anonymousland-synapse/synapse/streams/events.py

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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.
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from typing import Any, Dict
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from synapse.handlers.account_data import AccountDataEventSource
from synapse.handlers.presence import PresenceEventSource
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from synapse.handlers.receipts import ReceiptEventSource
from synapse.handlers.room import RoomEventSource
from synapse.handlers.typing import TypingNotificationEventSource
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from synapse.types import StreamToken
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class EventSources:
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SOURCE_TYPES = {
"room": RoomEventSource,
"presence": PresenceEventSource,
"typing": TypingNotificationEventSource,
"receipt": ReceiptEventSource,
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"account_data": AccountDataEventSource,
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}
def __init__(self, hs):
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self.sources = {
name: cls(hs) for name, cls in EventSources.SOURCE_TYPES.items()
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} # type: Dict[str, Any]
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self.store = hs.get_datastore()
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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()
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groups_key = self.store.get_group_stream_token()
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token = StreamToken(
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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,
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groups_key=groups_key,
)
return token
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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:
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The current token for pagination.
"""
token = StreamToken(
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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