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matrix-spec/data/api/client-server/relations.yaml

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# Copyright 2022,2024 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.
openapi: 3.1.0
info:
title: Matrix Client-Server Relations API
version: 1.0.0
paths:
"/rooms/{roomId}/relations/{eventId}":
get:
summary: Get the child events for a given parent event.
description: |-
Retrieve all of the child events for a given parent event.
Note that when paginating the `from` token should be "after" the `to` token in
terms of topological ordering, because it is only possible to paginate "backwards"
through events, starting at `from`.
For example, passing a `from` token from page 2 of the results, and a `to` token
from page 1, would return the empty set. The caller can use a `from` token from
page 1 and a `to` token from page 2 to paginate over the same range, however.
operationId: getRelatingEvents
security:
- accessTokenQuery: []
- accessTokenBearer: []
parameters:
- $ref: '#/components/parameters/roomId'
- $ref: '#/components/parameters/eventId'
- $ref: '#/components/parameters/from'
- $ref: '#/components/parameters/to'
- $ref: '#/components/parameters/limit'
- $ref: '#/components/parameters/dir'
- $ref: '#/components/parameters/recurse'
responses:
# note: this endpoint deliberately does not support rate limiting, therefore a
# 429 error response is not included.
"200":
description: |-
The paginated child events which point to the parent. If no events are
pointing to the parent or the pagination yields no results, an empty `chunk`
is returned.
content:
application/json:
schema:
allOf:
- $ref: '#/components/schemas/response'
- type: object
properties:
chunk:
title: ChildEventsChunk
type: array
description: The child events of the requested event, ordered topologically
most-recent first.
items:
$ref: definitions/client_event.yaml
required:
- chunk
examples:
response:
$ref: '#/components/examples/response'
"404":
$ref: '#/components/responses/404'
tags:
- Event relationships
# The same as above, with added `/{relType}`
"/rooms/{roomId}/relations/{eventId}/{relType}":
get:
summary: Get the child events for a given parent event, with a given `relType`.
description: |-
Retrieve all of the child events for a given parent event which relate to the parent
using the given `relType`.
Note that when paginating the `from` token should be "after" the `to` token in
terms of topological ordering, because it is only possible to paginate "backwards"
through events, starting at `from`.
For example, passing a `from` token from page 2 of the results, and a `to` token
from page 1, would return the empty set. The caller can use a `from` token from
page 1 and a `to` token from page 2 to paginate over the same range, however.
operationId: getRelatingEventsWithRelType
security:
- accessTokenQuery: []
- accessTokenBearer: []
parameters:
- $ref: '#/components/parameters/roomId'
- $ref: '#/components/parameters/eventId'
- $ref: '#/components/parameters/relType'
- $ref: '#/components/parameters/from'
- $ref: '#/components/parameters/to'
- $ref: '#/components/parameters/limit'
- $ref: '#/components/parameters/dir'
- $ref: '#/components/parameters/recurse'
responses:
# note: this endpoint deliberately does not support rate limiting, therefore a
# 429 error response is not included.
"200":
description: |-
The paginated child events which point to the parent. If no events are
pointing to the parent or the pagination yields no results, an empty `chunk`
is returned.
content:
application/json:
schema:
allOf:
- $ref: '#/components/schemas/response'
- type: object
properties:
chunk:
title: ChildEventsChunk
type: array
description: |-
The child events of the requested event, ordered topologically
most-recent first. The events returned will match the `relType`
supplied in the URL.
items:
$ref: definitions/client_event.yaml
required:
- chunk
examples:
response:
$ref: '#/components/examples/response'
"404":
$ref: '#/components/responses/404'
tags:
- Event relationships
# The same as above, with added `/{eventType}`
"/rooms/{roomId}/relations/{eventId}/{relType}/{eventType}":
get:
summary: Get the child events for a given parent event, with a given `relType`
and `eventType`.
description: |-
Retrieve all of the child events for a given parent event which relate to the parent
using the given `relType` and have the given `eventType`.
Note that when paginating the `from` token should be "after" the `to` token in
terms of topological ordering, because it is only possible to paginate "backwards"
through events, starting at `from`.
For example, passing a `from` token from page 2 of the results, and a `to` token
from page 1, would return the empty set. The caller can use a `from` token from
page 1 and a `to` token from page 2 to paginate over the same range, however.
operationId: getRelatingEventsWithRelTypeAndEventType
security:
- accessTokenQuery: []
- accessTokenBearer: []
parameters:
- $ref: '#/components/parameters/roomId'
- $ref: '#/components/parameters/eventId'
- $ref: '#/components/parameters/relType'
- in: path
name: eventType
description: |-
The event type of child events to search for.
Note that in encrypted rooms this will typically always be `m.room.encrypted`
regardless of the event type contained within the encrypted payload.
required: true
example: m.room.message
schema:
type: string
- $ref: '#/components/parameters/from'
- $ref: '#/components/parameters/to'
- $ref: '#/components/parameters/limit'
- $ref: '#/components/parameters/dir'
- $ref: '#/components/parameters/recurse'
responses:
# note: this endpoint deliberately does not support rate limiting, therefore a
# 429 error response is not included.
"200":
description: |-
The paginated child events which point to the parent. If no events are
pointing to the parent or the pagination yields no results, an empty `chunk`
is returned.
content:
application/json:
schema:
allOf:
- $ref: '#/components/schemas/response'
- type: object
properties:
chunk:
title: ChildEventsChunk
type: array
description: |-
The child events of the requested event, ordered topologically most-recent
first. The events returned will match the `relType` and `eventType` supplied
in the URL.
items:
$ref: definitions/client_event.yaml
required:
- chunk
examples:
response:
$ref: '#/components/examples/response'
"404":
$ref: '#/components/responses/404'
tags:
- Event relationships
servers:
- url: "{protocol}://{hostname}{basePath}"
variables:
protocol:
enum:
- http
- https
default: https
hostname:
default: localhost:8008
basePath:
default: /_matrix/client/v1
components:
securitySchemes:
accessTokenQuery:
$ref: definitions/security.yaml#/accessTokenQuery
accessTokenBearer:
$ref: definitions/security.yaml#/accessTokenBearer
parameters:
roomId:
in: path
name: roomId
description: The ID of the room containing the parent event.
required: true
example: "!636q39766251:matrix.org"
schema:
type: string
eventId:
in: path
name: eventId
description: The ID of the parent event whose child events are to be returned.
required: true
example: $asfDuShaf7Gafaw
schema:
type: string
from:
in: query
name: from
description: |-
The pagination token to start returning results from. If not supplied, results
start at the most recent topological event known to the server.
Can be a `next_batch` or `prev_batch` token from a previous call, or a returned
`start` token from [`/messages`](/client-server-api/#get_matrixclientv3roomsroomidmessages),
or a `next_batch` token from [`/sync`](/client-server-api/#get_matrixclientv3sync).
required: false
example: page2_token
schema:
type: string
to:
in: query
name: to
description: |-
The pagination token to stop returning results at. If not supplied, results
continue up to `limit` or until there are no more events.
Like `from`, this can be a previous token from a prior call to this endpoint
or from `/messages` or `/sync`.
required: false
example: page3_token
schema:
type: string
limit:
in: query
name: limit
description: |-
The maximum number of results to return in a single `chunk`. The server can
and should apply a maximum value to this parameter to avoid large responses.
Similarly, the server should apply a default value when not supplied.
required: false
example: 20
schema:
type: integer
dir:
in: query
name: dir
x-addedInMatrixVersion: "1.4"
description: |-
Optional (default `b`) direction to return events from. If this is set to `f`, events
will be returned in chronological order starting at `from`. If it
is set to `b`, events will be returned in *reverse* chronological
order, again starting at `from`.
schema:
type: string
enum:
- b
- f
relType:
in: path
name: relType
description: The [relationship type](/client-server-api/#relationship-types) to
search for.
required: true
example: org.example.my_relation
schema:
type: string
recurse:
in: query
name: recurse
x-addedInMatrixVersion: "1.10"
required: false
description: |-
Whether to additionally include events which only relate indirectly to the
given event, i.e. events related to the given event via two or more direct relationships.
If set to `false`, only events which have a direct relation with the given
event will be included.
If set to `true`, events which have an indirect relation with the given event
will be included additionally up to a certain depth level. Homeservers SHOULD traverse
at least 3 levels of relationships. Implementations MAY perform more but MUST be careful
to not infinitely recurse.
The default value is `false`.
schema:
type: boolean
schemas:
response:
type: object
properties:
next_batch:
type: string
description: |-
An opaque string representing a pagination token. The absence of this token
means there are no more results to fetch and the client should stop paginating.
prev_batch:
type: string
description: |-
An opaque string representing a pagination token. The absence of this token
means this is the start of the result set, i.e. this is the first batch/page.
recursion_depth:
type: integer
description: |-
If the `recurse` parameter was supplied by the client, this response field is
mandatory and gives the actual depth to which the server recursed. If the client
did not specify the `recurse` parameter, this field must be absent.
responses:
"404":
description: |-
The parent event was not found or the user does not have permission to read
this event (it might be contained in history that is not accessible to the user).
content:
application/json:
schema:
$ref: definitions/errors/error.yaml
examples:
response:
value: {
"errcode": "M_NOT_FOUND",
"error": "Event not found."
}
examples:
response:
value: {
"chunk": [
{
"room_id": "!636q39766251:matrix.org",
"$ref": "../../event-schemas/examples/m.room.message$m.text.yaml",
"content": {
"m.relates_to": {
"rel_type": "org.example.my_relation",
"event_id": "$asfDuShaf7Gafaw"
}
}
}
],
"next_batch": "page2_token",
"prev_batch": "page1_token"
}