feat: implement mute/unmute feature

Author: naincy128

lms/djangoapps/discussion/rest_api/api.py

@@ -152,14 +152,12 @@ def get_muted_user_ids(request_user, course_key):
         set: Set of user IDs that are muted (personal + course-wide)
     """
     try:
-        # Import forum integration here to avoid circular imports
         muted_ids = ForumIntegrationService.get_muted_user_ids_for_course(
             course_id=str(course_key),
             viewer_id=request_user.id
         )
-        return muted_ids
-
-    except Exception as e:  # pylint: disable=broad-except
+        return set(muted_ids) if muted_ids else set()
+    except Exception as e:  # pylint: disable=broad-exception-caught
         return set()
 
 

lms/djangoapps/discussion/rest_api/tests/test_views_v2.py

@@ -12,6 +12,7 @@
 import json
 from datetime import datetime
 from unittest import mock
+from unittest.mock import patch
 
 import ddt
 from forum.backends.mongodb.comments import Comment
@@ -216,7 +217,6 @@ def test_basic(self):
             "closed": False,
             "pinned": False,
             "editing_user_id": str(self.user.id),
-            "include_muted": None,
         }
         self.check_mock_called_with("update_thread", -1, **params)
 
@@ -524,7 +524,11 @@ def test_404(self):
             {"developer_message": "Course not found."}
         )
 
-    def test_basic(self):
+    @patch(
+        "lms.djangoapps.discussion.rest_api.api.ForumIntegrationService.get_muted_user_ids_for_course",
+        return_value=set()
+    )
+    def test_basic(self, mock_get_muted_user_ids):
         self.register_get_user_response(self.user, upvoted_ids=["test_thread"])
         source_threads = [
             self.create_source_thread(