Angular 2 - V.3 Router Lazy Loading

import { Component }         from '@angular/core';
import { ROUTER_DIRECTIVES } from '@angular/router';

import { DialogService } from './dialog.service';
import { HeroService }   from './heroes/hero.service';

@Component({
  selector: 'my-app',
  template: `
    <h1 class="title">Component Router</h1>
    <nav>
      <a [routerLink]="['/crisis-center']">Crisis Center</a>
      <a [routerLink]="['/heroes']">Heroes</a>
    </nav>
    <router-outlet></router-outlet>
  `,
  providers: [
    DialogService,
    HeroService
  ],
  directives: [ROUTER_DIRECTIVES]
})
export class AppComponent { }


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

import { provideRouter, RouterConfig } from '@angular/router';

import { CrisisCenterRoutes } from './crisis-center/crisis-center.routes';
import { CrisisDetailGuard }  from './crisis-center/crisis-detail.guard';
import { HeroesRoutes }       from './heroes/heroes.routes';

// Use SystemJSResolver for lazy loading
import {ComponentResolver,
        SystemJsComponentResolver} from '@angular/core';
import {RuntimeCompiler} from '@angular/compiler';

const routes: RouterConfig = [
  ...HeroesRoutes,
  ...CrisisCenterRoutes
];

export const APP_ROUTER_PROVIDERS = [
  provideRouter(routes),
  CrisisDetailGuard,
  {
    provide: ComponentResolver,
    useFactory: (compiler) => new SystemJsComponentResolver(compiler),
    deps: [RuntimeCompiler]
  }
];


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

import { Component }         from '@angular/core';
import { ROUTER_DIRECTIVES } from '@angular/router';
import { CrisisService }     from './crisis.service';

@Component({
  template:  `
    <h2>CRISIS CENTER</h2>
    <router-outlet></router-outlet>
  `,
  directives: [ROUTER_DIRECTIVES],
  providers:  [CrisisService]
})

export default class CrisisCenterComponent { }


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

//import { CrisisDetailComponent } from './crisis-detail.component';
//import { CrisisListComponent }   from './crisis-list.component';
//import { CrisisCenterComponent } from './crisis-center.component';
import { CrisisDetailGuard }     from './crisis-detail.guard';

export const CrisisCenterRoutes = [
  {
    path: 'crisis-center',
    component: 'app/crisis-center/crisis-center.component',
    children: [
      { path: '', component: 'app/crisis-center/crisis-list.component' },
      { path: ':id', component: 'app/crisis-center/crisis-detail.component', canDeactivate: [CrisisDetailGuard] }
    ]
  }
];


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

import { Component, OnInit, OnDestroy } from '@angular/core';
import { Router, ActivatedRoute }       from '@angular/router';
import { Observable }                   from 'rxjs/Observable';
import 'rxjs/add/observable/fromPromise';

import { Crisis, CrisisService } from './crisis.service';
import { DialogService }         from '../dialog.service';

@Component({
  template: `
  <div *ngIf="crisis">
    <h3>"{{editName}}"</h3>
    <div>
      <label>Id: </label>{{crisis.id}}</div>
    <div>
      <label>Name: </label>
      <input [(ngModel)]="editName" placeholder="name"/>
    </div>
    <p>
      <button (click)="save()">Save</button>
      <button (click)="cancel()">Cancel</button>
    </p>
  </div>
  `,
  styles: ['input {width: 20em}']
})

export default class CrisisDetailComponent implements OnInit, OnDestroy {
  crisis: Crisis;
  editName: string;
  private sub: any;

  constructor(
    private service: CrisisService,
    private router: Router,
    private route: ActivatedRoute,
    private dialogService: DialogService
    ) { }

  ngOnInit() {
    this.sub = this.route
      .params
      .subscribe(params => {
        let id = +params['id'];
        this.service.getCrisis(id)
          .then(crisis => {
            if (crisis) {
              this.editName = crisis.name;
              this.crisis = crisis;
            } else { // id not found
              this.gotoCrises();
            }
          });
      });
  }

  ngOnDestroy() {
    this.sub.unsubscribe();
  }

  cancel() {
    this.editName = this.crisis.name;
    this.gotoCrises();
  }

  save() {
    this.crisis.name = this.editName;
    this.gotoCrises();
  }

  gotoCrises() {
    let crisisId = this.crisis ? this.crisis.id : null;
    // Pass along the hero id if available
    // so that the CrisisListComponent can select that hero.
    // Add a totally useless `foo` parameter for kicks.
    this.router.navigate(['/crisis-center', { id: crisisId, foo: 'foo' }], { relativeTo: this.route });
  }

  canDeactivate(): Observable<boolean> | boolean {
    // Allow synchronous navigation (`true`) if no crisis or the crisis is unchanged
    if (!this.crisis || this.crisis.name === this.editName) {
      return true;
    }
    // Otherwise ask the user with the dialog service and return its
    // promise which resolves to true or false when the user decides
    let p = this.dialogService.confirm('Discard changes?');
    let o = Observable.fromPromise(p);
    return o;
  }
}


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

import { Injectable }    from '@angular/core';
import { CanDeactivate } from '@angular/router';
import { Observable }    from 'rxjs/Observable';

import { CrisisDetailComponent } from './crisis-detail.component';

@Injectable()
export class CrisisDetailGuard implements CanDeactivate<CrisisDetailComponent> {

  canDeactivate(component: CrisisDetailComponent): Observable<boolean> | boolean {
    return component.canDeactivate();
  }
}


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

import { Component, OnInit, OnDestroy } from '@angular/core';
import { Router, ActivatedRoute }       from '@angular/router';

import { Crisis, CrisisService } from './crisis.service';

@Component({
  template: `
    <ul class="items">
      <li *ngFor="let crisis of crises"
        [class.selected]="isSelected(crisis)"
        (click)="onSelect(crisis)">
        <span class="badge">{{crisis.id}}</span> {{crisis.name}}
      </li>
    </ul>
  `,
})
export default class CrisisListComponent implements OnInit, OnDestroy {
  crises: Crisis[];
  private selectedId: number;
  sub: any;

  constructor(
    private service: CrisisService,
    private router: Router,
    private route: ActivatedRoute) { }

  isSelected(crisis: Crisis) { return crisis.id === this.selectedId; }

  ngOnInit() {
    this.sub = this.route
      .params
      .subscribe(params => {
        this.selectedId = +params['id'];
        this.service.getCrises()
          .then(crises => this.crises = crises);
      });
  }

  ngOnDestroy() {
    this.sub.unsubscribe();
  }

  onSelect(crisis: Crisis) {
    // Navigate with absolute link
     this.router.navigate(['/crisis-center', crisis.id]);
  }
}


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

/// TODO: Clean this up
export class Crisis {
  constructor(public id: number, public name: string) { }
}

const CRISES = [
  new Crisis(1, 'Dragon Burning Cities'),
  new Crisis(2, 'Sky Rains Great White Sharks'),
  new Crisis(3, 'Giant Asteroid Heading For Earth'),
  new Crisis(4, 'Procrastinators Meeting Delayed Again'),
];

let crisesPromise = Promise.resolve(CRISES);

///////////

import { Injectable } from '@angular/core';

@Injectable()
export class CrisisService {

  static nextCrisisId = 100;

  getCrises() { return crisesPromise; }

  getCrisis(id: number | string) {
    return crisesPromise
      .then(crises => crises.filter(c => c.id === +id)[0]);
  }

  addCrisis(name: string) {
    name = name.trim();
    if (name) {
      let crisis = new Crisis(CrisisService.nextCrisisId++, name);
      crisesPromise.then(crises => crises.push(crisis));
    }
  }
}


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

import { Injectable } from '@angular/core';
/**
 * Async modal dialog service
 * DialogService makes this app easier to test by faking this service.
 * TODO: better modal implemenation that doesn't use window.confirm
 */
@Injectable()
export class DialogService {
  /**
   * Ask user to confirm an action. `message` explains the action and choices.
   * Returns promise resolving to `true`=confirm or `false`=cancel
   */
  confirm(message?: string): Promise<boolean> {
    return new Promise<boolean>(resolve => {
      setTimeout(() => {
        let ok = window.confirm(message || 'Is it OK?') ;
        return resolve(ok);
        },  0);
    })
    // Todo: good during development; delete
    .then(ok => {
      console.log('confirm said: ' + ok);
      return ok;
    });
  }
}


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

import { Component, OnInit, OnDestroy } from '@angular/core';
import { ActivatedRoute, Router } from '@angular/router';

import { Hero, HeroService } from './hero.service';

@Component({
  template: `
  <h2>HEROES</h2>
  <div *ngIf="hero">
    <h3>"{{hero.name}}"</h3>
    <div>
      <label>Id: </label>{{hero.id}}</div>
    <div>
      <label>Name: </label>
      <input [(ngModel)]="hero.name" placeholder="name"/>
    </div>
    <p>
      <button (click)="gotoHeroes()">Back</button>
    </p>
  </div>
  `,
})
export default class HeroDetailComponent implements OnInit, OnDestroy {
  hero: Hero;
  sub: any;

  constructor(
    private router: Router,
    private route: ActivatedRoute,
    private service: HeroService) {}

  ngOnInit() {
    this.sub = this.route
      .params
      .subscribe(params => {
        let id = +params['id'];
        this.service.getHero(id)
          .then(hero => this.hero = hero);
      });
  }

  ngOnDestroy() {
    this.sub.unsubscribe();
  }

  gotoHeroes() {
    let heroId = this.hero ? this.hero.id : null;
    // Pass along the hero id if available
    // so that the HeroList component can select that hero.
    // Add a totally useless `foo` parameter for kicks.
    this.router.navigate(['/heroes'], { queryParams: { id: `${heroId}`, foo: 'foo' } });
  }
}


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

import { Component, OnInit, OnDestroy } from '@angular/core';
import { Router, ActivatedRoute } from '@angular/router';

import { Hero, HeroService}   from './hero.service';

@Component({
  template: `
    <h2>HEROES</h2>
    <ul class="items">
      <li *ngFor="let hero of heroes"
        [class.selected]="isSelected(hero)"
        (click)="onSelect(hero)">
        <span class="badge">{{hero.id}}</span> {{hero.name}}
      </li>
    </ul>
  `
})
export default class HeroListComponent implements OnInit, OnDestroy {
  heroes: Hero[];
  sub: any;

  private selectedId: number;

  constructor(
    private service: HeroService,
    private router: Router,
    private route: ActivatedRoute) {}

  ngOnInit() {
    this.sub = this.router
      .routerState
      .queryParams
      .subscribe(params => {
        this.selectedId = +params['id'];
        this.service.getHeroes()
          .then(heroes => this.heroes = heroes);
      });
  }

  ngOnDestroy() {
    this.sub.unsubscribe();
  }

  isSelected(hero: Hero) { return hero.id === this.selectedId; }

  onSelect(hero: Hero) {
    this.router.navigate(['/hero', hero.id]);
  }

}


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

import {Injectable} from '@angular/core';

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

let HEROES = [
  new Hero(11, 'Mr. Nice'),
  new Hero(12, 'Narco'),
  new Hero(13, 'Bombasto'),
  new Hero(14, 'Celeritas'),
  new Hero(15, 'Magneta'),
  new Hero(16, 'RubberMan')
];

let heroesPromise = Promise.resolve(HEROES);

@Injectable()
export class HeroService {
  getHeroes() { return heroesPromise; }

  getHero(id: number | string) {
    return heroesPromise
      .then(heroes => heroes.filter(h => h.id === +id)[0]);
  }
}


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

//import { HeroListComponent }     from './hero-list.component';
//import { HeroDetailComponent }   from './hero-detail.component';

export const HeroesRoutes = [
  { path: 'heroes',  component: 'app/heroes/hero-list.component' },
  { path: 'hero/:id', component: 'app/heroes/hero-detail.component' }
];


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

// main entry point
import { bootstrap }            from '@angular/platform-browser-dynamic';
import { AppComponent }         from './app.component';
import { APP_ROUTER_PROVIDERS } from './app.routes';

// Extend Observable throughout the app
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/mergeMap';
import 'rxjs/add/observable/of';
import 'rxjs/add/operator/do';

bootstrap(AppComponent, [
  APP_ROUTER_PROVIDERS
])
.catch(err => console.error(err));


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

/* Master Styles */
h1 {
  color: #369; 
  font-family: Arial, Helvetica, sans-serif;   
  font-size: 250%;
}
h2, h3 { 
  color: #444;
  font-family: Arial, Helvetica, sans-serif;   
  font-weight: lighter;
}
body { 
  margin: 2em; 
}
body, input[text], button { 
  color: #888; 
  font-family: Cambria, Georgia; 
}
a {
  cursor: pointer;
  cursor: hand;
}
button {
  font-family: Arial;
  background-color: #eee;
  border: none;
  padding: 5px 10px;
  border-radius: 4px;
  cursor: pointer;
  cursor: hand;
}
button:hover {
  background-color: #cfd8dc;
}
button:disabled {
  background-color: #eee;
  color: #aaa; 
  cursor: auto;
}

/* Navigation link styles */
nav a {
  padding: 5px 10px;
  text-decoration: none;
  margin-top: 10px;
  display: inline-block;
  background-color: #eee;
  border-radius: 4px;
}
nav a:visited, a:link {
  color: #607D8B;
}
nav a:hover {
  color: #039be5;
  background-color: #CFD8DC;
}
nav a.router-link-active {
  color: #039be5;
}

/* items class */
.items {
  margin: 0 0 2em 0;
  list-style-type: none;
  padding: 0;
  width: 24em;
}
.items li {
  cursor: pointer;
  position: relative;
  left: 0;
  background-color: #EEE;
  margin: .5em;
  padding: .3em 0;
  height: 1.6em;
  border-radius: 4px;
}
.items li:hover {
  color: #607D8B;
  background-color: #DDD;
  left: .1em;
}
.items li.selected:hover {
  background-color: #BBD8DC;
  color: white;
}
.items .text {
  position: relative;
  top: -3px;
}
.items {
  margin: 0 0 2em 0;
  list-style-type: none;
  padding: 0;
  width: 24em;
}
.items li {
  cursor: pointer;
  position: relative;
  left: 0;
  background-color: #EEE;
  margin: .5em;
  padding: .3em 0;
  height: 1.6em;
  border-radius: 4px;
}
.items li:hover {
  color: #607D8B;
  background-color: #DDD;
  left: .1em;
}
.items li.selected {
  background-color: #CFD8DC;
  color: white;
}

.items li.selected:hover {
  background-color: #BBD8DC;
}
.items .text {
  position: relative;
  top: -3px;
}
.items .badge {
  display: inline-block;
  font-size: small;
  color: white;
  padding: 0.8em 0.7em 0 0.7em;
  background-color: #607D8B;
  line-height: 1em;
  position: relative;
  left: -1px;
  top: -4px;
  height: 1.8em;
  margin-right: .8em;
  border-radius: 4px 0 0 4px;
}

/* everywhere else */
* { 
  font-family: Arial, Helvetica, sans-serif; 
}


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

<!DOCTYPE html>
<html>
<html>
  <head>
    <!-- Set the base href -->
    <script>document.write('<base href="' + document.location + '" />');</script>
    <title>Router Sample</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="styles.css">

    <!-- Polyfill(s) for older browsers -->
    <script src="https://npmcdn.com/core-js/client/shim.min.js"></script>

    <script src="https://npmcdn.com/zone.js@0.6.12?main=browser"></script>
    <script src="https://npmcdn.com/reflect-metadata@0.1.3"></script>
    <script src="https://npmcdn.com/systemjs@0.19.27/dist/system.src.js"></script>

    <script src="systemjs.config.js"></script>
    <script>
      System.import('app').catch(function(err){ console.error(err); });
    </script>
  </head>

  <body>
    <my-app>loading...</my-app>
  </body>

</html>


<!-- 
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
-->

/**
 * PLUNKER VERSION (based on systemjs.config.js in angular.io)
 * System configuration for Angular 2 samples
 * Adjust as necessary for your application needs.
 */
(function(global) {

  var ngVer = '@2.0.0-rc.4'; // lock in the angular package version; do not let it float to current!

  //map tells the System loader where to look for things
  var  map = {
    'app':                        'app',

    '@angular':                   'https://npmcdn.com/angular', // sufficient if we didn't pin the version
    
    'angular2-in-memory-web-api': 'https://npmcdn.com/angular2-in-memory-web-api', // get latest
    'rxjs':                       'https://npmcdn.com/rxjs@5.0.0-beta.6',
    'ts':                         'https://npmcdn.com/plugin-typescript@4.0.10/lib/plugin.js',
    'typescript':                 'https://npmcdn.com/typescript@1.8.10/lib/typescript.js',
    '@angular/router':            'https://npmcdn.com/@angular/router@3.0.0-beta.2'
 };

  //packages tells the System loader how to load when no filename and/or no extension
  var packages = {
    'app':                        { main: 'main.ts',  defaultExtension: 'ts' },
    'rxjs':                       { defaultExtension: 'js' },
    'angular2-in-memory-web-api': { main: 'index.js', defaultExtension: 'js' },
    '@angular/router':            { main: 'bundles/router.umd.js', defaultExtension: 'js' }
  };

  var ngPackageNames = [
    'common',
    'compiler',
    'core',
    'http',
    'platform-browser',
    'platform-browser-dynamic'
  ];

  // Add map entries for each angular package
  // only because we're pinning the version with `ngVer`.
  ngPackageNames.forEach(function(pkgName) {
    map['@angular/'+pkgName] = 'https://npmcdn.com/@angular/' + pkgName;
  });

  // Add package entries for angular packages
  ngPackageNames.forEach(function(pkgName) {

    // Bundled (~40 requests):
    packages['@angular/'+pkgName] = { main: 'bundles/' + pkgName + '.umd.js', defaultExtension: 'js' };

    // Individual files (~300 requests):
    //packages['@angular/'+pkgName] = { main: 'index.js', defaultExtension: 'js' };
  });

  var config = {
    // DEMO ONLY! REAL CODE SHOULD NOT TRANSPILE IN THE BROWSER
    transpiler: 'typescript',
    typescriptOptions: {
      "emitDecoratorMetadata": true
    },
    meta: {
      'typescript': {
        "exports": "ts"
      }
    },
    map: map,
    packages: packages
  }

  System.config(config);

})(this);


/*
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by an MIT-style license that
can be found in the LICENSE file at http://angular.io/license
*/

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": true,
    "suppressImplicitAnyIndexErrors": true
  }
}

# The Angular v.3 Router