add backend functionality for including drive in listing

Author: DenisaCG

jupyter_drives/handlers.py

@@ -56,6 +56,8 @@ async def post(self):
             result = self._manager.set_listing_limit(**body)
         if 'exclude_drive_name' in body:
             result = self._manager.exclude_drive(**body)
+        if 'include_drive_name' in body:
+            result = self._manager.include_drive(**body)
         self.finish(result)
 
 class ListJupyterDrivesHandler(JupyterDrivesAPIHandler):

jupyter_drives/manager.py

@@ -188,6 +188,22 @@ def exclude_drive(self, exclude_drive_name):
 
         return
 
+    def include_drive(self, include_drive_name):
+        """Include drive in listing.
+
+        Args:
+            include_bucket_name: drive to include in listing
+        """
+        try:
+            self._excluded_drives.remove(include_drive_name);
+        except Exception as e:
+            raise tornado.web.HTTPError(
+            status_code= httpx.codes.BAD_REQUEST,
+            reason= f"The following error occured when excluding the drive: {e}"
+            )
+
+        return
+    
     async def list_drives(self): 
         """Get list of available drives.