Add room version upgrades

Implements https://github.com/matrix-org/matrix-doc/issues/1501
pull/1791/head
Travis Ralston 5 years ago
parent b067d671fb
commit b85f7bb248

@ -0,0 +1,95 @@
# 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.
swagger: '2.0'
info:
title: "Matrix Client-Server Room Upgrades API"
version: "1.0.0"
host: localhost:8008
schemes:
- https
- http
basePath: /_matrix/client/%CLIENT_MAJOR_VERSION%
consumes:
- application/json
produces:
- application/json
securityDefinitions:
$ref: definitions/security.yaml
paths:
"/rooms/{roomId}/upgrade":
post:
summary: Upgrades a room to a new room version.
description: |-
Upgrades the given room to a particular room version, migrating as much
data as possible over to the new room. See the `room_upgrades`_ module
for more information on what this entails.
operationId: upgradeRoom
security:
- accessToken: []
parameters:
- in: path
type: string
name: roomId
required: true
description: The ID of the room to upgrade.
x-example: "!oldroom:example.org"
- in: body
name: body
required: true
description: The request body
schema:
type: object
properties:
new_version:
type: string
description: The new version for the room.
example: {"new_version": "2"}
required: [new_version]
responses:
200:
description: The room was successfully upgraded.
examples:
application/json: {
"replacement_room": "!newroom:example.org"
}
schema:
type: object
properties:
replacement_room:
type: string
description: The ID of the new room.
required: [replacement_room]
400:
description: |-
The request was invalid. One way this can happen is if the room version
requested is not supported by the homeserver.
examples:
application/json: {
"errcode": "M_UNSUPPORTED_ROOM_VERSION",
"error": "This server does not support that room version"
}
schema:
"$ref": "definitions/errors/error.yaml"
403:
description: |-
The user is not permitted to upgrade the room.
examples:
application/json: {
"errcode": "M_FORBIDDEN",
"error": "You cannot upgrade this room"
}
schema:
"$ref": "definitions/errors/error.yaml"
tags:
- Room ugprades

@ -5,6 +5,10 @@
"content": {
"creator": "@example:example.org",
"room_version": "1",
"m.federate": true
"m.federate": true,
"predecessor": {
"event_id": "$something:example.org",
"room_id": "!oldroom:example.org"
}
}
}

@ -0,0 +1,9 @@
{
"$ref": "core/state_event.json",
"type": "m.room.tombstone",
"state_key": "",
"content": {
"body": "This room has been replaced",
"replacement_room": "!newroom:example.org"
}
}

@ -14,6 +14,18 @@ properties:
room_version:
description: The version of the room. Defaults to ``"1"`` if the key does not exist.
type: string
predecessor:
description: A reference to the room this room replaces, if the previous room was upgraded.
type: object
title: Previous Room
properties:
room_id:
type: string
description: The ID of the old room.
event_id:
type: string
description: The event ID of the last known event in the old room.
required: [room_id, event_id]
required:
- creator
type: object

@ -0,0 +1,27 @@
---
allOf:
- $ref: core-event-schema/state_event.yaml
description: 'A state event signifying that a room has been upgraded to a different room version, and that clients should go there.'
properties:
content:
properties:
body:
type: string
description: A server-defined message.
replacement_room:
type: string
description: The new room the client should be visiting.
required:
- replacement_room
- body
type: object
state_key:
description: A zero-length string.
pattern: '^$'
type: string
type:
enum:
- m.room.tombstone
type: string
title: Indication that the room has been upgraded.
type: object

@ -48,7 +48,7 @@ When this is called, the server:
"state_key": "",
"room_id": "!QtykxKocfsgujksjgd:matrix.org",
"content": {
"version": "2",
"room_version": "2",
"predecessor": {
"room_id": "!cURbaf:matrix.org",
"event_id": "$1235135aksjgdkg:matrix.org"

@ -0,0 +1,76 @@
.. 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.
Room Upgrades
=============
.. _module:room-upgrades:
From time to time, a room may need to be upgraded to a different room version for a
variety for reasons. This module defines a way for rooms to upgrade to a different
room version when needed.
Events
------
{{m_room_tombstone_event}}
Client behaviour
----------------
Clients which understand ``m.room.tombstone`` events MUST:
* Hide the old room from the user's list of rooms. Permalinks, backlinks, etc should
still be accessible to this room, however.
* At the very bottom of the old room's timeline/message view, display a message which
indicates the room has been upgraded with a permalink to the new room. When the user
accesses the permalink, they are to be joined to the new room.
* Note that if the homeserver doesn't support the room version that the user may
receive an error upon trying to join.
* If the replacement room has a tombstone event, the client may automatically follow
the chain until it finds a room which does not have a tombstone in it.
* Optionally, the client may wish to improve the presentation of unread messages when
the user is in both the old and new rooms. For example, if the user was not active
during the upgrade and had unread messages in the old room, the new room may have an
indicator which shows the sum of unread notifications between the rooms.
Clients which understand ``m.room.tombstone`` events must also understand the ``predecessor``
field on ``m.room.create`` events such that:
* At the top of the scrollback/message view for the new room a message is displayed
indicating that the room is a continuation of a previous room, with a permalink to
the old room.
* Optionally supporting search and other functions of the room to span across the old
and new rooms.
{{room_upgrades_cs_http_api}}
Server behaviour
----------------
When the client requests to upgrade a known room to a known version, the server:
1. Checks that the user has permission to send ``m.room.tombstone`` events in the room.
2. Creates a replacement room with a ``m.room.create`` event containing a ``predecessor``
field and the applicable ``room_version``.
3. Replicates the power levels, privacy, topic, and other transferable state events to
the new room. This generally excludes membership events.
4. Moves any local aliases to the new room.
5. Sends a ``m.room.tombstone`` event to the old room to indicate that it is not intended
to be used any further.
6. If possible, the power levels in the old room should also be modified to prevent sending
of events and inviting new users. For example, setting ``events_default`` and ``invite``
to the greater of ``50`` and ``users_default + 1``.

@ -70,6 +70,7 @@ groups: # reusable blobs of files when prefixed with 'group:'
- modules/openid.rst
- modules/server_acls.rst
- modules/mentions.rst
- modules/room_upgrades.rst
title_styles: ["=", "-", "~", "+", "^", "`", "@", ":"]

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