feat: add optional email and phone fields to hotel model

angular.json

@@ -16,9 +16,7 @@
             "outputPath": "dist/hotel-manager",
             "index": "src/index.html",
             "browser": "src/main.ts",
-            "polyfills": [
-              "zone.js"
-            ],
+            "polyfills": ["zone.js"],
             "tsConfig": "tsconfig.app.json",
             "assets": [
               {
@@ -27,10 +25,7 @@
               },
               "src/assets"
             ],
-            "styles": [
-              "@angular/material/prebuilt-themes/azure-blue.css",
-              "src/styles.css"
-            ],
+            "styles": ["src/styles.css"],
             "scripts": []
           },
           "configurations": {
@@ -75,10 +70,7 @@
         "test": {
           "builder": "@angular-devkit/build-angular:karma",
           "options": {
-            "polyfills": [
-              "zone.js",
-              "zone.js/testing"
-            ],
+            "polyfills": ["zone.js", "zone.js/testing"],
             "tsConfig": "tsconfig.spec.json",
             "assets": [
               {
@@ -86,10 +78,7 @@
                 "input": "public"
               }
             ],
-            "styles": [
-              "@angular/material/prebuilt-themes/azure-blue.css",
-              "src/styles.css"
-            ],
+            "styles": ["src/styles.css"],
             "scripts": []
           }
         }

package.json

@@ -10,25 +10,23 @@
   },
   "private": true,
   "dependencies": {
-    "@angular/animations": "^18.2.3",
-    "@angular/cdk": "^18.2.3",
-    "@angular/common": "^18.2.3",
-    "@angular/compiler": "^18.2.3",
-    "@angular/core": "^18.2.3",
-    "@angular/forms": "^18.2.3",
-    "@angular/material": "^18.2.3",
-    "@angular/platform-browser": "^18.2.3",
-    "@angular/platform-browser-dynamic": "^18.2.3",
-    "@angular/router": "^18.2.3",
+    "@angular/animations": "^19.0.0",
+    "@angular/common": "^19.0.0",
+    "@angular/compiler": "^19.0.0",
+    "@angular/core": "^19.0.0",
+    "@angular/forms": "^19.0.0",
+    "@angular/platform-browser": "^19.0.0",
+    "@angular/platform-browser-dynamic": "^19.0.0",
+    "@angular/router": "^19.0.0",
     "angular-in-memory-web-api": "^0.18.0",
     "rxjs": "~7.8.0",
     "tslib": "^2.3.0",
-    "zone.js": "~0.14.3"
+    "zone.js": "~0.15.0"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "^18.2.3",
-    "@angular/cli": "^18.2.3",
-    "@angular/compiler-cli": "^18.2.3",
+    "@angular-devkit/build-angular": "^19.0.2",
+    "@angular/cli": "^19.0.2",
+    "@angular/compiler-cli": "^19.0.0",
     "@types/jasmine": "~5.1.0",
     "autoprefixer": "^10.4.20",
     "jasmine-core": "~5.1.0",
@@ -41,4 +39,4 @@
     "tailwindcss": "^3.4.10",
     "typescript": "~5.5.2"
   }
-}
+}

renovate.json

@@ -1,6 +1,4 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
-  "extends": [
-    "local>Renovate/renovate-config"
-  ]
+  "extends": ["local>Renovate/renovate-config"]
 }

src/app/Button/button.component.html

@@ -0,0 +1,6 @@
+<button
+  type="button"
+  class="px-6 py-2 bg-blue-500 text-white font-semibold rounded-lg shadow-md hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-400 focus:ring-opacity-75"
+>
+  {{ text }}
+</button>

src/app/Button/button.component.ts

@@ -0,0 +1,10 @@
+import { Component } from '@angular/core';
+
+@Component({
+  selector: 'app-button',
+  standalone: true,
+  templateUrl: './button.component.html',
+})
+export class ButtonComponent {
+  public text = 'Test';
+}

src/app/Child/child.component.html

@@ -0,0 +1,12 @@
+<h1 class="text-2xl font-bold mb-4">Child</h1>
+<p class="text-lg mb-2">Balance: {{ balance }}</p>
+<p [class.hidden]="!isBroke" class="text-red-500 mb-4">
+  I'm broke. Now I'm about as poor as Jan-Marlon.
+</p>
+<button
+  type="button"
+  (click)="takeMoney()"
+  class="px-6 py-2 bg-blue-500 text-white font-semibold rounded-lg shadow-md hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-400 focus:ring-opacity-75"
+>
+  Take Money
+</button>

src/app/Child/child.component.ts

@@ -0,0 +1,25 @@
+import { Component, Input, Output, EventEmitter } from '@angular/core';
+
+@Component({
+  selector: 'app-child',
+  standalone: true,
+  templateUrl: './child.component.html',
+})
+export class ChildComponent {
+  @Input() public balance: number = 0;
+  @Output() balanceChange = new EventEmitter<number>();
+
+  public isBroke = false;
+
+  public takeMoney() {
+    if (this.balance <= 0) {
+      this.isBroke = true;
+    } else {
+      this.balance -= 50;
+      if (this.balance == 0) {
+        this.isBroke = true;
+      }
+      this.balanceChange.emit(this.balance);
+    }
+  }
+}

src/app/HotelItem/HotelItem.component.html

@@ -0,0 +1,37 @@
+<p class="text-2xl font-bold text-gray-800 mb-2">Name: {{ hotel.hotelName }}</p>
+<p class="text-base text-gray-600 mb-4">Description: {{ hotel.description }}</p>
+<p class="text-lg font-medium text-green-600 mb-4">
+  Price:
+  {{
+    hotel.price
+      | currency
+        : getCurrencyCode(selectedLanguage)
+        : "symbol"
+        : "2.2-2"
+        : selectedLanguage
+  }}
+</p>
+<select
+  [ngModel]="selectedLanguage"
+  (ngModelChange)="languageChange($event)"
+  class="input-field block w-full p-2 border border-gray-300 rounded-md mb-4 focus:border-blue-500 focus:ring focus:ring-blue-200"
+>
+  <option
+    *ngFor="let lang of langs"
+    [value]="lang.code"
+    [selected]="lang.lang == 'de'"
+  >
+    {{ lang.lang }}
+  </option>
+</select>
+<img
+  src="{{ hotel.imageUrl }}"
+  alt="Hotel"
+  class="w-full rounded-full h-auto animate-shake shadow-lg mb-4"
+/>
+<a
+  *ngIf="!isDetail"
+  routerLink="/hotels/{{ hotel.id }}"
+  class="submit-button text-blue-600 hover:text-blue-800 hover:underline mb-4 block"
+  >Details</a
+>

src/app/HotelItem/HotelItem.component.ts

@@ -0,0 +1,63 @@
+import { Component, Injectable, Input } from '@angular/core';
+import { ChildComponent } from '../Child/child.component';
+import { Hotel } from './hotel';
+import { CurrencyPipe, NgFor, NgIf } from '@angular/common';
+import { FormsModule } from '@angular/forms';
+import { StarRatingComponent } from '../star-rating/star-rating.component';
+import { HttpClient } from '@angular/common/http';
+import { RouterLink } from '@angular/router';
+
+@Component({
+  selector: 'app-hotel-item',
+  standalone: true,
+  templateUrl: './HotelItem.component.html',
+  imports: [
+    ChildComponent,
+    CurrencyPipe,
+    FormsModule,
+    StarRatingComponent,
+    NgIf,
+    RouterLink,
+    NgFor,
+  ],
+})
+export class HotelItem {
+  @Input() public hotel!: Hotel;
+  public selectedLanguage?: string;
+
+  @Input() public isDetail: boolean = false;
+
+  public languageChange(lang: string) {
+    this.selectedLanguage = lang;
+    console.log(this.selectedLanguage);
+  }
+
+  public getCurrencyCode(langCode: string | undefined): string {
+    if (!langCode) return '';
+
+    for (let language of this.langs) {
+      if (language.code === langCode) {
+        return language.currency;
+      }
+    }
+    return '';
+  }
+
+  public langs = [
+    {
+      lang: 'en',
+      code: 'en-US',
+      currency: 'USD',
+    },
+    {
+      lang: 'cn',
+      code: 'cn-CN',
+      currency: 'CNY',
+    },
+    {
+      lang: 'de',
+      code: 'de-DE',
+      currency: 'EUR',
+    },
+  ];
+}

src/app/HotelItem/hotel.ts

@@ -6,4 +6,6 @@ export interface Hotel {
   imageUrl: string;
   rating: number;
   tags: Array<string>;
+  email?: string;
+  phone?: string;
 }

src/app/Parent/parent.component.html

@@ -0,0 +1,8 @@
+<div class="m-3">
+  <h1>Parent</h1>
+  <p>Kontostand: {{ balance }}</p>
+  <button type="button" class="button" (click)="addFifty()">Add Money</button>
+
+  <app-child [(balance)]="balance"></app-child>
+  <app-child [(balance)]="balance"></app-child>
+</div>

src/app/Parent/parent.component.ts

@@ -0,0 +1,16 @@
+import { Component } from '@angular/core';
+import { ChildComponent } from '../Child/child.component';
+
+@Component({
+  selector: 'app-parent',
+  standalone: true,
+  templateUrl: './parent.component.html',
+  imports: [ChildComponent],
+})
+export class ParentComponent {
+  public balance = 1000;
+
+  public addFifty() {
+    this.balance += 50;
+  }
+}

src/app/Parent/services/hotel.service.ts

@@ -0,0 +1,47 @@
+import { Injectable } from '@angular/core';
+import { Hotel } from '../../HotelItem/hotel';
+import { from, Observable } from 'rxjs';
+
+@Injectable()
+export class HotelService {
+  public getHotels(): Observable<Hotel> {
+    return from([
+      {
+        id: 1,
+        hotelName: 'Buea süßes Leben',
+        description: 'Schöne Aussicht am Meer',
+        price: 230.5,
+        imageUrl: 'assets/img/1.jpg',
+        rating: 3.5,
+        tags: ['test'],
+      },
+      {
+        id: 2,
+        hotelName: 'Marrakesch',
+        description: 'Genießen Sie den Blick auf die Berge',
+        price: 145.5,
+        imageUrl: 'assets/img/2.jpg',
+        rating: 5,
+        tags: ['test'],
+      },
+      {
+        id: 3,
+        hotelName: 'Abuja neuer Palast',
+        description: 'Kompletter Aufenthalt mit Autoservice',
+        price: 120.12,
+        imageUrl: 'assets/img/3.jpg',
+        rating: 4,
+        tags: ['test'],
+      },
+      {
+        id: 4,
+        hotelName: 'Kapstadt Stadt',
+        description: 'Wunderschönes Ambiente für Ihren Aufenthalt',
+        price: 135.12,
+        imageUrl: 'assets/img/4.jpg',
+        rating: 2.5,
+        tags: ['test'],
+      },
+    ]);
+  }
+}

src/app/Search/search.component.html

@@ -1,2 +1,6 @@
-<label for="search">Search</label>
-<input [(ngModel)]="input" (ngModelChange)="update($event)" id="search" class="border border-gray-300 rounded-md p-2 w-full focus:border-blue-500 focus:ring focus:ring-blue-200" type="search">
+<input
+  [(ngModel)]="input"
+  (ngModelChange)="update($event)"
+  class="border border-gray-300 rounded-md p-2 w-full focus:border-blue-500 focus:ring focus:ring-blue-200"
+  type="search"
+/>

src/app/Search/search.component.ts

@@ -1,6 +1,8 @@
-import { Component, Input, Output } from "@angular/core";
-import { FormsModule } from "@angular/forms";
-import { EventEmitter } from "@angular/core";
+import { CommonModule } from '@angular/common';
+import { Component, NgModule } from '@angular/core';
+import { FormsModule, NgForm, NgModel } from '@angular/forms';
+import { Input, Output } from '@angular/core';
+import { EventEmitter } from '@angular/core';
 
 @Component({
   selector: 'app-search',
@@ -9,7 +11,7 @@ import { EventEmitter } from "@angular/core";
   imports: [FormsModule],
 })
 export class SearchComponent {
-  @Input() public input: string = "";
+  @Input() public input: string = '';
   @Output() inputChange = new EventEmitter<string>();
 
   public update(e: string) {

src/app/api/api.ts

@@ -1,6 +1,6 @@
 import { InMemoryDbService } from 'angular-in-memory-web-api';
 
-import { Hotel } from '../hotel-item/hotel';
+import { Hotel } from '../HotelItem/hotel';
 
 /**
  * Initial data for in memory web api
@@ -10,7 +10,6 @@ import { Hotel } from '../hotel-item/hotel';
  * @implements {InMemoryDbService}
  */
 export class HotelData implements InMemoryDbService {
-
   createDb(): Record<string, Hotel[]> {
     const hotels: Hotel[] = [
       {
@@ -20,39 +19,43 @@ export class HotelData implements InMemoryDbService {
         price: 230.5,
         imageUrl: 'assets/img/1.jpg',
         rating: 3.5,
-        tags: ['nouveau']
-      }, {
+        tags: ['nouveau'],
+      },
+      {
         id: 2,
         hotelName: 'Marakech',
         description: 'Profitez de la vue sur les montagnes',
         price: 145.5,
         imageUrl: 'assets/img/2.jpg',
         rating: 5,
-        tags: ['nouveau']
-      }, {
+        tags: ['nouveau'],
+      },
+      {
         id: 3,
         hotelName: 'Abudja new look palace',
         description: 'Séjour complet avec service de voitures',
         price: 120.12,
         imageUrl: 'assets/img/3.jpg',
         rating: 4,
-        tags: ['nouveau']
-      }, {
+        tags: ['nouveau'],
+      },
+      {
         id: 4,
         hotelName: 'Cape town city',
         description: 'Magnifique cadre pour votre séjour',
         price: 135.12,
         imageUrl: 'assets/img/4.jpg',
         rating: 2.5,
-        tags: ['nouveau']
-      }
+        tags: ['nouveau'],
+      },
     ];
 
     return { hotels };
   }
 
   genId(hotels: Hotel[]): number {
-    return hotels.length > 0 ? Math.max(...hotels.map(hotel => hotel.id)) + 1 : 1;
+    return hotels.length > 0
+      ? Math.max(...hotels.map((hotel) => hotel.id)) + 1
+      : 1;
   }
 }
-

src/app/app.component.html

@@ -1 +1,5 @@
-<router-outlet></router-outlet>
+<router-outlet></router-outlet>
+<!-- <p>ID: {{response.id}}</p> -->
+<!-- <p>userId: {{response.userId}}</p> -->
+<!-- <p>title: {{response.title}}</p> -->
+<!-- <p>completed: {{response.completed}}</p> -->

src/app/app.component.spec.ts

@@ -24,6 +24,8 @@ describe('AppComponent', () => {
     const fixture = TestBed.createComponent(AppComponent);
     fixture.detectChanges();
     const compiled = fixture.nativeElement as HTMLElement;
-    expect(compiled.querySelector('h1')?.textContent).toContain('Hello, hotel-manager');
+    expect(compiled.querySelector('h1')?.textContent).toContain(
+      'Hello, hotel-manager',
+    );
   });
 });

src/app/app.component.ts

@@ -1,16 +1,38 @@
 import { Component, Injectable } from '@angular/core';
-import { HotelService } from './service/hotel.service';
+import { HotelItem } from './HotelItem/HotelItem.component';
+import { SearchComponent } from './Search/search.component';
+import {
+  AsyncPipe,
+  NgFor,
+  NgForOf,
+  NgIf,
+  UpperCasePipe,
+} from '@angular/common';
+import { TextPipe } from '../text.pipe';
+import { HotelService } from './Parent/services/hotel.service';
+import { inject } from '@angular/core';
+import { filter, from, last, map, Observable, scan } from 'rxjs';
+import { HttpClient } from '@angular/common/http';
+import { Hotel } from './HotelItem/hotel';
 import { RouterOutlet } from '@angular/router';
 
-@Injectable({providedIn: "root"})
+@Injectable({ providedIn: 'root' })
 @Component({
   selector: 'app-root',
   standalone: true,
-  imports: [RouterOutlet],
+  imports: [
+    RouterOutlet,
+    NgFor,
+    NgForOf,
+    NgIf,
+    HotelItem,
+    SearchComponent,
+    UpperCasePipe,
+    TextPipe,
+    AsyncPipe,
+  ],
   templateUrl: './app.component.html',
   providers: [HotelService],
-  styleUrl: './app.component.css'
+  styleUrl: './app.component.css',
 })
-export class AppComponent {
-}
-
+export class AppComponent {}

src/app/app.config.ts

@@ -1,4 +1,8 @@
-import { ApplicationConfig, importProvidersFrom, provideZoneChangeDetection } from '@angular/core';
+import {
+  ApplicationConfig,
+  importProvidersFrom,
+  provideZoneChangeDetection,
+} from '@angular/core';
 import { provideRouter } from '@angular/router';
 import localeDe from '@angular/common/locales/de';
 import localeCn from '@angular/common/locales/zh-Hans';
@@ -8,7 +12,6 @@ import { registerLocaleData } from '@angular/common';
 import { provideHttpClient } from '@angular/common/http';
 import { InMemoryWebApiModule } from 'angular-in-memory-web-api';
 import { HotelData } from './api/api';
-import { provideAnimationsAsync } from '@angular/platform-browser/animations/async';
 
 registerLocaleData(localeDe, 'de-DE');
 registerLocaleData(localeCn, 'cn-CN');
@@ -17,5 +20,6 @@ export const appConfig: ApplicationConfig = {
     provideZoneChangeDetection({ eventCoalescing: true }),
     provideRouter(routes),
     provideHttpClient(),
-    importProvidersFrom(InMemoryWebApiModule.forRoot(HotelData)), provideAnimationsAsync()]
+    importProvidersFrom(InMemoryWebApiModule.forRoot(HotelData)),
+  ],
 };

src/app/app.routes.ts

@@ -1,27 +1,24 @@
 import { Routes } from '@angular/router';
 import { HotelDetailsComponent } from './hotel-details/hotel-details.component';
 import { HotelListComponent } from './hotel-list/hotel-list.component';
-import { HotelFormComponent } from './hotel-form/hotel-form.component';
-import { formGuard } from './form.guard';
-import { NotFoundComponent } from './not-found/not-found.component';
+import { TestComponent } from './test/test.component';
+import { NewHotelComponent } from './new-hotel/new-hotel.component';
 
 export const routes: Routes = [
   {
-    path: "",
+    path: '',
     component: HotelListComponent,
   },
   {
-    path: "hotels/:id",
+    path: 'hotels/:id',
     component: HotelDetailsComponent,
-    canDeactivate: [formGuard],
   },
   {
-    path: "create-hotel",
-    component: HotelFormComponent,
-    canDeactivate: [formGuard],
+    path: 'testing',
+    component: TestComponent,
   },
   {
-    path: "**",
-    component: NotFoundComponent,
+    path: 'new',
+    component: NewHotelComponent,
   },
 ];

src/app/crossValidator.service.ts

@@ -0,0 +1,36 @@
+import {
+  AbstractControl,
+  FormGroup,
+  ValidationErrors,
+  ValidatorFn,
+} from '@angular/forms';
+
+export class CrossValidator {
+  public crossValidate() {
+    return (control: AbstractControl): ValidationErrors | null => {
+      if (!(control instanceof FormGroup)) {
+        return null;
+      }
+
+      const contactType = control.get('contactType')?.value;
+
+      if (contactType == ('None' || null)) return null;
+
+      let error = null;
+      if (contactType == 'Email') {
+        error =
+          control.get('email')?.value != control.get('emailConfirmation')?.value
+            ? { mismatchEmail: true }
+            : null;
+      } else {
+        error =
+          control.get('phone')?.value != control.get('phoneConfirmation')?.value
+            ? { mismatchPhone: true }
+            : null;
+      }
+
+      console.log('Error: ', error);
+      return error;
+    };
+  }
+}

src/app/form.guard.spec.ts

@@ -1,17 +0,0 @@
-import { TestBed } from '@angular/core/testing';
-import { CanDeactivateFn } from '@angular/router';
-
-import { formGuard } from './form.guard';
-
-describe('formGuard', () => {
-  const executeGuard: CanDeactivateFn = (...guardParameters) => 
-      TestBed.runInInjectionContext(() => formGuard(...guardParameters));
-
-  beforeEach(() => {
-    TestBed.configureTestingModule({});
-  });
-
-  it('should be created', () => {
-    expect(executeGuard).toBeTruthy();
-  });
-});

src/app/form.guard.ts

@@ -1,15 +0,0 @@
-import { CanDeactivateFn } from '@angular/router';
-import { HotelFormComponent } from './hotel-form/hotel-form.component';
-import { HotelDetailsComponent } from './hotel-details/hotel-details.component';
-
-export const formGuard: CanDeactivateFn<HotelFormComponent | HotelDetailsComponent> = (component: HotelFormComponent | HotelDetailsComponent, currentRoute, currentState, nextState) => {
-  const hasUnsavedChanges = 
-    (component instanceof HotelFormComponent && component.form?.dirty) ||
-    (component instanceof HotelDetailsComponent && component.hotelForm?.form?.dirty);
-
-  if (hasUnsavedChanges) {
-    return confirm('You have unsaved changes. Do you really want to leave?');
-  }
-
-  return true;
-};

src/app/hotel-details/hotel-details.component.html

@@ -1,5 +1,5 @@
-<div class="container p-4 mx-auto max-w-4xl">
-  <div *ngIf="hotel">
-    <app-hotel-form [hotel]="hotel" #hotelForm></app-hotel-form>
-  </div>
-</div>
+@if (hotel) {
+  <app-hotel-item [hotel]="hotel" [isDetail]="true"></app-hotel-item>
+  <app-hotel-form [hotel]="hotel"></app-hotel-form>
+  <button class="delete-button" (click)="delete()">😠 DELETE</button>
+}

src/app/hotel-details/hotel-details.component.spec.ts

@@ -8,9 +8,8 @@ describe('HotelDetailsComponent', () => {
 
   beforeEach(async () => {
     await TestBed.configureTestingModule({
-      imports: [HotelDetailsComponent]
-    })
-    .compileComponents();
+      imports: [HotelDetailsComponent],
+    }).compileComponents();
 
     fixture = TestBed.createComponent(HotelDetailsComponent);
     component = fixture.componentInstance;

src/app/hotel-details/hotel-details.component.ts

@@ -1,39 +1,61 @@
 import { HttpClient } from '@angular/common/http';
-import { Component, OnInit, ViewChild } from '@angular/core';
+import { Component, OnInit } from '@angular/core';
 import { ActivatedRoute, Router } from '@angular/router';
-import { Hotel } from '../hotel-item/hotel';
-import { NgIf } from '@angular/common';
+import { Hotel } from '../HotelItem/hotel';
+import { CurrencyPipe, NgFor, NgForOf, NgIf } from '@angular/common';
+import { StarRatingComponent } from '../star-rating/star-rating.component';
+import { HotelItem } from '../HotelItem/HotelItem.component';
 import { catchError, EMPTY } from 'rxjs';
-import { HotelFormComponent } from "../hotel-form/hotel-form.component";
+import { HotelFormComponent } from '../hotel-form/hotel-form.component';
 
 @Component({
   selector: 'app-hotel-details',
   standalone: true,
-  imports: [HotelFormComponent, NgIf],
+  imports: [
+    CurrencyPipe,
+    StarRatingComponent,
+    HotelItem,
+    HotelFormComponent,
+    NgIf,
+    NgForOf,
+  ],
   templateUrl: './hotel-details.component.html',
-  styleUrl: './hotel-details.component.css'
+  styleUrl: './hotel-details.component.css',
 })
 export class HotelDetailsComponent implements OnInit {
   public hotel: any;
 
-  @ViewChild('hotelForm', { static: false })
-  public hotelForm!: HotelFormComponent;
+  constructor(
+    private route: ActivatedRoute,
+    private http: HttpClient,
+    private router: Router,
+  ) {}
 
-  constructor(private route: ActivatedRoute, private http: HttpClient, private router: Router) { }
+  delete(): void {
+    if (confirm('Are u sure u want to delete this hotel')) {
+      this.http
+        .delete<Hotel>('/api/hotels/' + this.route.snapshot.paramMap.get('id'))
+        .subscribe();
+      this.router.navigate(['/']);
+    }
+  }
 
   ngOnInit(): void {
     const routeParams = this.route.snapshot.paramMap;
-    const hotelId = routeParams.get("id");
+    const hotelId = routeParams.get('id');
 
-    this.http.get<Hotel>("api/hotels/" + hotelId).pipe(
-      catchError(() => {
-        alert("Not Found");
-        this.router.navigate(["/"]);
+    this.http
+      .get<Hotel>('api/hotels/' + hotelId)
+      .pipe(
+        catchError(() => {
+          alert('Not Found');
+          this.router.navigate(['/']);
 
-        return EMPTY;
-      })
-    ).subscribe(res => {
-      this.hotel = res;
-    })
+          return EMPTY;
+        }),
+      )
+      .subscribe((res) => {
+        this.hotel = res;
+      });
   }
 }

src/app/hotel-form/hotel-form.component.html

@@ -1,70 +1,47 @@
-<form class="space-y-4 max-w-md mx-auto mt-4" [formGroup]="form">
-  <ng-container *ngFor="let field of ['name', 'description', 'price', 'rating']">
-    <div class="form-group">
-      <label [for]="'hotel' + field" class="block text-sm font-medium text-gray-700">
-        Hotel {{field.charAt(0).toUpperCase() + field.slice(1)}}
-      </label>
-      <input [type]="field === 'price' || field === 'rating' ? 'number' : 'text'" [formControlName]="field"
-        class="form-control mt-1 block w-full p-2 border rounded-md shadow-sm"
-        [ngClass]="{
-          'border-red-500': errorMessage.includes(field),
-          'border-gray-300': !errorMessage.includes(field),
-          'focus:border-red-500': errorMessage.includes(field),
-          'focus:border-blue-500': !errorMessage.includes(field),
-          'focus:ring-red-200': errorMessage.includes(field),
-          'focus:ring-blue-200': !errorMessage.includes(field)
-        }"
-        [id]="'hotel' + field" [placeholder]="'Enter hotel ' + field">
-      <div *ngIf="errorMessage?.includes(field)" class="text-red-500 text-sm mt-1">
-        {{errorMessage}}
-      </div>
-    </div>
-  </ng-container>
-
-  <div class="form-group">
-    <label for="hotelTags" class="block text-sm font-medium text-gray-700">Hotel Tags</label>
-    <div formArrayName="tags">
-      <div *ngFor="let tag of tags.controls; let i=index" class="flex items-center space-x-2">
-        <input type="text" [formControlName]="i"
-          class="form-control mt-1 w-full p-2 border rounded-md shadow-sm"
-          [ngClass]="{
-            'border-red-500': errorMessage.includes('tags'),
-            'border-gray-300': !errorMessage.includes('tags'),
-            'focus:border-red-500': errorMessage.includes('tags'),
-            'focus:border-blue-500': !errorMessage.includes('tags'),
-            'focus:ring-red-200': errorMessage.includes('tags'),
-            'focus:ring-blue-200': !errorMessage.includes('tags')
-          }"
-          [id]="'hotelTag' + i" placeholder="Enter hotel tag">
-        <button mat-icon-button (click)="tags.removeAt(i)" class="mt-1">
-          <mat-icon class="text-red-500">delete</mat-icon>
-        </button>
-      </div>
-      <button type="button" mat-button (click)="addTag()" class="mt-2">Add Tag</button>
-    </div>
-    <div *ngIf="errorMessage.includes('tags')" class="text-red-500 text-sm mt-1">
-      {{errorMessage}}
-    </div>
+<p>hotel-form works!</p>
+<h1>{{ errorMsg }}</h1>
+<form [formGroup]="hotelForm">
+  <label for="name">Name</label>
+  <div class="text-red-500 text-5xl font-bold" *ngIf="errorMessages['name']">
+    {{ errorMessages["name"] }}
   </div>
-
-  <div class="flex justify-between">
-    <div class="flex space-x-1">
-      <button type="submit" mat-flat-button (click)="submit()">Submit</button>
-      <button type="button" mat-stroked-button routerLink="/">Cancel</button>
-    </div>
-    <button mat-stroked-button color="warn" aria-label="Delete hotel" *ngIf="hotel" (click)="showDeleteConfirmation = true">
-      Remove
-    </button>
-
-    <div *ngIf="showDeleteConfirmation" class="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
-      <div class="bg-white p-6 rounded-lg shadow-lg max-w-sm w-full">
-        <h2 class="text-xl font-bold mb-4">Confirm Deletion</h2>
-        <p class="mb-6">Are you sure you want to delete this hotel?</p>
-        <div class="flex justify-end space-x-2">
-          <button mat-stroked-button (click)="showDeleteConfirmation = false">Cancel</button>
-          <button mat-flat-button color="warn" (click)="delete()">Delete</button>
-        </div>
-      </div>
-    </div>
+  <input
+    type="text"
+    class="border-red-500 text-3xl border-3 rounded-full bg-gray-500 font-bold p-3 m-3 border-8"
+    id="name"
+    formControlName="name"
+  />
+  <label for="description">Description</label>
+  <div class="text-red" *ngIf="errorMessages['description']">
+    {{ errorMessages["description"] }}
   </div>
-</form>
+  <input
+    type="text"
+    class="input-field"
+    [class.border-8]="hotelForm.get('description')?.invalid"
+    id="description"
+    formControlName="description"
+  />
+  <label for="price">Price</label>
+  <div class="text-red" *ngIf="errorMessages['price']">
+    {{ errorMessages["price"] }}
+  </div>
+  <input
+    type="number"
+    class="input-field"
+    [class.border-8]="
+      hotelForm.get('price')?.invalid && hotelForm.get('price')?.touched
+    "
+    id="price"
+    formControlName="price"
+  />
+  <button
+    class="submit-button"
+    (click)="submit()"
+    [disabled]="!hotelForm.valid"
+    type="submit"
+  >
+    😃 Submit
+  </button>
+  <a class="back-button" routerLink="/">😭 Cancel</a>
+</form>

src/app/hotel-form/hotel-form.component.spec.ts

@@ -8,9 +8,8 @@ describe('HotelFormComponent', () => {
 
   beforeEach(async () => {
     await TestBed.configureTestingModule({
-      imports: [HotelFormComponent]
-    })
-    .compileComponents();
+      imports: [HotelFormComponent],
+    }).compileComponents();
 
     fixture = TestBed.createComponent(HotelFormComponent);
     component = fixture.componentInstance;

src/app/hotel-form/hotel-form.component.ts

@@ -1,150 +1,90 @@
-import { Component, inject, Input } from '@angular/core';
-import { AbstractControl, FormArray, FormControl, FormGroup, ReactiveFormsModule, Validators } from "@angular/forms";
-import { Hotel } from "../hotel-item/hotel";
+import { Component, Input } from '@angular/core';
+import { Hotel } from '../HotelItem/hotel';
+import {
+  AbstractControl,
+  FormControl,
+  FormGroup,
+  ReactiveFormsModule,
+  Validators,
+} from '@angular/forms';
+import { NgFor, NgIf } from '@angular/common';
 import { HttpClient } from '@angular/common/http';
-import { catchError, debounceTime } from "rxjs";
-import { Router, RouterLink } from "@angular/router";
-import { NgClass, NgFor, NgIf } from "@angular/common";
-import { MatButtonModule } from "@angular/material/button";
-import { MatIconModule } from "@angular/material/icon";
-import { FormsModule } from '@angular/forms';
+import { Router, RouterLink } from '@angular/router';
 
 @Component({
   selector: 'app-hotel-form',
   standalone: true,
-  imports: [
-    ReactiveFormsModule,
-    RouterLink,
-    NgIf,
-    MatButtonModule,
-    MatIconModule,
-    NgFor,
-    FormsModule,
-    NgClass
-  ],
+  imports: [ReactiveFormsModule, NgIf, NgFor, RouterLink],
   templateUrl: './hotel-form.component.html',
-  styleUrl: './hotel-form.component.css'
+  styleUrl: './hotel-form.component.css',
 })
 export class HotelFormComponent {
-  public form!: FormGroup;
+  @Input() public hotel!: Hotel;
+  public hotelForm!: FormGroup;
+  public errorMsg: string = 'testing';
+  errorMessages: Record<string, string> = {};
 
-  @Input()
-  public hotel!: Hotel;
+  constructor(
+    public http: HttpClient,
+    public router: Router,
+  ) {}
 
-  public router: Router = inject(Router);
-
-  public showDeleteConfirmation = false;
-
-  constructor(private http: HttpClient) { }
-
-  public errorMessage: string = '';
-
-  ngOnInit() {
-    this.form = new FormGroup({
-      name: new FormControl(this.hotel?.hotelName || '', [Validators.minLength(3), Validators.required]),
-      description: new FormControl(this.hotel?.description || '', [Validators.minLength(3), Validators.required]),
-      price: new FormControl(this.hotel?.price || '', [Validators.min(0), Validators.required]),
-      rating: new FormControl(this.hotel?.rating || '', [Validators.min(0), Validators.max(5), Validators.required]),
-      tags: new FormArray(this.hotel?.tags?.map(tag => new FormControl(tag)) || [])
-    });
-
-    Object.keys(this.form.controls).forEach(key => {
-      const control = this.form.get(key);
-      control?.valueChanges.pipe(
-        debounceTime(1000)
-      ).subscribe(() => { 
-        this.setError(control as AbstractControl, key);
-      });
-    });
-  }
-
-  public delete() {
-    this.http.delete(`api/hotels/${this.hotel?.id}`).pipe(
-      catchError(err => {
-        console.error('Error deleting hotel', err);
-        return err;
-      })
-    ).subscribe(() => {
-      console.log('Hotel deleted');
-    });
-
-    this.router.navigate(['/']);
-  }
-
-  get tags() {
-    return this.form.get('tags') as FormArray;
-  }
-
-  public addTag() {
-    this.tags.push(new FormControl(''));
-  }
-
-  public submit() {
-    if (this.form.valid && !this.errorMessage) {
-      const hotelData: Hotel = {
-        id: this.hotel?.id || 0,
-        hotelName: this.form.value.name,
-        description: this.form.value.description,
-        price: this.form.value.price,
-        rating: this.form.value.rating,
-        imageUrl: this.hotel?.imageUrl || 'https://placehold.co/2000x1050/EEE/31343C',
-        tags: this.form.value.tags || []
-      };
-
-      if (this.hotel) {
-        this.http.put(`api/hotels/${this.hotel.id}`, hotelData).pipe(
-          catchError(err => {
-            console.error('Error updating hotel', err);
-            return err;
-          })
-        ).subscribe(() => {
-          console.log('Hotel updated');
-        });
-      }
-
-      else {
-        this.http.post('api/hotels', hotelData).pipe(
-          catchError(err => {
-            console.error('Error creating hotel', err);
-            return err;
-          })
-        ).subscribe(() => {
-          console.log('Hotel created');
-        });
-      }
-
-      this.form.reset();
-      this.router.navigate(['/']);
-    }
-  }
-
-  private validationErrors: Record<string, string> = {
-    'required': 'This field is required',
-    'minlength': 'This field must be at least 3 characters long',
-    'min': 'This field must be at least 0',
-    'max': 'This field must be at most 5',
-    'name.required': 'Hotel name is required',
-    'name.minlength': 'Hotel name must be at least 3 characters long',
-    'description.required': 'Hotel description is required', 
-    'description.minlength': 'Hotel description must be at least 3 characters long',
-    'price.required': 'Hotel price is required',
-    'price.min': 'Hotel price cannot be negative',
-    'rating.required': 'Hotel rating is required',
-    'rating.min': 'Hotel rating must be at least 0',
-    'rating.max': 'Hotel rating cannot be more than 5',
-    'tags.required': 'At least one tag is required',
+  private validationErrorMessages: Record<string, string> = {
+    required: 'This field is required',
+    minlength: 'The value is too short',
+    maxlength: 'The value is too long',
+    pattern: 'The value format is incorrect',
   };
 
-  private setError(control: AbstractControl, controlName: string) {
-    if ((control.touched || control.dirty) && control.errors) {
-      const errors = Object.keys(control.errors).map(key => {
-        const errorKey = `${controlName}.${key}`;
-        return this.validationErrors[errorKey] || this.validationErrors[key];
-      });
-      this.errorMessage = errors.join(' ');
-    } else {
-      this.errorMessage = '';
+  setMessage(value: AbstractControl): void {
+    if ((value.touched || value.dirty) && value.errors) {
+      this.errorMsg = Object.keys(value.errors)
+        .map((key) => {
+          console.log(this.validationErrorMessages[key]);
+          return this.validationErrorMessages[key] || `Unknown error: ${key}`;
+        })
+        .join(' ');
     }
   }
-}
 
+  updateErrorMessages(): void {
+    this.errorMessages = {};
+
+    Object.keys(this.hotelForm.controls).forEach((field) => {
+      const control = this.hotelForm.get(field);
+
+      if (control && control.errors) {
+        this.errorMessages[field] = Object.keys(control.errors)
+          .map(
+            (errorKey) =>
+              this.validationErrorMessages[errorKey] ||
+              `Unknown error: ${errorKey}`,
+          )
+          .join(' ');
+      }
+    });
+  }
+
+  ngOnInit(): void {
+    this.hotelForm = new FormGroup({
+      name: new FormControl(this.hotel.hotelName, Validators.required),
+      description: new FormControl(this.hotel.description, Validators.required),
+      price: new FormControl(this.hotel.price, Validators.required),
+    });
+
+    // this.hotelForm.valueChanges.subscribe(data => this.setMessage(this.hotelForm.get("name")!));
+    // this.hotelForm.valueChanges.subscribe(data => this.setMessage(this.hotelForm.get("description")!));
+    // this.hotelForm.valueChanges.subscribe(data => this.setMessage(this.hotelForm.get("price")!));
+    //
+    this.hotelForm.valueChanges.subscribe(() => this.updateErrorMessages());
+  }
+
+  submit(): void {
+    this.hotel.hotelName = this.hotelForm.get('name')?.value;
+    this.hotel.description = this.hotelForm.get('description')?.value;
+    this.hotel.price = this.hotelForm.get('price')?.value;
+    console.log(this.hotelForm.value);
+    this.http.put('/api/hotels/' + this.hotel.id, this.hotel).subscribe();
+    this.router.navigate(['/']);
+  }
+}

src/app/hotel-item/HotelItem.component.html

@@ -1,8 +0,0 @@
-<p class="text-2xl font-bold text-gray-800 mb-2">Name: {{hotel.hotelName}}</p>
-<p class="text-base text-gray-600 mb-4">Description: {{hotel.description}}</p>
-<p class="text-lg font-medium text-green-600 mb-4">Price: {{hotel.price | currency : getCurrencyCode(selectedLanguage) : "symbol" : "2.2-2" : selectedLanguage}}</p>
-<select [ngModel]="selectedLanguage" (ngModelChange)="languageChange($event)" class="block w-full p-2 border border-gray-300 rounded-md mb-4 focus:border-blue-500 focus:ring focus:ring-blue-200">
-  <option *ngFor="let lang of langs" [value]="lang.code" [selected]="lang.lang == 'de'">{{lang.lang}}</option>
-</select>
-<img src="{{hotel.imageUrl}}" alt="Hotel" class="w-full h-auto rounded-lg shadow-lg mb-4">
-<a *ngIf="!isDetail" routerLink="/hotels/{{hotel.id}}" class="text-blue-600 hover:text-blue-800 hover:underline mb-4 block">Details</a>

src/app/hotel-item/HotelItem.component.ts

@@ -1,53 +0,0 @@
-import { Component, Input } from "@angular/core";
-import { Hotel } from "./hotel";
-import {CurrencyPipe, NgForOf, NgIf} from "@angular/common";
-import { FormsModule } from "@angular/forms";
-import { RouterLink } from "@angular/router";
-
-@Component({
-  selector: 'app-hotel-item',
-  standalone: true,
-  templateUrl: './HotelItem.component.html',
-  imports: [CurrencyPipe, FormsModule, NgIf, RouterLink, NgForOf],
-})
-export class HotelItem {
-
-  @Input() public hotel!: Hotel;
-  public selectedLanguage?: string;
-
-  @Input() public isDetail: boolean = false;
-
-  public languageChange(lang: string) {
-    this.selectedLanguage = lang;
-    console.log(this.selectedLanguage);
-  }
-
-  public getCurrencyCode(langCode: string | undefined): string {
-    if (!langCode) return '';
-
-    for (let language of this.langs) {
-      if (language.code === langCode) {
-        return language.currency;
-      }
-    }
-    return '';
-  }
-
-  public langs = [
-    {
-      "lang": "en",
-      "code": "en-US",
-      "currency": "USD"
-    },
-    {
-      "lang": "cn",
-      "code": "cn-CN",
-      "currency": "CNY"
-    },
-    {
-      "lang": "de",
-      "code": "de-DE",
-      "currency": "EUR"
-    }
-  ];
-}

src/app/hotel-list/hotel-list.component.html

@@ -1,28 +1,13 @@
 <div class="container p-4 mx-auto max-w-4xl">
-  <div class="fixed top-0 left-0 w-full bg-white/80 backdrop-blur-xl z-50">
-    <div class="justify-center max-w-4xl container p-4 mx-auto">
-      <h1 class="">{{'hello' | uppercase | text}}</h1>
-      <app-search [(input)]="search"></app-search>
-      <button routerLink="/create-hotel" mat-flat-button
-        class="btn btn-primary bg-blue-500 text-white font-semibold py-2 px-4 rounded-md shadow-md hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-blue-400 focus:ring-opacity-75 my-4">Create
-        New Hotel</button>
-    </div>
-  </div>
-  <div *ngIf="hotels[0].hotelName" class="mt-64">
+  <h1>{{ "hello" | uppercase | text }}</h1>
+  <a class="submit-button" routerLink="/new">CREATE NEW HOTEL</a>
+  <app-search [(input)]="search"></app-search>
+  @if (hotels[0].hotelName) {
     <div *ngFor="let hotel of hotels">
-      <app-hotel-item *ngIf="hotel.hotelName.toLowerCase().includes(search.toLowerCase())" [hotel]="hotel"></app-hotel-item>
+      <app-hotel-item
+        *ngIf="hotel.hotelName.toLowerCase().includes(search.toLowerCase())"
+        [hotel]="hotel"
+      ></app-hotel-item>
     </div>
-  </div>
-
-  <div *ngIf="!hotels[0].hotelName" class="mt-64">
-    <div class="animate-pulse space-y-4">
-      <div class="h-8 bg-gray-200 rounded w-52"></div>
-      <div class="space-y-3">
-        <div class="h-4 bg-gray-200 rounded w-3/4"></div>
-        <div class="h-4 bg-gray-200 rounded w-11/12"></div>
-        <div class="h-4 bg-gray-200 rounded w-2/3"></div>
-      </div>
-      <div class="h-[300px] bg-gray-200 rounded w-full"></div>
-    </div>
-  </div>
+  }
 </div>

src/app/hotel-list/hotel-list.component.spec.ts

@@ -8,9 +8,8 @@ describe('HotelListComponent', () => {
 
   beforeEach(async () => {
     await TestBed.configureTestingModule({
-      imports: [HotelListComponent]
-    })
-    .compileComponents();
+      imports: [HotelListComponent],
+    }).compileComponents();
 
     fixture = TestBed.createComponent(HotelListComponent);
     component = fixture.componentInstance;

src/app/hotel-list/hotel-list.component.ts

@@ -1,33 +1,83 @@
-import { NgFor, NgIf, UpperCasePipe } from '@angular/common';
+import { CommonModule, NgFor, NgIf, UpperCasePipe } from '@angular/common';
 import { Component, inject } from '@angular/core';
 import { TextPipe } from '../../text.pipe';
-import { SearchComponent } from '../search/search.component';
-import { HotelService } from '../service/hotel.service';
-import { Hotel } from '../hotel-item/hotel';
+import { SearchComponent } from '../Search/search.component';
+import { HotelService } from '../Parent/services/hotel.service';
+import { Hotel } from '../HotelItem/hotel';
 import { HttpClient } from '@angular/common/http';
-import { HotelItem } from '../hotel-item/HotelItem.component';
+import { filter, from, last, map, Observable, scan } from 'rxjs';
+import { HotelItem } from '../HotelItem/HotelItem.component';
 import { RouterLink } from '@angular/router';
-import { MatButtonModule } from '@angular/material/button';
+
+interface User {
+  name: string;
+  age: number;
+}
 
 @Component({
   selector: 'app-hotel-list',
   standalone: true,
-  imports: [UpperCasePipe, TextPipe, SearchComponent, HotelItem, NgFor, NgIf, RouterLink, MatButtonModule],
+  imports: [
+    UpperCasePipe,
+    TextPipe,
+    SearchComponent,
+    HotelItem,
+    NgFor,
+    NgIf,
+    RouterLink,
+  ],
   templateUrl: './hotel-list.component.html',
-  styleUrl: './hotel-list.component.css'
+  styleUrl: './hotel-list.component.css',
 })
 export class HotelListComponent {
-  public search: string = "";
+  public search: string = '';
   public hotelService: HotelService = inject(HotelService);
   public response: any = null;
   public hotels: Array<Hotel> = [{} as Hotel];
 
-  constructor (private http: HttpClient) {
-  }
+  constructor(private http: HttpClient) {}
 
   ngOnInit() {
-    this.http.get<Array<Hotel>>("api/hotels").subscribe(res => {
+    this.http.get<Array<Hotel>>('api/hotels').subscribe((res) => {
       this.hotels = res;
     });
+
+    const users = [
+      { name: 'Max', age: 21 },
+      { name: 'Peter', age: 31 },
+      { name: 'Hans', age: 13 },
+      { name: 'Klaus', age: 51 },
+      { name: 'Dieter', age: 1 },
+      { name: 'Jan-Marlon', age: 3 },
+    ];
+
+    const stream: Observable<User> = from(users);
+
+    stream
+      .pipe(
+        filter((user) => user.age > 18),
+        scan((acc, user) => acc + user.age, 0),
+        map((ageSum, index) => ageSum / (index + 1)),
+        last(),
+      )
+      .subscribe(console.log);
+
+    // const stream: Observable<number | string> = from([5, 1, 2, 12, 5, 14, 17, 5, "testing"]);
+
+    // stream.pipe(
+    //  filter((value) => typeof value === "number"),
+    //  tap((value) => console.log("Zahl:" + value)),
+    //  filter((value: number) => value % 2 === 0),
+    //  tap((value) => console.log("Gerade Zahl: " + value)),
+    //  toArray(),
+    //).subscribe(console.log);
   }
+
+  public test() {
+    console.log(this.search);
+  }
+
+  // public foundHotels = this.hotels.pipe(
+  //   filter((hotel) => hotel.hotelName.includes(this.search)),
+  // );
 }

src/app/new-hotel/new-hotel.component.html

@@ -0,0 +1,120 @@
+<p>Create Hotel</p>
+
+<form [formGroup]="hotelForm">
+  <div class="text-red-500 bg-white m-3" *ngIf="errorMessages['form']">
+    {{ errorMessages["form"] }}
+  </div>
+
+  <label for="name">Name</label>
+  <div class="text-red-500" *ngIf="errorMessages['name']">
+    {{ errorMessages["name"] }}
+  </div>
+  <input
+    type="text"
+    class="border-red-500"
+    [class.border-8]="
+      hotelForm.get('name')?.invalid && hotelForm.get('name')?.touched
+    "
+    id="name"
+    formControlName="name"
+  />
+  <label for="description">Description</label>
+  <div class="text-red-500" *ngIf="errorMessages['description']">
+    {{ errorMessages["description"] }}
+  </div>
+  <input
+    type="text"
+    class="border-red-500"
+    [class.border-8]="
+      hotelForm.get('description')?.invalid &&
+      hotelForm.get('description')?.touched
+    "
+    id="description"
+    formControlName="description"
+  />
+  <label for="imageUrl">Image</label>
+  <div class="text-red-500" *ngIf="errorMessages['imageUrl']">
+    {{ errorMessages["imageUrl"] }}
+  </div>
+  <input
+    type="url"
+    class="border-red-500"
+    [class.border-8]="
+      hotelForm.get('imageUel')?.invalid && hotelForm.get('imageUrl')?.touched
+    "
+    id="imageUrl"
+    formControlName="imageUrl"
+  />
+  <label for="price">Price</label>
+  <div class="text-red-500" *ngIf="errorMessages['price']">
+    {{ errorMessages["price"] }}
+  </div>
+  <input
+    type="number"
+    class="border-red-500"
+    [class.border-8]="hotelForm.get('price')?.invalid"
+    id="price"
+    formControlName="price"
+  />
+  <label for="rating">Rating</label>
+  <div class="text-red-500" *ngIf="errorMessages['rating']">
+    {{ errorMessages["rating"] }}
+  </div>
+  <input
+    type="rating"
+    class="border-red-500"
+    [class.border-8]="hotelForm.get('rating')?.invalid"
+    id="rating"
+    formControlName="rating"
+  />
+  <button class="submit-button" (click)="addTag()">Add Tag</button>
+  @for (tag of getTags().controls; track tag) {
+    <input
+      type="tag"
+      class="border-red-500"
+      [class.border-8]="hotelForm.get('tag')?.invalid"
+      id="tag"
+      formControlName="tag"
+    />
+    <button (click)="deleteTag(tag)" class="delete-button">delete</button>
+  }
+
+  <input type="radio" value="None" formControlName="contactType" />None
+  <input type="radio" value="Email" formControlName="contactType" />Email
+  <input type="radio" value="SMS" formControlName="contactType" />SMS
+
+  @if (hotelForm.get("contactType")?.value == "Email") {
+    <div class="mt-3">
+      <label for="email">Email</label>
+      <input type="email" formControlName="email" id="email" />
+      <label for="emailConfirmation">Email Confirmation</label>
+      <input
+        type="email"
+        formControlName="emailConfirmation"
+        id="emailConfirmation"
+      />
+    </div>
+  }
+  @if (hotelForm.get("contactType")?.value == "SMS") {
+    <div class="mt-3">
+      <label for="phone">Phone Number</label>
+      <input type="tel" formControlName="phone" id="phone" />
+      <label for="phoneConfirmation">Phone Number Confirmation</label>
+      <input
+        type="tel"
+        formControlName="phoneConfirmation"
+        id="phoneConfirmation"
+      />
+    </div>
+  }
+
+  <button
+    class="submit-button"
+    (click)="submit()"
+    [disabled]="!hotelForm.valid"
+    type="submit"
+  >
+    Submit
+  </button>
+  <a routerLink="/" class="delete-button">Cancel</a>
+</form>

src/app/new-hotel/new-hotel.component.spec.ts

@@ -0,0 +1,22 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { NewHotelComponent } from './new-hotel.component';
+
+describe('NewHotelComponent', () => {
+  let component: NewHotelComponent;
+  let fixture: ComponentFixture<NewHotelComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [NewHotelComponent],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(NewHotelComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/new-hotel/new-hotel.component.ts

@@ -0,0 +1,139 @@
+import { HttpClient } from '@angular/common/http';
+import { Component } from '@angular/core';
+import {
+  AbstractControl,
+  FormArray,
+  FormControl,
+  FormGroup,
+  ReactiveFormsModule,
+  Validators,
+} from '@angular/forms';
+import { Router, RouterLink } from '@angular/router';
+import { Hotel } from '../HotelItem/hotel';
+import { NgFor, NgIf } from '@angular/common';
+import { CrossValidator } from '../crossValidator.service';
+
+@Component({
+  selector: 'app-new-hotel',
+  standalone: true,
+  imports: [ReactiveFormsModule, NgIf, NgFor, RouterLink],
+  templateUrl: './new-hotel.component.html',
+  styleUrl: './new-hotel.component.css',
+})
+export class NewHotelComponent {
+  public hotelForm!: FormGroup;
+  public hotel!: Hotel;
+  errorMessages: Record<string, string> = {};
+
+  private validationErrorMessages: Record<string, string> = {
+    required: 'This field is required',
+    minlength: 'The value is too short',
+    maxlength: 'The value is too long',
+    pattern: 'The value format is incorrect',
+  };
+
+  private fullFormValidationErrorMessages: Record<string, string> = {
+    mismatch: 'The name and description have to be the same',
+    mismatchEmail: 'The Emails must be the same.',
+    mismatchPhone: 'The Phone numbers must be the same.',
+  };
+
+  updateErrorMessages(): void {
+    this.errorMessages = {};
+
+    Object.keys(this.hotelForm.controls).forEach((field) => {
+      const control = this.hotelForm.get(field);
+
+      if (control && control.errors && control.touched) {
+        this.errorMessages[field] = Object.keys(control.errors)
+          .map(
+            (errorKey) =>
+              this.validationErrorMessages[errorKey] ||
+              `Unknown error: ${errorKey}`,
+          )
+          .join(' ');
+      }
+    });
+
+    if (this.hotelForm.errors) {
+      Object.keys(this.hotelForm.errors).forEach((errorKey) => {
+        const errorMessage =
+          this.fullFormValidationErrorMessages[errorKey] ||
+          `Unknown error: ${errorKey}`;
+        this.errorMessages['form'] = errorMessage;
+      });
+    }
+
+    console.log(this.errorMessages);
+  }
+
+  ngOnInit(): void {
+    const tags = [];
+
+    for (const tag of this.hotel?.tags ?? []) {
+      tags.push(new FormControl(tag, [Validators.required]));
+    }
+
+    this.hotelForm = new FormGroup(
+      {
+        name: new FormControl('', Validators.required),
+        description: new FormControl('', Validators.required),
+        price: new FormControl(0, Validators.required),
+        imageUrl: new FormControl('', Validators.required),
+        rating: new FormControl(0, Validators.required),
+        contactType: new FormControl('None'),
+        email: new FormControl(''),
+        emailConfirmation: new FormControl(''),
+        phone: new FormControl(''),
+        phoneConfirmation: new FormControl(''),
+        tags: new FormArray(tags),
+      },
+      { validators: new CrossValidator().crossValidate() },
+    );
+
+    this.hotelForm.valueChanges.subscribe(() => this.updateErrorMessages());
+    this.hotelForm.valueChanges.subscribe(() => this.formUpdated());
+  }
+
+  formUpdated() {
+    console.log(this.hotelForm.get('contactType')?.value);
+  }
+
+  getTags() {
+    return this.hotelForm.controls['tags'] as FormArray;
+  }
+
+  deleteTag(tagElement: AbstractControl) {
+    this.getTags().removeAt(this.getTags().controls.indexOf(tagElement));
+  }
+
+  addTag() {
+    this.getTags().push(new FormControl('', [Validators.required]));
+  }
+
+  constructor(
+    public http: HttpClient,
+    public router: Router,
+  ) {}
+
+  submit(): void {
+    console.log(this.hotelForm.value);
+    const hotel: Hotel = {
+      id: 0,
+      hotelName: this.hotelForm.get('name')?.value,
+      description: this.hotelForm.get('description')?.value,
+      price: this.hotelForm.get('price')?.value,
+      imageUrl: this.hotelForm.get('imageUrl')?.value,
+      rating: this.hotelForm.get('rating')?.value,
+      tags: this.hotelForm.get('tags')?.value,
+    };
+
+    if (this.hotelForm.get('contactType')?.value == 'Email') {
+      hotel.email = this.hotelForm.get('email')?.value;
+    } else {
+      hotel.phone = this.hotelForm.get('phone')?.value;
+    }
+    this.http.post('/api/hotels/', hotel).subscribe();
+    this.router.navigate(['/']);
+  }
+}

src/app/not-found/not-found.component.html

@@ -1,7 +0,0 @@
-<div class="min-h-screen flex items-center justify-center bg-gray-100">
-  <div class="text-center">
-    <h1 class="text-9xl font-bold text-gray-800">404</h1>
-    <p class="text-2xl font-medium text-gray-600 mb-8">Page Not Found</p>
-    <a type="submit" mat-flat-button routerLink="/">Return Home</a>
-  </div>
-</div>

src/app/not-found/not-found.component.spec.ts

@@ -1,23 +0,0 @@
-import { ComponentFixture, TestBed } from '@angular/core/testing';
-
-import { NotFoundComponent } from './not-found.component';
-
-describe('NotFoundComponent', () => {
-  let component: NotFoundComponent;
-  let fixture: ComponentFixture<NotFoundComponent>;
-
-  beforeEach(async () => {
-    await TestBed.configureTestingModule({
-      imports: [NotFoundComponent]
-    })
-    .compileComponents();
-
-    fixture = TestBed.createComponent(NotFoundComponent);
-    component = fixture.componentInstance;
-    fixture.detectChanges();
-  });
-
-  it('should create', () => {
-    expect(component).toBeTruthy();
-  });
-});

src/app/not-found/not-found.component.ts

@@ -1,17 +0,0 @@
-import { Component } from '@angular/core';
-import { MatButtonModule } from '@angular/material/button';
-import { RouterLink } from '@angular/router';
-
-@Component({
-  selector: 'app-not-found',
-  standalone: true,
-  imports: [
-    MatButtonModule,
-    RouterLink
-  ],
-  templateUrl: './not-found.component.html',
-  styleUrl: './not-found.component.css'
-})
-export class NotFoundComponent {
-
-}

src/app/service/hotel.service.ts

@@ -1,51 +0,0 @@
-import { Injectable } from "@angular/core";
-import { Hotel } from "../hotel-item/hotel";
-import { HttpClient, HttpErrorResponse } from "@angular/common/http";
-import { Observable, throwError, catchError } from "rxjs";
-
-@Injectable({
-  providedIn: 'root'
-})
-export class HotelService {
-  private apiUrl = 'api/hotels';
-
-  constructor(private http: HttpClient) {}
-
-  private handleError(error: HttpErrorResponse) {
-    let errorMessage = 'An error occurred';
-    if (error.error instanceof ErrorEvent) {
-      // Client-side error
-      errorMessage = `Error: ${error.error.message}`;
-    } else {
-      // Server-side error
-      errorMessage = `Error Code: ${error.status}\nMessage: ${error.message}`;
-    }
-    console.error(errorMessage);
-    return throwError(() => errorMessage);
-  }
-
-  public getHotels(): Observable<Hotel[]> {
-    return this.http.get<Hotel[]>(this.apiUrl)
-      .pipe(catchError(this.handleError));
-  }
-
-  public getHotel(id: number): Observable<Hotel> {
-    return this.http.get<Hotel>(`${this.apiUrl}/${id}`)
-      .pipe(catchError(this.handleError));
-  }
-
-  public createHotel(hotel: Hotel): Observable<Hotel> {
-    return this.http.post<Hotel>(this.apiUrl, hotel)
-      .pipe(catchError(this.handleError));
-  }
-
-  public updateHotel(hotel: Hotel): Observable<Hotel> {
-    return this.http.put<Hotel>(`${this.apiUrl}/${hotel.id}`, hotel)
-      .pipe(catchError(this.handleError));
-  }
-
-  public deleteHotel(id: number): Observable<{}> {
-    return this.http.delete(`${this.apiUrl}/${id}`)
-      .pipe(catchError(this.handleError));
-  }
-}

src/app/star-rating/star-rating.component.spec.ts

@@ -8,9 +8,8 @@ describe('StarRatingComponent', () => {
 
   beforeEach(async () => {
     await TestBed.configureTestingModule({
-      imports: [StarRatingComponent]
-    })
-    .compileComponents();
+      imports: [StarRatingComponent],
+    }).compileComponents();
 
     fixture = TestBed.createComponent(StarRatingComponent);
     component = fixture.componentInstance;

src/app/star-rating/star-rating.component.ts

@@ -6,7 +6,7 @@ import { Component, Input } from '@angular/core';
   standalone: true,
   imports: [NgClass, NgFor],
   templateUrl: './star-rating.component.html',
-  styleUrl: './star-rating.component.css'
+  styleUrl: './star-rating.component.css',
 })
 export class StarRatingComponent {
   @Input() public rating: number = 0;

src/app/test/test.component.html

@@ -0,0 +1,15 @@
+<p>test works!</p>
+
+<form [formGroup]="loginForm">
+  <label for="username">Username</label>
+  <input
+    type="text"
+    id="username"
+    autocomplete="username"
+    formControlName="username"
+  />
+  <label for="password">Password</label>
+  <input type="password" id="password" formControlName="password" />
+  <button (click)="submit()" type="submit">Login</button>
+  <button type="reset" (click)="reset()">Reset</button>
+</form>

src/app/test/test.component.spec.ts

@@ -0,0 +1,22 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { TestComponent } from './test.component';
+
+describe('TestComponent', () => {
+  let component: TestComponent;
+  let fixture: ComponentFixture<TestComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      imports: [TestComponent],
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(TestComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/test/test.component.ts

@@ -0,0 +1,34 @@
+import { Component } from '@angular/core';
+import { FormControl, FormGroup, ReactiveFormsModule } from '@angular/forms';
+
+@Component({
+  selector: 'app-test',
+  standalone: true,
+  imports: [ReactiveFormsModule],
+  templateUrl: './test.component.html',
+  styleUrl: './test.component.css',
+})
+export class TestComponent {
+  public loginForm!: FormGroup;
+
+  public ngOnInit(): void {
+    this.loginForm = this.setUpLoginForm();
+
+    console.log(this.loginForm);
+  }
+
+  setUpLoginForm(): FormGroup {
+    return new FormGroup({
+      username: new FormControl('Jan'),
+      password: new FormControl(''),
+    });
+  }
+
+  reset(): void {
+    this.loginForm = this.setUpLoginForm();
+  }
+
+  submit(): void {
+    console.log(this.loginForm.value);
+  }
+}

src/currency.pipe.ts

@@ -1,11 +1,11 @@
-import {Pipe, PipeTransform} from '@angular/core';
+import { Pipe, PipeTransform } from '@angular/core';
 
 @Pipe({
   name: 'jkcurrency',
-  standalone: true
+  standalone: true,
 })
 export class CurrencyPipe implements PipeTransform {
   transform(value: string): string {
-    return value.replaceAll("L", "P");
+    return value.replaceAll('L', 'P');
   }
 }

src/index.html

@@ -1,16 +1,14 @@
 <!doctype html>
 <html lang="en">
-<head>
-  <meta charset="utf-8">
-  <title>HotelManager</title>
-  <base href="/">
-  <meta name="viewport" content="width=device-width, initial-scale=1">
-  <link rel="icon" type="image/x-icon" href="favicon.ico">
-  <link rel="stylesheet" href="./styles.css">
-  <link href="https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500&display=swap" rel="stylesheet">
-  <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
-</head>
-<body class="mat-typography">
-  <app-root></app-root>
-</body>
+  <head>
+    <meta charset="utf-8" />
+    <title>HotelManager</title>
+    <base href="/" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <link rel="icon" type="image/x-icon" href="favicon.ico" />
+    <link rel="stylesheet" href="./styles.css" />
+  </head>
+  <body class="bg-pink-600 p-32">
+    <app-root></app-root>
+  </body>
 </html>

src/main.ts

@@ -2,5 +2,6 @@ import { bootstrapApplication } from '@angular/platform-browser';
 import { appConfig } from './app/app.config';
 import { AppComponent } from './app/app.component';
 
-bootstrapApplication(AppComponent, appConfig)
-  .catch((err) => console.error(err));
+bootstrapApplication(AppComponent, appConfig).catch((err) =>
+  console.error(err),
+);

src/styles.css

@@ -7,5 +7,18 @@
   @apply border-black rounded px-3 py-1 border-[3px];
 }
 
-html, body { height: 100%; }
-body { margin: 0; font-family: Roboto, "Helvetica Neue", sans-serif; }
+.input-field {
+  @apply border-red-500 text-3xl rounded-full bg-gray-500 font-bold p-3 m-3 border-8;
+}
+
+.back-button {
+  @apply border-black rounded bg-blue-500 border-[30px] m-3 text-3xl font-bold p-3;
+}
+
+.submit-button {
+  @apply border-black rounded-full bg-green-500 border-[30px] m-3 text-3xl font-bold p-3;
+}
+
+.delete-button {
+  @apply border-black rounded bg-red-500 border-[30px] m-3 text-3xl font-bold p-3;
+}

src/text.pipe.ts

@@ -1,11 +1,11 @@
-import {Pipe, PipeTransform} from '@angular/core';
+import { Pipe, PipeTransform } from '@angular/core';
 
 @Pipe({
   name: 'text',
-  standalone: true
+  standalone: true,
 })
 export class TextPipe implements PipeTransform {
   transform(value: string): string {
-    return value.replaceAll("L", "P");
+    return value.replaceAll('L', 'P');
   }
 }

tailwind.config.js

@@ -1,9 +1,25 @@
 /** @type {import('tailwindcss').Config} */
 
-module.exports = {
-  content: [
-    "./src/**/*.{html,ts}",
-  ],
-  plugins: [],
-}
+const colors = require("tailwindcss/colors");
 
+module.exports = {
+  content: ["./src/**/*.{html,ts}"],
+  theme: {
+    extend: {
+      colors: {
+        ...colors,
+      },
+      keyframes: {
+        shake: {
+          "0%, 100%": { transform: "translateX(0)" },
+          "25%": { transform: "translateX(-30px)" },
+          "75%": { transform: "translateX(30px)" },
+        },
+      },
+      animation: {
+        shake: "shake 10s ease-in-out infinite",
+      },
+    },
+  },
+  plugins: [],
+};

tsconfig.app.json

@@ -6,10 +6,6 @@
     "outDir": "./out-tsc/app",
     "types": []
   },
-  "files": [
-    "src/main.ts"
-  ],
-  "include": [
-    "src/**/*.d.ts"
-  ]
+  "files": ["src/main.ts"],
+  "include": ["src/**/*.d.ts"]
 }

tsconfig.json

@@ -18,10 +18,7 @@
     "importHelpers": true,
     "target": "ES2022",
     "module": "ES2022",
-    "lib": [
-      "ES2022",
-      "dom"
-    ]
+    "lib": ["ES2022", "dom"]
   },
   "angularCompilerOptions": {
     "enableI18nLegacyMessageIdFormat": false,

tsconfig.spec.json

@@ -4,12 +4,7 @@
   "extends": "./tsconfig.json",
   "compilerOptions": {
     "outDir": "./out-tsc/spec",
-    "types": [
-      "jasmine"
-    ]
+    "types": ["jasmine"]
   },
-  "include": [
-    "src/**/*.spec.ts",
-    "src/**/*.d.ts"
-  ]
+  "include": ["src/**/*.spec.ts", "src/**/*.d.ts"]
 }