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- # Copyright 2015, 2016 OpenMarket Ltd
- # Copyright 2021 The Matrix.org Foundation C.I.C.
- #
- # 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 Optional, Tuple, Union, cast
-
- from canonicaljson import encode_canonical_json
-
- from synapse.api.errors import Codes, SynapseError
- from synapse.storage._base import SQLBaseStore, db_to_json
- from synapse.storage.database import LoggingTransaction
- from synapse.types import JsonDict
- from synapse.util.caches.descriptors import cached
-
-
- class FilteringStore(SQLBaseStore):
- @cached(num_args=2)
- async def get_user_filter(
- self, user_localpart: str, filter_id: Union[int, str]
- ) -> JsonDict:
- # filter_id is BIGINT UNSIGNED, so if it isn't a number, fail
- # with a coherent error message rather than 500 M_UNKNOWN.
- try:
- int(filter_id)
- except ValueError:
- raise SynapseError(400, "Invalid filter ID", Codes.INVALID_PARAM)
-
- def_json = await self.db_pool.simple_select_one_onecol(
- table="user_filters",
- keyvalues={"user_id": user_localpart, "filter_id": filter_id},
- retcol="filter_json",
- allow_none=False,
- desc="get_user_filter",
- )
-
- return db_to_json(def_json)
-
- async def add_user_filter(self, user_localpart: str, user_filter: JsonDict) -> int:
- def_json = encode_canonical_json(user_filter)
-
- # Need an atomic transaction to SELECT the maximal ID so far then
- # INSERT a new one
- def _do_txn(txn: LoggingTransaction) -> int:
- sql = (
- "SELECT filter_id FROM user_filters "
- "WHERE user_id = ? AND filter_json = ?"
- )
- txn.execute(sql, (user_localpart, bytearray(def_json)))
- filter_id_response = txn.fetchone()
- if filter_id_response is not None:
- return filter_id_response[0]
-
- sql = "SELECT MAX(filter_id) FROM user_filters WHERE user_id = ?"
- txn.execute(sql, (user_localpart,))
- max_id = cast(Tuple[Optional[int]], txn.fetchone())[0]
- if max_id is None:
- filter_id = 0
- else:
- filter_id = max_id + 1
-
- sql = (
- "INSERT INTO user_filters (user_id, filter_id, filter_json)"
- "VALUES(?, ?, ?)"
- )
- txn.execute(sql, (user_localpart, filter_id, bytearray(def_json)))
-
- return filter_id
-
- return await self.db_pool.runInteraction("add_user_filter", _do_txn)
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