Make translation-service available for all shared-pages/components

src/app/components/shared/comment-list/comment-list.component.ts

@@ -8,6 +8,8 @@ import { NotificationService } from '../../../services/util/notification.service
 import { AuthenticationService } from '../../../services/http/authentication.service';
 import { UserRole } from '../../../models/user-roles.enum';
 import { User } from '../../../models/user';
+import {TranslateService} from "@ngx-translate/core";
+import {LanguageService} from "../LanguageService";
 
 @Component({
   selector: 'app-comment-list',
@@ -28,7 +30,10 @@ export class CommentListComponent implements OnInit {
               private roomService: RoomService,
               private location: Location,
               private commentService: CommentService,
-              private notification: NotificationService) {
+              private notification: NotificationService,
+              private translateService: TranslateService,
+              protected langService: LanguageService) {
+    langService.langEmitter.subscribe(lang => translateService.use(lang));
   }
 
   ngOnInit() {
@@ -37,6 +42,7 @@ export class CommentListComponent implements OnInit {
     this.roomShortId = this.route.snapshot.paramMap.get('roomId');
     this.roomId = localStorage.getItem(`roomId`);
     this.getComments();
+    this.translateService.use(sessionStorage.getItem('currentLang'));
   }
 
   getComments(): void {

src/app/components/shared/content-list/content-list.component.ts

@@ -13,6 +13,8 @@ import { ContentTextCreatorComponent } from '../../creator/content-text-creator/
 import { NotificationService } from '../../../services/util/notification.service';
 import { Room } from '../../../models/room';
 import { RoomService } from '../../../services/http/room.service';
+import {TranslateService} from "@ngx-translate/core";
+import {LanguageService} from "../LanguageService";
 
 class ContentGroup {
   name: string;
@@ -51,7 +53,10 @@ export class ContentListComponent implements OnInit {
               private roomService: RoomService,
               private route: ActivatedRoute,
               private notificationService: NotificationService,
-              public dialog: MatDialog) {
+              public dialog: MatDialog,
+              private translateService: TranslateService,
+              protected langService: LanguageService) {
+    langService.langEmitter.subscribe(lang => translateService.use(lang));
   }
 
   ngOnInit() {
@@ -66,6 +71,7 @@ export class ContentListComponent implements OnInit {
     this.route.params.subscribe(params => {
       sessionStorage.setItem('collection', params['contentGroup']);
     });
+    this.translateService.use(sessionStorage.getItem('currentLang'));
   }
 
   findIndexOfSubject(subject: string): number {

src/app/components/shared/feedback-barometer-page/feedback-barometer-page.component.ts

@@ -3,6 +3,8 @@ import { AuthenticationService } from '../../../services/http/authentication.ser
 import { UserRole } from '../../../models/user-roles.enum';
 import { NotificationService } from '../../../services/util/notification.service';
 
+/* ToDo: Use TranslateService */
+
 @Component({
   selector: 'app-feedback-barometer-page',
   templateUrl: './feedback-barometer-page.component.html',

src/app/components/shared/statistics/statistics.component.ts

@@ -8,6 +8,8 @@ import { AnswerText } from '../../../models/answer-text';
 import { AnswerChoice } from '../../../models/answer-choice';
 import { ContentType } from '../../../models/content-type.enum';
 
+/* TODO: Use TranslateService */
+
 @Component({
   selector: 'app-statistics',
   templateUrl: './statistics.component.html',