86 lines
3.1 KiB
TypeScript
86 lines
3.1 KiB
TypeScript
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import { Behavior } from "../Behavior";
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const ownMembership$ = (
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multiSfu: boolean,
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preferStickyEvents: boolean,
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): {
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connected: Behavior<boolean>;
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transport: Behavior<LivekitTransport | null>;
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} => {
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/**
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* Lists the transports used by ourselves, plus all other MatrixRTC session
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* members. For completeness this also lists the preferred transport and
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* whether we are in multi-SFU mode or sticky events mode (because
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* advertisedTransport$ wants to read them at the same time, and bundling data
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* together when it might change together is what you have to do in RxJS to
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* avoid reading inconsistent state or observing too many changes.)
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*/
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// TODO-MULTI-SFU find a better name for this. With the addition of sticky events it's no longer just about transports.
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// DISCUSS move to MatrixLivekitMerger
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const transport$: Behavior<{
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local: Async<LivekitTransport>;
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preferred: Async<LivekitTransport>;
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multiSfu: boolean;
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preferStickyEvents: boolean;
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} | null> = this.scope.behavior(
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this.joined$.pipe(
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switchMap((joined) =>
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joined
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? combineLatest(
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[
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this.preferredTransport$,
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this.memberships$,
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multiSfu.value$,
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preferStickyEvents.value$,
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],
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(preferred, memberships, preferMultiSfu, preferStickyEvents) => {
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// Multi-SFU must be implicitly enabled when using sticky events
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const multiSfu = preferStickyEvents || preferMultiSfu;
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const oldestMembership =
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this.matrixRTCSession.getOldestMembership();
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const remote = memberships.flatMap((m) => {
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if (m.userId === this.userId && m.deviceId === this.deviceId)
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return [];
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const t = m.getTransport(oldestMembership ?? m);
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return t && isLivekitTransport(t)
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? [{ membership: m, transport: t }]
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: [];
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});
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let local = preferred;
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if (!multiSfu) {
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const oldest = this.matrixRTCSession.getOldestMembership();
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if (oldest !== undefined) {
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const selection = oldest.getTransport(oldest);
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// TODO selection can be null if no transport is configured should we report an error?
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if (selection && isLivekitTransport(selection))
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local = ready(selection);
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}
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}
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if (local.state === "error") {
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this._configError$.next(
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local.value instanceof ElementCallError
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? local.value
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: new UnknownCallError(local.value),
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);
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}
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return {
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local,
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remote,
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preferred,
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multiSfu,
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preferStickyEvents,
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};
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},
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)
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: of(null),
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),
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),
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);
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return { connected: true, transport$ };
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};
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