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Automatically delete empty groups/communities (#6453)

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Signed-off-by: Werner Sembach <werner.sembach@fau.de>
This commit is contained in:
Werner Sembach 2019-12-16 13:12:40 +01:00 committed by Andrew Morgan
parent 0b90fc6ed2
commit 9d173b312c
4 changed files with 38 additions and 0 deletions
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3
AUTHORS.rst
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@ -46,3 +46,6 @@ Joseph Weston <joseph at weston.cloud>
Benjamin Saunders <ben.e.saunders at gmail dot com>
* Documentation improvements
Werner Sembach <werner.sembach at fau dot de>
* Automatically remove a group/community when it is empty

1
changelog.d/6453.feature Normal file
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@ -0,0 +1 @@
Automatically delete empty groups/communities.

5
synapse/groups/groups_server.py
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@ -773,6 +773,11 @@ class GroupsServerHandler(object):
if not self.hs.is_mine_id(user_id):
yield self.store.maybe_delete_remote_profile_cache(user_id)
# Delete group if the last user has left
users = yield self.store.get_users_in_group(group_id, include_private=True)
if not users:
yield self.store.delete_group(group_id)
return {}
@defer.inlineCallbacks

29
synapse/storage/data_stores/main/schema/delta/56/nuke_empty_communities_from_db.sql Normal file
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@ -0,0 +1,29 @@
/* Copyright 2019 Werner Sembach
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
-- Groups/communities now get deleted when the last member leaves. This is a one time cleanup to remove old groups/communities that were already empty before that change was made.
DELETE FROM group_attestations_remote WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM group_attestations_renewals WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM group_invites WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM group_roles WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM group_room_categories WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM group_rooms WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM group_summary_roles WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM group_summary_room_categories WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM group_summary_rooms WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM group_summary_users WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM local_group_membership WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM local_group_updates WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));
DELETE FROM groups WHERE group_id IN (SELECT group_id FROM groups WHERE NOT EXISTS (SELECT group_id FROM group_users WHERE group_id = groups.group_id));