import { HttpClient } from '@angular/common/http';
import { BehaviorSubject, Observable, Subject } from 'rxjs';
import { Router } from '@angular/router';
import { ConfService } from './conf.service';
import { Locale } from '../classes/locale';
import { CustomThemeService } from './custom-theme.service';
import * as i0 from "@angular/core";
export declare class LanguageService {
    protected http: HttpClient;
    protected _router: Router;
    protected confService: ConfService;
    protected _customTheme: CustomThemeService;
    lastLocale: string;
    localeChange: Subject<unknown>;
    defaultLocale: string;
    defaultLocales: {
        en: string;
        ar: string;
    };
    protected availableLocales: BehaviorSubject<Locale[]>;
    protected language: BehaviorSubject<object>;
    constructor(http: HttpClient, _router: Router, confService: ConfService, _customTheme: CustomThemeService);
    setLocale(locale: string): void;
    getLanguage(): Observable<Object>;
    readUrl(): void;
    getAvailableLocales(): Observable<Locale[]>;
    is_available(locale: any): Observable<boolean>;
    protected getLocalesFromApi(): void;
    protected getAvailableLocalesFromApi(): void;
    /**
   * Returns void
   * @param langCode languageCode return from getAvailableLocales
   *
   * @returns void
   *
   * @method
   * check if the languageCode is en_US so lang attribute in document will be lang="en"
   * check if the languageCode is ar_EG so lang attribute in document will be lang="ar"
   * lang attribute in the HTML will be lang="ar"
   * */
    protected changeLangAttrBasedOnLanguage(langCode: string): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<LanguageService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<LanguageService>;
}