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ngx-translate-cache

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ngx-translate extension to facilitate language cache.

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import { Inject, Injectable, InjectionToken } from '@angular/core'; import * as i0 from "@angular/core"; export var CacheMechanism; (function (CacheMechanism) { CacheMechanism.LocalStorage = 'LocalStorage'; CacheMechanism.Cookie = 'Cookie'; })(CacheMechanism || (CacheMechanism = {})); export const CACHE_NAME = new InjectionToken('CACHE_NAME'); export const CACHE_MECHANISM = new InjectionToken('CACHE_MECHANISM'); export const COOKIE_EXPIRY = new InjectionToken('COOKIE_EXPIRY'); export const COOKIE_ATTRIBUTES = new InjectionToken('COOKIE_ATTRIBUTES'); const DEFAULT_CACHE_NAME = 'lang'; const DEFAULT_CACHE_MECHANISM = CacheMechanism.LocalStorage; const DEFAULT_COOKIE_EXPIRY = 720; export class TranslateCacheSettings { constructor(cacheName = DEFAULT_CACHE_NAME, cacheMechanism = DEFAULT_CACHE_MECHANISM, cookieExpiry = DEFAULT_COOKIE_EXPIRY, cookieAttributes) { this.cacheName = cacheName; this.cacheMechanism = cacheMechanism; this.cookieExpiry = cookieExpiry; this.cookieAttributes = cookieAttributes; } static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.0.8", ngImport: i0, type: TranslateCacheSettings, deps: [{ token: CACHE_NAME }, { token: CACHE_MECHANISM }, { token: COOKIE_EXPIRY }, { token: COOKIE_ATTRIBUTES }], target: i0.ɵɵFactoryTarget.Injectable }); } static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "17.0.8", ngImport: i0, type: TranslateCacheSettings }); } } i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.0.8", ngImport: i0, type: TranslateCacheSettings, decorators: [{ type: Injectable }], ctorParameters: () => [{ type: undefined, decorators: [{ type: Inject, args: [CACHE_NAME] }] }, { type: undefined, decorators: [{ type: Inject, args: [CACHE_MECHANISM] }] }, { type: undefined, decorators: [{ type: Inject, args: [COOKIE_EXPIRY] }] }, { type: undefined, decorators: [{ type: Inject, args: [COOKIE_ATTRIBUTES] }] }] }); /* Not injectable */ export class TranslateCacheService { constructor(translateService, translateCacheSettings) { this.translateService = translateService; this.translateCacheSettings = translateCacheSettings; } init() { this.translateService.onLangChange .subscribe((event) => { if (this.translateCacheSettings.cacheMechanism === CacheMechanism.LocalStorage) { return this.cacheWithLocalStorage(event.lang); } if (this.translateCacheSettings.cacheMechanism === CacheMechanism.Cookie) { return this.cacheWithCookies(event.lang); } }); const currentLang = this.getCachedLanguage() || this.translateService.getBrowserLang(); if (currentLang) { this.translateService.use(currentLang); } } getCachedLanguage() { if (this.translateCacheSettings.cacheMechanism === CacheMechanism.LocalStorage) { return this.cacheWithLocalStorage(); } if (this.translateCacheSettings.cacheMechanism === CacheMechanism.Cookie) { return this.cacheWithCookies(); } } cacheWithLocalStorage(value) { if (typeof window === 'undefined' || typeof window.localStorage === 'undefined') { return; } try { if (value) { window.localStorage.setItem(this.translateCacheSettings.cacheName, value); return; } return window.localStorage.getItem(this.translateCacheSettings.cacheName); } catch (e) { return; } } cacheWithCookies(value) { if (typeof document === 'undefined' || typeof document.cookie === 'undefined') { return; } try { const name = encodeURIComponent(this.translateCacheSettings.cacheName); if (value) { let cookieString = `${name}=${encodeURIComponent(value)}`; if (this.translateCacheSettings.cookieExpiry >= 0) { const date = new Date(); date.setTime(date.getTime() + this.translateCacheSettings.cookieExpiry * 3600000); cookieString += `;expires=${date.toUTCString()}`; } if (this.translateCacheSettings.cookieAttributes) { cookieString += ';' + this.translateCacheSettings.cookieAttributes; } document.cookie = cookieString; return; } const regexp = new RegExp('(?:^' + name + '|;\\s*' + name + ')=(.*?)(?:;|$)', 'g'); const result = regexp.exec(document.cookie); return decodeURIComponent(result[1]); } catch (e) { return; } } } //# 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{ Inject, Injectable, InjectionToken, Provider } from '@angular/core';\nimport { TranslateService, TranslationChangeEvent } from '@ngx-translate/core';\n\nexport type CacheMechanismType = 'LocalStorage' | 'Cookie';\nexport namespace CacheMechanism {\n  export const LocalStorage: CacheMechanismType = 'LocalStorage';\n  export const Cookie: CacheMechanismType = 'Cookie';\n}\n\nexport const CACHE_NAME = new InjectionToken<string>('CACHE_NAME');\nexport const CACHE_MECHANISM = new InjectionToken<string>('CACHE_MECHANISM');\nexport const COOKIE_EXPIRY = new InjectionToken<string>('COOKIE_EXPIRY');\nexport const COOKIE_ATTRIBUTES = new InjectionToken<string>('COOKIE_ATTRIBUTES');\n\nexport interface TranslateCacheConfig {\n  cacheService: Provider;\n  cacheName?: string;\n  cacheMechanism?: CacheMechanismType;\n  cookieExpiry?: number;\n  cookieAttributes?: string;\n}\n\nconst DEFAULT_CACHE_NAME = 'lang';\nconst DEFAULT_CACHE_MECHANISM = CacheMechanism.LocalStorage;\nconst DEFAULT_COOKIE_EXPIRY = 720;\n\n@Injectable()\nexport class TranslateCacheSettings {\n  constructor(@Inject(CACHE_NAME) public cacheName: string = DEFAULT_CACHE_NAME,\n              @Inject(CACHE_MECHANISM) public cacheMechanism: string = DEFAULT_CACHE_MECHANISM,\n              @Inject(COOKIE_EXPIRY) public cookieExpiry: number = DEFAULT_COOKIE_EXPIRY,\n              @Inject(COOKIE_ATTRIBUTES) public cookieAttributes: string) {}\n}\n\n/* Not injectable */\nexport class TranslateCacheService {\n  constructor(private translateService: TranslateService,\n              private translateCacheSettings: TranslateCacheSettings) {}\n\n  public init(): void {\n    this.translateService.onLangChange\n      .subscribe((event: TranslationChangeEvent) => {\n        if (this.translateCacheSettings.cacheMechanism === CacheMechanism.LocalStorage) {\n          return this.cacheWithLocalStorage(event.lang);\n        }\n\n        if (this.translateCacheSettings.cacheMechanism === CacheMechanism.Cookie) {\n          return this.cacheWithCookies(event.lang);\n        }\n      });\n\n    const currentLang = this.getCachedLanguage() || this.translateService.getBrowserLang();\n\n    if (currentLang) { this.translateService.use(currentLang); }\n  }\n\n  public getCachedLanguage(): string {\n    if (this.translateCacheSettings.cacheMechanism === CacheMechanism.LocalStorage) {\n      return this.cacheWithLocalStorage();\n    }\n\n    if (this.translateCacheSettings.cacheMechanism === CacheMechanism.Cookie) {\n      return this.cacheWithCookies();\n    }\n  }\n\n  private cacheWithLocalStorage(value?: string): string {\n    if (typeof window === 'undefined' || typeof window.localStorage === 'undefined') { return; }\n\n    try {\n      if (value) { window.localStorage.setItem(this.translateCacheSettings.cacheName, value); return; }\n\n      return window.localStorage.getItem(this.translateCacheSettings.cacheName);\n    } catch (e) { return; }\n  }\n\n  private cacheWithCookies(value?: string): string {\n    if (typeof document === 'undefined' || typeof document.cookie === 'undefined') { return; }\n\n    try {\n      const name = encodeURIComponent(this.translateCacheSettings.cacheName);\n\n      if (value) {\n        let cookieString = `${name}=${encodeURIComponent(value)}`;\n\n        if (this.translateCacheSettings.cookieExpiry >= 0) {\n          const date: Date = new Date();\n\n          date.setTime(date.getTime() + this.translateCacheSettings.cookieExpiry * 3600000);\n          cookieString += `;expires=${date.toUTCString()}`;\n        }\n\n        if (this.translateCacheSettings.cookieAttributes) {\n          cookieString += ';' + this.translateCacheSettings.cookieAttributes;\n        }\n\n        document.cookie = cookieString;\n\n        return;\n      }\n      const regexp = new RegExp('(?:^' + name + '|;\\\\s*' + name + ')=(.*?)(?:;|$)', 'g');\n      const result = regexp.exec(document.cookie);\n\n      return decodeURIComponent(result[1]);\n    } catch (e) { return; }\n  }\n}\n"]}