Added Navigation

src/app/app-routing.module.ts

@@ -1,7 +1,15 @@
 import { NgModule } from '@angular/core';
 import { RouterModule, Routes } from '@angular/router';
+import { DashboardComponent } from './dashboard/dashboard.component';
+import { HeroDetailComponent } from './hero-detail/hero-detail.component';
+import { HeroesComponent } from './heroes/heroes.component';
 
-const routes: Routes = [];
+const routes: Routes = [
+  {path: 'heroes', component: HeroesComponent},
+  {path: 'dashboard', component: DashboardComponent},
+  {path: 'detail/:id', component: HeroDetailComponent},
+  {path: '', redirectTo: '/dashboard', pathMatch: 'full'},
+];
 
 @NgModule({
   imports: [RouterModule.forRoot(routes)],

src/app/app.component.html

@@ -1,3 +1,7 @@
 <h1>{{ title }}</h1>
-<app-heroes></app-heroes>
+<nav>
+    <a routerLink="/dashboard">Dashboard</a>
+    <a routerLink="/heroes">Heroes</a>
+</nav>
+<router-outlet></router-outlet>
 <app-messages></app-messages>

src/app/app.component.scss

@@ -0,0 +1,21 @@
+/* AppComponent's private CSS styles */
+h1 {
+    margin-bottom: 0;
+  }
+  nav a {
+    padding: 1rem;
+    text-decoration: none;
+    margin-top: 10px;
+    display: inline-block;
+    background-color: #e8e8e8;
+    color: #3d3d3d;
+    border-radius: 4px;
+  }
+  
+  nav a:hover {
+    color: white;
+    background-color: #42545C;
+  }
+  nav a:active {
+    background-color: black;
+  }

src/app/app.module.ts

@@ -7,13 +7,15 @@ import { AppComponent } from './app.component';
 import { HeroesComponent } from './heroes/heroes.component';
 import { HeroDetailComponent } from './hero-detail/hero-detail.component';
 import { MessagesComponent } from './messages/messages.component';
+import { DashboardComponent } from './dashboard/dashboard.component';
 
 @NgModule({
   declarations: [
     AppComponent,
     HeroesComponent,
     HeroDetailComponent,
-    MessagesComponent
+    MessagesComponent,
+    DashboardComponent
   ],
   imports: [
     BrowserModule,

src/app/dashboard/dashboard.component.html

@@ -0,0 +1,6 @@
+<h2>Top Heroes</h2>
+<div class="heroes-menu">
+    <a *ngFor="let hero of heroes" routerLink="/detail/{{hero.id}}">
+        {{hero.name}}
+    </a>
+</div>

src/app/dashboard/dashboard.component.scss

@@ -0,0 +1,50 @@
+/* DashboardComponent's private CSS styles */
+
+h2 {
+    text-align: center;
+  }
+  
+  .heroes-menu {
+    padding: 0;
+    margin: auto;
+    max-width: 1000px;
+  
+    /* flexbox */
+    display: flex;
+    flex-direction: row;
+    flex-wrap: wrap;
+    justify-content: space-around;
+    align-content: flex-start;
+    align-items: flex-start;
+  }
+  
+  a {
+    background-color: #3f525c;
+    border-radius: 2px;
+    padding: 1rem;
+    font-size: 1.2rem;
+    text-decoration: none;
+    display: inline-block;
+    color: #fff;
+    text-align: center;
+    width: 100%;
+    min-width: 70px;
+    margin: .5rem auto;
+    box-sizing: border-box;
+  
+    /* flexbox */
+    order: 0;
+    flex: 0 1 auto;
+    align-self: auto;
+  }
+  
+  @media (min-width: 600px) {
+    a {
+      width: 18%;
+      box-sizing: content-box;
+    }
+  }
+  
+  a:hover {
+    background-color: #000;
+  }

src/app/dashboard/dashboard.component.spec.ts

@@ -0,0 +1,23 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { DashboardComponent } from './dashboard.component';
+
+describe('DashboardComponent', () => {
+  let component: DashboardComponent;
+  let fixture: ComponentFixture<DashboardComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      declarations: [ DashboardComponent ]
+    })
+    .compileComponents();
+
+    fixture = TestBed.createComponent(DashboardComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/dashboard/dashboard.component.ts

@@ -0,0 +1,23 @@
+import { Component, OnInit } from '@angular/core';
+import { Hero } from '../hero';
+import { HeroService } from '../hero.service';
+
+@Component({
+  selector: 'app-dashboard',
+  templateUrl: './dashboard.component.html',
+  styleUrls: ['./dashboard.component.scss']
+})
+export class DashboardComponent implements OnInit {
+  heroes: Hero[] = []
+
+  constructor(private heroService: HeroService) { }
+
+  ngOnInit(): void {
+    this.getHeroes()
+  }
+
+  getHeroes(): void {
+    this.heroService.getHeroes().subscribe(heroes => this.heroes = heroes.slice(1,5))
+  }
+
+}

src/app/hero-detail/hero-detail.component.html

@@ -1,8 +1,9 @@
 <div *ngIf="hero">
-    <h2>{{hero.name | uppercase}}</h2>
+    <h2>{{hero.name | uppercase}} Details</h2>
     <div>id: {{hero.id}}</div>
     <div>
         <label for="hero-name">Hero name: </label>
         <input id="hero-name" [(ngModel)]="hero.name" placeholder="name">
     </div>
+    <button type="button" (click)="goBack()">go back</button>
 </div>

src/app/hero-detail/hero-detail.component.scss

@@ -0,0 +1,24 @@
+/* HeroDetailComponent's private CSS styles */
+label {
+    color: #435960;
+    font-weight: bold;
+  }
+  input {
+    font-size: 1em;
+    padding: .5rem;
+  }
+  button {
+    margin-top: 20px;
+    background-color: #eee;
+    padding: 1rem;
+    border-radius: 4px;
+    font-size: 1rem;
+  }
+  button:hover {
+    background-color: #cfd8dc;
+  }
+  button:disabled {
+    background-color: #eee;
+    color: #ccc;
+    cursor: auto;
+  }

src/app/hero-detail/hero-detail.component.ts

@@ -1,5 +1,8 @@
-import { Component, OnInit,Input } from '@angular/core';
+import { Component, OnInit } from '@angular/core';
+import { Location } from '@angular/common';
+import { ActivatedRoute } from '@angular/router';
 import { Hero } from '../hero';
+import { HeroService } from '../hero.service';
 
 @Component({
   selector: 'app-hero-detail',
@@ -7,12 +10,26 @@ import { Hero } from '../hero';
   styleUrls: ['./hero-detail.component.scss']
 })
 export class HeroDetailComponent implements OnInit {
-
-  @Input() hero?: Hero
+  hero: Hero | undefined
   
-  constructor() { }
+  constructor(
+    private route: ActivatedRoute,
+    private location: Location,
+    private heroService: HeroService,
+  ) { }
 
   ngOnInit(): void {
+    this.getHero()
+  }
+
+  getHero(): void {
+    const id = Number(this.route.snapshot.paramMap.get('id'));
+    this.heroService.getHero(id)
+      .subscribe(hero => this.hero = hero);
+  }
+
+  goBack(): void {
+    this.location.back()
   }
 
 }

src/app/hero.service.ts

@@ -16,4 +16,10 @@ export class HeroService {
     this.messageService.add('HeroService: Heroes fetched!')
     return heroes
   }
+
+  getHero(id: number): Observable<Hero> {
+    const hero = HEROES.find(h => h.id === id)!
+    this.messageService.add(`HeroService: fetched hero id=${id}`)
+    return of(hero)
+  }
 }

src/app/heroes/heroes.component.html

@@ -1,10 +1,8 @@
 <h2>Heroes</h2>
 <ul class="heroes">
     <li *ngFor="let hero of heroes">
-        <button [class.selected]="hero === selectedHero" type="button" (click)="onSelect(hero)" class="button">
-            <span class="badge">{{hero.id}}</span>
-            <span class="name">{{hero.name}}</span>
-        </button>
+        <a routerLink="/detail/{{hero.id}}">
+            <span class="badge">{{hero.id}}</span>{{hero.name}}
+        </a>
     </li>
-</ul>
-<app-hero-detail [hero]="selectedHero"></app-hero-detail>
+</ul>

src/app/heroes/heroes.component.scss

@@ -1,66 +1,54 @@
 /* HeroesComponent's private CSS styles */
 .heroes {
-    margin: 0 0 2em 0;
-    list-style-type: none;
-    padding: 0;
-    width: 15em;
-  }
-  
-  .heroes li {
-    display: flex;
-  }
-  
-  .heroes button {
-    flex: 1;
-    cursor: pointer;
-    position: relative;
-    left: 0;
-    background-color: #EEE;
-    margin: .5em;
-    padding: 0;
-    border-radius: 4px;
-    display: flex;
-    align-items: stretch;
-    height: 1.8em;
-  }
-  
-  .heroes button:hover {
-    color: #2c3a41;
-    background-color: #e6e6e6;
-    left: .1em;
-  }
-  
-  .heroes button:active {
-    background-color: #525252;
-    color: #fafafa;
-  }
-  
-  .heroes button.selected {
-    background-color: black;
-    color: white;
-  }
-  
-  .heroes button.selected:hover {
-    background-color: #505050;
-    color: white;
-  }
-  
-  .heroes button.selected:active {
-    background-color: black;
-    color: white;
-  }
-  
-  .heroes .badge {
-    display: inline-block;
-    font-size: small;
-    color: white;
-    padding: 0.8em 0.7em 0 0.7em;
-    background-color: #405061;
-    line-height: 1em;
-    margin-right: .8em;
-    border-radius: 4px 0 0 4px;
-  }
-  
-  .heroes .name {
-    align-self: center;
-  }
+  margin: 0 0 2em 0;
+  list-style-type: none;
+  padding: 0;
+  width: 15em;
+}
+.heroes li {
+  position: relative;
+  cursor: pointer;
+}
+
+.heroes li:hover {
+  left: .1em;
+}
+
+.heroes a {
+  color: #333;
+  text-decoration: none;
+  background-color: #EEE;
+  margin: .5em;
+  padding: .3em 0;
+  height: 1.6em;
+  border-radius: 4px;
+  display: block;
+  width: 100%;
+}
+
+.heroes a:hover {
+  color: #2c3a41;
+  background-color: #e6e6e6;
+}
+
+.heroes a:active {
+  background-color: #525252;
+  color: #fafafa;
+}
+
+.heroes .badge {
+  display: inline-block;
+  font-size: small;
+  color: white;
+  padding: 0.8em 0.7em 0 0.7em;
+  background-color: #405061;
+  line-height: 1em;
+  position: relative;
+  left: -1px;
+  top: -4px;
+  height: 1.8em;
+  min-width: 16px;
+  text-align: right;
+  margin-right: .8em;
+  border-radius: 4px 0 0 4px;
+}

src/app/heroes/heroes.component.ts

@@ -12,13 +12,6 @@ export class HeroesComponent implements OnInit {
 
   constructor(private heroService: HeroService, private messageService: MessageService) { }
 
-  selectedHero?: Hero
-
-  onSelect(hero: Hero): void {
-    this.selectedHero = hero
-    this.messageService.add(`Hero Component: Selected hero id=${hero.id}`)
-  }
-
   heroes: Hero[] = []
 
   ngOnInit(): void {