@singleton-i18n/angular-client
Version:
Singleton client code for Angular 10.
256 lines • 33.7 kB
JavaScript
import { __awaiter } from "tslib";
/*
* Copyright 2019-2021 VMware, Inc.
* SPDX-License-Identifier: EPL-2.0
*/
import { Injectable } from '@angular/core';
import { EventEmitter } from '@angular/core';
import { LocaleService } from './locale.service';
import { I18nLoader } from '../loader';
import { mergeObject, assign, deprecatedWarn } from '../util';
import { concat, Observable, forkJoin, of } from 'rxjs';
import { share, switchMap, take, catchError } from 'rxjs/operators';
import { getNameSpace, VIPConfigFactory } from '../config';
import { I18nContext } from './i18n.context';
export class VIPService {
constructor(localeService, i18nContext, currentLoader) {
this.localeService = localeService;
this.i18nContext = i18nContext;
this.currentLoader = currentLoader;
this.pending = false;
this.configs = [];
this.availableLocales = [];
this._onLocaleChange = new EventEmitter();
this._i18nScope = [];
this._localeData = {};
}
get onLocaleChange() {
return this._onLocaleChange;
}
get localeData() {
return this._localeData;
}
get i18nScope() {
return this._i18nScope;
}
/**
* Loading the i18n data at app module or root of lazy module.
* @param config For root module or lazy load mdule.
*/
initData(config) {
return __awaiter(this, void 0, void 0, function* () {
this.subscribeLocaleSubject();
this.registerComponent(config, true);
this.initLocale(config);
yield this.loadLocaleData();
});
}
/**
* Init locale by config passed from root module for compatibility.
* Will be removed in v9.
* @param config
*/
initLocale(config) {
if (config.locale || config.language || config.region) {
console.warn('Set language and region by configuration is deprecated, will be removed in v9. ' +
'Please use LocaleService.init instead.');
if (config.language && config.region) {
this.localeService.init(config.language, config.region);
}
else if (config.locale) {
this.localeService.init(config.locale);
}
}
}
/**
* Subscrible the locale changed event from view layer.
* For live UI translation update.
*/
subscribeLocaleSubject() {
if (!this.localeSubscription) {
this.localeSubscription = this.localeService.userLocaleChanged
.subscribe(() => { this.loadLocaleData(); });
}
}
/**
* Specifically, for the feature module which will be imported
* to root module or lazy load module. This method should be invoked
* in the constructor of feature module.
* @param config
* @param isMain
*/
registerComponent(config, isMain = false) {
this.subscribeLocaleSubject();
config = VIPConfigFactory(config, this.i18nContext);
this.mainConfig = isMain ? config : this.mainConfig;
this.configs.push(config);
this.updateI18nScope(config);
if (config.sourceBundles || config.sourceBundle) {
if (config.sourceBundle) {
deprecatedWarn('The sourceBundle option in i18n config', 'v10', 'sourceBundles');
}
const bundle = config.sourceBundles ? this.resetBundle(config.sourceBundles) : config.sourceBundle;
this.processBundle(bundle, this.localeService.defaultLocale.languageCode, config);
}
}
/**
* Tentative solution, if translation bundle is mounted.
* no longer to consider i18n scope which defined in
* feature module configuration.
* @param config
*/
updateI18nScope(config) {
if (config.i18nScope && !config.translationBundles) {
this._i18nScope = this._i18nScope.concat(config.i18nScope)
.filter((elem, index, self) => {
return index === self.indexOf(elem);
});
}
}
/**
* If the locale is processed or source locale, skip.
*/
loadLocaleData() {
return __awaiter(this, void 0, void 0, function* () {
const language = this.localeService.getCurrentLanguage();
const region = this.localeService.getCurrentRegion();
const locale = this.localeService.getCurrentLocale();
if (!this.localeService.isSourceLocale &&
this.availableLocales.indexOf(locale) === -1
&& this.i18nContext.i18nEnabled !== false) {
yield this.getLocaleData(language, region, locale)
.toPromise();
}
this.releaseLocale(locale);
});
}
getLocaleData(language, region, locale) {
const sequencesOfRequest = [];
let loadingLocaleData;
for (const config of this.configs) {
// Bypass sending HTTP call to get translation.
// Using local bundle instead.
// Using language to map local bundle.
// Using locale to store the translation.
if (config.translationBundles) {
const standardLanguageTag = this.localeService.normalizeLanguageCode(language);
const bundle = config.translationBundles[language] || config.translationBundles[standardLanguageTag];
if (bundle) {
this.processBundle(bundle, locale, config);
}
}
else {
sequencesOfRequest.push(this.currentLoader
.getLocaleData(config, language, region)
.pipe(share(), catchError((err) => {
console.error(`Can't fetch locale data.`, config, err);
return of(undefined);
})));
}
}
// No HTTP call required.
// Resource of current locale is available.
if (sequencesOfRequest.length < 1) {
this.availableLocales.push(locale);
return of([]);
}
loadingLocaleData = forkJoin(sequencesOfRequest);
this.loadingLocaleData = {
data: loadingLocaleData.pipe(take(1), share()), locale: locale
};
// FIFO
this.pending = true;
this.loadingLocaleData.data.subscribe((res) => {
this.storeResource(res, this._localeData, locale);
this.availableLocales.push(locale);
this.pending = false;
}, (err) => {
this.pending = false;
});
return loadingLocaleData;
}
resetBundle(sourceBundles) {
if (Array.isArray(sourceBundles)) {
return assign({}, sourceBundles);
}
return undefined;
}
processBundle(bundle, locale, config) {
const formattedBundle = { 'messages': {} };
const namespace = getNameSpace(config);
formattedBundle.messages[namespace] = bundle;
this.storeResource([formattedBundle], this._localeData, locale);
}
storeResource(res, localedata, locale) {
if (res) {
const supplemental = {};
localedata[locale] = localedata[locale] || {};
res.forEach((element) => {
if (element) {
if (element.messages) {
localedata[locale].messages =
mergeObject(localedata[locale].messages, element.messages);
}
if (element.categories) {
localedata[locale].categories =
mergeObject(localedata[locale].categories, element.categories);
if (element.categories.supplemental) {
Object.assign(supplemental, element.categories.supplemental);
}
}
}
});
if (localedata[locale].categories) {
localedata[locale].categories.supplemental = supplemental;
}
}
}
/**
* current represents current available locale to cover the initial status.
* since in some situation, the 'onLocaleChange' haven't be register always,
* or there is no event at time.
*/
get current() {
if (this.pending) {
const locale = this.loadingLocaleData.locale;
return Observable.create((observer) => {
const onComplete = () => {
observer.next(locale);
observer.complete();
};
this.loadingLocaleData.data.subscribe((res) => {
onComplete();
}, onComplete);
});
}
else {
return of(this.localeService.getCurrentLocale());
}
}
/**
* stream of 'available' locale.
*/
get stream() {
return concat(this.current, this.onLocaleChange.pipe(switchMap((locale) => {
return of(locale);
})));
}
releaseLocale(locale) {
this.onLocaleChange.emit(locale);
}
registerSourceBundles(sourceBundles, config) {
if (sourceBundles) {
const bundle = this.resetBundle(sourceBundles);
this.processBundle(bundle, this.localeService.defaultLocale.languageCode, config);
}
}
}
VIPService.decorators = [
{ type: Injectable }
];
VIPService.ctorParameters = () => [
{ type: LocaleService },
{ type: I18nContext },
{ type: I18nLoader }
];
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* Copyright 2019-2021 VMware, Inc.\n * SPDX-License-Identifier: EPL-2.0\n */\nimport { Injectable } from '@angular/core';\nimport { EventEmitter } from '@angular/core';\nimport { LocaleService } from './locale.service';\nimport { I18nLoader } from '../loader';\nimport { mergeObject, assign, deprecatedWarn } from '../util';\nimport { concat, Observable, forkJoin, Observer, of, Subscription } from 'rxjs';\nimport { share, switchMap, take, catchError } from 'rxjs/operators';\nimport { VIPConfig, getNameSpace, VIPConfigFactory } from '../config';\nimport { sourceBundleObject } from './l10n.service';\nimport { I18nContext } from './i18n.context';\n\nexport interface LocaleData {\n    categories: Object;\n    messages: { [key: string]: any };\n}\n\nexport interface LoadingLocaleData {\n    locale: string;\n    data: Observable<any>;\n}\n\n@Injectable()\nexport class VIPService {\n    public mainConfig: VIPConfig;\n    private pending = false;\n    private loadingLocaleData: LoadingLocaleData;\n    private configs: VIPConfig[] = [];\n    private availableLocales: Array<string> = [];\n    private localeSubscription: Subscription;\n    private _onLocaleChange: EventEmitter<string> = new EventEmitter<string>();\n    private _i18nScope: Array<string> = [];\n    private _localeData: any = {};\n\n    constructor(\n        protected localeService: LocaleService,\n        protected i18nContext: I18nContext,\n        public currentLoader: I18nLoader\n    ) { }\n\n    get onLocaleChange(): EventEmitter<string> {\n        return this._onLocaleChange;\n    }\n\n    get localeData(): any {\n        return this._localeData;\n    }\n\n    get i18nScope() {\n        return this._i18nScope;\n    }\n\n    /**\n     * Loading the i18n data at app module or root of lazy module.\n     * @param config For root module or lazy load mdule.\n     */\n    public async initData(config: VIPConfig): Promise<any> {\n        this.subscribeLocaleSubject();\n        this.registerComponent(config, true);\n        this.initLocale(config);\n        await this.loadLocaleData();\n    }\n\n    /**\n     * Init locale by config passed from root module for compatibility.\n     * Will be removed in v9.\n     * @param config\n     */\n    private initLocale(config: VIPConfig) {\n        if ( config.locale || config.language || config.region ) {\n            console.warn(\n                'Set language and region by configuration is deprecated, will be removed in v9. ' +\n                'Please use LocaleService.init instead.');\n            if ( config.language && config.region ) {\n                this.localeService.init(config.language, config.region);\n            } else if (config.locale) {\n                this.localeService.init(config.locale);\n            }\n        }\n    }\n    /**\n     * Subscrible the locale changed event from view layer.\n     * For live UI translation update.\n     */\n    public subscribeLocaleSubject() {\n        if (!this.localeSubscription) {\n            this.localeSubscription = this.localeService.userLocaleChanged\n                .subscribe(() => { this.loadLocaleData(); });\n        }\n    }\n\n    /**\n     * Specifically, for the feature module which will be imported\n     * to root module or lazy load module. This method should be invoked\n     * in the constructor of feature module.\n     * @param config\n     * @param isMain\n     */\n    public registerComponent(config: VIPConfig, isMain: boolean = false) {\n        this.subscribeLocaleSubject();\n        config = VIPConfigFactory(config, this.i18nContext);\n        this.mainConfig = isMain ? config : this.mainConfig;\n        this.configs.push(config);\n        this.updateI18nScope(config);\n        if (config.sourceBundles || config.sourceBundle) {\n            if (config.sourceBundle) {\n                deprecatedWarn('The sourceBundle option in i18n config', 'v10', 'sourceBundles')\n            }\n            const bundle = config.sourceBundles ? this.resetBundle(config.sourceBundles) : config.sourceBundle;\n            this.processBundle(bundle,\n                this.localeService.defaultLocale.languageCode, config);\n        }\n    }\n\n    /**\n     * Tentative solution, if translation bundle is mounted.\n     * no longer to consider i18n scope which defined in\n     * feature module configuration.\n     * @param config\n     */\n    private updateI18nScope(config: VIPConfig) {\n        if (config.i18nScope && !config.translationBundles) {\n            this._i18nScope = this._i18nScope.concat(config.i18nScope)\n                .filter( (elem, index, self) => {\n                    return index === self.indexOf(elem);\n                });\n        }\n    }\n\n    /**\n     * If the locale is processed or source locale, skip.\n     */\n    public async loadLocaleData(): Promise<any> {\n        const language = this.localeService.getCurrentLanguage();\n        const region = this.localeService.getCurrentRegion();\n        const locale = this.localeService.getCurrentLocale();\n        if (!this.localeService.isSourceLocale &&\n            this.availableLocales.indexOf(locale) === -1\n            && this.i18nContext.i18nEnabled !== false\n        ) {\n            await this.getLocaleData(language, region, locale)\n                .toPromise();\n        }\n        this.releaseLocale(locale);\n    }\n\n    private getLocaleData(language: string, region: string, locale: string): Observable<any> {\n        const sequencesOfRequest: Array<Observable<any>> = [];\n        let loadingLocaleData: Observable<any>;\n        for (const config of this.configs) {\n            // Bypass sending HTTP call to get translation.\n            // Using local bundle instead.\n            // Using language to map local bundle.\n            // Using locale to store the translation.\n            if (config.translationBundles) {\n                const standardLanguageTag = this.localeService.normalizeLanguageCode(language);\n                const bundle = config.translationBundles[language] || config.translationBundles[standardLanguageTag];\n                if (bundle) {\n                    this.processBundle(bundle, locale, config);\n                }\n            } else {\n                sequencesOfRequest.push(this.currentLoader\n                    .getLocaleData(config, language, region)\n                    .pipe(share(), catchError((err) => {\n                        console.error(`Can't fetch locale data.`, config, err);\n                        return of(undefined);\n                    })));\n            }\n        }\n\n        // No HTTP call required.\n        // Resource of current locale is available.\n        if (sequencesOfRequest.length < 1) {\n            this.availableLocales.push(locale);\n            return of([]);\n        }\n\n        loadingLocaleData = forkJoin(sequencesOfRequest);\n        this.loadingLocaleData = {\n            data: loadingLocaleData.pipe(\n                take(1),\n                share()\n            ), locale: locale\n        };\n\n        // FIFO\n        this.pending = true;\n        this.loadingLocaleData.data.subscribe((res: LocaleData) => {\n            this.storeResource(res, this._localeData, locale);\n            this.availableLocales.push(locale);\n            this.pending = false;\n        }, (err: any) => {\n            this.pending = false;\n        });\n        return loadingLocaleData;\n    }\n\n    private resetBundle(sourceBundles: any) {\n        if (Array.isArray(sourceBundles)) {\n            return assign({}, sourceBundles);\n        }\n        return undefined;\n    }\n\n    private processBundle(bundle: any, locale: string, config: VIPConfig) {\n        const formattedBundle = { 'messages': {} };\n        const namespace = getNameSpace(config);\n        (formattedBundle.messages as any)[namespace] = bundle;\n        this.storeResource([formattedBundle],\n            this._localeData, locale);\n    }\n\n    private storeResource(res: any, localedata: any, locale: string) {\n        if (res) {\n            const supplemental: Object = {};\n            localedata[locale] = localedata[locale] || {};\n            res.forEach((element: any) => {\n                if (element) {\n                    if (element.messages) {\n                        localedata[locale].messages =\n                            mergeObject(localedata[locale].messages, element.messages);\n                    }\n                    if (element.categories) {\n                        localedata[locale].categories =\n                            mergeObject(localedata[locale].categories, element.categories);\n                        if (element.categories.supplemental) {\n                            Object.assign(supplemental, element.categories.supplemental);\n                        }\n                    }\n                }\n            });\n            if (localedata[locale].categories) {\n                localedata[locale].categories.supplemental = supplemental;\n            }\n        }\n    }\n\n    /**\n     * current represents current available locale to cover the initial status.\n     * since in some situation, the 'onLocaleChange' haven't be register always,\n     * or there is no event at time.\n     */\n    get current(): Observable<string | any> {\n        if (this.pending) {\n            const locale = this.loadingLocaleData.locale;\n            return Observable.create((observer: Observer<string>) => {\n                const onComplete = () => {\n                    observer.next(locale);\n                    observer.complete();\n                };\n                this.loadingLocaleData.data.subscribe((res: LocaleData) => {\n                    onComplete();\n                }, onComplete);\n            });\n        } else {\n            return of(this.localeService.getCurrentLocale());\n        }\n    }\n\n    /**\n     * stream of 'available' locale.\n     */\n    get stream(): Observable<string | any> {\n        return concat(\n            this.current,\n            this.onLocaleChange.pipe(\n                switchMap((locale: string) => {\n                    return of(locale);\n                })\n            ));\n    }\n\n    private releaseLocale(locale: string) {\n        this.onLocaleChange.emit(locale);\n    }\n\n    public registerSourceBundles(sourceBundles: sourceBundleObject[], config: VIPConfig) {\n        if (sourceBundles) {\n            const bundle = this.resetBundle(sourceBundles);\n            this.processBundle(bundle,\n                this.localeService.defaultLocale.languageCode, config);\n        }\n    }\n}\n"]}