feat(core): implement translation

src/app/app.config.ts

@@ -1,4 +1,4 @@
-import { ApplicationConfig, LOCALE_ID, provideBrowserGlobalErrorListeners, provideZoneChangeDetection } from '@angular/core';
+import { ApplicationConfig, LOCALE_ID, provideAppInitializer, provideBrowserGlobalErrorListeners, provideZoneChangeDetection } from '@angular/core';
 import { provideRouter, withComponentInputBinding } from '@angular/router';
 
 import { providePrimeNG } from 'primeng/config';
@@ -6,9 +6,14 @@ import { Theme } from '../../public/theme/theme';
 
 import { routes } from './app.routes';
 import { registerLocaleData } from '@angular/common';
-import localeDeAt from '@angular/common/locales/de-AT';
+import localeDeAt from '@angular/common/locales/de';
 import { germanTranslation } from './core/config/translations';
 
+import {provideTranslateService} from "@ngx-translate/core";
+import {provideTranslateHttpLoader} from "@ngx-translate/http-loader";
+import { provideHttpClient } from '@angular/common/http';
+import { initializeTranslations } from './core/config/translation-init';
+
 registerLocaleData(localeDeAt);
 
 export const appConfig: ApplicationConfig = {
@@ -16,6 +21,7 @@ export const appConfig: ApplicationConfig = {
     provideBrowserGlobalErrorListeners(),
     provideZoneChangeDetection({ eventCoalescing: true }),
     provideRouter(routes, withComponentInputBinding()),
+    provideHttpClient(),
     { provide: LOCALE_ID, useValue: 'de-AT' },
     providePrimeNG({
       theme: {
@@ -31,5 +37,12 @@ export const appConfig: ApplicationConfig = {
       },
       translation: germanTranslation, // TODO: dynamic - selected language
     }),
+    provideTranslateService({
+      loader: provideTranslateHttpLoader({
+        prefix: 'i18n/',
+        suffix: '.json'
+      }),
+    }),
+    provideAppInitializer(initializeTranslations),
   ],
 };

src/app/app.ts

@@ -1,4 +1,4 @@
-import { Component } from '@angular/core';
+import { Component, inject } from '@angular/core';
 import { RouterOutlet } from '@angular/router';
 import { ThemeSwitchService } from './core/service/theme-switch.service';
 import { Background } from "./core/components/background/background";
@@ -11,7 +11,9 @@ import { NavigationBar } from "./core/components/navigation-bar/navigation-bar";
 })
 export class App {
 
-  constructor(private themeSwitchService: ThemeSwitchService) {
+  private themeSwitchService = inject(ThemeSwitchService);
+
+  constructor() {
     this.themeSwitchService.initialize();
   }
 

src/app/core/components/background/background.ts

@@ -1,4 +1,4 @@
-import { Component, ElementRef, HostListener, ViewChild } from '@angular/core';
+import { Component, ElementRef, HostListener, inject, ViewChild } from '@angular/core';
 import { ThemeSwitchService } from '../../service/theme-switch.service';
 
 @Component({
@@ -9,9 +9,9 @@ import { ThemeSwitchService } from '../../service/theme-switch.service';
 })
 export class Background {
 
-  constructor(
-    private themeSwitchService: ThemeSwitchService,
-  ) {}
+  private themeSwitchService = inject(ThemeSwitchService);
+
+  constructor() {}
 
   @ViewChild('canvas', { static: true }) canvasRef!: ElementRef<HTMLCanvasElement>;
 

src/app/core/components/navigation-bar/navigation-bar.html

@@ -7,10 +7,10 @@
             <ul>
                 <li class="relative list-none flex flex-row gap-3">
                     <a routerLink="/" routerLinkActive="active" [routerLinkActiveOptions]="{ exact: true }">
-                        Home
+                        {{ 'common.home' | translate }}
                     </a>
                     <a routerLink="/about" routerLinkActive="active">
-                        About
+                        {{ 'common.about' | translate }}
                     </a>
                 </li>
             </ul>
@@ -26,7 +26,9 @@
                 <fa-icon [icon]="faSun"/>
             </div>
         }
-        <div class="language size-[50px]">EN</div>
+        <div class="language size-[50px]" (click)="toggleLanguage()">
+            {{ translateService.getCurrentLang().toUpperCase() }}
+        </div>
     </div>
 </nav>
 

src/app/core/components/navigation-bar/navigation-bar.ts

@@ -1,28 +1,34 @@
-import { Component } from '@angular/core';
+import { Component, inject } from '@angular/core';
 import { Router, RouterLink, RouterLinkActive } from '@angular/router';
 import { FontAwesomeModule } from '@fortawesome/angular-fontawesome';
 import { faMoon } from '@fortawesome/free-solid-svg-icons';
 import { faSun } from '@fortawesome/free-solid-svg-icons';
 import { ThemeSwitchService } from '../../service/theme-switch.service';
 import { Card } from 'primeng/card';
+import { TranslatePipe, TranslateService } from '@ngx-translate/core';
 
 @Component({
   selector: 'app-navigation-bar',
-  imports: [FontAwesomeModule, RouterLink, RouterLinkActive, Card ],
+  imports: [FontAwesomeModule, RouterLink, RouterLinkActive, Card, TranslatePipe],
   templateUrl: './navigation-bar.html',
   styleUrl: './navigation-bar.scss'
 })
 export class NavigationBar {
 
-  constructor(
-    private router: Router,
-    protected themeSwitchService: ThemeSwitchService,
-  ) {}
+  private router = inject(Router);
+  protected themeSwitchService = inject(ThemeSwitchService);
+  protected translateService = inject(TranslateService);
+
+  constructor() {}
 
   isActive(route: string): boolean {
     return this.router.url === route;
   }
 
+  toggleLanguage(): void {
+    this.translateService.use(this.translateService.getCurrentLang() === 'de' ? 'en' : 'de');
+  }
+
   faMoon = faMoon;
   faSun = faSun;
 

src/app/core/config/translation-init.ts

@@ -0,0 +1,22 @@
+import { inject } from '@angular/core';
+import { TranslateService } from '@ngx-translate/core';
+
+export function initializeTranslations() {
+    const translate = inject(TranslateService);
+
+    const availableLangs = ['de', 'at', 'en'];
+    translate.addLangs(availableLangs);
+
+    const defaultLang = 'de';
+    let langToUse = translate.getBrowserLang() ?? defaultLang;
+    langToUse = availableLangs.includes(langToUse) ? langToUse : defaultLang;
+
+    translate.setFallbackLang(defaultLang);
+    translate.use(langToUse);
+
+    document.documentElement.lang = langToUse;
+    
+    translate.onLangChange.subscribe((event) => {
+      document.documentElement.lang = event.lang;
+    });
+}

src/app/core/config/translations.ts

@@ -69,7 +69,6 @@ export const germanTranslation: Translation = {
   emptySelectionMessage: 'Kein Element ausgewählt',
   emptySearchMessage: 'Keine Ergebnisse gefunden',
   emptyMessage: 'Keine Optionen verfügbar',
-
   aria: {
     trueLabel: 'Wahr',
     falseLabel: 'Falsch',
@@ -121,3 +120,132 @@ export const germanTranslation: Translation = {
     rotateLeft: 'Nach links drehen'
   }
 };
+
+export const austrianTranslation: Translation = {
+  ...germanTranslation,
+  monthNames: [
+    'Jänner','Februar','März','April','Mai','Juni',
+    'Juli','August','September','Oktober','November','Dezember'
+  ],
+};
+
+export const englishTranslation: Translation = {
+  startsWith: 'Starts with',
+  contains: 'Contains',
+  notContains: 'Does not contain',
+  endsWith: 'Ends with',
+  equals: 'Equals',
+  notEquals: 'Not equals',
+  noFilter: 'No Filter',
+  lt: 'Less than',
+  lte: 'Less than or equal to',
+  gt: 'Greater than',
+  gte: 'Greater than or equal to',
+  dateIs: 'Date is',
+  dateIsNot: 'Date is not',
+  dateBefore: 'Date is before',
+  dateAfter: 'Date is after',
+  clear: 'Clear',
+  apply: 'Apply',
+  matchAll: 'Match All',
+  matchAny: 'Match Any',
+  addRule: 'Add Rule',
+  removeRule: 'Remove Rule',
+  accept: 'Yes',
+  reject: 'No',
+  choose: 'Choose',
+  upload: 'Upload',
+  cancel: 'Cancel',
+  completed: 'Completed',
+  pending: 'Pending',
+  fileSizeTypes: ['B', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'],
+  dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
+  dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
+  dayNamesMin: ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa'],
+  monthNames: [
+    'January','February','March','April','May','June',
+    'July','August','September','October','November','December'
+  ],
+  monthNamesShort: ['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'],
+  chooseYear: 'Choose Year',
+  chooseMonth: 'Choose Month',
+  chooseDate: 'Choose Date',
+  prevDecade: 'Previous Decade',
+  nextDecade: 'Next Decade',
+  prevYear: 'Previous Year',
+  nextYear: 'Next Year',
+  prevMonth: 'Previous Month',
+  nextMonth: 'Next Month',
+  prevHour: 'Previous Hour',
+  nextHour: 'Next Hour',
+  prevMinute: 'Previous Minute',
+  nextMinute: 'Next Minute',
+  prevSecond: 'Previous Second',
+  nextSecond: 'Next Second',
+  am: 'AM',
+  pm: 'PM',
+  today: 'Today',
+  weekHeader: 'Wk',
+  firstDayOfWeek: 0,
+  dateFormat: 'mm/dd/yy',
+  weak: 'Weak',
+  medium: 'Medium',
+  strong: 'Strong',
+  passwordPrompt: 'Enter a password',
+  emptyFilterMessage: 'No results found',
+  searchMessage: '{0} results available',
+  selectionMessage: '{0} items selected',
+  emptySelectionMessage: 'No item selected',
+  emptySearchMessage: 'No results found',
+  emptyMessage: 'No options available',
+  aria: {
+    trueLabel: 'True',
+    falseLabel: 'False',
+    nullLabel: 'Not selected',
+    star: '1 Star',
+    stars: '{star} Stars',
+    selectAll: 'Select all items',
+    unselectAll: 'Unselect all items',
+    close: 'Close',
+    previous: 'Previous',
+    next: 'Next',
+    navigation: 'Navigation',
+    scrollTop: 'Scroll to top',
+    moveTop: 'Move to top',
+    moveUp: 'Move up',
+    moveDown: 'Move down',
+    moveBottom: 'Move to bottom',
+    moveToTarget: 'Move to target',
+    moveToSource: 'Move to source',
+    moveAllToTarget: 'Move all to target',
+    moveAllToSource: 'Move all to source',
+    pageLabel: '{page}',
+    firstPageLabel: 'First Page',
+    lastPageLabel: 'Last Page',
+    nextPageLabel: 'Next Page',
+    prevPageLabel: 'Previous Page',
+    rowsPerPageLabel: 'Rows per page',
+    jumpToPageDropdownLabel: 'Select page',
+    jumpToPageInputLabel: 'Enter page',
+    selectRow: 'Row selected',
+    unselectRow: 'Row unselected',
+    expandRow: 'Row expanded',
+    collapseRow: 'Row collapsed',
+    showFilterMenu: 'Show filter menu',
+    hideFilterMenu: 'Hide filter menu',
+    filterOperator: 'Filter operator',
+    filterConstraint: 'Filter constraint',
+    editRow: 'Edit row',
+    saveEdit: 'Save edit',
+    cancelEdit: 'Cancel edit',
+    listView: 'List view',
+    gridView: 'Grid view',
+    slide: 'Slide',
+    slideNumber: '{slideNumber}',
+    zoomImage: 'Zoom image',
+    zoomIn: 'Zoom in',
+    zoomOut: 'Zoom out',
+    rotateRight: 'Rotate right',
+    rotateLeft: 'Rotate left'
+  }
+};