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//! `GET /_matrix/client/*/rooms/{roomId}/relations/{eventId}`
//!
//! Get the child events for a given parent event.
pub mod v1 {
//! `/v1/` ([spec])
//!
//! [spec]: https://spec.matrix.org/latest/client-server-api/#get_matrixclientv1roomsroomidrelationseventid
use js_int::UInt;
use ruma_common::{
OwnedEventId, OwnedRoomId,
api::{Direction, auth_scheme::AccessToken, request, response},
metadata,
serde::Raw,
};
use ruma_events::AnyMessageLikeEvent;
metadata! {
method: GET,
rate_limited: false,
authentication: AccessToken,
history: {
unstable => "/_matrix/client/unstable/rooms/{room_id}/relations/{event_id}",
1.3 => "/_matrix/client/v1/rooms/{room_id}/relations/{event_id}",
}
}
/// Request type for the `get_relating_events` endpoint.
#[request(error = crate::Error)]
pub struct Request {
/// The ID of the room containing the parent event.
#[ruma_api(path)]
pub room_id: OwnedRoomId,
/// The ID of the parent event whose child events are to be returned.
#[ruma_api(path)]
pub event_id: OwnedEventId,
/// The pagination token to start returning results from.
///
/// If `None`, 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` or a `next_batch` token from `/sync`.
///
/// 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`.
#[serde(skip_serializing_if = "Option::is_none")]
#[ruma_api(query)]
pub from: Option<String>,
/// The direction to return events from.
///
/// Defaults to [`Direction::Backward`].
#[serde(default, skip_serializing_if = "ruma_common::serde::is_default")]
#[ruma_api(query)]
pub dir: Direction,
/// The pagination token to stop returning results at.
///
/// If `None`, 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`.
#[serde(skip_serializing_if = "Option::is_none")]
#[ruma_api(query)]
pub to: Option<String>,
/// 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.
#[serde(skip_serializing_if = "Option::is_none")]
#[ruma_api(query)]
pub limit: Option<UInt>,
/// Whether to include events which relate indirectly to the given event.
///
/// These are events related to the given event via two or more direct relationships.
///
/// It is recommended that homeservers traverse at least 3 levels of relationships.
/// Implementations may perform more but should be careful to not infinitely recurse.
///
/// Default to `false`.
#[serde(default, skip_serializing_if = "ruma_common::serde::is_default")]
#[ruma_api(query)]
pub recurse: bool,
}
/// Response type for the `get_relating_events` endpoint.
#[response(error = crate::Error)]
pub struct Response {
/// The paginated child events which point to the parent.
///
/// The events returned are ordered topologically, most-recent first.
///
/// If no events are related to the parent or the pagination yields no results, an
/// empty `chunk` is returned.
pub chunk: Vec<Raw<AnyMessageLikeEvent>>,
/// An opaque string representing a pagination token.
///
/// If this is `None`, there are no more results to fetch and the client should stop
/// paginating.
#[serde(skip_serializing_if = "Option::is_none")]
pub next_batch: Option<String>,
/// An opaque string representing a pagination token.
///
/// If this is `None`, this is the start of the result set, i.e. this is the first
/// batch/page.
#[serde(skip_serializing_if = "Option::is_none")]
pub prev_batch: Option<String>,
/// If `recurse` was set on the request, the depth to which the server recursed.
///
/// If `recurse` was not set, this field must be absent.
#[serde(skip_serializing_if = "Option::is_none")]
pub recursion_depth: Option<UInt>,
}
impl Request {
/// Creates a new `Request` with the given room ID and parent event ID.
pub fn new(room_id: OwnedRoomId, event_id: OwnedEventId) -> Self {
Self {
room_id,
event_id,
dir: Direction::default(),
from: None,
to: None,
limit: None,
recurse: false,
}
}
}
impl Response {
/// Creates a new `Response` with the given chunk.
pub fn new(chunk: Vec<Raw<AnyMessageLikeEvent>>) -> Self {
Self { chunk, next_batch: None, prev_batch: None, recursion_depth: None }
}
}
}