82 строки
2.0 KiB
JavaScript
82 строки
2.0 KiB
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @flow
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*/
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import RCTDeviceEventEmitter from '../EventEmitter/RCTDeviceEventEmitter';
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import NativeSettingsManager from './NativeSettingsManager';
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import invariant from 'invariant';
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const subscriptions: Array<{
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keys: Array<string>,
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callback: ?Function,
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...
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}> = [];
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const Settings = {
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_settings: (NativeSettingsManager &&
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NativeSettingsManager.getConstants().settings: any),
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get(key: string): mixed {
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// $FlowFixMe[object-this-reference]
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return this._settings[key];
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},
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set(settings: Object) {
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// $FlowFixMe[object-this-reference]
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this._settings = Object.assign(this._settings, settings);
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NativeSettingsManager.setValues(settings);
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},
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watchKeys(keys: string | Array<string>, callback: Function): number {
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if (typeof keys === 'string') {
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keys = [keys];
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}
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invariant(
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Array.isArray(keys),
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'keys should be a string or array of strings',
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);
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const sid = subscriptions.length;
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subscriptions.push({keys: keys, callback: callback});
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return sid;
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},
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clearWatch(watchId: number) {
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if (watchId < subscriptions.length) {
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subscriptions[watchId] = {keys: [], callback: null};
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}
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},
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_sendObservations(body: Object) {
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Object.keys(body).forEach(key => {
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const newValue = body[key];
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// $FlowFixMe[object-this-reference]
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const didChange = this._settings[key] !== newValue;
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// $FlowFixMe[object-this-reference]
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this._settings[key] = newValue;
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if (didChange) {
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subscriptions.forEach(sub => {
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if (sub.keys.indexOf(key) !== -1 && sub.callback) {
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sub.callback();
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}
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});
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}
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});
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},
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};
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RCTDeviceEventEmitter.addListener(
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'settingsUpdated',
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Settings._sendObservations.bind(Settings),
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);
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module.exports = Settings;
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