/**
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* 语言服务
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*/
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import * as _ from 'lodash';
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/**
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* 语言提供者
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*/
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import { ILocalsProvider } from './locale/ILocalsProvider';
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import { JsonLocaleProvider } from './locale/JsonLocaleProvider';
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import { AntdLocaleProvider } from './locale/AntdLocaleProvider';
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class LocaleService {
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// tslint:disable-next-line:variable-name
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private _i18n: any = null;
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private loadedLanguages: string[] = [];
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private providers: any[] = [];
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public init(i18n: any, defaultLang: string) {
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this._i18n = i18n;
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this.loadedLanguages.push(defaultLang);
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}
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public addProvider(provider: any) {
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this.providers.push(provider);
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}
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public loadLanguageAsync(lang: any) {
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const i18n = this._i18n;
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if (i18n.locale !== lang) {
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if (!this.loadedLanguages.includes(lang)) {
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const langs = this.getLocales(lang);
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return Promise.all(langs)
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.then((msgs: any[]) => {
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const langMsg = {};
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msgs.map((item: any) => {
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if (item.data != null) {
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_.assignIn(langMsg, item.data);
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} else {
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_.assignIn(langMsg, item.default);
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}
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});
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i18n.setLocaleMessage(lang, langMsg);
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this.loadedLanguages.push(lang);
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return this.setI18nLanguage(lang);
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});
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}
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return Promise.resolve(this.setI18nLanguage(lang));
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}
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return Promise.resolve(lang);
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}
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private getLocales(lang: any) {
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const localeProviders: Array<Promise<any>> = [];
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this.providers.forEach((item: any) => {
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const provider = new item() as ILocalsProvider;
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localeProviders.push(provider.getMesage(lang));
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});
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return localeProviders;
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}
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private setI18nLanguage(lang: any) {
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this._i18n.locale = lang;
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return lang;
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}
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}
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const localeService = new LocaleService();
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/**
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* 提供者的顺序影响国际化信息，后者提供的国际化内容替换前者
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*/
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// 添加antd语言提供者
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localeService.addProvider(AntdLocaleProvider);
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// 添加json语言提供者
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localeService.addProvider(JsonLocaleProvider);
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export default localeService;
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