291 lines
10 KiB
Python
291 lines
10 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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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 logging
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from typing import Dict, List, Tuple
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from synapse.storage._base import db_to_json
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from synapse.storage.databases.main.account_data import AccountDataWorkerStore
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from synapse.types import JsonDict
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from synapse.util import json_encoder
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from synapse.util.caches.descriptors import cached
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logger = logging.getLogger(__name__)
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class TagsWorkerStore(AccountDataWorkerStore):
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@cached()
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async def get_tags_for_user(self, user_id: str) -> Dict[str, Dict[str, JsonDict]]:
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"""Get all the tags for a user.
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Args:
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user_id: The user to get the tags for.
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Returns:
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A mapping from room_id strings to dicts mapping from tag strings to
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tag content.
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"""
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rows = await self.db_pool.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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tags_by_room = {} # type: Dict[str, Dict[str, JsonDict]]
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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"]] = db_to_json(row["content"])
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return tags_by_room
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async def get_all_updated_tags(
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self, instance_name: str, last_id: int, current_id: int, limit: int
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) -> Tuple[List[Tuple[int, tuple]], int, bool]:
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"""Get updates for tags replication stream.
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Args:
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instance_name: The writer we want to fetch updates from. Unused
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here since there is only ever one writer.
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last_id: The token to fetch updates from. Exclusive.
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current_id: The token to fetch updates up to. Inclusive.
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limit: The requested limit for the number of rows to return. The
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function may return more or fewer rows.
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Returns:
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A tuple consisting of: the updates, a token to use to fetch
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subsequent updates, and whether we returned fewer rows than exists
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between the requested tokens due to the limit.
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The token returned can be used in a subsequent call to this
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function to get further updatees.
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The updates are a list of 2-tuples of stream ID and the row data
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"""
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if last_id == current_id:
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return [], current_id, False
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def get_all_updated_tags_txn(txn):
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sql = (
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"SELECT stream_id, user_id, room_id"
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" FROM room_tags_revisions as r"
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" WHERE ? < stream_id AND stream_id <= ?"
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" ORDER BY stream_id ASC LIMIT ?"
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)
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txn.execute(sql, (last_id, current_id, limit))
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return txn.fetchall()
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tag_ids = await self.db_pool.runInteraction(
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"get_all_updated_tags", get_all_updated_tags_txn
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)
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def get_tag_content(txn, tag_ids):
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sql = "SELECT tag, content FROM room_tags WHERE user_id=? AND room_id=?"
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results = []
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for stream_id, user_id, room_id in tag_ids:
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txn.execute(sql, (user_id, room_id))
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tags = []
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for tag, content in txn:
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tags.append(json_encoder.encode(tag) + ":" + content)
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tag_json = "{" + ",".join(tags) + "}"
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results.append((stream_id, (user_id, room_id, tag_json)))
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return results
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batch_size = 50
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results = []
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for i in range(0, len(tag_ids), batch_size):
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tags = await self.db_pool.runInteraction(
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"get_all_updated_tag_content",
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get_tag_content,
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tag_ids[i : i + batch_size],
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)
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results.extend(tags)
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limited = False
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upto_token = current_id
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if len(results) >= limit:
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upto_token = results[-1][0]
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limited = True
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return results, upto_token, limited
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async def get_updated_tags(
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self, user_id: str, stream_id: int
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) -> Dict[str, Dict[str, JsonDict]]:
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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 mapping from room_id strings to lists of tag strings for all the
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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]
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return room_ids
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changed = self._account_data_stream_cache.has_entity_changed(
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user_id, int(stream_id)
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)
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if not changed:
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return {}
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room_ids = await self.db_pool.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 = await 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.get(room_id, {})
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return results
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async def get_tags_for_room(
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self, user_id: str, room_id: str
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) -> Dict[str, JsonDict]:
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"""Get all the tags for the given room
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Args:
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user_id: The user to get tags for
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room_id: The room to get tags for
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Returns:
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A mapping of tags to tag content.
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"""
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rows = await self.db_pool.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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)
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return {row["tag"]: db_to_json(row["content"]) for row in rows}
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class TagsStore(TagsWorkerStore):
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async def add_tag_to_room(
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self, user_id: str, room_id: str, tag: str, content: JsonDict
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) -> int:
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"""Add a tag to a room for a user.
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Args:
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user_id: The user to add a tag for.
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room_id: The room to add a tag for.
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tag: The tag name to add.
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content: A json object to associate with the tag.
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Returns:
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The next account data ID.
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"""
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content_json = json_encoder.encode(content)
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def add_tag_txn(txn, next_id):
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self.db_pool.simple_upsert_txn(
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txn,
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table="room_tags",
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keyvalues={"user_id": user_id, "room_id": room_id, "tag": tag},
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values={"content": content_json},
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)
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self._update_revision_txn(txn, user_id, room_id, next_id)
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async with self._account_data_id_gen.get_next() as next_id:
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await self.db_pool.runInteraction("add_tag", add_tag_txn, next_id)
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self.get_tags_for_user.invalidate((user_id,))
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return self._account_data_id_gen.get_current_token()
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async def remove_tag_from_room(self, user_id: str, room_id: str, tag: str) -> int:
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"""Remove a tag from a room for a user.
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Returns:
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The next account data ID.
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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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async with self._account_data_id_gen.get_next() as next_id:
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await self.db_pool.runInteraction("remove_tag", remove_tag_txn, next_id)
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self.get_tags_for_user.invalidate((user_id,))
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return self._account_data_id_gen.get_current_token()
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def _update_revision_txn(
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self, txn, user_id: str, room_id: str, next_id: int
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) -> None:
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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: The ID of the user.
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room_id: The ID of the room.
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next_id: The the revision to advance to.
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"""
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txn.call_after(
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self._account_data_stream_cache.entity_has_changed, user_id, next_id
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)
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# Note: This is only here for backwards compat to allow admins to
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# roll back to a previous Synapse version. Next time we update the
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# database version we can remove this table.
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update_max_id_sql = (
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"UPDATE account_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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