initial commit

- contains basic chat via websocket
- contains button to test websocket
- contains button to test rest api

src/app/app-routing.module.ts

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

src/app/app.component.css

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+:host {
+  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
+  font-size: 14px;
+  color: #333;
+  box-sizing: border-box;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+svg.material-icons {
+  height: 24px;
+  width: auto;
+}
+
+svg.material-icons:not(:last-child) {
+  margin-right: 8px;
+}
+
+.card svg.material-icons path {
+  fill: #888;
+}
+
+.card-container {
+  display: flex;
+  flex-wrap: wrap;
+  justify-content: center;
+  /* margin-top: 16px; */
+}
+
+.card {
+  border-radius: 4px;
+  border: 1px solid #eee;
+  background-color: #fafafa;
+  height: 40px;
+  width: 200px;
+  margin: 0 8px 16px;
+  padding: 16px;
+  display: flex;
+  flex-direction: row;
+  justify-content: center;
+  align-items: center;
+  transition: all 0.2s ease-in-out;
+  line-height: 24px;
+}
+
+.card-container .card:not(:last-child) {
+  margin-right: 0;
+}
+
+.card.card-small {
+  height: 16px;
+  width: 168px;
+}
+
+.card-container .card:not(.highlight-card) {
+  cursor: pointer;
+}
+
+.card-container .card:not(.highlight-card):hover {
+  transform: translateY(-3px);
+  box-shadow: 0 4px 17px rgba(0, 0, 0, 0.35);
+}
+
+.card-container .card:not(.highlight-card):hover .material-icons path {
+  fill: rgb(105, 103, 103);
+}
+
+.card.highlight-card {
+  background-color: #1976d2;
+  color: white;
+  font-weight: 600;
+  border: none;
+  width: auto;
+  min-width: 30%;
+  position: relative;
+}
+
+.card.card.highlight-card span {
+  margin-left: 60px;
+}
+
+/* Responsive Styles */
+@media screen and (max-width: 767px) {
+
+  .card:not(.highlight-card) {
+    height: 16px;
+    margin: 8px 0;
+  }
+
+  .card.highlight-card span {
+    margin-left: 72px;
+  }
+
+}
+
+.chat {
+  float: right;
+  height: 100%;
+  width: 20%;
+  background-color: goldenrod;
+}

src/app/app.component.html

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+<div class="chat">
+  <app-chat></app-chat>
+</div>
+
+<div>
+  <div class="card-container">
+    <div class="card card-small" (click)="onClickSocket()" tabindex="0">
+      <svg class="material-icons" xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path d="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/></svg>
+
+      <span>Send test message</span>
+    </div>
+
+    <div class="card card-small" (click)="onClickApi()" tabindex="0">
+      <svg class="material-icons" xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path d="M19 13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/></svg>
+
+      <span>Call rest api</span>
+    </div>
+  </div>
+</div>
+<router-outlet></router-outlet>

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.componentInstance;
+    expect(app).toBeTruthy();
+  });
+
+  it(`should have as title 'rona-frontend'`, () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    const app = fixture.componentInstance;
+    expect(app.title).toEqual('rona-frontend');
+  });
+
+  it('should render title', () => {
+    const fixture = TestBed.createComponent(AppComponent);
+    fixture.detectChanges();
+    const compiled = fixture.nativeElement;
+    expect(compiled.querySelector('.content span').textContent).toContain('rona-frontend app is running!');
+  });
+});

src/app/app.component.ts

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+import { Component } from '@angular/core';
+import { SocketService } from './socket/socket.service';
+import { HttpClient } from '@angular/common/http';
+
+@Component({
+  selector: 'app-root',
+  templateUrl: './app.component.html',
+  styleUrls: ['./app.component.css']
+})
+export class AppComponent {
+  title = 'rona-frontend';
+
+  onClickSocket() {
+    this.socketService.send('test', {'user': 'USERNAME', 'payload': 'PAYLOAD TEST'})
+  }
+
+  onClickApi() {
+    this.httpService.get('http://localhost:5005/').subscribe(response => {
+      console.log('REST API call returned: ', response);
+    });
+  }
+
+  /**
+   *
+   * @param socketService
+   * @param httpService
+   */
+  constructor(private socketService: SocketService,
+              private httpService: HttpClient) { }
+
+}

src/app/app.module.ts

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+import { NgModule } from '@angular/core';
+import { BrowserModule } from '@angular/platform-browser';
+import { HttpClientModule } from '@angular/common/http';
+
+import { AppRoutingModule } from './app-routing.module';
+import { AppComponent } from './app.component';
+import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
+import { ChatComponent } from './chat/chat.component';
+import { EntryComponent } from './chat/entry/entry.component';
+import { InputComponent } from './chat/input/input.component';
+import {MatCardModule} from '@angular/material/card';
+import {MatInputModule} from '@angular/material/input';
+
+@NgModule({
+  declarations: [
+    AppComponent,
+    ChatComponent,
+    EntryComponent,
+    InputComponent
+  ],
+    imports: [
+        BrowserModule,
+        HttpClientModule,
+        AppRoutingModule,
+        BrowserAnimationsModule,
+        MatCardModule,
+        MatInputModule
+    ],
+  providers: [],
+  bootstrap: [AppComponent]
+})
+export class AppModule { }

src/app/chat/chat.component.css

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+#chat-log {
+  height: calc(99% - 34px);
+  overflow-y: scroll;
+}

src/app/chat/chat.component.html

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+<div id="chat-log">
+  <app-entry *ngFor="let entry of entries"
+             [entry]=entry>
+  </app-entry>
+</div>
+
+<app-input></app-input>

src/app/chat/chat.component.spec.ts

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

src/app/chat/chat.component.ts

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+import { Component, OnInit } from '@angular/core';
+import { Entry } from './entry/entry';
+import { Message } from './message';
+import {SocketService} from '../socket/socket.service';
+
+@Component({
+  selector: 'app-chat',
+  templateUrl: './chat.component.html',
+  styleUrls: ['./chat.component.css']
+})
+export class ChatComponent implements OnInit {
+
+  entries = new Array<Entry>();
+
+  public addMessage(message: Message): void {
+    if ((this.entries.length > 0)
+        && (this.entries[this.entries.length - 1].character == message.sender)) {
+      this.entries[this.entries.length - 1].messages.push(message.message);
+    } else {
+      this.entries.push(new Entry(message.sender, 'Aangular User', message.message));
+    }
+    window.setTimeout(ChatComponent.scrollToBottom, 5);
+  }
+
+  static scrollToBottom() {
+    const chatLog = document.getElementById('chat-log');
+    chatLog.scrollTop = chatLog.scrollHeight;
+  }
+
+  constructor(private socketService: SocketService) {
+    socketService.onTestMessage().subscribe((message: Message) => {
+      console.log(message);
+      this.addMessage(message);
+    });
+  }
+
+  ngOnInit(): void {
+  }
+
+}

src/app/chat/entry/entry.component.css

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+.avatar {
+  background-image: url(src/assets/avatar.png);
+  background-size: cover;
+}
+
+.character {
+  font-size: 16px;
+  font-weight: bold;
+}
+
+.header {
+  margin-bottom: -8px;
+  width: 100%;
+}
+
+/* this class is wrapped around header text by angular */
+/deep/ .mat-card-header-text {
+  width: 100%;
+}
+
+.messages {
+  /* margin-left: 4px; */
+}
+
+.timestamp {
+  color: #888888;
+  float: right;
+  font-weight: normal;
+  font-size: 14px;
+}
+
+.user {
+  font-size: 14px;
+}
+

src/app/chat/entry/entry.component.html

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+<mat-card>
+  <mat-card-header class="header">
+    <div mat-card-avatar class="avatar"></div>
+    <mat-card-title class="character">
+      {{entry.character}}
+      <div class="timestamp">23:31</div>
+    </mat-card-title>
+    <mat-card-subtitle class="user">played by {{entry.user}}</mat-card-subtitle>
+  </mat-card-header>
+  <mat-card-content>
+    <div class="messages" *ngFor="let message of entry.messages">
+      {{message}}
+    </div>
+  </mat-card-content>
+</mat-card>

src/app/chat/entry/entry.component.spec.ts

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

src/app/chat/entry/entry.component.ts

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+import { Component, Input, OnInit } from '@angular/core';
+import { Entry } from './entry';
+
+@Component({
+  selector: 'app-entry',
+  templateUrl: './entry.component.html',
+  styleUrls: ['./entry.component.css']
+})
+export class EntryComponent implements OnInit {
+
+  @Input() entry: Entry;
+
+  constructor() { }
+
+  ngOnInit(): void {
+  }
+
+}

src/app/chat/entry/entry.spec.ts

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+import { Entry } from './entry';
+
+describe('Entry', () => {
+  it('should create an instance', () => {
+    expect(new Entry()).toBeTruthy();
+  });
+});

src/app/chat/entry/entry.ts

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+export class Entry {
+
+  public messages: Array<string> = new Array<string>();
+
+  constructor(public character: string,
+              public user: string,
+              message: string) {
+    this.messages.push(message);
+  }
+}

src/app/chat/input/input.component.css

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+#chat-input {
+  box-sizing: border-box;
+  height: 34px;
+  width: 100%;
+  margin-top: 1%;
+}

src/app/chat/input/input.component.html

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+<input id="chat-input"
+       matInput
+       placeholder="Type here."
+       #box
+       (keyup.Enter)="onEnter(box.value); box.value=''">

src/app/chat/input/input.component.spec.ts

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

src/app/chat/input/input.component.ts

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+import { Component, OnInit } from '@angular/core';
+import {SocketService} from '../../socket/socket.service';
+import {Message} from '../message';
+import {Events} from '../../socket/events-enum';
+
+@Component({
+  selector: 'app-input',
+  templateUrl: './input.component.html',
+  styleUrls: ['./input.component.css']
+})
+export class InputComponent implements OnInit {
+
+  onEnter(value: string): void {
+    const message = new Message('Aangular Frontend', value);
+    this.socketService.send(Events.publicMessage, message);
+  }
+
+  constructor(private socketService: SocketService) { }
+
+  ngOnInit(): void {
+  }
+
+}

src/app/chat/message.spec.ts

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+import { Message } from './message';
+
+describe('Message', () => {
+  it('should create an instance', () => {
+    expect(new Message()).toBeTruthy();
+  });
+});

src/app/chat/message.ts

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+export class Message {
+
+  constructor(public sender: string,
+              public message: string) {
+
+  }
+}

src/app/socket/events-enum.ts

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+export enum Events {
+  publicMessage = 'public message'
+}

src/app/socket/socket.service.spec.ts

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+import { TestBed } from '@angular/core/testing';
+
+import { SocketService } from './socket.service';
+
+describe('WebsocketService', () => {
+  let service: SocketService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(SocketService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

src/app/socket/socket.service.ts

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+import { Injectable, OnInit } from '@angular/core';
+import { Observable } from 'rxjs';
+import * as socketIo from 'socket.io-client';
+
+import { Events } from './events-enum';
+
+const SERVER_URL = 'http://localhost:5005'
+
+
+@Injectable({
+  providedIn: 'root'
+})
+export class SocketService implements OnInit {
+  private socket;
+
+  public initSocket(): void {
+    this.socket = socketIo(SERVER_URL);
+
+    this.socket.on('connect_error', (error) => {
+      this.socket.close();
+      throw error;
+    });
+  }
+
+  public send(event: string, message: any): void {
+    this.socket.emit(event, message);
+  }
+
+  public onTestMessage(): Observable<any> {
+    return new Observable<any>(observer => {
+      this.socket.on(Events.publicMessage, (data) => observer.next(data));
+    });
+  }
+
+  constructor() {
+    this.initSocket();
+  }
+
+  ngOnInit(): void { }
+}