jaredandClaude Opus 5
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Every io.lotus.call_state push allocated a new Set, re-rendering the app-wide call bar for the whole call. nextSpeakerSet() returns the previous reference when membership is unchanged (pure helpers in utils/speakerSet.ts, unit-tested), and the DOM MutationObserver fallback in useCallSpeakers/useRemoteAllMuted is attached only while the fork's participant list is unavailable. Fixes #32 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
32 lines
1.0 KiB
TypeScript
32 lines
1.0 KiB
TypeScript
import { isUserId } from './matrix';
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/** Minimal shape of a `io.lotus.call_state` participant entry we need here. */
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export type SpeakingParticipant = { userId: string; speaking: boolean };
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/** True when both sets contain exactly the same members. */
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export const sameSet = <T>(a: Set<T>, b: Set<T>): boolean => {
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if (a === b) return true;
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if (a.size !== b.size) return false;
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for (const v of a) {
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if (!b.has(v)) return false;
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}
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return true;
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};
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/**
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* Derives the speaking-users set from a `io.lotus.call_state` participant
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* list. Returns `prev` unchanged (same reference) when the derived set is
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* equal to it, so callers using the functional `setState` form can bail out
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* of a re-render (#32 — the fork pushes this multiple times per second).
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*/
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export const nextSpeakerSet = (
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prev: Set<string>,
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participants: readonly SpeakingParticipant[],
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): Set<string> => {
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const next = new Set<string>();
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participants.forEach((p) => {
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if (p.speaking && isUserId(p.userId)) next.add(p.userId);
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});
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return sameSet(prev, next) ? prev : next;
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};
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