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# Copyright 2015, 2016 OpenMarket 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 Union
from canonicaljson import encode_canonical_json
from synapse.api.errors import Codes, SynapseError
from synapse.storage._base import SQLBaseStore, db_to_json
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):
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 = 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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