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-rw-r--r--synapse/storage/databases/main/events_bg_updates.py7
-rw-r--r--synapse/storage/databases/main/media_repository.py51
-rw-r--r--synapse/storage/databases/main/schema/delta/58/22users_have_local_media.sql2
3 files changed, 60 insertions, 0 deletions
diff --git a/synapse/storage/databases/main/events_bg_updates.py b/synapse/storage/databases/main/events_bg_updates.py
index 5e4af2eb51..97b6754846 100644
--- a/synapse/storage/databases/main/events_bg_updates.py
+++ b/synapse/storage/databases/main/events_bg_updates.py
@@ -92,6 +92,13 @@ class EventsBackgroundUpdatesStore(SQLBaseStore):
             where_clause="NOT have_censored",
         )
 
+        self.db_pool.updates.register_background_index_update(
+            "users_have_local_media",
+            index_name="users_have_local_media",
+            table="local_media_repository",
+            columns=["user_id", "created_ts"],
+        )
+
     async def _background_reindex_fields_sender(self, progress, batch_size):
         target_min_stream_id = progress["target_min_stream_id_inclusive"]
         max_stream_id = progress["max_stream_id_exclusive"]
diff --git a/synapse/storage/databases/main/media_repository.py b/synapse/storage/databases/main/media_repository.py
index 7ef5f1bf2b..daf57675d8 100644
--- a/synapse/storage/databases/main/media_repository.py
+++ b/synapse/storage/databases/main/media_repository.py
@@ -116,6 +116,57 @@ class MediaRepositoryStore(MediaRepositoryBackgroundUpdateStore):
             desc="get_local_media",
         )
 
+    async def get_local_media_by_user_paginate(
+        self, start: int, limit: int, user_id: str
+    ) -> Tuple[List[Dict[str, Any]], int]:
+        """Get a paginated list of metadata for a local piece of media
+        which an user_id has uploaded
+
+        Args:
+            start: offset in the list
+            limit: maximum amount of media_ids to retrieve
+            user_id: fully-qualified user id
+        Returns:
+            A paginated list of all metadata of user's media,
+            plus the total count of all the user's media
+        """
+
+        def get_local_media_by_user_paginate_txn(txn):
+
+            args = [user_id]
+            sql = """
+                SELECT COUNT(*) as total_media
+                FROM local_media_repository
+                WHERE user_id = ?
+            """
+            txn.execute(sql, args)
+            count = txn.fetchone()[0]
+
+            sql = """
+                SELECT
+                    "media_id",
+                    "media_type",
+                    "media_length",
+                    "upload_name",
+                    "created_ts",
+                    "last_access_ts",
+                    "quarantined_by",
+                    "safe_from_quarantine"
+                FROM local_media_repository
+                WHERE user_id = ?
+                ORDER BY created_ts DESC, media_id DESC
+                LIMIT ? OFFSET ?
+            """
+
+            args += [limit, start]
+            txn.execute(sql, args)
+            media = self.db_pool.cursor_to_dict(txn)
+            return media, count
+
+        return await self.db_pool.runInteraction(
+            "get_local_media_by_user_paginate_txn", get_local_media_by_user_paginate_txn
+        )
+
     async def get_local_media_before(
         self, before_ts: int, size_gt: int, keep_profiles: bool,
     ) -> Optional[List[str]]:
diff --git a/synapse/storage/databases/main/schema/delta/58/22users_have_local_media.sql b/synapse/storage/databases/main/schema/delta/58/22users_have_local_media.sql
new file mode 100644
index 0000000000..a2842687f1
--- /dev/null
+++ b/synapse/storage/databases/main/schema/delta/58/22users_have_local_media.sql
@@ -0,0 +1,2 @@
+INSERT INTO background_updates (update_name, progress_json) VALUES
+  ('users_have_local_media', '{}');
\ No newline at end of file