first prototype

scilog/scicat.py

@@ -0,0 +1,69 @@
+import getpass
+from .config import Config
+from .utils import post_request, get_request
+from .autherror import AuthError
+
+
+AUTH_HEADERS = {
+    "Content-type": "application/json",
+    "Accept":       "application/json"
+}
+
+
+class SciCat:
+
+    def __init__(self, address):
+        self.address = address.rstrip("/")
+        self._token = None
+        self.config = Config(".scicat-tokens")
+
+    def __repr__(self):
+        return f"SciCat @ {self.address}"
+
+    @property
+    def proposals(self):
+        url = self.address + "/proposals"
+        headers = self.auth_headers
+        return get_request(url, headers=headers)
+
+
+    @property
+    def auth_headers(self):
+        headers = AUTH_HEADERS.copy()
+        headers["Authorization"] = self.token
+        return headers
+
+    @property
+    def token(self):
+        username = getpass.getuser()
+        password = getpass.getpass(prompt=f"SciCat password for {username}: ")
+        token = self._token
+        if token is None:
+            try:
+                token = self.config[username]
+            except KeyError:
+                token = self.authenticate(username, password)
+        self.config[username] = self._token = token
+        return token
+
+    def authenticate(self, username, password):
+        url = self.address + "/users/login"
+        auth_payload = {
+            "username": username,
+            "password": password
+        }
+        res = post_request(url, auth_payload, AUTH_HEADERS)
+        try:
+            token = res["id"]
+        except KeyError as e:
+            raise SciCatAuthError(res) from e
+        else:
+            return token
+
+
+
+class SciCatAuthError(AuthError):
+    pass
+
+
+