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-rw-r--r--synapse/server_notices/server_notices_manager.py51
1 files changed, 42 insertions, 9 deletions
diff --git a/synapse/server_notices/server_notices_manager.py b/synapse/server_notices/server_notices_manager.py
index f7432c8d2f..bf0943f265 100644
--- a/synapse/server_notices/server_notices_manager.py
+++ b/synapse/server_notices/server_notices_manager.py
@@ -17,7 +17,7 @@ import logging
 from twisted.internet import defer
 
 from synapse.api.constants import EventTypes, Membership, RoomCreationPreset
-from synapse.types import create_requester
+from synapse.types import UserID, create_requester
 from synapse.util.caches.descriptors import cachedInlineCallbacks
 
 logger = logging.getLogger(__name__)
@@ -36,10 +36,12 @@ class ServerNoticesManager(object):
         self._store = hs.get_datastore()
         self._config = hs.config
         self._room_creation_handler = hs.get_room_creation_handler()
+        self._room_member_handler = hs.get_room_member_handler()
         self._event_creation_handler = hs.get_event_creation_handler()
         self._is_mine_id = hs.is_mine_id
 
         self._notifier = hs.get_notifier()
+        self.server_notices_mxid = self._config.server_notices_mxid
 
     def is_enabled(self):
         """Checks if server notices are enabled on this server.
@@ -66,7 +68,8 @@ class ServerNoticesManager(object):
         Returns:
             Deferred[FrozenEvent]
         """
-        room_id = yield self.get_notice_room_for_user(user_id)
+        room_id = yield self.get_or_create_notice_room_for_user(user_id)
+        yield self.maybe_invite_user_to_room(user_id, room_id)
 
         system_mxid = self._config.server_notices_mxid
         requester = create_requester(system_mxid)
@@ -89,10 +92,11 @@ class ServerNoticesManager(object):
         return res
 
     @cachedInlineCallbacks()
-    def get_notice_room_for_user(self, user_id):
+    def get_or_create_notice_room_for_user(self, user_id):
         """Get the room for notices for a given user
 
-        If we have not yet created a notice room for this user, create it
+        If we have not yet created a notice room for this user, create it, but don't
+        invite the user to it.
 
         Args:
             user_id (str): complete user id for the user we want a room for
@@ -108,7 +112,6 @@ class ServerNoticesManager(object):
         rooms = yield self._store.get_rooms_for_local_user_where_membership_is(
             user_id, [Membership.INVITE, Membership.JOIN]
         )
-        system_mxid = self._config.server_notices_mxid
         for room in rooms:
             # it's worth noting that there is an asymmetry here in that we
             # expect the user to be invited or joined, but the system user must
@@ -116,10 +119,14 @@ class ServerNoticesManager(object):
             # manages to invite the system user to a room, that doesn't make it
             # the server notices room.
             user_ids = yield self._store.get_users_in_room(room.room_id)
-            if system_mxid in user_ids:
+            if self.server_notices_mxid in user_ids:
                 # we found a room which our user shares with the system notice
                 # user
-                logger.info("Using room %s", room.room_id)
+                logger.info(
+                    "Using existing server notices room %s for user %s",
+                    room.room_id,
+                    user_id,
+                )
                 return room.room_id
 
         # apparently no existing notice room: create a new one
@@ -138,14 +145,13 @@ class ServerNoticesManager(object):
                 "avatar_url": self._config.server_notices_mxid_avatar_url,
             }
 
-        requester = create_requester(system_mxid)
+        requester = create_requester(self.server_notices_mxid)
         info = yield self._room_creation_handler.create_room(
             requester,
             config={
                 "preset": RoomCreationPreset.PRIVATE_CHAT,
                 "name": self._config.server_notices_room_name,
                 "power_level_content_override": {"users_default": -10},
-                "invite": (user_id,),
             },
             ratelimit=False,
             creator_join_profile=join_profile,
@@ -159,3 +165,30 @@ class ServerNoticesManager(object):
 
         logger.info("Created server notices room %s for %s", room_id, user_id)
         return room_id
+
+    @defer.inlineCallbacks
+    def maybe_invite_user_to_room(self, user_id: str, room_id: str):
+        """Invite the given user to the given server room, unless the user has already
+        joined or been invited to it.
+
+        Args:
+            user_id: The ID of the user to invite.
+            room_id: The ID of the room to invite the user to.
+        """
+        requester = create_requester(self.server_notices_mxid)
+
+        # Check whether the user has already joined or been invited to this room. If
+        # that's the case, there is no need to re-invite them.
+        joined_rooms = yield self._store.get_rooms_for_local_user_where_membership_is(
+            user_id, [Membership.INVITE, Membership.JOIN]
+        )
+        for room in joined_rooms:
+            if room.room_id == room_id:
+                return
+
+        yield self._room_member_handler.update_membership(
+            requester=requester,
+            target=UserID.from_string(user_id),
+            room_id=room_id,
+            action="invite",
+        )