COMMON: logger_config.py, added QT log handling to enable a logging panel in the GUI

common/src/aaredaqlib/logger_config.py

@@ -3,7 +3,24 @@ import logging.config
 import yaml
 import os
 
-def setup_logger(name="aaredaq", base_dir: str | None = None):
+from PySide6.QtCore import QObject, Signal
+
+class QtLogEmitter(QObject):
+    message = Signal(str)
+
+class QtLogHandler(logging.Handler):
+    def __init__(self, emitter: QtLogEmitter):
+        super().__init__()
+        self.emitter = emitter
+
+    def emit(self, record: logging.LogRecord):
+        try:
+            msg = self.format(record)
+            self.emitter.message.emit(msg)
+        except Exception:
+            self.handleError(record)
+
+def setup_logger(name="aaredaq", base_dir: str | None = '/tmp/mxlogs'):
     # switch to production mode using: $ APP_ENV=prod python main.py
     env = os.getenv("APP_ENV", "dev")  # default: dev
     config_file = (
@@ -41,4 +58,27 @@ def setup_logger(name="aaredaq", base_dir: str | None = None):
 
     logging.getLogger("redis_lock").setLevel(logging.WARNING)
     logging.getLogger("urllib3").setLevel(logging.WARNING)
+    logging.getLogger("matplotlib.font_manager").setLevel(logging.WARNING)
+    logging.getLogger("aaredaq").setLevel(logging.DEBUG)  # DAQ
+    logging.getLogger("aaregui").setLevel(logging.INFO)
     return logging.getLogger(name)
+
+def find_existing_formatter(default_fmt="%(asctime)s [%(levelname)s] %(name)s: %(message)s", default_datefmt=None):
+    root = logging.getLogger()
+    for h in root.handlers:
+        if h.formatter:
+            return h.formatter
+
+    for logger_name, logger in logging.Logger.manager.loggerDict.items():
+        if isinstance(logger, logging.Logger):
+            for h in logger.handlers:
+                if h.formatter:
+                    return h.formatter
+
+    return logging.Formatter(default_fmt, datefmt=default_datefmt)
+
+def attach_to_logger(logger_name: str = "", handler: logging.Handler = None):
+    logging.getLogger(logger_name).addHandler(handler)
+
+
+