mirror of
https://mau.dev/maunium/synapse.git
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217 lines
7.5 KiB
Python
217 lines
7.5 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014, 2015 OpenMarket 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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from ._base import SQLBaseStore
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from synapse.util.caches.descriptors import cached
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from twisted.internet import defer
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from .util.id_generators import StreamIdGenerator
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import ujson as json
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import logging
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logger = logging.getLogger(__name__)
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class TagsStore(SQLBaseStore):
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def __init__(self, hs):
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super(TagsStore, self).__init__(hs)
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self._private_user_data_id_gen = StreamIdGenerator(
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"private_user_data_max_stream_id", "stream_id"
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)
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def get_max_private_user_data_stream_id(self):
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"""Get the current max stream id for the private user data stream
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Returns:
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A deferred int.
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"""
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return self._private_user_data_id_gen.get_max_token(self)
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@cached()
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def get_tags_for_user(self, user_id):
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"""Get all the tags for a user.
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Args:
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user_id(str): The user to get the tags for.
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Returns:
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A deferred dict mapping from room_id strings to lists of tag
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strings.
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"""
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deferred = self._simple_select_list(
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"room_tags", {"user_id": user_id}, ["room_id", "tag", "content"]
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)
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@deferred.addCallback
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def tags_by_room(rows):
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tags_by_room = {}
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for row in rows:
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room_tags = tags_by_room.setdefault(row["room_id"], {})
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room_tags[row["tag"]] = json.loads(row["content"])
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return tags_by_room
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return deferred
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@defer.inlineCallbacks
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def get_updated_tags(self, user_id, stream_id):
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"""Get all the tags for the rooms where the tags have changed since the
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given version
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Args:
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user_id(str): The user to get the tags for.
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stream_id(int): The earliest update to get for the user.
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Returns:
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A deferred dict mapping from room_id strings to lists of tag
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strings for all the rooms that changed since the stream_id token.
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"""
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def get_updated_tags_txn(txn):
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sql = (
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"SELECT room_id from room_tags_revisions"
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" WHERE user_id = ? AND stream_id > ?"
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)
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txn.execute(sql, (user_id, stream_id))
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room_ids = [row[0] for row in txn.fetchall()]
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return room_ids
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room_ids = yield self.runInteraction(
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"get_updated_tags", get_updated_tags_txn
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)
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results = {}
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if room_ids:
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tags_by_room = yield self.get_tags_for_user(user_id)
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for room_id in room_ids:
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results[room_id] = tags_by_room[room_id]
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defer.returnValue(results)
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def get_tags_for_room(self, user_id, room_id):
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"""Get all the tags for the given room
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Args:
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user_id(str): The user to get tags for
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room_id(str): The room to get tags for
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Returns:
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A deferred list of string tags.
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"""
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return self._simple_select_list(
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table="room_tags",
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keyvalues={"user_id": user_id, "room_id": room_id},
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retcols=("tag", "content"),
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desc="get_tags_for_room",
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).addCallback(lambda rows: {
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row["tag"]: json.loads(row["content"]) for row in rows
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})
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@defer.inlineCallbacks
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def add_tag_to_room(self, user_id, room_id, tag, content):
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"""Add a tag to a room for a user.
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Args:
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user_id(str): The user to add a tag for.
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room_id(str): The room to add a tag for.
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tag(str): The tag name to add.
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content(dict): A json object to associate with the tag.
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Returns:
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A deferred that completes once the tag has been added.
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"""
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content_json = json.dumps(content)
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def add_tag_txn(txn, next_id):
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self._simple_upsert_txn(
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txn,
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table="room_tags",
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keyvalues={
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"user_id": user_id,
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"room_id": room_id,
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"tag": tag,
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},
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values={
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"content": content_json,
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}
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)
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self._update_revision_txn(txn, user_id, room_id, next_id)
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with (yield self._private_user_data_id_gen.get_next(self)) as next_id:
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yield self.runInteraction("add_tag", add_tag_txn, next_id)
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self.get_tags_for_user.invalidate((user_id,))
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result = yield self._private_user_data_id_gen.get_max_token(self)
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defer.returnValue(result)
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@defer.inlineCallbacks
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def remove_tag_from_room(self, user_id, room_id, tag):
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"""Remove a tag from a room for a user.
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Returns:
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A deferred that completes once the tag has been removed
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"""
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def remove_tag_txn(txn, next_id):
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sql = (
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"DELETE FROM room_tags "
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" WHERE user_id = ? AND room_id = ? AND tag = ?"
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)
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txn.execute(sql, (user_id, room_id, tag))
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self._update_revision_txn(txn, user_id, room_id, next_id)
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with (yield self._private_user_data_id_gen.get_next(self)) as next_id:
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yield self.runInteraction("remove_tag", remove_tag_txn, next_id)
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self.get_tags_for_user.invalidate((user_id,))
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result = yield self._private_user_data_id_gen.get_max_token(self)
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defer.returnValue(result)
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def _update_revision_txn(self, txn, user_id, room_id, next_id):
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"""Update the latest revision of the tags for the given user and room.
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Args:
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txn: The database cursor
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user_id(str): The ID of the user.
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room_id(str): The ID of the room.
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next_id(int): The the revision to advance to.
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"""
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update_max_id_sql = (
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"UPDATE private_user_data_max_stream_id"
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" SET stream_id = ?"
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" WHERE stream_id < ?"
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)
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txn.execute(update_max_id_sql, (next_id, next_id))
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update_sql = (
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"UPDATE room_tags_revisions"
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" SET stream_id = ?"
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" WHERE user_id = ?"
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" AND room_id = ?"
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)
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txn.execute(update_sql, (next_id, user_id, room_id))
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if txn.rowcount == 0:
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insert_sql = (
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"INSERT INTO room_tags_revisions (user_id, room_id, stream_id)"
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" VALUES (?, ?, ?)"
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)
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try:
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txn.execute(insert_sql, (user_id, room_id, next_id))
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except self.database_engine.module.IntegrityError:
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# Ignore insertion errors. It doesn't matter if the row wasn't
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# inserted because if two updates happend concurrently the one
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# with the higher stream_id will not be reported to a client
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# unless the previous update has completed. It doesn't matter
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# which stream_id ends up in the table, as long as it is higher
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# than the id that the client has.
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pass
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