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//! Types for MatrixRTC `m.call.member` state event content data ([MSC3401])
//!
//! [MSC3401]: https://github.com/matrix-org/matrix-spec-proposals/pull/3401
use std::time::Duration;
use as_variant::as_variant;
use ruma_common::{DeviceId, MilliSecondsSinceUnixEpoch, OwnedDeviceId};
use ruma_macros::StringEnum;
use serde::{Deserialize, Serialize};
use tracing::warn;
use super::focus::{ActiveFocus, ActiveLivekitFocus, Focus};
use crate::PrivOwnedStr;
/// The data object that contains the information for one membership.
///
/// It can be a legacy or a normal MatrixRTC Session membership.
///
/// The legacy format contains time information to compute if it is expired or not.
/// SessionMembershipData does not have the concept of timestamp based expiration anymore.
/// The state event will reliably be set to empty when the user disconnects.
#[derive(Clone, Debug)]
#[cfg_attr(test, derive(PartialEq))]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub enum MembershipData<'a> {
/// The legacy format (using an array of memberships for each device -> one event per user)
Legacy(&'a LegacyMembershipData),
/// One event per device. `SessionMembershipData` contains all the information required to
/// represent the current membership state of one device.
Session(&'a SessionMembershipData),
}
impl<'a> MembershipData<'a> {
/// The application this RTC membership participates in (the session type, can be `m.call`...)
pub fn application(&self) -> &Application {
match self {
MembershipData::Legacy(data) => &data.application,
MembershipData::Session(data) => &data.application,
}
}
/// The device id of this membership.
pub fn device_id(&self) -> &DeviceId {
match self {
MembershipData::Legacy(data) => &data.device_id,
MembershipData::Session(data) => &data.device_id,
}
}
/// The active focus is a FocusType specific object that describes how this user
/// is currently connected.
///
/// It can use the foci_preferred list to choose one of the available (preferred)
/// foci or specific information on how to connect to this user.
///
/// Every user needs to converge to use the same focus_active type.
pub fn focus_active(&self) -> &ActiveFocus {
match self {
MembershipData::Legacy(_) => &ActiveFocus::Livekit(ActiveLivekitFocus {
focus_selection: super::focus::FocusSelection::OldestMembership,
}),
MembershipData::Session(data) => &data.focus_active,
}
}
/// The list of available/preferred options this user provides to connect to the call.
pub fn foci_preferred(&self) -> &Vec<Focus> {
match self {
MembershipData::Legacy(data) => &data.foci_active,
MembershipData::Session(data) => &data.foci_preferred,
}
}
/// The application of the membership is "m.call" and the scope is "m.room".
pub fn is_room_call(&self) -> bool {
as_variant!(self.application(), Application::Call)
.is_some_and(|call| call.scope == CallScope::Room)
}
/// The application of the membership is "m.call".
pub fn is_call(&self) -> bool {
as_variant!(self.application(), Application::Call).is_some()
}
/// Checks if the event is expired. This is only relevant for LegacyMembershipData
/// returns `false` if its SessionMembershipData
pub fn is_expired(&self, origin_server_ts: Option<MilliSecondsSinceUnixEpoch>) -> bool {
match self {
MembershipData::Legacy(data) => data.is_expired(origin_server_ts),
MembershipData::Session(_) => false,
}
}
/// Gets the created_ts of the event.
///
/// This is the `origin_server_ts` for session data.
/// For legacy events this can either be the origin server ts or a copy from the
/// `origin_server_ts` since we expect legacy events to get updated (when a new device
/// joins/leaves).
pub fn created_ts(&self) -> Option<MilliSecondsSinceUnixEpoch> {
match self {
MembershipData::Legacy(data) => data.created_ts,
MembershipData::Session(data) => data.created_ts,
}
}
}
/// A membership describes one of the sessions this user currently partakes.
///
/// The application defines the type of the session.
#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub struct LegacyMembershipData {
/// The type of the MatrixRTC session the membership belongs to.
///
/// e.g. call, spacial, document...
#[serde(flatten)]
pub application: Application,
/// The device id of this membership.
///
/// The same user can join with their phone/computer.
pub device_id: OwnedDeviceId,
/// The duration in milliseconds relative to the time this membership joined
/// during which the membership is valid.
///
/// The time a member has joined is defined as:
/// `MIN(content.created_ts, event.origin_server_ts)`
#[serde(with = "ruma_common::serde::duration::ms")]
pub expires: Duration,
/// Stores a copy of the `origin_server_ts` of the initial session event.
///
/// If the membership is updated this field will be used to track to
/// original `origin_server_ts`.
#[serde(skip_serializing_if = "Option::is_none")]
pub created_ts: Option<MilliSecondsSinceUnixEpoch>,
/// A list of the foci in use for this membership.
pub foci_active: Vec<Focus>,
/// The id of the membership.
///
/// This is required to guarantee uniqueness of the event.
/// Sending the same state event twice to synapse makes the HS drop the second one and return
/// 200.
#[serde(rename = "membershipID")]
pub membership_id: String,
}
impl LegacyMembershipData {
/// Checks if the event is expired.
///
/// Defaults to using `created_ts` of the [`LegacyMembershipData`].
/// If no `origin_server_ts` is provided and the event does not contain `created_ts`
/// the event will be considered as not expired.
/// In this case, a warning will be logged.
///
/// # Arguments
///
/// * `origin_server_ts` - a fallback if [`LegacyMembershipData::created_ts`] is not present
pub fn is_expired(&self, origin_server_ts: Option<MilliSecondsSinceUnixEpoch>) -> bool {
let ev_created_ts = self.created_ts.or(origin_server_ts);
if let Some(ev_created_ts) = ev_created_ts {
let now = MilliSecondsSinceUnixEpoch::now().to_system_time();
let expire_ts = ev_created_ts.to_system_time().map(|t| t + self.expires);
now > expire_ts
} else {
// This should not be reached since we only allow events that have copied over
// the origin server ts. `set_created_ts_if_none`
warn!("Encountered a Call Member state event where the origin_ts (or origin_server_ts) could not be found.\
It is treated as a non expired event but this might be wrong.");
false
}
}
}
/// Initial set of fields of [`LegacyMembershipData`].
#[derive(Debug)]
#[allow(clippy::exhaustive_structs)]
pub struct LegacyMembershipDataInit {
/// The type of the MatrixRTC session the membership belongs to.
///
/// e.g. call, spacial, document...
pub application: Application,
/// The device id of this membership.
///
/// The same user can join with their phone/computer.
pub device_id: OwnedDeviceId,
/// The duration in milliseconds relative to the time this membership joined
/// during which the membership is valid.
///
/// The time a member has joined is defined as:
/// `MIN(content.created_ts, event.origin_server_ts)`
pub expires: Duration,
/// A list of the focuses (foci) in use for this membership.
pub foci_active: Vec<Focus>,
/// The id of the membership.
///
/// This is required to guarantee uniqueness of the event.
/// Sending the same state event twice to synapse makes the HS drop the second one and return
/// 200.
pub membership_id: String,
}
impl From<LegacyMembershipDataInit> for LegacyMembershipData {
fn from(init: LegacyMembershipDataInit) -> Self {
let LegacyMembershipDataInit {
application,
device_id,
expires,
foci_active,
membership_id,
} = init;
Self { application, device_id, expires, created_ts: None, foci_active, membership_id }
}
}
/// Stores all the information for a MatrixRTC membership. (one for each device)
#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub struct SessionMembershipData {
/// The type of the MatrixRTC session the membership belongs to.
///
/// e.g. call, spacial, document...
#[serde(flatten)]
pub application: Application,
/// The device id of this membership.
///
/// The same user can join with their phone/computer.
pub device_id: OwnedDeviceId,
/// A list of the foci that this membership proposes to use.
pub foci_preferred: Vec<Focus>,
/// Data required to determine the currently used focus by this member.
pub focus_active: ActiveFocus,
/// Stores a copy of the `origin_server_ts` of the initial session event.
///
/// This is not part of the serialized event and computed after serialization.
#[serde(skip)]
pub created_ts: Option<MilliSecondsSinceUnixEpoch>,
}
/// The type of the MatrixRTC session.
///
/// This is not the application/client used by the user but the
/// type of MatrixRTC session e.g. calling (`m.call`), third-room, whiteboard could be
/// possible applications.
#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
#[serde(tag = "application")]
pub enum Application {
/// The rtc application (session type) for VoIP call.
#[serde(rename = "m.call")]
Call(CallApplicationContent),
}
/// Call specific parameters of a `m.call.member` event.
#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
pub struct CallApplicationContent {
/// An identifier for calls.
///
/// All members using the same `call_id` will end up in the same call.
///
/// Does not need to be a uuid.
///
/// `""` is used for room scoped calls.
pub call_id: String,
/// Who owns/joins/controls (can modify) the call.
pub scope: CallScope,
}
impl CallApplicationContent {
/// Initialize a [`CallApplicationContent`].
///
/// # Arguments
///
/// * `call_id` - An identifier for calls. All members using the same `call_id` will end up in
/// the same call. Does not need to be a uuid. `""` is used for room scoped calls.
/// * `scope` - Who owns/joins/controls (can modify) the call.
pub fn new(call_id: String, scope: CallScope) -> Self {
Self { call_id, scope }
}
}
/// The call scope defines different call ownership models.
#[doc = include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/src/doc/string_enum.md"))]
#[derive(Clone, PartialEq, StringEnum)]
#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
#[ruma_enum(rename_all = "m.snake_case")]
pub enum CallScope {
/// A call which every user of a room can join and create.
///
/// There is no particular name associated with it.
///
/// There can only be one per room.
Room,
/// A user call is owned by a user.
///
/// Each user can create one there can be multiple per room. They are started and ended by the
/// owning user.
User,
#[doc(hidden)]
_Custom(PrivOwnedStr),
}