110 lines
3.7 KiB
Python
110 lines
3.7 KiB
Python
# Copyright 2018 New Vector Ltd
|
|
#
|
|
# 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.
|
|
|
|
from typing import Iterable, List, Mapping, Tuple, cast
|
|
|
|
from synapse.storage.database import LoggingTransaction
|
|
from synapse.storage.databases.main import CacheInvalidationWorkerStore
|
|
from synapse.util.caches.descriptors import cached, cachedList
|
|
|
|
|
|
class UserErasureWorkerStore(CacheInvalidationWorkerStore):
|
|
@cached()
|
|
async def is_user_erased(self, user_id: str) -> bool:
|
|
"""
|
|
Check if the given user id has requested erasure
|
|
|
|
Args:
|
|
user_id: full user id to check
|
|
|
|
Returns:
|
|
True if the user has requested erasure
|
|
"""
|
|
result = await self.db_pool.simple_select_onecol(
|
|
table="erased_users",
|
|
keyvalues={"user_id": user_id},
|
|
retcol="1",
|
|
desc="is_user_erased",
|
|
)
|
|
return bool(result)
|
|
|
|
@cachedList(cached_method_name="is_user_erased", list_name="user_ids")
|
|
async def are_users_erased(self, user_ids: Iterable[str]) -> Mapping[str, bool]:
|
|
"""
|
|
Checks which users in a list have requested erasure
|
|
|
|
Args:
|
|
user_ids: full user ids to check
|
|
|
|
Returns:
|
|
for each user, whether the user has requested erasure.
|
|
"""
|
|
rows = cast(
|
|
List[Tuple[str]],
|
|
await self.db_pool.simple_select_many_batch(
|
|
table="erased_users",
|
|
column="user_id",
|
|
iterable=user_ids,
|
|
retcols=("user_id",),
|
|
desc="are_users_erased",
|
|
),
|
|
)
|
|
erased_users = {row[0] for row in rows}
|
|
|
|
return {u: u in erased_users for u in user_ids}
|
|
|
|
|
|
class UserErasureStore(UserErasureWorkerStore):
|
|
async def mark_user_erased(self, user_id: str) -> None:
|
|
"""Indicate that user_id wishes their message history to be erased.
|
|
|
|
Args:
|
|
user_id: full user_id to be erased
|
|
"""
|
|
|
|
def f(txn: LoggingTransaction) -> None:
|
|
# first check if they are already in the list
|
|
txn.execute("SELECT 1 FROM erased_users WHERE user_id = ?", (user_id,))
|
|
if txn.fetchone():
|
|
return
|
|
|
|
# they are not already there: do the insert.
|
|
txn.execute("INSERT INTO erased_users (user_id) VALUES (?)", (user_id,))
|
|
|
|
self._invalidate_cache_and_stream(txn, self.is_user_erased, (user_id,))
|
|
|
|
await self.db_pool.runInteraction("mark_user_erased", f)
|
|
|
|
async def mark_user_not_erased(self, user_id: str) -> None:
|
|
"""Indicate that user_id is no longer erased.
|
|
|
|
Args:
|
|
user_id: full user_id to be un-erased
|
|
"""
|
|
|
|
def f(txn: LoggingTransaction) -> None:
|
|
# first check if they are already in the list
|
|
txn.execute("SELECT 1 FROM erased_users WHERE user_id = ?", (user_id,))
|
|
if not txn.fetchone():
|
|
return
|
|
|
|
# They are there, delete them.
|
|
self.db_pool.simple_delete_one_txn(
|
|
txn, "erased_users", keyvalues={"user_id": user_id}
|
|
)
|
|
|
|
self._invalidate_cache_and_stream(txn, self.is_user_erased, (user_id,))
|
|
|
|
await self.db_pool.runInteraction("mark_user_not_erased", f)
|