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import { Subscription, UnavailabilityError } from 'expo-modules-core';
import { useEffect, useId } from 'react';
import ExpoKeepAwake from './ExpoKeepAwake';
import { KeepAwakeListener, KeepAwakeOptions } from './KeepAwake.types';
/** Default tag, used when no tag has been specified in keep awake method calls. */
export const ExpoKeepAwakeTag = 'ExpoKeepAwakeDefaultTag';
/** @returns `true` on all platforms except [unsupported web browsers](https://caniuse.com/wake-lock). */
export async function isAvailableAsync(): Promise<boolean> {
if (ExpoKeepAwake.isAvailableAsync) {
return await ExpoKeepAwake.isAvailableAsync();
}
return true;
}
/**
* A React hook to keep the screen awake for as long as the owner component is mounted.
* The optionally provided `tag` argument is used when activating and deactivating the keep-awake
* feature. If unspecified, an ID unique to the owner component is used. See the documentation for
* `activateKeepAwakeAsync` below to learn more about the `tag` argument.
*
* @param tag Tag to lock screen sleep prevention. If not provided, an ID unique to the owner component is used.
* @param options Additional options for the keep awake hook.
*/
export function useKeepAwake(tag?: string, options?: KeepAwakeOptions): void {
const defaultTag = useId();
const tagOrDefault = tag ?? defaultTag;
useEffect(() => {
let isMounted = true;
activateKeepAwakeAsync(tagOrDefault).then(() => {
if (isMounted && ExpoKeepAwake.addListenerForTag && options?.listener) {
addListener(tagOrDefault, options.listener);
}
});
return () => {
isMounted = false;
if (options?.suppressDeactivateWarnings) {
deactivateKeepAwake(tagOrDefault).catch(() => {});
} else {
deactivateKeepAwake(tagOrDefault);
}
};
}, [tagOrDefault]);
}
// @needsAudit
/**
* Prevents the screen from sleeping until `deactivateKeepAwake` is called with the same `tag` value.
*
* If the `tag` argument is specified, the screen will not sleep until you call `deactivateKeepAwake`
* with the same `tag` argument. When using multiple `tags` for activation you'll have to deactivate
* each one in order to re-enable screen sleep. If tag is unspecified, the default `tag` is used.
*
* Web support [is limited](https://caniuse.com/wake-lock).
*
* @param tag Tag to lock screen sleep prevention. If not provided, the default tag is used.
* @deprecated use `activateKeepAwakeAsync` instead.
*/
export function activateKeepAwake(tag: string = ExpoKeepAwakeTag): Promise<void> {
console.warn('`activateKeepAwake` is deprecated. Use `activateKeepAwakeAsync` instead.');
return activateKeepAwakeAsync(tag);
}
// @needsAudit
/**
* Prevents the screen from sleeping until `deactivateKeepAwake` is called with the same `tag` value.
*
* If the `tag` argument is specified, the screen will not sleep until you call `deactivateKeepAwake`
* with the same `tag` argument. When using multiple `tags` for activation you'll have to deactivate
* each one in order to re-enable screen sleep. If tag is unspecified, the default `tag` is used.
*
* Web support [is limited](https://caniuse.com/wake-lock).
*
* @param tag Tag to lock screen sleep prevention. If not provided, the default tag is used.
*/
export async function activateKeepAwakeAsync(tag: string = ExpoKeepAwakeTag): Promise<void> {
await ExpoKeepAwake.activate?.(tag);
}
// @needsAudit
/**
* Releases the lock on screen-sleep prevention associated with the given `tag` value. If `tag`
* is unspecified, it defaults to the same default tag that `activateKeepAwake` uses.
*
* @param tag Tag to release the lock on screen sleep prevention. If not provided,
* the default tag is used.
*/
export async function deactivateKeepAwake(tag: string = ExpoKeepAwakeTag): Promise<void> {
await ExpoKeepAwake.deactivate?.(tag);
}
/**
* Observe changes to the keep awake timer.
* On web, this changes when navigating away from the active window/tab. No-op on native.
* @platform web
*
* @example
* ```ts
* KeepAwake.addListener(({ state }) => {
* // ...
* });
* ```
*/
export function addListener(
tagOrListener: string | KeepAwakeListener,
listener?: KeepAwakeListener
): Subscription {
// Assert so the type is non-nullable.
if (!ExpoKeepAwake.addListenerForTag) {
throw new UnavailabilityError('ExpoKeepAwake', 'addListenerForTag');
}
const tag = typeof tagOrListener === 'string' ? tagOrListener : ExpoKeepAwakeTag;
const _listener = typeof tagOrListener === 'function' ? tagOrListener : listener;
return ExpoKeepAwake.addListenerForTag(tag, _listener);
}
export * from './KeepAwake.types';
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