@jsverse/transloco-locale
Version:
The localization (l10n) library plugin for Transloco
149 lines • 21.1 kB
JavaScript
import { DestroyRef, inject, Injectable } from '@angular/core';
import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
import { getBrowserCultureLang, TranslocoService } from '@jsverse/transloco';
import { BehaviorSubject } from 'rxjs';
import { distinctUntilChanged, filter, map } from 'rxjs/operators';
import { isLocaleFormat, toDate } from './helpers';
import { getDefaultOptions } from './shared';
import { TRANSLOCO_LOCALE_CONFIG, TRANSLOCO_LOCALE_CURRENCY_MAPPING, TRANSLOCO_LOCALE_DEFAULT_CURRENCY, TRANSLOCO_LOCALE_DEFAULT_LOCALE, TRANSLOCO_LOCALE_LANG_MAPPING, } from './transloco-locale.config';
import { TRANSLOCO_DATE_TRANSFORMER, TRANSLOCO_NUMBER_TRANSFORMER, } from './transloco-locale.transformers';
import * as i0 from "@angular/core";
export class TranslocoLocaleService {
translocoService = inject(TranslocoService);
langLocaleMapping = inject(TRANSLOCO_LOCALE_LANG_MAPPING);
defaultLocale = inject(TRANSLOCO_LOCALE_DEFAULT_LOCALE);
defaultCurrency = inject(TRANSLOCO_LOCALE_DEFAULT_CURRENCY);
localeCurrencyMapping = inject(TRANSLOCO_LOCALE_CURRENCY_MAPPING);
numberTransformer = inject(TRANSLOCO_NUMBER_TRANSFORMER);
dateTransformer = inject(TRANSLOCO_DATE_TRANSFORMER);
localeConfig = inject(TRANSLOCO_LOCALE_CONFIG);
browserLocale = getBrowserCultureLang() || this.defaultLocale;
_locale = '';
locale = new BehaviorSubject(this._locale);
localeChanges$ = this.locale.pipe(distinctUntilChanged());
constructor() {
inject(DestroyRef).onDestroy(() => {
// Complete subjects to release observers if users forget to unsubscribe manually.
// This is important in server-side rendering.
this.locale.complete();
this.locale.unsubscribe();
});
// Initialize locale with fallback chain
this.setLocale(this.initializeLocale());
// Subscribe to language changes
this.translocoService.langChanges$
.pipe(map((lang) => this.toLocale(lang)), filter(Boolean), takeUntilDestroyed())
.subscribe((locale) => this.setLocale(locale));
}
getDefaultLocale() {
return this.defaultLocale;
}
getLocale() {
return this._locale;
}
setLocale(locale) {
if (!isLocaleFormat(locale)) {
console.error(`${locale} isn't a valid locale format`);
return;
}
this.locale.next(locale);
this._locale = locale;
}
/**
* Get the currency symbol for the currently set locale.
*/
getCurrencySymbol(locale = this.getLocale()) {
const currency = this.localeCurrencyMapping[locale];
const numberFormat = new Intl.NumberFormat(locale, {
style: 'currency',
currencyDisplay: 'symbol',
currency,
minimumFractionDigits: 0,
maximumFractionDigits: 0,
});
const pivot = 0;
return numberFormat
.format(pivot)
.split(pivot.toString())
.map((element) => element.trim())
.find((element) => !!element);
}
/**
* Transform a date into the locale's date format.
*
* The date expression: a `Date` object, a number
* (milliseconds since UTC epoch), or an ISO string (https://www.w3.org/TR/NOTE-datetime).
*
* @example
*
* localizeDate(new Date(2019, 9, 7, 12, 0, 0)) // 10/7/2019
* localizeDate(date, 'en-US', { dateStyle: 'medium', timeStyle: 'medium' }) // Sep 10, 2019, 10:46:12 PM
* localizeDate(date) 'en-US', { timeZone: 'UTC', timeStyle: 'full' } // 7:40:32 PM Coordinated Universal Time
* localizeDate(1, 'en-US', { dateStyle: 'medium' }) // Jan 1, 1970
* localizeDate('2019-02-08', 'en-US', { dateStyle: 'medium' }) // Feb 8, 2019
*/
localizeDate(date, locale = this.getLocale(), options = {}) {
const resolved = options ?? getDefaultOptions(locale, 'date', this.localeConfig);
return this.dateTransformer.transform(toDate(date), locale, resolved);
}
/**
* Transform a number into the locale's number format according to the number type.
*
* localizeNumber(1234567890, 'decimal') // 1,234,567,890
* localizeNumber(0.5, 'percent') // 50%
* localizeNumber(1000, 'currency') // $1,000.00
*/
localizeNumber(value, style, locale = this.getLocale(), options) {
let resolved = options ?? getDefaultOptions(locale, style, this.localeConfig);
if (style === 'currency') {
resolved = {
...resolved,
currency: resolved.currency || this._resolveCurrencyCode(locale),
};
}
return this.numberTransformer.transform(value, style, locale, resolved);
}
/**
* @internal
*/
_resolveCurrencyCode(locale = this.getLocale()) {
return this.localeCurrencyMapping[locale] || this.defaultCurrency;
}
toLocale(val) {
if (this.langLocaleMapping[val]) {
return this.langLocaleMapping[val];
}
if (isLocaleFormat(val)) {
return val;
}
return '';
}
/*
* Get the browser's language and validate.
* If the browser's language is not set, it will fall back to the active language from TranslocoService.
* If active language from TranslocoService is not valid, it will fall back to the default locale.
* If the default locale is not valid, it will return the default locale as a string
*/
initializeLocale() {
const browserLocale = this.toLocale(this.browserLocale);
if (browserLocale)
return browserLocale;
const activeLang = this.translocoService.getActiveLang();
if (activeLang) {
const locale = this.toLocale(activeLang);
if (locale)
return locale;
}
const defaultLocaleResolved = this.toLocale(this.defaultLocale);
if (defaultLocaleResolved)
return defaultLocaleResolved;
return this.defaultLocale; // Fallback to a default locale
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.9", ngImport: i0, type: TranslocoLocaleService, deps: [], target: i0.ɵɵFactoryTarget.Injectable });
static ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "18.2.9", ngImport: i0, type: TranslocoLocaleService, providedIn: 'root' });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.9", ngImport: i0, type: TranslocoLocaleService, decorators: [{
type: Injectable,
args: [{ providedIn: 'root' }]
}], ctorParameters: () => [] });
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{ DestroyRef, inject, Injectable } from '@angular/core';\nimport { takeUntilDestroyed } from '@angular/core/rxjs-interop';\nimport { getBrowserCultureLang, TranslocoService } from '@jsverse/transloco';\nimport { BehaviorSubject } from 'rxjs';\nimport { distinctUntilChanged, filter, map } from 'rxjs/operators';\n\nimport { isLocaleFormat, toDate } from './helpers';\nimport { getDefaultOptions } from './shared';\nimport {\n  TRANSLOCO_LOCALE_CONFIG,\n  TRANSLOCO_LOCALE_CURRENCY_MAPPING,\n  TRANSLOCO_LOCALE_DEFAULT_CURRENCY,\n  TRANSLOCO_LOCALE_DEFAULT_LOCALE,\n  TRANSLOCO_LOCALE_LANG_MAPPING,\n} from './transloco-locale.config';\nimport {\n  TRANSLOCO_DATE_TRANSFORMER,\n  TRANSLOCO_NUMBER_TRANSFORMER,\n} from './transloco-locale.transformers';\nimport {\n  DateFormatOptions,\n  Locale,\n  LocaleConfig,\n  NumberStyles,\n  ValidDate,\n} from './transloco-locale.types';\n\n@Injectable({ providedIn: 'root' })\nexport class TranslocoLocaleService {\n  private translocoService = inject(TranslocoService);\n  private langLocaleMapping = inject(TRANSLOCO_LOCALE_LANG_MAPPING);\n  private defaultLocale = inject(TRANSLOCO_LOCALE_DEFAULT_LOCALE);\n  private defaultCurrency = inject(TRANSLOCO_LOCALE_DEFAULT_CURRENCY);\n  private localeCurrencyMapping = inject(TRANSLOCO_LOCALE_CURRENCY_MAPPING);\n  private numberTransformer = inject(TRANSLOCO_NUMBER_TRANSFORMER);\n  private dateTransformer = inject(TRANSLOCO_DATE_TRANSFORMER);\n  private localeConfig: LocaleConfig = inject(TRANSLOCO_LOCALE_CONFIG);\n  private browserLocale = getBrowserCultureLang() || this.defaultLocale;\n\n  private _locale = '';\n  private locale = new BehaviorSubject<Locale>(this._locale);\n\n  readonly localeChanges$ = this.locale.pipe(distinctUntilChanged());\n\n  constructor() {\n    inject(DestroyRef).onDestroy(() => {\n      // Complete subjects to release observers if users forget to unsubscribe manually.\n      // This is important in server-side rendering.\n      this.locale.complete();\n      this.locale.unsubscribe();\n    });\n\n    // Initialize locale with fallback chain\n    this.setLocale(this.initializeLocale());\n\n    // Subscribe to language changes\n    this.translocoService.langChanges$\n      .pipe(\n        map((lang) => this.toLocale(lang)),\n        filter(Boolean),\n        takeUntilDestroyed(),\n      )\n      .subscribe((locale: Locale) => this.setLocale(locale));\n  }\n\n  getDefaultLocale() {\n    return this.defaultLocale;\n  }\n\n  getLocale() {\n    return this._locale;\n  }\n\n  setLocale(locale: Locale) {\n    if (!isLocaleFormat(locale)) {\n      console.error(`${locale} isn't a valid locale format`);\n      return;\n    }\n\n    this.locale.next(locale);\n    this._locale = locale;\n  }\n\n  /**\n   * Get the currency symbol for the currently set locale.\n   */\n  getCurrencySymbol(locale = this.getLocale()) {\n    const currency = this.localeCurrencyMapping[locale];\n    const numberFormat = new Intl.NumberFormat(locale, {\n      style: 'currency',\n      currencyDisplay: 'symbol',\n      currency,\n      minimumFractionDigits: 0,\n      maximumFractionDigits: 0,\n    });\n\n    const pivot = 0;\n\n    return numberFormat\n      .format(pivot)\n      .split(pivot.toString())\n      .map((element) => element.trim())\n      .find((element) => !!element);\n  }\n\n  /**\n   * Transform a date into the locale's date format.\n   *\n   * The date expression: a `Date` object, a number\n   * (milliseconds since UTC epoch), or an ISO string (https://www.w3.org/TR/NOTE-datetime).\n   *\n   * @example\n   *\n   * localizeDate(new Date(2019, 9, 7, 12, 0, 0)) // 10/7/2019\n   * localizeDate(date, 'en-US', { dateStyle: 'medium', timeStyle: 'medium' }) // Sep 10, 2019, 10:46:12 PM\n   * localizeDate(date) 'en-US', { timeZone: 'UTC', timeStyle: 'full' } // 7:40:32 PM Coordinated Universal Time\n   * localizeDate(1, 'en-US', { dateStyle: 'medium' }) // Jan 1, 1970\n   * localizeDate('2019-02-08', 'en-US', { dateStyle: 'medium' }) // Feb 8, 2019\n   */\n  localizeDate(\n    date: ValidDate,\n    locale: Locale = this.getLocale(),\n    options: DateFormatOptions = {},\n  ): string {\n    const resolved =\n      options ?? getDefaultOptions(locale, 'date', this.localeConfig);\n\n    return this.dateTransformer.transform(toDate(date), locale, resolved);\n  }\n\n  /**\n   * Transform a number into the locale's number format according to the number type.\n   *\n   * localizeNumber(1234567890, 'decimal') // 1,234,567,890\n   * localizeNumber(0.5, 'percent') // 50%\n   * localizeNumber(1000, 'currency') // $1,000.00\n   */\n  localizeNumber(\n    value: number | string,\n    style: NumberStyles,\n    locale: Locale = this.getLocale(),\n    options?: Intl.NumberFormatOptions,\n  ): string {\n    let resolved =\n      options ?? getDefaultOptions(locale, style, this.localeConfig);\n\n    if (style === 'currency') {\n      resolved = {\n        ...resolved,\n        currency: resolved.currency || this._resolveCurrencyCode(locale),\n      };\n    }\n\n    return this.numberTransformer.transform(value, style, locale, resolved);\n  }\n\n  /**\n   * @internal\n   */\n  _resolveCurrencyCode(locale: Locale = this.getLocale()) {\n    return this.localeCurrencyMapping[locale] || this.defaultCurrency;\n  }\n\n  private toLocale(val: string | Locale): Locale {\n    if (this.langLocaleMapping[val]) {\n      return this.langLocaleMapping[val];\n    }\n\n    if (isLocaleFormat(val)) {\n      return val;\n    }\n\n    return '';\n  }\n\n  /*\n   * Get the browser's language and validate.\n   * If the browser's language is not set, it will fall back to the active language from TranslocoService.\n   * If active language from TranslocoService is not valid, it will fall back to the default locale.\n   * If the default locale is not valid, it will return the default locale as a string\n   */\n\n  private initializeLocale(): Locale {\n    const browserLocale = this.toLocale(this.browserLocale);\n    if (browserLocale) return browserLocale;\n\n    const activeLang = this.translocoService.getActiveLang();\n    if (activeLang) {\n      const locale = this.toLocale(activeLang);\n      if (locale) return locale;\n    }\n\n    const defaultLocaleResolved = this.toLocale(this.defaultLocale);\n    if (defaultLocaleResolved) return defaultLocaleResolved;\n\n    return this.defaultLocale; // Fallback to a default locale\n  }\n}\n"]}