@singleton-i18n/angular-client
Version:
Singleton client code for Angular 10.
147 lines • 18.3 kB
JavaScript
/*
* Copyright 2019-2021 VMware, Inc.
* SPDX-License-Identifier: EPL-2.0
*/
import { Injectable } from '@angular/core';
import { Subject } from 'rxjs';
import { isDefined } from '../util';
import { VIPServiceConstants } from '../constants';
import { LanguageMap } from '../data/language.map';
import { I18nContext } from './i18n.context';
import * as i0 from "@angular/core";
import * as i1 from "./i18n.context";
export class LocaleService {
/**
* by default, the initial locale is en-US.
*/
constructor(i18nContext) {
this.i18nContext = i18nContext;
/**
* Fired when user changed current locale.
* Return the combination of language and region.
*/
this.userLocaleChanged = new Subject();
this.defaultLocale = VIPServiceConstants.ENGLISH;
this.setLocale(this.defaultLocale.languageCode, this.defaultLocale.regionCode);
}
/**
* initialize language and region combination at app bootstrap.
* @param language language code for translation and plural rule.
* @param region region code for the l2 formatting patterns.
*/
init(language, region) {
if (isDefined(language)) {
this.setLocale(language, region);
this.i18nContext.preferredLanguage = language;
}
if (isDefined(region)) {
this.i18nContext.preferredRegion = region;
}
}
/**
* set default locale and initialize current language and current region.
* this should be executed when the application start.
* @param defaultLocale will be used as fallback locale.
*/
setDefaultLocale(defaultLocale) {
this.defaultLocale = defaultLocale || this.defaultLocale;
this.setLocale(this.defaultLocale.languageCode, this.defaultLocale.regionCode);
}
setLocale(language, region) {
if (language !== this.currentLanguage ||
region !== this.currentRegion) {
this.currentLanguage = language;
this.currentRegion = region;
}
}
getCurrentLanguage() {
return this.currentLanguage;
}
setCurrentLanguage(currentLang) {
if (currentLang !== this.currentLanguage) {
this.currentLanguage = currentLang;
this.sendUserLocaleEvent();
}
}
getCurrentRegion() {
return this.currentRegion;
}
setCurrentRegion(currentRegion) {
if (currentRegion !== this.currentRegion) {
this.currentRegion = currentRegion;
this.sendUserLocaleEvent();
}
}
getCurrentLocale() {
return this.composeLocale(this.currentLanguage, this.currentRegion);
}
/**
* set current language and region combination at runtime.
* and notify VIP service to load corresponding i18n resource.
* @param language language code for translation and plural rule.
* @param region region code for the l2 formatting patterns.
*/
setCurrentLocale(language, region) {
this.setLocale(language, region);
this.sendUserLocaleEvent();
}
/**
* compose the sample locale structure based on the current usage scenarios.
* @param language language code for translation and plural rule.
* @param region region code for the l2 formatting patterns.
*/
composeLocale(language, region) {
return language && region ?
`${language}-${region}` : language;
}
sendUserLocaleEvent() {
this.userLocaleChanged.next(this.getCurrentLocale());
}
get isSourceLocale() {
return this.shouldSourceLocale(this.currentLanguage, this.currentRegion);
}
shouldSourceLocale(language, region) {
return this.shouldSourceLanguage(language)
&& isDefined(region)
&& region.toUpperCase() === this.defaultLocale.regionCode ? true
: this.shouldSourceLanguage(language) && !isDefined(region) ? true
: false;
}
resolveLanguageTag(language) {
if (!isDefined(language)) {
return language;
}
return language.split('_').join('-').toLocaleLowerCase();
}
get isSourceLanguage() {
return this.shouldSourceLanguage(this.currentLanguage);
}
shouldSourceLanguage(language) {
return language.toLowerCase() === this.defaultLocale.languageName ? true
: this.defaultLocale.languageCode.toLowerCase() === this.resolveLanguageTag(language) ? true
: `${this.defaultLocale.languageCode}-${this.defaultLocale.regionCode}`.toLowerCase()
=== this.resolveLanguageTag(language) ? true
: false;
}
/**
* Reserve interface for language tag normalization in bundle mode.
* @param language language code for translation and plural rule.
*/
normalizeLanguageCode(language) {
const lang = language.replace('_', '-').toLowerCase();
if (LanguageMap[lang]) {
return LanguageMap[lang][0];
}
return language;
}
}
LocaleService.ɵprov = i0.ɵɵdefineInjectable({ factory: function LocaleService_Factory() { return new LocaleService(i0.ɵɵinject(i1.I18nContext)); }, token: LocaleService, providedIn: "root" });
LocaleService.decorators = [
{ type: Injectable, args: [{
providedIn: 'root',
},] }
];
LocaleService.ctorParameters = () => [
{ type: I18nContext }
];
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* Copyright 2019-2021 VMware, Inc.\n * SPDX-License-Identifier: EPL-2.0\n */\nimport { Injectable } from '@angular/core';\nimport { Subject } from 'rxjs';\nimport { isDefined } from '../util';\nimport { VIPServiceConstants } from '../constants';\nimport { LanguageMap } from '../data/language.map';\nimport { I18nContext } from './i18n.context';\nexport interface VLocale {\n    readonly languageCode: string;\n    readonly languageName: string;\n    readonly regionCode: string;\n    readonly regionName: string;\n}\n\n@Injectable({\n    providedIn: 'root',\n})\nexport class LocaleService {\n\n    /**\n     * Fired when user changed current locale.\n     * Return the combination of language and region.\n     */\n    public userLocaleChanged: Subject<string> = new Subject<string>();\n    public defaultLocale: VLocale = VIPServiceConstants.ENGLISH;\n    private currentLanguage: string;\n    private currentRegion: string;\n\n    /**\n     * by default, the initial locale is en-US.\n     */\n    constructor(\n        protected i18nContext: I18nContext,\n    ) {\n        this.setLocale(this.defaultLocale.languageCode,\n            this.defaultLocale.regionCode);\n    }\n\n    /**\n     * initialize language and region combination at app bootstrap.\n     * @param language language code for translation and plural rule.\n     * @param region region code for the l2 formatting patterns.\n     */\n    public init(language: string, region?: string) {\n        if (isDefined(language)) {\n            this.setLocale(language, region);\n            this.i18nContext.preferredLanguage = language;\n        }\n        if (isDefined(region)) {\n            this.i18nContext.preferredRegion = region;\n        }\n    }\n\n    /**\n     * set default locale and initialize current language and current region.\n     * this should be executed when the application start.\n     * @param defaultLocale will be used as fallback locale.\n     */\n    public setDefaultLocale(defaultLocale: VLocale) {\n        this.defaultLocale = defaultLocale || this.defaultLocale;\n        this.setLocale(this.defaultLocale.languageCode,\n            this.defaultLocale.regionCode);\n    }\n\n    private setLocale(language: string, region?: string) {\n        if (language !== this.currentLanguage ||\n            region !== this.currentRegion) {\n            this.currentLanguage = language;\n            this.currentRegion = region;\n        }\n    }\n\n    public getCurrentLanguage(): string {\n        return this.currentLanguage;\n    }\n\n    public setCurrentLanguage(currentLang: string) {\n        if (currentLang !== this.currentLanguage) {\n            this.currentLanguage = currentLang;\n            this.sendUserLocaleEvent();\n        }\n    }\n\n    public getCurrentRegion(): string {\n        return this.currentRegion;\n    }\n\n    public setCurrentRegion(currentRegion: string) {\n        if (currentRegion !== this.currentRegion) {\n            this.currentRegion = currentRegion;\n            this.sendUserLocaleEvent();\n        }\n    }\n\n    public getCurrentLocale(): string {\n        return this.composeLocale(this.currentLanguage, this.currentRegion);\n    }\n\n    /**\n     * set current language and region combination at runtime.\n     * and notify VIP service to load corresponding i18n resource.\n     * @param language language code for translation and plural rule.\n     * @param region region code for the l2 formatting patterns.\n     */\n    public setCurrentLocale(language: string, region?: string) {\n        this.setLocale(language, region);\n        this.sendUserLocaleEvent();\n    }\n\n    /**\n     * compose the sample locale structure based on the current usage scenarios.\n     * @param language language code for translation and plural rule.\n     * @param region region code for the l2 formatting patterns.\n     */\n    public composeLocale(language: string, region: string) {\n        return language && region ?\n            `${language}-${region}` : language;\n    }\n\n    private sendUserLocaleEvent(): void {\n        this.userLocaleChanged.next(this.getCurrentLocale());\n    }\n\n    public get isSourceLocale(): boolean {\n        return this.shouldSourceLocale(this.currentLanguage, this.currentRegion);\n    }\n\n    public shouldSourceLocale(language: string, region?: string): boolean {\n        return this.shouldSourceLanguage(language)\n            && isDefined(region)\n            && region.toUpperCase() === this.defaultLocale.regionCode ? true\n            : this.shouldSourceLanguage(language) && !isDefined(region) ? true\n                : false;\n    }\n\n    private resolveLanguageTag(language: string) {\n        if (!isDefined(language)) {\n            return language;\n        }\n        return language.split('_').join('-').toLocaleLowerCase();\n    }\n\n    public get isSourceLanguage(): boolean {\n        return this.shouldSourceLanguage(this.currentLanguage);\n    }\n\n    public shouldSourceLanguage(language: string): boolean {\n        return language.toLowerCase() === this.defaultLocale.languageName ? true\n            : this.defaultLocale.languageCode.toLowerCase() === this.resolveLanguageTag(language) ? true\n                : `${this.defaultLocale.languageCode}-${this.defaultLocale.regionCode}`.toLowerCase()\n                    === this.resolveLanguageTag(language) ? true\n                    : false;\n    }\n\n    /**\n     * Reserve interface for language tag normalization in bundle mode.\n     * @param language language code for translation and plural rule.\n     */\n    public normalizeLanguageCode(language: string): string {\n        const lang = language.replace('_', '-').toLowerCase();\n        if (LanguageMap[lang]) {\n            return LanguageMap[lang][0];\n        }\n        return language;\n    }\n}\n"]}