Added LocaleService as localization handler

src/app/app.component.ts

@@ -1,33 +1,36 @@
 import { delay, filter, map, take } from 'rxjs/operators';
-import { AfterViewInit, ChangeDetectionStrategy, Component, HostListener, Inject, OnInit, ViewEncapsulation } from '@angular/core';
+import {
+  AfterViewInit,
+  ChangeDetectionStrategy,
+  Component,
+  HostListener,
+  Inject,
+  OnInit,
+  ViewEncapsulation
+} from '@angular/core';
 import { NavigationCancel, NavigationEnd, NavigationStart, Router } from '@angular/router';
 
+import { BehaviorSubject, combineLatest as combineLatestObservable, Observable, of } from 'rxjs';
 import { select, Store } from '@ngrx/store';
-
 import { TranslateService } from '@ngx-translate/core';
+import { Angulartics2GoogleAnalytics } from 'angulartics2/ga';
 
 import { GLOBAL_CONFIG, GlobalConfig } from '../config';
-
 import { MetadataService } from './core/metadata/metadata.service';
 import { HostWindowResizeAction } from './shared/host-window.actions';
 import { HostWindowState } from './shared/search/host-window.reducer';
 import { NativeWindowRef, NativeWindowService } from './core/services/window.service';
 import { isAuthenticated } from './core/auth/selectors';
 import { AuthService } from './core/auth/auth.service';
-import { Angulartics2GoogleAnalytics } from 'angulartics2/ga';
 import variables from '../styles/_exposed_variables.scss';
 import { CSSVariableService } from './shared/sass-helper/sass-helper.service';
 import { MenuService } from './shared/menu/menu.service';
 import { MenuID } from './shared/menu/initial-menus-state';
-import { BehaviorSubject, combineLatest as combineLatestObservable, Observable, of } from 'rxjs';
 import { slideSidebarPadding } from './shared/animations/slide';
 import { HostWindowService } from './shared/host-window.service';
 import { Theme } from '../config/theme.inferface';
-import { isNotEmpty } from './shared/empty.util';
-import { CookieService } from './core/services/cookie.service';
 import { Angulartics2DSpace } from './statistics/angulartics/dspace-provider';
-
-export const LANG_COOKIE = 'language_cookie';
+import { LocaleService } from './core/locale/locale.service';
 
 @Component({
   selector: 'ds-app',
@@ -58,29 +61,16 @@ export class AppComponent implements OnInit, AfterViewInit {
     private cssService: CSSVariableService,
     private menuService: MenuService,
     private windowService: HostWindowService,
-    private cookie: CookieService
+    private localeService: LocaleService
   ) {
     // Load all the languages that are defined as active from the config file
     translate.addLangs(config.languages.filter((LangConfig) => LangConfig.active === true).map((a) => a.code));
 
     // Load the default language from the config file
-    translate.setDefaultLang(config.defaultLanguage);
+    // translate.setDefaultLang(config.defaultLanguage);
 
-    // Attempt to get the language from a cookie
-    const lang = cookie.get(LANG_COOKIE);
-    if (isNotEmpty(lang)) {
-      // Cookie found
-      // Use the language from the cookie
-      translate.use(lang);
-    } else {
-      // Cookie not found
-      // Attempt to get the browser language from the user
-      if (translate.getLangs().includes(translate.getBrowserLang())) {
-        translate.use(translate.getBrowserLang());
-      } else {
-        translate.use(config.defaultLanguage);
-      }
-    }
+    // set the current language code
+    this.localeService.setCurrentLanguageCode();
 
     angulartics2GoogleAnalytics.startTracking();
     angulartics2DSpace.startTracking();
@@ -130,15 +120,15 @@ export class AppComponent implements OnInit, AfterViewInit {
       // More information on this bug-fix: https://blog.angular-university.io/angular-debugging/
       delay(0)
     ).subscribe((event) => {
-        if (event instanceof NavigationStart) {
-          this.isLoading$.next(true);
-        } else if (
-          event instanceof NavigationEnd ||
-          event instanceof NavigationCancel
-        ) {
-          this.isLoading$.next(false);
-        }
-      });
+      if (event instanceof NavigationStart) {
+        this.isLoading$.next(true);
+      } else if (
+        event instanceof NavigationEnd ||
+        event instanceof NavigationCancel
+      ) {
+        this.isLoading$.next(false);
+      }
+    });
   }
 
   @HostListener('window:resize', ['$event'])