50 lines
1.7 KiB
TypeScript
50 lines
1.7 KiB
TypeScript
// icecast's events. The tool runtime imports this once the broker is bound. It watches the streaming
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// server and announces when a mountpoint goes live or drops.
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//
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// Emits (novox/hq ADR 0041/0042):
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// module.icecast.stream.started / .stopped — a mountpoint appeared or disappeared
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//
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// A mountpoint exists only while a source is connected, so the set of mounts diffed over time is
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// exactly the set of live streams. Primed silently on the first look, so streams already running when
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// this starts are not announced as freshly begun. Polling is unhurried — a stream a few seconds late
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// is still the event, and hammering the status endpoint buys immediacy nobody asked for.
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import { emit } from "@novox/mesh-sdk/events";
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import { IcecastClient, type IcecastMount } from "./client.js";
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const icecast = IcecastClient.fromEnv();
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const live = new Map<string, IcecastMount>();
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let primed = false;
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async function pollMounts(): Promise<void> {
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const { mounts } = await icecast.getStatus();
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const now = new Map(mounts.map((m) => [m.mount, m]));
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if (primed) {
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for (const [mount, m] of now) {
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if (!live.has(mount)) {
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await emit("module.icecast.stream.started", {
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mount,
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name: m.name,
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description: m.description,
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bitrate: m.bitrate,
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});
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}
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}
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for (const [mount, m] of live) {
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if (!now.has(mount)) {
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await emit("module.icecast.stream.stopped", { mount, name: m.name });
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}
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}
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}
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live.clear();
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for (const [mount, m] of now) live.set(mount, m);
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primed = true;
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}
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const run = (): void => void pollMounts().catch((err) => console.error(`[icecast] ${err}`));
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setInterval(run, 15_000);
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run();
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console.log("[icecast] watching mountpoints for streams starting and stopping");
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