US01: Make it possible for the user to add a horse through the API

frontend/wendys-friends/src/app/app-routing.module.ts

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+import { NgModule } from '@angular/core';
+import { Routes, RouterModule } from '@angular/router';
+import {OwnerComponent} from './component/owner/owner.component';
+
+
+const routes: Routes = [
+  {path: '', redirectTo: 'owner', pathMatch: 'full'},
+  {path: 'owner', component: OwnerComponent}
+];
+
+@NgModule({
+  imports: [RouterModule.forRoot(routes)],
+  exports: [RouterModule]
+})
+export class AppRoutingModule { }

frontend/wendys-friends/src/app/app.component.html

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+<app-header></app-header>
+
+<div class="container">
+  <router-outlet></router-outlet>
+</div>
+
+

frontend/wendys-friends/src/app/app.component.spec.ts

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+import { TestBed, async } from '@angular/core/testing';
+import { RouterTestingModule } from '@angular/router/testing';
+import { AppComponent } from './app.component';
+
+describe('AppComponent', () => {
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      imports: [
+        RouterTestingModule
+      ],
+      declarations: [
+        AppComponent
+      ],
+    }).compileComponents();
+  }));
+
+  it('should create the app', () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    const app = fixture.debugElement.componentInstance;
+    expect(app).toBeTruthy();
+  });
+
+  it(`should have as title 'wendys-friends'`, () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    const app = fixture.debugElement.componentInstance;
+    expect(app.title).toEqual('wendys-friends');
+  });
+
+  it('should render title', () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    fixture.detectChanges();
+    const compiled = fixture.debugElement.nativeElement;
+    expect(compiled.querySelector('.content span').textContent).toContain('wendys-friends app is running!');
+  });
+});

frontend/wendys-friends/src/app/app.component.ts

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+import { Component } from '@angular/core';
+
+@Component({
+  selector: 'app-root',
+  templateUrl: './app.component.html',
+  styleUrls: ['./app.component.scss']
+})
+export class AppComponent {
+  title = 'wendys-friends';
+}

frontend/wendys-friends/src/app/app.module.ts

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+import {BrowserModule} from '@angular/platform-browser';
+import {NgModule} from '@angular/core';
+
+import {AppRoutingModule} from './app-routing.module';
+import {AppComponent} from './app.component';
+import {HeaderComponent} from './component/header/header.component';
+import {OwnerComponent} from './component/owner/owner.component';
+import {HttpClientModule} from '@angular/common/http';
+
+@NgModule({
+  declarations: [
+    AppComponent,
+    HeaderComponent,
+    OwnerComponent
+  ],
+  imports: [
+    BrowserModule,
+    AppRoutingModule,
+    HttpClientModule
+  ],
+  providers: [],
+  bootstrap: [AppComponent]
+})
+export class AppModule {
+}

frontend/wendys-friends/src/app/component/header/header.component.html

@@ -0,0 +1,13 @@
+<nav class="navbar navbar-expand-lg navbar-dark bg-dark">
+  <a class="navbar-brand" href="#">Wendy's Friends</a>
+  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup"
+          aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
+    <span class="navbar-toggler-icon"></span>
+  </button>
+  <div class="collapse navbar-collapse" id="navbarNavAltMarkup">
+    <div class="navbar-nav">
+      <a class="nav-item nav-link" routerLink="/owner">Horse Owner <span class="sr-only">(current)</span></a>
+      <a class="nav-item nav-link" href="#">Horses</a>
+    </div>
+  </div>
+</nav>

frontend/wendys-friends/src/app/component/header/header.component.spec.ts

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+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { HeaderComponent } from './header.component';
+
+describe('HeaderComponent', () => {
+  let component: HeaderComponent;
+  let fixture: ComponentFixture<HeaderComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ HeaderComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(HeaderComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

frontend/wendys-friends/src/app/component/header/header.component.ts

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+import { Component, OnInit } from '@angular/core';
+
+@Component({
+  selector: 'app-header',
+  templateUrl: './header.component.html',
+  styleUrls: ['./header.component.scss']
+})
+export class HeaderComponent implements OnInit {
+
+  constructor() { }
+
+  ngOnInit() {
+  }
+
+}

frontend/wendys-friends/src/app/component/owner/owner.component.html

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+<div *ngIf="error" class="alert alert-danger alert-dismissible fade show" role="alert">
+  <strong>Error! </strong> {{ errorMessage }}
+  <button type="button" (click)="vanishError()" class="close" data-dismiss="alert" aria-label="Close">
+    <span aria-hidden="true">&times;</span>
+  </button>
+</div>
+
+<div class="container mt-3" *ngIf="owner">
+  <div class="alert alert-success" role="alert">
+    <h4 class="alert-heading">Well done!</h4>
+    <p>Your application is up and running</p>
+    <hr>
+    <p>This is the name of the owner with id 1 from your backend system:
+      <span class="font-weight-bold">{{owner.name}}</span>
+    </p>
+  </div>
+</div>
+
+

frontend/wendys-friends/src/app/component/owner/owner.component.ts

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+import {Component, OnInit} from '@angular/core';
+import {OwnerService} from '../../service/owner.service';
+import {Owner} from '../../dto/owner';
+
+@Component({
+  selector: 'app-owner',
+  templateUrl: './owner.component.html',
+  styleUrls: ['./owner.component.scss']
+})
+export class OwnerComponent implements OnInit {
+
+  error = false;
+  errorMessage = '';
+  owner: Owner;
+
+  constructor(private ownerService: OwnerService) {
+  }
+
+  ngOnInit() {
+    this.loadOwner(1);
+  }
+
+  /**
+   * Error flag will be deactivated, which clears the error message
+   */
+  vanishError() {
+    this.error = false;
+  }
+
+  /**
+   * Loads the owner for the specified id
+   * @param id the id of the owner
+   */
+  private loadOwner(id: number) {
+    this.ownerService.getOwnerById(id).subscribe(
+      (owner: Owner) => {
+        this.owner = owner;
+      },
+      error => {
+        this.defaultServiceErrorHandling(error);
+      }
+    );
+  }
+
+  private defaultServiceErrorHandling(error: any) {
+    console.log(error);
+    this.error = true;
+    if (error.status === 0) {
+      // If status is 0, the backend is probably down
+      this.errorMessage = 'The backend seems not to be reachable';
+    } else if (error.error.message === 'No message available') {
+      // If no detailed error message is provided, fall back to the simple error name
+      this.errorMessage = error.error.error;
+    } else {
+      this.errorMessage = error.error.message;
+    }
+  }
+
+}

frontend/wendys-friends/src/app/dto/owner.ts

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+export class Owner {
+  constructor(
+    public id: number,
+    public name: string) {
+  }
+}

frontend/wendys-friends/src/app/global/globals.ts

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+import {Injectable} from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class Globals {
+  readonly backendUri: string = 'http://localhost:8080/';
+}

frontend/wendys-friends/src/app/service/owner.service.ts

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+import {Injectable} from '@angular/core';
+import {HttpClient} from '@angular/common/http';
+import {Globals} from '../global/globals';
+import {Observable} from 'rxjs';
+import {Owner} from '../dto/owner';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class OwnerService {
+
+  private messageBaseUri: string = this.globals.backendUri + '/owners';
+
+  constructor(private httpClient: HttpClient, private globals: Globals) {
+  }
+
+  /**
+   * Loads specific owner from the backend
+   * @param id of owner to load
+   */
+  getOwnerById(id: number): Observable<Owner> {
+    console.log('Load owner details for ' + id);
+    return this.httpClient.get<Owner>(this.messageBaseUri + '/' + id);
+  }
+
+}

frontend/wendys-friends/src/environments/environment.prod.ts

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+export const environment = {
+  production: true
+};

frontend/wendys-friends/src/environments/environment.ts

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+// This file can be replaced during build by using the `fileReplacements` array.
+// `ng build --prod` replaces `environment.ts` with `environment.prod.ts`.
+// The list of file replacements can be found in `angular.json`.
+
+export const environment = {
+  production: false
+};
+
+/*
+ * For easier debugging in development mode, you can import the following file
+ * to ignore zone related error stack frames such as `zone.run`, `zoneDelegate.invokeTask`.
+ *
+ * This import should be commented out in production mode because it will have a negative impact
+ * on performance if an error is thrown.
+ */
+// import 'zone.js/dist/zone-error';  // Included with Angular CLI.

frontend/wendys-friends/src/index.html

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+<!doctype html>
+<html lang="en">
+<head>
+  <meta charset="utf-8">
+  <title>WendysFriends</title>
+  <base href="/">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="icon" type="image/x-icon" href="favicon.ico">
+</head>
+<body>
+  <app-root></app-root>
+</body>
+</html>

frontend/wendys-friends/src/main.ts

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+import { enableProdMode } from '@angular/core';
+import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
+
+import { AppModule } from './app/app.module';
+import { environment } from './environments/environment';
+
+if (environment.production) {
+  enableProdMode();
+}
+
+platformBrowserDynamic().bootstrapModule(AppModule)
+  .catch(err => console.error(err));

frontend/wendys-friends/src/polyfills.ts

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+/***************************************************************************************************
+ * Load `$localize` onto the global scope - used if i18n tags appear in Angular templates.
+ */
+import '@angular/localize/init';
+/**
+ * This file includes polyfills needed by Angular and is loaded before the app.
+ * You can add your own extra polyfills to this file.
+ *
+ * This file is divided into 2 sections:
+ *   1. Browser polyfills. These are applied before loading ZoneJS and are sorted by browsers.
+ *   2. Application imports. Files imported after ZoneJS that should be loaded before your main
+ *      file.
+ *
+ * The current setup is for so-called "evergreen" browsers; the last versions of browsers that
+ * automatically update themselves. This includes Safari >= 10, Chrome >= 55 (including Opera),
+ * Edge >= 13 on the desktop, and iOS 10 and Chrome on mobile.
+ *
+ * Learn more in https://angular.io/guide/browser-support
+ */
+
+/***************************************************************************************************
+ * BROWSER POLYFILLS
+ */
+
+/** IE10 and IE11 requires the following for NgClass support on SVG elements */
+// import 'classlist.js';  // Run `npm install --save classlist.js`.
+
+/**
+ * Web Animations `@angular/platform-browser/animations`
+ * Only required if AnimationBuilder is used within the application and using IE/Edge or Safari.
+ * Standard animation support in Angular DOES NOT require any polyfills (as of Angular 6.0).
+ */
+// import 'web-animations-js';  // Run `npm install --save web-animations-js`.
+
+/**
+ * By default, zone.js will patch all possible macroTask and DomEvents
+ * user can disable parts of macroTask/DomEvents patch by setting following flags
+ * because those flags need to be set before `zone.js` being loaded, and webpack
+ * will put import in the top of bundle, so user need to create a separate file
+ * in this directory (for example: zone-flags.ts), and put the following flags
+ * into that file, and then add the following code before importing zone.js.
+ * import './zone-flags.ts';
+ *
+ * The flags allowed in zone-flags.ts are listed here.
+ *
+ * The following flags will work for all browsers.
+ *
+ * (window as any).__Zone_disable_requestAnimationFrame = true; // disable patch requestAnimationFrame
+ * (window as any).__Zone_disable_on_property = true; // disable patch onProperty such as onclick
+ * (window as any).__zone_symbol__UNPATCHED_EVENTS = ['scroll', 'mousemove']; // disable patch specified eventNames
+ *
+ *  in IE/Edge developer tools, the addEventListener will also be wrapped by zone.js
+ *  with the following flag, it will bypass `zone.js` patch for IE/Edge
+ *
+ *  (window as any).__Zone_enable_cross_context_check = true;
+ *
+ */
+
+/***************************************************************************************************
+ * Zone JS is required by default for Angular itself.
+ */
+import 'zone.js/dist/zone';  // Included with Angular CLI.
+
+
+/***************************************************************************************************
+ * APPLICATION IMPORTS
+ */

frontend/wendys-friends/src/styles.scss

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+/* You can add global styles to this file, and also import other style files */

frontend/wendys-friends/src/test.ts

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+// This file is required by karma.conf.js and loads recursively all the .spec and framework files
+
+import 'zone.js/dist/zone-testing';
+import { getTestBed } from '@angular/core/testing';
+import {
+  BrowserDynamicTestingModule,
+  platformBrowserDynamicTesting
+} from '@angular/platform-browser-dynamic/testing';
+
+declare const require: any;
+
+// First, initialize the Angular testing environment.
+getTestBed().initTestEnvironment(
+  BrowserDynamicTestingModule,
+  platformBrowserDynamicTesting()
+);
+// Then we find all the tests.
+const context = require.context('./', true, /\.spec\.ts$/);
+// And load the modules.
+context.keys().map(context);