add backend function to retrieve list of excluded drives

Author: DenisaCG

jupyter_drives/handlers.py

@@ -49,6 +49,11 @@ class ConfigJupyterDrivesHandler(JupyterDrivesAPIHandler):
     def initialize(self, logger: logging.Logger, manager: JupyterDrivesManager):
         return super().initialize(logger, manager)
 
+    @tornado.web.authenticated
+    async def get(self):
+        result = self._manager.get_excluded_drives()
+        self.finish(json.dumps(result["data"]))
+
     @tornado.web.authenticated
     async def post(self):
         body = self.get_json_body()

jupyter_drives/manager.py

@@ -188,6 +188,33 @@ def exclude_drive(self, exclude_drive_name):
 
         return
 
+    def get_excluded_drives(self):
+        """Get list of excluded drives.
+
+        Returns: 
+            List of excluded drives and their properties.
+        """
+        data = []
+        for drive in self._excluded_drives:
+            try:
+                data.append({
+                    "name": drive,
+                    "region": self._config.region_name,
+                    "creationDate": datetime.now().isoformat(timespec='milliseconds').replace('+00:00', 'Z'),
+                    "mounted": False if drive not in self._content_managers else True,
+                    "provider": self._config.provider
+                })
+            except Exception as e:
+                raise tornado.web.HTTPError(
+                    status_code=httpx.codes.BAD_REQUEST,
+                    reason=f"The following error occured when listing excluded drives: {e}",
+                )
+        
+        response = {
+            "data": data
+        }
+        return response
+    
     def include_drive(self, include_drive_name):
         """Include drive in listing.