Add information on uploaded media to user export command. (#15107)

synapse/handlers/admin.py

@@ -252,16 +252,19 @@ class AdminHandler:
         profile = await self.get_user(UserID.from_string(user_id))
         if profile is not None:
             writer.write_profile(profile)
+            logger.info("[%s] Written profile", user_id)
 
         # Get all devices the user has
         devices = await self._device_handler.get_devices_by_user(user_id)
         writer.write_devices(devices)
+        logger.info("[%s] Written %s devices", user_id, len(devices))
 
         # Get all connections the user has
         connections = await self.get_whois(UserID.from_string(user_id))
         writer.write_connections(
             connections["devices"][""]["sessions"][0]["connections"]
         )
+        logger.info("[%s] Written %s connections", user_id, len(connections))
 
         # Get all account data the user has global and in rooms
         global_data = await self._store.get_global_account_data_for_user(user_id)
@@ -269,6 +272,29 @@ class AdminHandler:
         writer.write_account_data("global", global_data)
         for room_id in by_room_data:
             writer.write_account_data(room_id, by_room_data[room_id])
+        logger.info(
+            "[%s] Written account data for %s rooms", user_id, len(by_room_data)
+        )
+
+        # Get all media ids the user has
+        limit = 100
+        start = 0
+        while True:
+            media_ids, total = await self._store.get_local_media_by_user_paginate(
+                start, limit, user_id
+            )
+            for media in media_ids:
+                writer.write_media_id(media["media_id"], media)
+
+            logger.info(
+                "[%s] Written %d media_ids of %s",
+                user_id,
+                (start + len(media_ids)),
+                total,
+            )
+            if (start + limit) >= total:
+                break
+            start += limit
 
         return writer.finished()
 
@@ -359,6 +385,18 @@ class ExfiltrationWriter(metaclass=abc.ABCMeta):
         """
         raise NotImplementedError()
 
+    @abc.abstractmethod
+    def write_media_id(self, media_id: str, media_metadata: JsonDict) -> None:
+        """Write the media's metadata of a user.
+        Exports only the metadata, as this can be fetched from the database via
+        read only. In order to access the files, a connection to the correct
+        media repository would be required.
+
+        Args:
+            media_id: ID of the media.
+            media_metadata: Metadata of one media file.
+        """
+
     @abc.abstractmethod
     def finished(self) -> Any:
         """Called when all data has successfully been exported and written.