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# Copyright 2014-2016 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 TYPE_CHECKING, Iterator, Tuple
import attr
from synapse.handlers.account_data import AccountDataEventSource
from synapse.handlers.presence import PresenceEventSource
from synapse.handlers.receipts import ReceiptEventSource
from synapse.handlers.room import RoomEventSource
from synapse.handlers.typing import TypingNotificationEventSource
from synapse.streams import EventSource
from synapse.types import StreamToken
if TYPE_CHECKING:
from synapse.server import HomeServer
@attr.s(frozen=True, slots=True, auto_attribs=True)
class _EventSourcesInner:
room: RoomEventSource
presence: PresenceEventSource
typing: TypingNotificationEventSource
receipt: ReceiptEventSource
account_data: AccountDataEventSource
def get_sources(self) -> Iterator[Tuple[str, EventSource]]:
for attribute in attr.fields(_EventSourcesInner):
yield attribute.name, getattr(self, attribute.name)
class EventSources:
def __init__(self, hs: "HomeServer"):
self.sources = _EventSourcesInner(
# mypy thinks attribute.type is `Optional`, but we know it's never `None` here since
# all the attributes of `_EventSourcesInner` are annotated.
*(attribute.type(hs) for attribute in attr.fields(_EventSourcesInner)) # type: ignore[misc]
)
self.store = hs.get_datastore()
def get_current_token(self) -> StreamToken:
push_rules_key = self.store.get_max_push_rules_stream_id()
to_device_key = self.store.get_to_device_stream_token()
device_list_key = self.store.get_device_stream_token()
groups_key = self.store.get_group_stream_token()
token = StreamToken(
room_key=self.sources.room.get_current_key(),
presence_key=self.sources.presence.get_current_key(),
typing_key=self.sources.typing.get_current_key(),
receipt_key=self.sources.receipt.get_current_key(),
account_data_key=self.sources.account_data.get_current_key(),
push_rules_key=push_rules_key,
to_device_key=to_device_key,
device_list_key=device_list_key,
groups_key=groups_key,
)
return token
def get_current_token_for_pagination(self) -> StreamToken:
"""Get the current token for a given room to be used to paginate
events.
The returned token does not have the current values for fields other
than `room`, since they are not used during pagination.
Returns:
The current token for pagination.
"""
token = StreamToken(
room_key=self.sources.room.get_current_key(),
presence_key=0,
typing_key=0,
receipt_key=0,
account_data_key=0,
push_rules_key=0,
to_device_key=0,
device_list_key=0,
groups_key=0,
)
return token
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