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