92 lines
2.4 KiB
JavaScript
92 lines
2.4 KiB
JavaScript
// @flow
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import {AsyncStorage} from 'react-native'
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import platform from '../native-base-theme/variables/platform';
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import platformDark from '../native-base-theme/variables/platformDark';
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import getTheme from '../native-base-theme/components';
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const nightModeKey = 'nightMode';
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/**
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* Singleton class used to manage themes
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*/
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export default class ThemeManager {
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static instance: ThemeManager | null = null;
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nightMode: boolean;
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updateThemeCallback: Function;
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constructor() {
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this.nightMode = false;
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this.updateThemeCallback = null;
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}
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/**
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* Get this class instance or create one if none is found
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* @returns {ThemeManager}
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*/
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static getInstance(): ThemeManager {
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return ThemeManager.instance === null ?
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ThemeManager.instance = new ThemeManager() :
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ThemeManager.instance;
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}
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/**
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* Set the function to be called when the theme is changed (allows for general reload of the app)
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* @param callback Function to call after theme change
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*/
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setUpdateThemeCallback(callback: ?Function) {
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this.updateThemeCallback = callback;
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}
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/**
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* Read async storage to get preferences
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* @returns {Promise<void>}
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*/
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async getDataFromPreferences(): Promise<void> {
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let result: string = await AsyncStorage.getItem(nightModeKey);
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if (result === '1')
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this.nightMode = true;
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// console.log('nightmode: ' + this.nightMode);
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}
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/**
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* Set night mode and save it to preferences
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*
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* @param isNightMode Whether to enable night mode
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*/
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setNightMode(isNightMode: boolean) {
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this.nightMode = isNightMode;
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AsyncStorage.setItem(nightModeKey, isNightMode ? '1' : '0');
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if (this.updateThemeCallback !== null)
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this.updateThemeCallback();
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}
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/**
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* @returns {boolean} Night mode state
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*/
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getNightMode(): boolean {
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return this.nightMode;
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}
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/**
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* Get the current theme based on night mode
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* @returns {Object}
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*/
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getCurrentTheme(): Object {
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if (this.nightMode)
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return getTheme(platformDark);
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else
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return getTheme(platform);
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}
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/**
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* Get the variables contained in the current theme
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* @returns {Object}
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*/
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getCurrentThemeVariables(): Object {
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return this.getCurrentTheme().variables;
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}
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};
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