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# -*- coding: utf-8 -*-
# Copyright 2019 New Vector 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.
import attr
class EventFormatVersions(object):
"""This is an internal enum for tracking the version of the event format,
independently from the room version.
"""
V1 = 1 # $id:server event id format
V2 = 2 # MSC1659-style $hash event id format: introduced for room v3
V3 = 3 # MSC1884-style $hash format: introduced for room v4
KNOWN_EVENT_FORMAT_VERSIONS = {
EventFormatVersions.V1,
EventFormatVersions.V2,
EventFormatVersions.V3,
}
class StateResolutionVersions(object):
"""Enum to identify the state resolution algorithms"""
V1 = 1 # room v1 state res
V2 = 2 # MSC1442 state res: room v2 and later
class RoomDisposition(object):
STABLE = "stable"
UNSTABLE = "unstable"
@attr.s(slots=True, frozen=True)
class RoomVersion(object):
"""An object which describes the unique attributes of a room version."""
identifier = attr.ib() # str; the identifier for this version
disposition = attr.ib() # str; one of the RoomDispositions
event_format = attr.ib() # int; one of the EventFormatVersions
state_res = attr.ib() # int; one of the StateResolutionVersions
enforce_key_validity = attr.ib() # bool
class RoomVersions(object):
V1 = RoomVersion(
"1",
RoomDisposition.STABLE,
EventFormatVersions.V1,
StateResolutionVersions.V1,
enforce_key_validity=False,
)
V2 = RoomVersion(
"2",
RoomDisposition.STABLE,
EventFormatVersions.V1,
StateResolutionVersions.V2,
enforce_key_validity=False,
)
V3 = RoomVersion(
"3",
RoomDisposition.STABLE,
EventFormatVersions.V2,
StateResolutionVersions.V2,
enforce_key_validity=False,
)
V4 = RoomVersion(
"4",
RoomDisposition.STABLE,
EventFormatVersions.V3,
StateResolutionVersions.V2,
enforce_key_validity=False,
)
V5 = RoomVersion(
"5",
RoomDisposition.STABLE,
EventFormatVersions.V3,
StateResolutionVersions.V2,
enforce_key_validity=True,
)
KNOWN_ROOM_VERSIONS = {
v.identifier: v for v in (
RoomVersions.V1,
RoomVersions.V2,
RoomVersions.V3,
RoomVersions.V4,
RoomVersions.V5,
)
} # type: dict[str, RoomVersion]
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