41 lines
1.0 KiB
TypeScript
41 lines
1.0 KiB
TypeScript
 
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/**
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* [Gitea #136] Elbow-on-the-keyboard guard for push-to-talk: a hold longer
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* than `maxMs` is released as if the key came up. `arm()` on press, `disarm()`
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* on release (a genuine release + re-press restarts the clock). Timers are
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* injectable for tests.
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*/
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export const PTT_MAX_HOLD_MS = 5 * 60 * 1000;
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type Timers = {
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setTimeout: (fn: () => void, ms: number) => unknown;
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clearTimeout: (handle: unknown) => void;
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};
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const realTimers: Timers = {
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setTimeout: (fn, ms) => setTimeout(fn, ms),
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clearTimeout: (h) => clearTimeout(h as ReturnType<typeof setTimeout>),
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};
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export const createPttHoldWatchdog = (
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onExpire: () => void,
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maxMs = PTT_MAX_HOLD_MS,
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timers: Timers = realTimers,
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) => {
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let handle: unknown;
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const disarm = () => {
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if (handle !== undefined) timers.clearTimeout(handle);
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handle = undefined;
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};
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return {
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arm: () => {
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disarm();
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handle = timers.setTimeout(() => {
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handle = undefined;
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onExpire();
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}, maxMs);
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},
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disarm,
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armed: () => handle !== undefined,
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};
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};
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