wakelock.ts

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`36d64b37` 2026-03-15 Pavel Safronov	1	export const createWakeLockManager = () => {
`f495a654` 2026-03-16 Pavel Safronov	2	type WakeLockSentinelLike = {
	3	release: () => Promise<void>;
	4	addEventListener: (type: 'release', listener: () => void) => void;
	5	};
	6
	7	let wakeLockSentinel: WakeLockSentinelLike \| null = null;
`36d64b37` 2026-03-15 Pavel Safronov	8	const hasWakeLockSupport = typeof navigator !== 'undefined' && 'wakeLock' in navigator;
`f495a654` 2026-03-16 Pavel Safronov	9	let wakeLockRequested = false;
	10
	11	const getWakeLockApi = () => (navigator as Navigator & {
	12	wakeLock?: { request: (type: 'screen') => Promise<WakeLockSentinelLike> }
	13	}).wakeLock;
	14
	15	const releaseWakeLock = async () => {
	16	if (!wakeLockSentinel) return;
	17
	18	try {
	19	await wakeLockSentinel.release();
	20	} catch (err) {
	21	console.debug('Wake lock release failed', err);
	22	} finally {
	23	wakeLockSentinel = null;
	24	}
	25	};
`36d64b37` 2026-03-15 Pavel Safronov	26
	27	const requestWakeLock = async () => {
	28	if (!hasWakeLockSupport) return;
`f495a654` 2026-03-16 Pavel Safronov	29	if (!wakeLockRequested) return;
`36d64b37` 2026-03-15 Pavel Safronov	30	if (document.visibilityState !== 'visible') return;
	31	if (wakeLockSentinel) return;
	32
	33	try {
`f495a654` 2026-03-16 Pavel Safronov	34	const nextSentinel = await getWakeLockApi()?.request('screen');
	35	if (!nextSentinel) return;
	36
	37	if (!wakeLockRequested \|\| document.visibilityState !== 'visible') {
	38	await nextSentinel.release();
	39	return;
	40	}
	41
	42	wakeLockSentinel = nextSentinel;
`36d64b37` 2026-03-15 Pavel Safronov	43	wakeLockSentinel.addEventListener('release', () => {
	44	wakeLockSentinel = null;
`f495a654` 2026-03-16 Pavel Safronov	45	if (wakeLockRequested && document.visibilityState === 'visible') {
`36d64b37` 2026-03-15 Pavel Safronov	46	void requestWakeLock();
	47	}
	48	});
	49	} catch (err) {
	50	console.debug('Wake lock request failed', err);
	51	}
	52	};
	53
`f495a654` 2026-03-16 Pavel Safronov	54	const setWakeLockEnabled = async (enabled: boolean) => {
	55	wakeLockRequested = enabled;
	56	if (!enabled) {
	57	await releaseWakeLock();
	58	return;
	59	}
	60
	61	await requestWakeLock();
	62	};
	63
	64	return {
	65	requestWakeLock,
	66	setWakeLockEnabled,
	67	hasWakeLockSupport: () => hasWakeLockSupport,
	68	isWakeLockEnabled: () => wakeLockRequested
	69	};
`36d64b37` 2026-03-15 Pavel Safronov	70	};