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https://git.anonymousland.org/anonymousland/synapse-product.git
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c66a06ac6b
This is in preparation for having multiple data stores that offer different functionality, e.g. splitting out state or event storage.
92 lines
3.0 KiB
Python
92 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2018 New Vector Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import operator
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from synapse.storage._base import SQLBaseStore
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from synapse.util.caches.descriptors import cached, cachedList
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class UserErasureWorkerStore(SQLBaseStore):
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@cached()
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def is_user_erased(self, user_id):
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"""
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Check if the given user id has requested erasure
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Args:
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user_id (str): full user id to check
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Returns:
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Deferred[bool]: True if the user has requested erasure
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"""
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return self._simple_select_onecol(
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table="erased_users",
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keyvalues={"user_id": user_id},
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retcol="1",
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desc="is_user_erased",
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).addCallback(operator.truth)
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@cachedList(
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cached_method_name="is_user_erased", list_name="user_ids", inlineCallbacks=True
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)
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def are_users_erased(self, user_ids):
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"""
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Checks which users in a list have requested erasure
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Args:
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user_ids (iterable[str]): full user id to check
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Returns:
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Deferred[dict[str, bool]]:
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for each user, whether the user has requested erasure.
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"""
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# this serves the dual purpose of (a) making sure we can do len and
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# iterate it multiple times, and (b) avoiding duplicates.
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user_ids = tuple(set(user_ids))
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rows = yield self._simple_select_many_batch(
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table="erased_users",
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column="user_id",
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iterable=user_ids,
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retcols=("user_id",),
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desc="are_users_erased",
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)
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erased_users = set(row["user_id"] for row in rows)
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res = dict((u, u in erased_users) for u in user_ids)
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return res
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class UserErasureStore(UserErasureWorkerStore):
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def mark_user_erased(self, user_id):
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"""Indicate that user_id wishes their message history to be erased.
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Args:
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user_id (str): full user_id to be erased
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"""
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def f(txn):
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# first check if they are already in the list
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txn.execute("SELECT 1 FROM erased_users WHERE user_id = ?", (user_id,))
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if txn.fetchone():
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return
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# they are not already there: do the insert.
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txn.execute("INSERT INTO erased_users (user_id) VALUES (?)", (user_id,))
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self._invalidate_cache_and_stream(txn, self.is_user_erased, (user_id,))
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return self.runInteraction("mark_user_erased", f)
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