✨(backend) notify collaboration server

When an access is updated or removed, the
collaboration server is notified to reset the
access connection; by being disconnected, the
accesses will automatically reconnect by passing
by the ngnix subrequest, and so get the good
rights.
We do the same system when the document link is
updated, except here we reset every access
connection.

src/backend/core/services/collaboration_services.py

@@ -0,0 +1,42 @@
+"""Collaboration services."""
+
+from django.conf import settings
+from django.core.exceptions import ImproperlyConfigured
+
+import requests
+
+
+class CollaborationService:
+    """Service class for Collaboration related operations."""
+
+    def __init__(self):
+        """Ensure that the collaboration configuration is set properly."""
+        if settings.COLLABORATION_API_URL is None:
+            raise ImproperlyConfigured("Collaboration configuration not set")
+
+    def reset_connections(self, room, user_id=None):
+        """
+        Reset connections of a room in the collaboration server.
+        Reseting a connection means that the user will be disconnected and will
+        have to reconnect to the collaboration server, with updated rights.
+        """
+        endpoint = "reset-connections"
+
+        # room is necessary as a parameter, it is easier to stick to the
+        # same pod thanks to a parameter
+        endpoint_url = f"{settings.COLLABORATION_API_URL}{endpoint}/?room={room}"
+
+        headers = {"Authorization": settings.COLLABORATION_SERVER_SECRET}
+        if user_id:
+            headers["X-User-Id"] = user_id
+
+        try:
+            response = requests.post(endpoint_url, headers=headers, timeout=10)
+        except requests.RequestException as e:
+            raise requests.HTTPError("Failed to notify WebSocket server.") from e
+
+        if response.status_code != 200:
+            raise requests.HTTPError(
+                f"Failed to notify WebSocket server. Status code: {response.status_code}, "
+                f"Response: {response.text}"
+            )