     // Remove any trailing dashes
-    id = id.replace(/-+$/, '');
+    id = id.replace(/-+$/, "");
 
     return id;
   } else {
-    return 'main';
+    return "main";
   }
 }

frontend/tsconfig.app.json

@@ -0,0 +1,31 @@
+{
+    "compilerOptions": {
+        "composite": true,
+        "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.app.tsbuildinfo",
+        "target": "ES2020",
+        "useDefineForClassFields": true,
+        "lib": [
+            "ES2020",
+            "DOM",
+            "DOM.Iterable"
+        ],
+        "module": "ESNext",
+        "skipLibCheck": true,
+        /* Bundler mode */
+        "moduleResolution": "bundler",
+        "allowImportingTsExtensions": true,
+        "resolveJsonModule": true,
+        "isolatedModules": true,
+        "moduleDetection": "force",
+        "noEmit": true,
+        "jsx": "react-jsx",
+        /* Linting */
+        "strict": true,
+        "noUnusedLocals": true,
+        "noUnusedParameters": true,
+        "noFallthroughCasesInSwitch": true
+    },
+    "include": [
+        "src"
+    ]
+}

frontend/tsconfig.json

@@ -1,8 +1,11 @@
 {
-    "compilerOptions": {
-        "jsx": "react-jsx",
-        "allowImportingTsExtensions": true,
-        "noEmit": true,
-        "esModuleInterop": true
-    }
-}
+    "files": [],
+    "references": [
+        {
+            "path": "./tsconfig.app.json"
+        },
+        {
+            "path": "./tsconfig.node.json"
+        }
+    ]
+}

frontend/tsconfig.node.json

@@ -0,0 +1,15 @@
+{
+    "compilerOptions": {
+        "composite": true,
+        "tsBuildInfoFile": "./node_modules/.tmp/tsconfig.node.tsbuildinfo",
+        "skipLibCheck": true,
+        "module": "ESNext",
+        "moduleResolution": "bundler",
+        "allowSyntheticDefaultImports": true,
+        "strict": true,
+        "noEmit": true
+    },
+    "include": [
+        "vite.config.ts"
+    ]
+}

frontend/vite.config.ts

@@ -0,0 +1,13 @@
+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react-swc";
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [react()],
+  build: {
+    outDir: "../src/pydase/frontend",
+  },
+  esbuild: {
+    drop: ["console", "debugger"],
+  },
+});

mkdocs.yml

@@ -4,8 +4,13 @@ edit_uri: blob/docs/docs/
 nav:
   - Home: index.md
   - Getting Started: getting-started.md
-  - User Guide: 
+  - User Guide:
     - Components Guide: user-guide/Components.md
+    - Interacting with pydase Services: user-guide/interaction/README.md
+    - Achieving Service Persistence: user-guide/Service_Persistence.md
+    - Understanding Tasks: user-guide/Tasks.md
+    - Understanding Units: user-guide/Understanding-Units.md
+    - Validating Property Setters: user-guide/Validating-Property-Setters.md
   - Developer Guide: 
     - Developer Guide: dev-guide/README.md
     - API Reference: dev-guide/api.md
@@ -16,7 +21,10 @@ nav:
     - Contributing: about/contributing.md
     - License: about/license.md
 
-theme: readthedocs
+theme: 
+  name: material
+  features:
+    - content.code.copy
 
 extra_css:
   - css/extra.css
@@ -26,17 +34,45 @@ markdown_extensions:
   - toc:
       permalink: true
   - pymdownx.highlight:
+      use_pygments: true
       anchor_linenums: true
+      line_spans: __span
+      pygments_lang_class: true
   - pymdownx.snippets
   - pymdownx.superfences
-  # - pymdownx.highlight:
-  # - pymdownx.inlinehilite
+  - pymdownx.inlinehilite
 
 
 plugins:
-  - include-markdown
-  - search
-  - mkdocstrings
+- include-markdown
+- search
+- mkdocstrings:
+    handlers:
+      python:
+        paths: [src]  # search packages in the src folder
+        import:
+          - https://docs.python.org/3/objects.inv
+          - https://docs.pydantic.dev/latest/objects.inv
+          - https://confz.readthedocs.io/en/latest/objects.inv
+        options:
+          show_source: true
+          inherited_members: true
+          merge_init_into_class: true
+          show_signature_annotations: true
+          signature_crossrefs: true
+          separate_signature: true
+          docstring_options:
+            ignore_init_summary: true
+          # docstring_section_style: list
+          heading_level: 2
+          parameter_headings: true
+          show_root_heading: true
+          show_root_full_path: true
+          show_symbol_type_heading: true
+          show_symbol_type_toc: true
+          # summary: true
+          unwrap_annotated: true
+- swagger-ui-tag
 
 watch:
   - src/pydase

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pydase"
-version = "0.8.3"
+version = "0.10.2"
 description = "A flexible and robust Python library for creating, managing, and interacting with data services, with built-in support for web and RPC servers, and customizable features for diverse use cases."
 authors = ["Mose Mueller <mosmuell@ethz.ch>"]
 readme = "README.md"
@@ -9,15 +9,14 @@ packages = [{ include = "pydase", from = "src" }]
 
 [tool.poetry.dependencies]
 python = "^3.10"
-fastapi = "^0.108.0"
-uvicorn = "^0.27.0"
 toml = "^0.10.2"
 python-socketio = "^5.8.0"
 confz = "^2.0.0"
-pint = "^0.22"
-pillow = "^10.0.0"
+pint = "^0.24"
 websocket-client = "^1.7.0"
 aiohttp = "^3.9.3"
+click = "^8.1.7"
+aiohttp-middlewares = "^2.3.0"
 
 [tool.poetry.group.dev]
 optional = true
@@ -30,17 +29,18 @@ mypy = "^1.4.1"
 matplotlib = "^3.7.2"
 pyright = "^1.1.323"
 pytest-mock = "^3.11.1"
-ruff = "^0.2.0"
+ruff = "^0.5.0"
 pytest-asyncio = "^0.23.2"
 
 [tool.poetry.group.docs]
 optional = true
 
 [tool.poetry.group.docs.dependencies]
-mkdocs = "^1.5.2"
+mkdocs-material = "^9.5.30"
 mkdocs-include-markdown-plugin = "^3.9.1"
-mkdocstrings = "^0.22.0"
+mkdocstrings = {extras = ["python"], version = "^0.25.2"}
 pymdown-extensions = "^10.1"
+mkdocs-swagger-ui-tag = "^0.6.10"
 
 [build-system]
 requires = ["poetry-core"]

src/pydase/client/client.py

@@ -1,5 +1,6 @@
 import asyncio
 import logging
+import sys
 import threading
 from typing import TypedDict, cast
 
@@ -7,9 +8,16 @@ import socketio  # type: ignore
 
 import pydase.components
 from pydase.client.proxy_loader import ProxyClassMixin, ProxyLoader
+from pydase.utils.helpers import current_event_loop_exists
 from pydase.utils.serialization.deserializer import loads
 from pydase.utils.serialization.types import SerializedDataService, SerializedObject
 
+if sys.version_info < (3, 11):
+    from typing_extensions import Self
+else:
+    from typing import Self
+
+
 logger = logging.getLogger(__name__)
 
 
@@ -24,7 +32,10 @@ class NotifyDict(TypedDict):
 
 def asyncio_loop_thread(loop: asyncio.AbstractEventLoop) -> None:
     asyncio.set_event_loop(loop)
-    loop.run_forever()
+    try:
+        loop.run_forever()
+    except RuntimeError:
+        logger.debug("Tried starting even loop, but it is running already")
 
 
 class ProxyClass(ProxyClassMixin, pydase.components.DeviceConnection):
@@ -33,10 +44,10 @@ class ProxyClass(ProxyClassMixin, pydase.components.DeviceConnection):
     via a socket.io client in an asyncio environment.
 
     Args:
-        sio_client (socketio.AsyncClient):
+        sio_client:
             The socket.io client instance used for asynchronous communication with the
             pydase service server.
-        loop (asyncio.AbstractEventLoop):
+        loop:
             The event loop in which the client operations are managed and executed.
 
     This class is used to create a proxy object that behaves like a local representation
@@ -44,26 +55,27 @@ class ProxyClass(ProxyClassMixin, pydase.components.DeviceConnection):
     while actually communicating over network protocols.
     It can also be used as an attribute of a pydase service itself, e.g.
 
-        ```python
-        import pydase
+    ```python
+    import pydase
 
 
-        class MyService(pydase.DataService):
-            proxy = pydase.Client(
-                hostname="...", port=8001, block_until_connected=False
-            ).proxy
+    class MyService(pydase.DataService):
+        proxy = pydase.Client(
+            hostname="...", port=8001, block_until_connected=False
+        ).proxy
 
 
-        if __name__ == "__main__":
-            service = MyService()
-            server = pydase.Server(service, web_port=8002).run()
-        ```
+    if __name__ == "__main__":
+        service = MyService()
+        server = pydase.Server(service, web_port=8002).run()
+    ```
     """
 
     def __init__(
         self, sio_client: socketio.AsyncClient, loop: asyncio.AbstractEventLoop
     ) -> None:
         super().__init__()
+        pydase.components.DeviceConnection.__init__(self)
         self._initialise(sio_client=sio_client, loop=loop)
 
 
@@ -74,19 +86,16 @@ class Client:
     connection, disconnection, and updates, and ensures that the proxy object is
     up-to-date with the server state.
 
-    Attributes:
-        proxy (ProxyClass):
-            A proxy object representing the remote service, facilitating interaction as
-            if it were local.
-
     Args:
-        hostname (str):
-            Hostname of the exposed service this client attempts to connect to.
-            Default is "localhost".
-        port (int):
-            Port of the exposed service this client attempts to connect on.
-            Default is 8001.
-        block_until_connected (bool):
+        url:
+            The URL of the pydase Socket.IO server. This should always contain the
+            protocol and the hostname.
+
+            Examples:
+
+            - `wss://my-service.example.com`  # for secure connections, use wss
+            - `ws://localhost:8001`
+        block_until_connected:
             If set to True, the constructor will block until the connection to the
             service has been established. This is useful for ensuring the client is
             ready to use immediately after instantiation. Default is True.
@@ -94,42 +103,66 @@ class Client:
 
     def __init__(
         self,
-        hostname: str,
-        port: int,
+        *,
+        url: str,
         block_until_connected: bool = True,
     ):
-        self._hostname = hostname
-        self._port = port
+        self._url = url
         self._sio = socketio.AsyncClient()
-        self._loop = asyncio.new_event_loop()
+        if not current_event_loop_exists():
+            self._loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(self._loop)
+        else:
+            self._loop = asyncio.get_event_loop()
         self.proxy = ProxyClass(sio_client=self._sio, loop=self._loop)
+        """A proxy object representing the remote service, facilitating interaction as
+        if it were local."""
         self._thread = threading.Thread(
             target=asyncio_loop_thread, args=(self._loop,), daemon=True
         )
         self._thread.start()
+        self.connect(block_until_connected=block_until_connected)
+
+    def __enter__(self) -> Self:
+        self.connect(block_until_connected=True)
+        return self
+
+    def __del__(self) -> None:
+        self.disconnect()
+
+    def connect(self, block_until_connected: bool = True) -> None:
         connection_future = asyncio.run_coroutine_threadsafe(
             self._connect(), self._loop
         )
         if block_until_connected:
             connection_future.result()
 
+    def disconnect(self) -> None:
+        connection_future = asyncio.run_coroutine_threadsafe(
+            self._disconnect(), self._loop
+        )
+        connection_future.result()
+
     async def _connect(self) -> None:
-        logger.debug("Connecting to server '%s:%s' ...", self._hostname, self._port)
+        logger.debug("Connecting to server '%s' ...", self._url)
         await self._setup_events()
         await self._sio.connect(
-            f"ws://{self._hostname}:{self._port}",
+            self._url,
             socketio_path="/ws/socket.io",
             transports=["websocket"],
             retry=True,
         )
 
+    async def _disconnect(self) -> None:
+        await self._sio.disconnect()
+
     async def _setup_events(self) -> None:
         self._sio.on("connect", self._handle_connect)
         self._sio.on("disconnect", self._handle_disconnect)
         self._sio.on("notify", self._handle_update)
 
     async def _handle_connect(self) -> None:
-        logger.debug("Connected to '%s:%s' ...", self._hostname, self._port)
+        logger.debug("Connected to '%s' ...", self._url)
         serialized_object = cast(
             SerializedDataService, await self._sio.call("service_serialization")
         )
@@ -141,7 +174,7 @@ class Client:
         self.proxy._connected = True
 
     async def _handle_disconnect(self) -> None:
-        logger.debug("Disconnected from '%s:%s' ...", self._hostname, self._port)
+        logger.debug("Disconnected from '%s' ...", self._url)
         self.proxy._connected = False
 
     async def _handle_update(self, data: NotifyDict) -> None:

src/pydase/client/proxy_loader.py

@@ -351,7 +351,7 @@ class ProxyLoader:
     ) -> Any:
         # Custom types like Components or DataService classes
         component_class = cast(
-            type, Deserializer.get_component_class(serialized_object["type"])
+            type, Deserializer.get_service_base_class(serialized_object["type"])
         )
         class_bases = (
             ProxyClassMixin,

src/pydase/components/coloured_enum.py

@@ -7,58 +7,59 @@ class ColouredEnum(Enum):
 
     This class extends the standard Enum but requires its values to be valid CSS
     colour codes. Supported colour formats include:
-        - Hexadecimal colours
-        - Hexadecimal colours with transparency
-        - RGB colours
-        - RGBA colours
-        - HSL colours
-        - HSLA colours
-        - Predefined/Cross-browser colour names
+
+    - Hexadecimal colours
+    - Hexadecimal colours with transparency
+    - RGB colours
+    - RGBA colours
+    - HSL colours
+    - HSLA colours
+    - Predefined/Cross-browser colour names
+
     Refer to the this website for more details on colour formats:
     (https://www.w3schools.com/cssref/css_colours_legal.php)
 
     The behavior of this component in the UI depends on how it's defined in the data
     service:
-        - As property with a setter or as attribute: Renders as a dropdown menu,
-            allowing users to select and change its value from the frontend.
-        - As property without a setter: Displays as a coloured box with the key of the
-            `ColouredEnum` as text inside, serving as a visual indicator without user
-            interaction.
+
+    - As property with a setter or as attribute: Renders as a dropdown menu, allowing
+    users to select and change its value from the frontend.
+    - As property without a setter: Displays as a coloured box with the key of the
+    `ColouredEnum` as text inside, serving as a visual indicator without user
+    interaction.
 
     Example:
-    --------
-    ```python
-    import pydase.components as pyc
-    import pydase
+        ```python
+        import pydase.components as pyc
+        import pydase
 
-    class MyStatus(pyc.ColouredEnum):
-        PENDING = "#FFA500"  # Orange
-        RUNNING = "#0000FF80"  # Transparent Blue
-        PAUSED = "rgb(169, 169, 169)"  # Dark Gray
-        RETRYING = "rgba(255, 255, 0, 0.3)"  # Transparent Yellow
-        COMPLETED = "hsl(120, 100%, 50%)"  # Green
-        FAILED = "hsla(0, 100%, 50%, 0.7)"  # Transparent Red
-        CANCELLED = "SlateGray"  # Slate Gray
+        class MyStatus(pyc.ColouredEnum):
+            PENDING = "#FFA500"  # Orange
+            RUNNING = "#0000FF80"  # Transparent Blue
+            PAUSED = "rgb(169, 169, 169)"  # Dark Gray
+            RETRYING = "rgba(255, 255, 0, 0.3)"  # Transparent Yellow
+            COMPLETED = "hsl(120, 100%, 50%)"  # Green
+            FAILED = "hsla(0, 100%, 50%, 0.7)"  # Transparent Red
+            CANCELLED = "SlateGray"  # Slate Gray
 
-    class StatusExample(pydase.DataService):
-        _status = MyStatus.RUNNING
+        class StatusExample(pydase.DataService):
+            _status = MyStatus.RUNNING
 
-        @property
-        def status(self) -> MyStatus:
-            return self._status
+            @property
+            def status(self) -> MyStatus:
+                return self._status
 
-        @status.setter
-        def status(self, value: MyStatus) -> None:
-            # Custom logic here...
-            self._status = value
+            @status.setter
+            def status(self, value: MyStatus) -> None:
+                # Custom logic here...
+                self._status = value
 
-    # Example usage:
-    my_service = StatusExample()
-    my_service.status = MyStatus.FAILED
-    ```
+        # Example usage:
+        my_service = StatusExample()
+        my_service.status = MyStatus.FAILED
+        ```
 
-    Note
-    ----
-    Each enumeration name and value must be unique. This means that you should use
-    different colour formats when you want to use a colour multiple times.
+    Note:
+        Each enumeration name and value must be unique. This means that you should use
+        different colour formats when you want to use a colour multiple times.
     """

src/pydase/components/device_connection.py

@@ -1,6 +1,7 @@
 import asyncio
 
 import pydase.data_service
+import pydase.task.decorator
 
 
 class DeviceConnection(pydase.data_service.DataService):
@@ -19,22 +20,26 @@ class DeviceConnection(pydase.data_service.DataService):
     to the device. This method should update the `self._connected` attribute to reflect
     the connection status:
 
-    >>> class MyDeviceConnection(DeviceConnection):
-    ...     def connect(self) -> None:
-    ...         # Implementation to connect to the device
-    ...         # Update self._connected to `True` if connection is successful,
-    ...         # `False` otherwise
-    ...         ...
+    ```python
+    class MyDeviceConnection(DeviceConnection):
+        def connect(self) -> None:
+            # Implementation to connect to the device
+            # Update self._connected to `True` if connection is successful,
+            # `False` otherwise
+            ...
+    ```
 
     Optionally, if additional logic is needed to determine the connection status,
     the `connected` property can also be overridden:
 
-    >>> class MyDeviceConnection(DeviceConnection):
-    ...     @property
-    ...     def connected(self) -> bool:
-    ...         # Custom logic to determine connection status
-    ...         return some_custom_condition
-    ...
+    ```python
+    class MyDeviceConnection(DeviceConnection):
+        @property
+        def connected(self) -> bool:
+            # Custom logic to determine connection status
+            return some_custom_condition
+
+    ```
 
     Frontend Representation
     -----------------------
@@ -48,7 +53,6 @@ class DeviceConnection(pydase.data_service.DataService):
     def __init__(self) -> None:
         super().__init__()
         self._connected = False
-        self._autostart_tasks["_handle_connection"] = ()  # type: ignore
         self._reconnection_wait_time = 10.0
 
     def connect(self) -> None:
@@ -66,6 +70,7 @@ class DeviceConnection(pydase.data_service.DataService):
         """
         return self._connected
 
+    @pydase.task.decorator.task(autostart=True)
     async def _handle_connection(self) -> None:
         """Automatically tries reconnecting to the device if it is not connected.
         This method leverages the `connect` method and the `connected` property to

src/pydase/components/image.py

@@ -5,8 +5,6 @@ from pathlib import Path
 from typing import TYPE_CHECKING
 from urllib.request import urlopen
 
-import PIL.Image  # type: ignore[import-untyped]
-
 from pydase.data_service.data_service import DataService
 
 if TYPE_CHECKING:
@@ -16,9 +14,7 @@ logger = logging.getLogger(__name__)
 
 
 class Image(DataService):
-    def __init__(
-        self,
-    ) -> None:
+    def __init__(self) -> None:
         super().__init__()
         self._value: str = ""
         self._format: str = ""
@@ -32,8 +28,14 @@ class Image(DataService):
         return self._format
 
     def load_from_path(self, path: Path | str) -> None:
-        with PIL.Image.open(path) as image:
-            self._load_from_pil(image)
+        with open(path, "rb") as image_file:
+            image_data = image_file.read()
+        format_ = self._get_image_format_from_bytes(image_data)
+        if format_ is None:
+            logger.error("Unsupported image format. Skipping...")
+            return
+        value_ = base64.b64encode(image_data)
+        self._load_from_base64(value_, format_)
 
     def load_from_matplotlib_figure(self, fig: "Figure", format_: str = "png") -> None:
         buffer = io.BytesIO()
@@ -42,12 +44,18 @@ class Image(DataService):
         self._load_from_base64(value_, format_)
 
     def load_from_url(self, url: str) -> None:
-        image = PIL.Image.open(urlopen(url))
-        self._load_from_pil(image)
+        with urlopen(url) as response:
+            image_data = response.read()
+        format_ = self._get_image_format_from_bytes(image_data)
+        if format_ is None:
+            logger.error("Unsupported image format. Skipping...")
+            return
+        value_ = base64.b64encode(image_data)
+        self._load_from_base64(value_, format_)
 
     def load_from_base64(self, value_: bytes, format_: str | None = None) -> None:
         if format_ is None:
-            format_ = self._get_image_format_from_bytes(value_)
+            format_ = self._get_image_format_from_bytes(base64.b64decode(value_))
             if format_ is None:
                 logger.warning(
                     "Format of passed byte string could not be determined. Skipping..."
@@ -60,19 +68,14 @@ class Image(DataService):
         self._value = value
         self._format = format_
 
-    def _load_from_pil(self, image: PIL.Image.Image) -> None:
-        if image.format is not None:
-            format_ = image.format
-            buffer = io.BytesIO()
-            image.save(buffer, format=format_)
-            value_ = base64.b64encode(buffer.getvalue())
-            self._load_from_base64(value_, format_)
-        else:
-            logger.error("Image format is 'None'. Skipping...")
-
     def _get_image_format_from_bytes(self, value_: bytes) -> str | None:
-        image_data = base64.b64decode(value_)
-        # Create a writable memory buffer for the image
-        image_buffer = io.BytesIO(image_data)
-        # Read the image from the buffer and return format
-        return PIL.Image.open(image_buffer).format
+        format_map = {
+            b"\xff\xd8": "JPEG",
+            b"\x89PNG": "PNG",
+            b"GIF": "GIF",
+            b"RIFF": "WEBP",
+        }
+        for signature, format_name in format_map.items():
+            if value_.startswith(signature):
+                return format_name
+        return None

src/pydase/components/number_slider.py

@@ -11,76 +11,74 @@ class NumberSlider(DataService):
     This class models a UI slider for a data service, allowing for adjustments of a
     parameter within a specified range and increments.
 
-    Parameters:
-    -----------
-    value (float, optional):
-        The initial value of the slider. Defaults to 0.
-    min (float, optional):
-        The minimum value of the slider. Defaults to 0.
-    max (float, optional):
-        The maximum value of the slider. Defaults to 100.
-    step_size (float, optional):
-        The increment/decrement step size of the slider. Defaults to 1.0.
+    Args:
+        value:
+            The initial value of the slider. Defaults to 0.
+        min_:
+            The minimum value of the slider. Defaults to 0.
+        max_:
+            The maximum value of the slider. Defaults to 100.
+        step_size:
+            The increment/decrement step size of the slider. Defaults to 1.0.
 
     Example:
-    --------
-    ```python
-    class MySlider(pydase.components.NumberSlider):
-        def __init__(
-            self,
-            value: float = 0.0,
-            min_: float = 0.0,
-            max_: float = 100.0,
-            step_size: float = 1.0,
-        ) -> None:
-            super().__init__(value, min_, max_, step_size)
+        ```python
+        class MySlider(pydase.components.NumberSlider):
+            def __init__(
+                self,
+                value: float = 0.0,
+                min_: float = 0.0,
+                max_: float = 100.0,
+                step_size: float = 1.0,
+            ) -> None:
+                super().__init__(value, min_, max_, step_size)
 
-        @property
-        def min(self) -> float:
-            return self._min
+            @property
+            def min(self) -> float:
+                return self._min
 
-        @min.setter
-        def min(self, value: float) -> None:
-            self._min = value
+            @min.setter
+            def min(self, value: float) -> None:
+                self._min = value
 
-        @property
-        def max(self) -> float:
-            return self._max
+            @property
+            def max(self) -> float:
+                return self._max
 
-        @max.setter
-        def max(self, value: float) -> None:
-            self._max = value
+            @max.setter
+            def max(self, value: float) -> None:
+                self._max = value
 
-        @property
-        def step_size(self) -> float:
-            return self._step_size
+            @property
+            def step_size(self) -> float:
+                return self._step_size
 
-        @step_size.setter
-        def step_size(self, value: float) -> None:
-            self._step_size = value
+            @step_size.setter
+            def step_size(self, value: float) -> None:
+                self._step_size = value
 
-        @property
-        def value(self) -> float:
-            return self._value
+            @property
+            def value(self) -> float:
+                return self._value
 
-        @value.setter
-        def value(self, value: float) -> None:
-            if value < self._min or value > self._max:
-                raise ValueError(
-                    "Value is either below allowed min or above max value."
-                )
+            @value.setter
+            def value(self, value: float) -> None:
+                if value < self._min or value > self._max:
+                    raise ValueError(
+                        "Value is either below allowed min or above max value."
+                    )
 
-            self._value = value
+                self._value = value
 
-    class MyService(pydase.DataService):
-        def __init__(self) -> None:
-            self.voltage = MyService()
+        class MyService(pydase.DataService):
+            def __init__(self) -> None:
+                self.voltage = MyService()
 
-    # Modifying or accessing the voltage value:
-    my_service = MyService()
-    my_service.voltage.value = 5
-    print(my_service.voltage.value)  # Output: 5
-    ```
+        # Modifying or accessing the voltage value:
+        my_service = MyService()
+        my_service.voltage.value = 5
+        print(my_service.voltage.value)  # Output: 5
+        ```
     """
 
     def __init__(

src/pydase/config.py

@@ -5,19 +5,31 @@ from confz import BaseConfig, EnvSource
 
 
 class OperationMode(BaseConfig):  # type: ignore[misc]
-    environment: Literal["development", "production"] = "development"
+    environment: Literal["testing", "development", "production"] = "development"
+    """The service's operation mode."""
 
     CONFIG_SOURCES = EnvSource(allow=["ENVIRONMENT"])
 
 
 class ServiceConfig(BaseConfig):  # type: ignore[misc]
+    """Service configuration.
+
+    Variables can be set through environment variables prefixed with `SERVICE_` or an
+    `.env` file containing those variables.
+    """
+
     config_dir: Path = Path("config")
+    """Configuration directory"""
     web_port: int = 8001
+    """Web server port"""
 
     CONFIG_SOURCES = EnvSource(allow_all=True, prefix="SERVICE_", file=".env")
 
 
 class WebServerConfig(BaseConfig):  # type: ignore[misc]
+    """The service's web server configuration."""
+
     generate_web_settings: bool = False
+    """Should generate web_settings.json file"""
 
     CONFIG_SOURCES = EnvSource(allow=["GENERATE_WEB_SETTINGS"])

src/pydase/data_service/abstract_data_service.py

@@ -1,15 +1,7 @@
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any
-
 from pydase.observer_pattern.observable.observable import Observable
 
-if TYPE_CHECKING:
-    from pydase.data_service.data_service import DataService
-    from pydase.data_service.task_manager import TaskManager
-
 
 class AbstractDataService(Observable):
-    __root__: DataService
-    _task_manager: TaskManager
-    _autostart_tasks: dict[str, tuple[Any]]
+    pass

src/pydase/data_service/data_service.py

@@ -5,7 +5,6 @@ from typing import Any
 
 import pydase.units as u
 from pydase.data_service.abstract_data_service import AbstractDataService
-from pydase.data_service.task_manager import TaskManager
 from pydase.observer_pattern.observable.observable import (
     Observable,
 )
@@ -24,11 +23,6 @@ logger = logging.getLogger(__name__)
 class DataService(AbstractDataService):
     def __init__(self) -> None:
         super().__init__()
-        self._task_manager = TaskManager(self)
-
-        if not hasattr(self, "_autostart_tasks"):
-            self._autostart_tasks = {}
-
         self.__check_instance_classes()
 
     def __setattr__(self, __name: str, __value: Any) -> None:

src/pydase/data_service/data_service_cache.py

@@ -2,8 +2,6 @@ import logging
 from typing import TYPE_CHECKING, Any, cast
 
 from pydase.utils.serialization.serializer import (
-    SerializationPathError,
-    SerializationValueError,
     SerializedObject,
     get_nested_dict_by_path,
     set_nested_value_by_path,
@@ -38,16 +36,7 @@ class DataServiceCache:
         )
 
     def get_value_dict_from_cache(self, full_access_path: str) -> SerializedObject:
-        try:
-            return get_nested_dict_by_path(
-                cast(dict[str, SerializedObject], self._cache["value"]),
-                full_access_path,
-            )
-        except (SerializationPathError, SerializationValueError, KeyError):
-            return {
-                "full_access_path": full_access_path,
-                "value": None,
-                "type": "None",
-                "doc": None,
-                "readonly": False,
-            }
+        return get_nested_dict_by_path(
+            cast(dict[str, SerializedObject], self._cache["value"]),
+            full_access_path,
+        )

src/pydase/data_service/data_service_observer.py

@@ -9,7 +9,11 @@ from pydase.observer_pattern.observer.property_observer import (
     PropertyObserver,
 )
 from pydase.utils.helpers import get_object_attr_from_path
-from pydase.utils.serialization.serializer import SerializedObject, dump
+from pydase.utils.serialization.serializer import (
+    SerializationPathError,
+    SerializedObject,
+    dump,
+)
 
 logger = logging.getLogger(__name__)
 
@@ -29,23 +33,34 @@ class DataServiceObserver(PropertyObserver):
             for changing_attribute in self.changing_attributes
         ):
             return
+        cached_value_dict: SerializedObject
 
-        cached_value_dict = deepcopy(
-            self.state_manager._data_service_cache.get_value_dict_from_cache(
-                full_access_path
+        try:
+            cached_value_dict = deepcopy(
+                self.state_manager.cache_manager.get_value_dict_from_cache(
+                    full_access_path
+                )
             )
-        )
+        except (SerializationPathError, KeyError):
+            cached_value_dict = {
+                "full_access_path": full_access_path,
+                "value": None,
+                "type": "None",
+                "doc": None,
+                "readonly": False,
+            }
 
         cached_value = cached_value_dict.get("value")
-        if cached_value != dump(value)["value"] and all(
-            part[0] != "_" for part in full_access_path.split(".")
+        if (
+            all(part[0] != "_" for part in full_access_path.split("."))
+            and cached_value != dump(value)["value"]
         ):
             logger.debug("'%s' changed to '%s'", full_access_path, value)
 
             self._update_cache_value(full_access_path, value, cached_value_dict)
 
             cached_value_dict = deepcopy(
-                self.state_manager._data_service_cache.get_value_dict_from_cache(
+                self.state_manager.cache_manager.get_value_dict_from_cache(
                     full_access_path
                 )
             )
@@ -78,7 +93,7 @@ class DataServiceObserver(PropertyObserver):
                 value_dict["type"],
                 cached_value_dict["type"],
             )
-        self.state_manager._data_service_cache.update_cache(
+        self.state_manager.cache_manager.update_cache(
             full_access_path,
             value,
         )
@@ -109,8 +124,10 @@ class DataServiceObserver(PropertyObserver):
         object.
 
         Args:
-            callback (Callable[[str, Any, dict[str, Any]]): The callback function to be
-            registered. The function should have the following signature:
+            callback:
+                The callback function to be registered. The function should have the
+                following signature:
+
                 - full_access_path (str): The full dot-notation access path of the
                   changed attribute. This path indicates the location of the changed
                   attribute within the observable object's structure.

src/pydase/data_service/state_manager.py

@@ -1,3 +1,4 @@
+import contextlib
 import json
 import logging
 import os
@@ -32,17 +33,19 @@ def load_state(func: Callable[..., Any]) -> Callable[..., Any]:
     the value should be loaded from the JSON file.
 
     Example:
-    >>>     class Service(pydase.DataService):
-    ...         _name = "Service"
-    ...
-    ...         @property
-    ...         def name(self) -> str:
-    ...             return self._name
-    ...
-    ...         @name.setter
-    ...         @load_state
-    ...         def name(self, value: str) -> None:
-    ...             self._name = value
+        ```python
+        class Service(pydase.DataService):
+            _name = "Service"
+
+            @property
+            def name(self) -> str:
+                return self._name
+
+            @name.setter
+            @load_state
+            def name(self, value: str) -> None:
+                self._name = value
+        ```
     """
 
     func._load_state = True  # type: ignore[attr-defined]
@@ -84,13 +87,11 @@ class StateManager:
     StateManager provides a snapshot of the DataService's state that is sufficiently
     accurate for initial rendering and interaction.
 
-    Attributes:
-        cache (dict[str, Any]):
-            A dictionary cache of the DataService's state.
-        filename (str):
-            The file name used for storing the DataService's state.
-        service (DataService):
+    Args:
+        service:
             The DataService instance whose state is being managed.
+        filename:
+            The file name used for storing the DataService's state.
 
     Note:
         The StateManager's cache updates are triggered by notifications and do not
@@ -113,19 +114,12 @@ class StateManager:
             self.filename = filename
 
         self.service = service
-        self._data_service_cache = DataServiceCache(self.service)
-
-    @property
-    def cache(self) -> SerializedObject:
-        """Returns the cached DataService state."""
-        return self._data_service_cache.cache
+        self.cache_manager = DataServiceCache(self.service)
 
     @property
     def cache_value(self) -> dict[str, SerializedObject]:
         """Returns the "value" value of the DataService serialization."""
-        return cast(
-            dict[str, SerializedObject], self._data_service_cache.cache["value"]
-        )
+        return cast(dict[str, SerializedObject], self.cache_manager.cache["value"])
 
     def save_state(self) -> None:
         """
@@ -157,9 +151,18 @@ class StateManager:
         for path in generate_serialized_data_paths(json_dict):
             if self.__is_loadable_state_attribute(path):
                 nested_json_dict = get_nested_dict_by_path(json_dict, path)
-                nested_class_dict = self._data_service_cache.get_value_dict_from_cache(
-                    path
-                )
+                try:
+                    nested_class_dict = self.cache_manager.get_value_dict_from_cache(
+                        path
+                    )
+                except (SerializationPathError, KeyError):
+                    nested_class_dict = {
+                        "full_access_path": path,
+                        "value": None,
+                        "type": "None",
+                        "doc": None,
+                        "readonly": False,
+                    }
 
                 value_type = nested_json_dict["type"]
                 class_attr_value_type = nested_class_dict.get("type", None)
@@ -197,17 +200,23 @@ class StateManager:
         It also handles type-specific conversions for the new value before setting it.
 
         Args:
-            path: A dot-separated string indicating the hierarchical path to the
+            path:
+                A dot-separated string indicating the hierarchical path to the
                 attribute.
-            value: The new value to set for the attribute.
+            serialized_value:
+                The serialized representation of the new value to set for the attribute.
         """
 
-        current_value_dict = get_nested_dict_by_path(self.cache_value, path)
-
-        # This will also filter out methods as they are 'read-only'
-        if current_value_dict["readonly"]:
-            logger.debug("Attribute '%s' is read-only. Ignoring new value...", path)
-            return
+        try:
+            current_value_dict = self.cache_manager.get_value_dict_from_cache(path)
+        except (SerializationPathError, KeyError):
+            current_value_dict = {
+                "full_access_path": path,
+                "value": None,
+                "type": "None",
+                "doc": None,
+                "readonly": False,
+            }
 
         if "full_access_path" not in serialized_value:
             # Backwards compatibility for JSON files not containing the
@@ -237,24 +246,21 @@ class StateManager:
     def __update_attribute_by_path(
         self, path: str, serialized_value: SerializedObject
     ) -> None:
+        is_value_set = False
         path_parts = parse_full_access_path(path)
         target_obj = get_object_by_path_parts(self.service, path_parts[:-1])
 
-        attr_cache_type = get_nested_dict_by_path(self.cache_value, path)["type"]
-
-        # De-serialize the value
-        if attr_cache_type in ("ColouredEnum", "Enum"):
+        if self.__cached_value_is_enum(path):
             enum_attr = get_object_by_path_parts(target_obj, [path_parts[-1]])
             # take the value of the existing enum class
             if serialized_value["type"] in ("ColouredEnum", "Enum"):
-                try:
+                # This error will arise when setting an enum from another enum class.
+                # In this case, we resort to loading the enum and setting it directly.
+                with contextlib.suppress(KeyError):
                     value = enum_attr.__class__[serialized_value["value"]]
-                except KeyError:
-                    # This error will arise when setting an enum from another enum class
-                    # In this case, we resort to loading the enum and setting it
-                    # directly
-                    value = loads(serialized_value)
-        else:
+                    is_value_set = True
+
+        if not is_value_set:
             value = loads(serialized_value)
 
         # set the value
@@ -262,6 +268,15 @@ class StateManager:
             processed_key = parse_serialized_key(path_parts[-1])
             target_obj[processed_key] = value  # type: ignore
         else:
+            # Don't allow adding attributes to objects through state manager
+            if self.__attr_exists_on_target_obj(
+                target_obj=target_obj, name=path_parts[-1]
+            ):
+                raise AttributeError(
+                    f"{target_obj.__class__.__name__!r} object has no attribute "
+                    f"{path_parts[-1]!r}"
+                )
+
             setattr(target_obj, path_parts[-1], value)
 
     def __is_loadable_state_attribute(self, full_access_path: str) -> bool:
@@ -287,8 +302,8 @@ class StateManager:
             return has_decorator
 
         try:
-            cached_serialization_dict = get_nested_dict_by_path(
-                self.cache_value, full_access_path
+            cached_serialization_dict = self.cache_manager.get_value_dict_from_cache(
+                full_access_path
             )
 
             if cached_serialization_dict["value"] == "method":
@@ -303,3 +318,16 @@ class StateManager:
                 path_parts[-1],
             )
             return False
+
+    def __cached_value_is_enum(self, path: str) -> bool:
+        try:
+            attr_cache_type = self.cache_manager.get_value_dict_from_cache(path)["type"]
+
+            return attr_cache_type in ("ColouredEnum", "Enum")
+        except Exception:
+            return False
+
+    def __attr_exists_on_target_obj(self, target_obj: Any, name: str) -> bool:
+        return not is_property_attribute(target_obj, name) and not hasattr(
+            target_obj, name
+        )

src/pydase/data_service/task_manager.py

@@ -1,225 +0,0 @@
-from __future__ import annotations
-
-import asyncio
-import inspect
-import logging
-from enum import Enum
-from typing import TYPE_CHECKING, Any
-
-from pydase.data_service.abstract_data_service import AbstractDataService
-from pydase.utils.helpers import (
-    function_has_arguments,
-    get_class_and_instance_attributes,
-    is_property_attribute,
-)
-
-if TYPE_CHECKING:
-    from collections.abc import Callable
-
-    from .data_service import DataService
-
-logger = logging.getLogger(__name__)
-
-
-class TaskStatus(Enum):
-    RUNNING = "running"
-
-
-class TaskManager:
-    """
-    The TaskManager class is a utility designed to manage asynchronous tasks. It
-    provides functionality for starting, stopping, and tracking these tasks. The class
-    is primarily used by the DataService class to manage its tasks.
-
-    A task in TaskManager is any asynchronous function. To add a task, you simply need
-    to define an async function within your class that extends TaskManager. For example:
-
-    ```python
-    class MyService(DataService):
-        async def my_task(self):
-            # Your task implementation here
-            pass
-    ```
-
-    With the above definition, TaskManager automatically creates `start_my_task` and
-    `stop_my_task` methods that can be used to control the task.
-
-    TaskManager also supports auto-starting tasks. If there are tasks that should start
-    running as soon as an instance of your class is created, you can define them in
-    `self._autostart_tasks` in your class constructor (__init__ method). Here's how:
-
-    ```python
-    class MyService(DataService):
-        def __init__(self):
-            self._autostart_tasks = {
-                "my_task": (*args)  # Replace with actual arguments
-            }
-            self.wait_time = 1
-            super().__init__()
-
-        async def my_task(self, *args):
-            while True:
-                # Your task implementation here
-                await asyncio.sleep(self.wait_time)
-    ```
-
-    In the above example, `my_task` will start running as soon as
-    `_start_autostart_tasks` is called which is done when the DataService instance is
-    passed to the `pydase.Server` class.
-
-    The responsibilities of the TaskManager class are:
-
-    - Track all running tasks: Keeps track of all the tasks that are currently running.
-    This allows for monitoring of task statuses and for making sure tasks do not
-    overlap.
-    - Provide the ability to start and stop tasks: Automatically creates methods to
-    start and stop each task.
-    - Emit notifications when the status of a task changes: Has a built-in mechanism for
-    emitting notifications when a task starts or stops. This is used to update the user
-    interfaces, but can also be used to write logs, etc.
-    """
-
-    def __init__(self, service: DataService) -> None:
-        self.service = service
-
-        self.tasks: dict[str, asyncio.Task[None]] = {}
-        """A dictionary to keep track of running tasks. The keys are the names of the
-        tasks and the values are TaskDict instances which include the task itself and
-        its kwargs.
-        """
-
-        self._set_start_and_stop_for_async_methods()
-
-    @property
-    def _loop(self) -> asyncio.AbstractEventLoop:
-        return asyncio.get_running_loop()
-
-    def _set_start_and_stop_for_async_methods(self) -> None:
-        for name in dir(self.service):
-            # circumvents calling properties
-            if is_property_attribute(self.service, name):
-                continue
-
-            method = getattr(self.service, name)
-            if inspect.iscoroutinefunction(method):
-                if function_has_arguments(method):
-                    logger.info(
-                        "Async function %a is defined with at least one argument. If "
-                        "you want to use it as a task, remove the argument(s) from the "
-                        "function definition.",
-                        method.__name__,
-                    )
-                    continue
-
-                # create start and stop methods for each coroutine
-                setattr(
-                    self.service, f"start_{name}", self._make_start_task(name, method)
-                )
-                setattr(self.service, f"stop_{name}", self._make_stop_task(name))
-
-    def _initiate_task_startup(self) -> None:
-        if self.service._autostart_tasks is not None:
-            for service_name, args in self.service._autostart_tasks.items():
-                start_method = getattr(self.service, f"start_{service_name}", None)
-                if start_method is not None and callable(start_method):
-                    start_method(*args)
-                else:
-                    logger.warning(
-                        "No start method found for service '%s'", service_name
-                    )
-
-    def start_autostart_tasks(self) -> None:
-        self._initiate_task_startup()
-        attrs = get_class_and_instance_attributes(self.service)
-
-        for attr_value in attrs.values():
-            if isinstance(attr_value, AbstractDataService):
-                attr_value._task_manager.start_autostart_tasks()
-            elif isinstance(attr_value, list):
-                for item in attr_value:
-                    if isinstance(item, AbstractDataService):
-                        item._task_manager.start_autostart_tasks()
-
-    def _make_stop_task(self, name: str) -> Callable[..., Any]:
-        """
-        Factory function to create a 'stop_task' function for a running task.
-
-        The generated function cancels the associated asyncio task using 'name' for
-        identification, ensuring proper cleanup. Avoids closure and late binding issues.
-
-        Args:
-            name (str): The name of the coroutine task, used for its identification.
-        """
-
-        def stop_task() -> None:
-            # cancel the task
-            task = self.tasks.get(name, None)
-            if task is not None:
-                self._loop.call_soon_threadsafe(task.cancel)
-
-        return stop_task
-
-    def _make_start_task(
-        self, name: str, method: Callable[..., Any]
-    ) -> Callable[..., Any]:
-        """
-        Factory function to create a 'start_task' function for a coroutine.
-
-        The generated function starts the coroutine as an asyncio task, handling
-        registration and monitoring.
-        It uses 'name' and 'method' to avoid the closure and late binding issue.
-
-        Args:
-            name (str): The name of the coroutine, used for task management.
-            method (callable): The coroutine to be turned into an asyncio task.
-        """
-
-        def start_task() -> None:
-            def task_done_callback(task: asyncio.Task[None], name: str) -> None:
-                """Handles tasks that have finished.
-
-                Removes a task from the tasks dictionary, calls the defined
-                callbacks, and logs and re-raises exceptions."""
-
-                # removing the finished task from the tasks i
-                self.tasks.pop(name, None)
-
-                # emit the notification that the task was stopped
-                self.service._notify_changed(name, None)
-
-                exception = task.exception()
-                if exception is not None:
-                    # Handle the exception, or you can re-raise it.
-                    logger.error(
-                        "Task '%s' encountered an exception: %s: %s",
-                        name,
-                        type(exception).__name__,
-                        exception,
-                    )
-                    raise exception
-
-            async def task() -> None:
-                try:
-                    await method()
-                except asyncio.CancelledError:
-                    logger.info("Task '%s' was cancelled", name)
-
-            if not self.tasks.get(name):
-                # creating the task and adding the task_done_callback which checks
-                # if an exception has occured during the task execution
-                task_object = self._loop.create_task(task())
-                task_object.add_done_callback(
-                    lambda task: task_done_callback(task, name)
-                )
-
-                # Store the task and its arguments in the '__tasks' dictionary. The
-                # key is the name of the method, and the value is a dictionary
-                # containing the task object and the updated keyword arguments.
-                self.tasks[name] = task_object
-
-                # emit the notification that the task was started
-                self.service._notify_changed(name, TaskStatus.RUNNING)
-            else:
-                logger.error("Task '%s' is already running!", name)
-
-        return start_task

src/pydase/frontend/asset-manifest.json

@@ -1,13 +0,0 @@
-{
-  "files": {
-    "main.css": "/static/css/main.7ef670d5.css",
-    "main.js": "/static/js/main.57f8ec4c.js",
-    "index.html": "/index.html",
-    "main.7ef670d5.css.map": "/static/css/main.7ef670d5.css.map",
-    "main.57f8ec4c.js.map": "/static/js/main.57f8ec4c.js.map"
-  },
-  "entrypoints": [
-    "static/css/main.7ef670d5.css",
-    "static/js/main.57f8ec4c.js"
-  ]
-}

src/pydase/frontend/index.html

@@ -1 +1,18 @@
-<!doctype html><html lang="en"><head><meta charset="utf-8"/><link rel="icon" href="/favicon.ico"/><meta name="viewport" content="width=device-width,initial-scale=1"/><meta name="theme-color" content="#000000"/><meta name="description" content="Web site displaying a pydase UI."/><link rel="apple-touch-icon" href="/logo192.png"/><link rel="manifest" href="/manifest.json"/><title>pydase App</title><script defer="defer" src="/static/js/main.57f8ec4c.js"></script><link href="/static/css/main.7ef670d5.css" rel="stylesheet"></head><body><noscript>You need to enable JavaScript to run this app.</noscript><div id="root"></div></body></html>
+<!doctype html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta name="theme-color" content="#000000" />
+    <meta name="description" content="Web site displaying a pydase UI." />
+  <script type="module" crossorigin src="/assets/index-BjsjosWf.js"></script>
+  <link rel="stylesheet" crossorigin href="/assets/index-D2aktF3W.css">
+</head>
+
+<body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+</body>
+
+</html>

src/pydase/frontend/manifest.json

@@ -1,25 +0,0 @@
-{
-  "short_name": "React App",
-  "name": "Create React App Sample",
-  "icons": [
-    {
-      "src": "favicon.ico",
-      "sizes": "64x64 32x32 24x24 16x16",
-      "type": "image/x-icon"
-    },
-    {
-      "src": "logo192.png",
-      "type": "image/png",
-      "sizes": "192x192"
-    },
-    {
-      "src": "logo512.png",
-      "type": "image/png",
-      "sizes": "512x512"
-    }
-  ],
-  "start_url": ".",
-  "display": "standalone",
-  "theme_color": "#000000",
-  "background_color": "#ffffff"
-}

src/pydase/frontend/robots.txt

@@ -1,3 +0,0 @@
-# https://www.robotstxt.org/robotstxt.html
-User-agent: *
-Disallow:

src/pydase/frontend/static/js/main.57f8ec4c.js.LICENSE.txt

@@ -1,45 +0,0 @@
-/*!
-	Copyright (c) 2018 Jed Watson.
-	Licensed under the MIT License (MIT), see
-	http://jedwatson.github.io/classnames
-*/
-
-/**
- * @license React
- * react-dom.production.min.js
- *
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-/**
- * @license React
- * react-jsx-runtime.production.min.js
- *
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-/**
- * @license React
- * react.production.min.js
- *
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
-
-/**
- * @license React
- * scheduler.production.min.js
- *
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */

src/pydase/observer_pattern/observable/decorators.py

@@ -0,0 +1,99 @@
+import time
+from collections.abc import Callable
+from typing import TYPE_CHECKING, Any, ParamSpec, TypeVar
+
+if TYPE_CHECKING:
+    from pydase.observer_pattern.observable.observable import Observable
+
+P = ParamSpec("P")
+R = TypeVar("R")
+
+
+def validate_set(
+    *, timeout: float = 0.1, precision: float | None = None
+) -> Callable[[Callable[P, R]], Callable[P, R]]:
+    """
+    Decorator marking a property setter to read back the set value using the property
+    getter and check against the desired value.
+
+    Args:
+        timeout:
+            The maximum time (in seconds) to wait for the value to be within the
+            precision boundary.
+        precision:
+            The acceptable deviation from the desired value. If None, the value must be
+            exact.
+    """
+
+    def validate_set_decorator(func: Callable[P, R]) -> Callable[P, R]:
+        def wrapper(*args: P.args, **kwargs: P.kwargs) -> R:
+            return func(*args, **kwargs)
+
+        wrapper._validate_kwargs = {  # type: ignore
+            "timeout": timeout,
+            "precision": precision,
+        }
+
+        return wrapper
+
+    return validate_set_decorator
+
+
+def has_validate_set_decorator(prop: property) -> bool:
+    """
+    Checks if a property setter has been decorated with the `validate_set` decorator.
+
+    Args:
+        prop:
+            The property to check.
+
+    Returns:
+        True if the property setter has the `validate_set` decorator, False otherwise.
+    """
+
+    property_setter = prop.fset
+    return hasattr(property_setter, "_validate_kwargs")
+
+
+def _validate_value_was_correctly_set(
+    *,
+    obj: "Observable",
+    name: str,
+    value: Any,
+) -> None:
+    """
+    Validates if the property `name` of `obj` attains the desired `value` within the
+    specified `precision` and time `timeout`.
+
+    Args:
+        obj:
+            The instance of the class containing the property.
+        name:
+            The name of the property to validate.
+        value:
+            The desired value to check against.
+
+    Raises:
+        ValueError:
+            If the property value does not match the desired value within the specified
+            precision and timeout.
+    """
+
+    prop: property = getattr(type(obj), name)
+
+    timeout = prop.fset._validate_kwargs["timeout"]  # type: ignore
+    precision = prop.fset._validate_kwargs["precision"]  # type: ignore
+    if precision is None:
+        precision = 0.0
+
+    start_time = time.time()
+    while time.time() - start_time < timeout:
+        current_value = obj.__getattribute__(name)
+        # This check is faster than rounding and comparing to 0
+        if abs(current_value - value) <= precision:
+            return
+        time.sleep(0.01)
+    raise ValueError(
+        f"Failed to set value to {value} within {timeout} seconds. Current value: "
+        f"{current_value}."
+    )

src/pydase/observer_pattern/observable/observable.py

@@ -1,8 +1,12 @@
 import logging
 from typing import Any
 
+from pydase.observer_pattern.observable.decorators import (
+    _validate_value_was_correctly_set,
+    has_validate_set_decorator,
+)
 from pydase.observer_pattern.observable.observable_object import ObservableObject
-from pydase.utils.helpers import is_property_attribute
+from pydase.utils.helpers import is_descriptor, is_property_attribute
 
 logger = logging.getLogger(__name__)
 
@@ -20,6 +24,11 @@ class Observable(ObservableObject):
         for name, value in class_attrs.items():
             if isinstance(value, property) or callable(value):
                 continue
+            if is_descriptor(value):
+                # Descriptors have to be stored as a class variable in another class to
+                # work properly. So don't make it an instance attribute.
+                self._initialise_new_objects(name, value)
+                continue
             self.__dict__[name] = self._initialise_new_objects(name, value)
 
     def __setattr__(self, name: str, value: Any) -> None:
@@ -35,7 +44,12 @@ class Observable(ObservableObject):
 
         super().__setattr__(name, value)
 
-        self._notify_changed(name, value)
+        if is_property_attribute(self, name) and has_validate_set_decorator(
+            getattr(type(self), name)
+        ):
+            _validate_value_was_correctly_set(obj=self, name=name, value=value)
+        else:
+            self._notify_changed(name, value)
 
     def __getattribute__(self, name: str) -> Any:
         if is_property_attribute(self, name):

src/pydase/observer_pattern/observable/observable_object.py

@@ -166,8 +166,7 @@ class _ObservableList(ObservableObject, list[Any]):
 
     def append(self, __object: Any) -> None:
         self._notify_change_start("")
-        self._initialise_new_objects(f"[{len(self)}]", __object)
-        super().append(__object)
+        super().append(self._initialise_new_objects(f"[{len(self)}]", __object))
         self._notify_changed("", self)
 
     def clear(self) -> None:

src/pydase/observer_pattern/observer/observer.py

@@ -24,8 +24,7 @@ class Observer(ABC):
         self.on_change_start(changing_attribute)
 
     @abstractmethod
-    def on_change(self, full_access_path: str, value: Any) -> None:
-        ...
+    def on_change(self, full_access_path: str, value: Any) -> None: ...
 
     def on_change_start(self, full_access_path: str) -> None:
         return

src/pydase/observer_pattern/observer/property_observer.py

@@ -60,7 +60,7 @@ class PropertyObserver(Observer):
     def _process_nested_observables_properties(
         self, obj: Observable, deps: dict[str, Any], prefix: str
     ) -> None:
-        for k, value in vars(obj).items():
+        for k, value in {**vars(type(obj)), **vars(obj)}.items():
             prefix = (
                 f"{prefix}." if prefix != "" and not prefix.endswith(".") else prefix
             )

src/pydase/server/server.py

@@ -2,18 +2,26 @@ import asyncio
 import logging
 import os
 import signal
+import sys
 import threading
 from pathlib import Path
 from types import FrameType
 from typing import Any, Protocol, TypedDict
 
-from uvicorn.server import HANDLED_SIGNALS
-
 from pydase import DataService
 from pydase.config import ServiceConfig
 from pydase.data_service.data_service_observer import DataServiceObserver
 from pydase.data_service.state_manager import StateManager
 from pydase.server.web_server import WebServer
+from pydase.task.autostart import autostart_service_tasks
+from pydase.utils.helpers import current_event_loop_exists
+
+HANDLED_SIGNALS = (
+    signal.SIGINT,  # Unix signal 2. Sent by Ctrl+C.
+    signal.SIGTERM,  # Unix signal 15. Sent by `kill <pid>`.
+)
+if sys.platform == "win32":  # pragma: py-not-win32
+    HANDLED_SIGNALS += (signal.SIGBREAK,)  # Windows signal 21. Sent by Ctrl+Break.
 
 logger = logging.getLogger(__name__)
 
@@ -29,18 +37,18 @@ class AdditionalServerProtocol(Protocol):
 
     Args:
         data_service_observer:
-          Observer for the DataService, handling state updates and communication to
-          connected clients through injected callbacks. Can be utilized to access the
-          service and state manager, and to add custom state-update callbacks.
+            Observer for the DataService, handling state updates and communication to
+            connected clients through injected callbacks. Can be utilized to access the
+            service and state manager, and to add custom state-update callbacks.
         host:
-          Hostname or IP address where the server is accessible. Commonly '0.0.0.0' to
-          bind to all network interfaces.
+            Hostname or IP address where the server is accessible. Commonly '0.0.0.0' to
+            bind to all network interfaces.
         port:
-          Port number on which the server listens. Typically in the range 1024-65535
-          (non-standard ports).
+            Port number on which the server listens. Typically in the range 1024-65535
+            (non-standard ports).
         **kwargs:
-          Any additional parameters required for initializing the server. These
-          parameters are specific to the server's implementation.
+            Any additional parameters required for initializing the server. These
+            parameters are specific to the server's implementation.
     """
 
     def __init__(
@@ -58,18 +66,17 @@ class AdditionalServerProtocol(Protocol):
 
 
 class AdditionalServer(TypedDict):
-    """
-    A TypedDict that represents the configuration for an additional server to be run
+    """A TypedDict that represents the configuration for an additional server to be run
     alongside the main server.
-
-    This class is used to specify the server type, the port on which the server should
-    run, and any additional keyword arguments that should be passed to the server when
-    it's instantiated.
     """
 
     server: type[AdditionalServerProtocol]
+    """Server adhering to the
+    [`AdditionalServerProtocol`][pydase.server.server.AdditionalServerProtocol]."""
     port: int
+    """Port on which the server should run."""
     kwargs: dict[str, Any]
+    """Additional keyword arguments that will be passed to the server's constructor """
 
 
 class Server:
@@ -77,29 +84,20 @@ class Server:
     The `Server` class provides a flexible server implementation for the `DataService`.
 
     Args:
-        service: DataService
+        service:
             The DataService instance that this server will manage.
-        host: str
-            The host address for the server. Default is '0.0.0.0', which means all
+        host:
+            The host address for the server. Defaults to `'0.0.0.0'`, which means all
             available network interfaces.
-        web_port: int
-            The port number for the web server. Default is
-            `pydase.config.ServiceConfig().web_port`.
-        enable_web: bool
-            Whether to enable the web server. Default is True.
-        filename: str | Path | None
+        web_port:
+            The port number for the web server. Defaults to
+            [`ServiceConfig().web_port`][pydase.config.ServiceConfig.web_port].
+        enable_web:
+            Whether to enable the web server.
+        filename:
             Filename of the file managing the service state persistence.
-            Defaults to None.
-        additional_servers : list[AdditionalServer]
-            A list of additional servers to run alongside the main server. Each entry in
-            the list should be a dictionary with the following structure:
-                - server: A class that adheres to the AdditionalServerProtocol. This
-                    class should have an `__init__` method that accepts the DataService
-                    instance, port, host, and optional keyword arguments, and a `serve`
-                    method that is a coroutine responsible for starting the server.
-                - port: The port on which the additional server will be running.
-                - kwargs: A dictionary containing additional keyword arguments that will
-                    be passed to the server's `__init__` method.
+        additional_servers:
+            A list of additional servers to run alongside the main server.
 
             Here's an example of how you might define an additional server:
 
@@ -139,8 +137,8 @@ class Server:
             )
             server.run()
             ```
-        **kwargs: Any
-          Additional keyword arguments.
+        **kwargs:
+            Additional keyword arguments.
     """
 
     def __init__(  # noqa: PLR0913
@@ -160,13 +158,18 @@ class Server:
         self._web_port = web_port
         self._enable_web = enable_web
         self._kwargs = kwargs
-        self._loop: asyncio.AbstractEventLoop
         self._additional_servers = additional_servers
         self.should_exit = False
         self.servers: dict[str, asyncio.Future[Any]] = {}
         self._state_manager = StateManager(self._service, filename)
         self._observer = DataServiceObserver(self._state_manager)
         self._state_manager.load_state()
+        autostart_service_tasks(self._service)
+        if not current_event_loop_exists():
+            self._loop = asyncio.new_event_loop()
+            asyncio.set_event_loop(self._loop)
+        else:
+            self._loop = asyncio.get_event_loop()
 
     def run(self) -> None:
         """
@@ -174,7 +177,7 @@ class Server:
 
         This method should be called to start the server after it's been instantiated.
         """
-        asyncio.run(self.serve())
+        self._loop.run_until_complete(self.serve())
 
     async def serve(self) -> None:
         process_id = os.getpid()
@@ -190,10 +193,8 @@ class Server:
         logger.info("Finished server process [%s]", process_id)
 
     async def startup(self) -> None:
-        self._loop = asyncio.get_running_loop()
         self._loop.set_exception_handler(self.custom_exception_handler)
         self.install_signal_handlers()
-        self._service._task_manager.start_autostart_tasks()
 
         for server in self._additional_servers:
             addin_server = server["server"](
@@ -207,8 +208,9 @@ class Server:
                 addin_server.__module__ + "." + addin_server.__class__.__name__
             )
 
-            future_or_task = self._loop.create_task(addin_server.serve())
-            self.servers[server_name] = future_or_task
+            server_task = self._loop.create_task(addin_server.serve())
+            server_task.add_done_callback(self._handle_server_shutdown)
+            self.servers[server_name] = server_task
         if self._enable_web:
             self._web_server = WebServer(
                 data_service_observer=self._observer,
@@ -216,8 +218,22 @@ class Server:
                 port=self._web_port,
                 **self._kwargs,
             )
-            future_or_task = self._loop.create_task(self._web_server.serve())
-            self.servers["web"] = future_or_task
+            server_task = self._loop.create_task(self._web_server.serve())
+
+            server_task.add_done_callback(self._handle_server_shutdown)
+            self.servers["web"] = server_task
+
+    def _handle_server_shutdown(self, task: asyncio.Task[Any]) -> None:
+        """Handle server shutdown. If the service should exit, do nothing. Else, make
+        the service exit."""
+
+        if self.should_exit:
+            return
+
+        try:
+            task.result()
+        except Exception:
+            self.should_exit = True
 
     async def main_loop(self) -> None:
         while not self.should_exit:
@@ -229,7 +245,9 @@ class Server:
         logger.info("Saving data to %s.", self._state_manager.filename)
         self._state_manager.save_state()
 
+        logger.debug("Cancelling servers")
         await self.__cancel_servers()
+        logger.debug("Cancelling tasks")
         await self.__cancel_tasks()
 
     async def __cancel_servers(self) -> None:
@@ -240,7 +258,7 @@ class Server:
             except asyncio.CancelledError:
                 logger.debug("Cancelled '%s' server.", server_name)
             except Exception as e:
-                logger.warning("Unexpected exception: %s", e)
+                logger.error("Unexpected exception: %s", e)
 
     async def __cancel_tasks(self) -> None:
         for task in asyncio.all_tasks(self._loop):