byGalax
38 lines
1.2 KiB
TypeScript
38 lines
1.2 KiB
TypeScript
import { rtc } from '@chat-app/shared';
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import type { CallSignal } from '@chat-app/shared/rtc';
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import type { AppSupabaseClient } from '@chat-app/shared/supabase';
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// Thin wrapper around Supabase realtime broadcast for call signaling.
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// One channel per peer userId. Subscriptions live for the lifetime of
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// the AuthProvider's session; teardown returns a no-arg unsubscribe.
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export type SignalListener = (signal: CallSignal) => void;
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export function subscribeCallSignals(
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client: AppSupabaseClient,
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myUserId: string,
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onSignal: SignalListener,
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): () => void {
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const ch = client.channel(rtc.signalTopic(myUserId));
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ch.on('broadcast', { event: 'signal' }, (msg) => {
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if (msg.payload && typeof msg.payload === 'object') {
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onSignal(msg.payload as CallSignal);
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}
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});
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void ch.subscribe();
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return () => {
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void client.removeChannel(ch);
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};
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}
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export async function sendCallSignal(
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client: AppSupabaseClient,
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toUserId: string,
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payload: CallSignal,
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): Promise<void> {
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const ch = client.channel(rtc.signalTopic(toUserId));
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await ch.subscribe();
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await ch.send({ type: 'broadcast', event: 'signal', payload });
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await client.removeChannel(ch);
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}
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