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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.
import logging
import random
from typing import TYPE_CHECKING, Awaitable, Callable, Collection, List, Optional, Tuple
from synapse.replication.http.account_data import (
ReplicationAddTagRestServlet,
ReplicationRemoveTagRestServlet,
ReplicationRoomAccountDataRestServlet,
ReplicationUserAccountDataRestServlet,
)
from synapse.streams import EventSource
from synapse.types import JsonDict, StreamKeyType, UserID
if TYPE_CHECKING:
from synapse.server import HomeServer
logger = logging.getLogger(__name__)
ON_ACCOUNT_DATA_UPDATED_CALLBACK = Callable[
[str, Optional[str], str, JsonDict], Awaitable
]
class AccountDataHandler:
def __init__(self, hs: "HomeServer"):
self._store = hs.get_datastores().main
self._instance_name = hs.get_instance_name()
self._notifier = hs.get_notifier()
self._user_data_client = ReplicationUserAccountDataRestServlet.make_client(hs)
self._room_data_client = ReplicationRoomAccountDataRestServlet.make_client(hs)
self._add_tag_client = ReplicationAddTagRestServlet.make_client(hs)
self._remove_tag_client = ReplicationRemoveTagRestServlet.make_client(hs)
self._account_data_writers = hs.config.worker.writers.account_data
self._on_account_data_updated_callbacks: List[
ON_ACCOUNT_DATA_UPDATED_CALLBACK
] = []
def register_module_callbacks(
self, on_account_data_updated: Optional[ON_ACCOUNT_DATA_UPDATED_CALLBACK] = None
) -> None:
"""Register callbacks from modules."""
if on_account_data_updated is not None:
self._on_account_data_updated_callbacks.append(on_account_data_updated)
async def _notify_modules(
self,
user_id: str,
room_id: Optional[str],
account_data_type: str,
content: JsonDict,
) -> None:
"""Notifies modules about new account data changes.
A change can be either a new account data type being added, or the content
associated with a type being changed. Account data for a given type is removed by
changing the associated content to an empty dictionary.
Note that this is not called when the tags associated with a room change.
Args:
user_id: The user whose account data is changing.
room_id: The ID of the room the account data change concerns, if any.
account_data_type: The type of the account data.
content: The content that is now associated with this type.
"""
for callback in self._on_account_data_updated_callbacks:
try:
await callback(user_id, room_id, account_data_type, content)
except Exception as e:
logger.exception("Failed to run module callback %s: %s", callback, e)
async def add_account_data_to_room(
self, user_id: str, room_id: str, account_data_type: str, content: JsonDict
) -> int:
"""Add some account_data to a room for a user.
Args:
user_id: The user to add a tag for.
room_id: The room to add a tag for.
account_data_type: The type of account_data to add.
content: A json object to associate with the tag.
Returns:
The maximum stream ID.
"""
if self._instance_name in self._account_data_writers:
max_stream_id = await self._store.add_account_data_to_room(
user_id, room_id, account_data_type, content
)
self._notifier.on_new_event(
StreamKeyType.ACCOUNT_DATA, max_stream_id, users=[user_id]
)
await self._notify_modules(user_id, room_id, account_data_type, content)
return max_stream_id
else:
response = await self._room_data_client(
instance_name=random.choice(self._account_data_writers),
user_id=user_id,
room_id=room_id,
account_data_type=account_data_type,
content=content,
)
return response["max_stream_id"]
async def add_account_data_for_user(
self, user_id: str, account_data_type: str, content: JsonDict
) -> int:
"""Add some global account_data for a user.
Args:
user_id: The user to add a tag for.
account_data_type: The type of account_data to add.
content: A json object to associate with the tag.
Returns:
The maximum stream ID.
"""
if self._instance_name in self._account_data_writers:
max_stream_id = await self._store.add_account_data_for_user(
user_id, account_data_type, content
)
self._notifier.on_new_event(
StreamKeyType.ACCOUNT_DATA, max_stream_id, users=[user_id]
)
await self._notify_modules(user_id, None, account_data_type, content)
return max_stream_id
else:
response = await self._user_data_client(
instance_name=random.choice(self._account_data_writers),
user_id=user_id,
account_data_type=account_data_type,
content=content,
)
return response["max_stream_id"]
async def add_tag_to_room(
self, user_id: str, room_id: str, tag: str, content: JsonDict
) -> int:
"""Add a tag to a room for a user.
Args:
user_id: The user to add a tag for.
room_id: The room to add a tag for.
tag: The tag name to add.
content: A json object to associate with the tag.
Returns:
The next account data ID.
"""
if self._instance_name in self._account_data_writers:
max_stream_id = await self._store.add_tag_to_room(
user_id, room_id, tag, content
)
self._notifier.on_new_event(
StreamKeyType.ACCOUNT_DATA, max_stream_id, users=[user_id]
)
return max_stream_id
else:
response = await self._add_tag_client(
instance_name=random.choice(self._account_data_writers),
user_id=user_id,
room_id=room_id,
tag=tag,
content=content,
)
return response["max_stream_id"]
async def remove_tag_from_room(self, user_id: str, room_id: str, tag: str) -> int:
"""Remove a tag from a room for a user.
Returns:
The next account data ID.
"""
if self._instance_name in self._account_data_writers:
max_stream_id = await self._store.remove_tag_from_room(
user_id, room_id, tag
)
self._notifier.on_new_event(
StreamKeyType.ACCOUNT_DATA, max_stream_id, users=[user_id]
)
return max_stream_id
else:
response = await self._remove_tag_client(
instance_name=random.choice(self._account_data_writers),
user_id=user_id,
room_id=room_id,
tag=tag,
)
return response["max_stream_id"]
class AccountDataEventSource(EventSource[int, JsonDict]):
def __init__(self, hs: "HomeServer"):
self.store = hs.get_datastores().main
def get_current_key(self, direction: str = "f") -> int:
return self.store.get_max_account_data_stream_id()
async def get_new_events(
self,
user: UserID,
from_key: int,
limit: Optional[int],
room_ids: Collection[str],
is_guest: bool,
explicit_room_id: Optional[str] = None,
) -> Tuple[List[JsonDict], int]:
user_id = user.to_string()
last_stream_id = from_key
current_stream_id = self.store.get_max_account_data_stream_id()
results = []
tags = await self.store.get_updated_tags(user_id, last_stream_id)
for room_id, room_tags in tags.items():
results.append(
{"type": "m.tag", "content": {"tags": room_tags}, "room_id": room_id}
)
(
account_data,
room_account_data,
) = await self.store.get_updated_account_data_for_user(user_id, last_stream_id)
for account_data_type, content in account_data.items():
results.append({"type": account_data_type, "content": content})
for room_id, account_data in room_account_data.items():
for account_data_type, content in account_data.items():
results.append(
{"type": account_data_type, "content": content, "room_id": room_id}
)
return results, current_stream_id
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