# Copyright 2022 Beeper
#
# 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.


"""
Forces through the `current_state_events_membership` background job so checks
for its completion can be removed.

Note the background job must still remain defined in the database class.
"""
from synapse.config.homeserver import HomeServerConfig
from synapse.storage.database import LoggingTransaction
from synapse.storage.engines import BaseDatabaseEngine


def run_upgrade(
    cur: LoggingTransaction,
    database_engine: BaseDatabaseEngine,
    config: HomeServerConfig,
) -> None:
    cur.execute("SELECT update_name FROM background_updates")
    rows = cur.fetchall()
    for row in rows:
        if row[0] == "current_state_events_membership":
            break
    # No pending background job so nothing to do here
    else:
        return

    # Populate membership field for all current_state_events, this may take
    # a while but was originally handled via a background update in 2019.
    cur.execute(
        """
        UPDATE current_state_events
        SET membership = (
            SELECT membership FROM room_memberships
            WHERE event_id = current_state_events.event_id
        )
        """
    )

    # Finally, delete the background job because we've handled it above
    cur.execute(
        """
        DELETE FROM background_updates
        WHERE update_name = 'current_state_events_membership'
        """
    )