chore: rename modules/examples to modules/playground

The directory contains code authored in a style that makes it transpilable to dart. As such, these are not idiomatic examples of Angular 2 usage.

The main purpose of this directory is to enable experimentation with Angular within the angular/angular repository.

Closes #4342

Closes #4639

modules/playground/src/routing/css/app.css

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+body {
+  background:#eee;
+  color:black;
+}
+
+.inbox-list,
+.inbox-list li {
+  list-style:none;
+  padding:0;
+  margin:0;
+}
+
+.inbox-list a {
+  padding:5px;
+  display:block;
+}
+
+inbox, drafts, inbox-side-menu {
+  display:block;
+}
+
+inbox-side-menu .link {
+  display:block;
+  text-align:center;
+  padding:1em;
+}
+
+inbox-side-menu .link.active {
+  background:white;
+}
+
+inbox-side-menu .link:hover {
+  background:#eee;
+}
+
+inbox-side-menu {
+  position:fixed;
+  left:0;
+  top:0;
+  bottom:0;
+  width:200px;
+  background:#ddd;
+}
+
+inbox-side-menu a {
+  display: block;
+}
+
+inbox, drafts, inbox-detail {
+  padding:1em;
+  margin-left:200px;
+}
+
+inbox-detail {
+  display:block;
+  margin-left:200px;
+}

modules/playground/src/routing/drafts.html

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+<div ng-if="ready">
+  <h2 class="page-title">Drafts</h2>
+
+  <ol class="inbox-list">
+    <li *ng-for="#item of items" class="inbox-item-record">
+      <a id="item-{{ item.id }}"
+         [router-link]="['/DetailPage', {'id':item.id}]">
+        {{ item.subject }}</a>
+    </li>
+  </ol>
+</div>

modules/playground/src/routing/inbox-app.html

@@ -0,0 +1,5 @@
+<inbox-side-menu class="inbox-aside">
+  <a [router-link]="['/Inbox']" class="link" [class.active]="inboxPageActive()">Inbox</a>
+  <a [router-link]="['/Drafts']" class="link" [class.active]="draftsPageActive()">Drafts</a>
+</inbox-side-menu>
+<router-outlet></router-outlet>

modules/playground/src/routing/inbox-app.ts

@@ -0,0 +1,161 @@
+import {NgIf, NgFor, EventEmitter, Component, View, Inject, Injectable} from 'angular2/angular2';
+import {
+  RouterLink,
+  RouteConfig,
+  Router,
+  Route,
+  RouterOutlet,
+  Location,
+  RouteParams
+} from 'angular2/router';
+import * as db from './data';
+import {ObservableWrapper, PromiseWrapper, Promise} from 'angular2/src/core/facade/async';
+import {ListWrapper} from 'angular2/src/core/facade/collection';
+import {isPresent, DateWrapper} from 'angular2/src/core/facade/lang';
+
+class InboxRecord {
+  id: string = '';
+  subject: string = '';
+  content: string = '';
+  email: string = '';
+  firstName: string = '';
+  lastName: string = '';
+  date: string;
+  draft: boolean = false;
+
+  constructor(data: {
+    id: string,
+    subject: string,
+    content: string,
+    email: string,
+    firstName: string,
+    lastName: string,
+    date: string, draft?: boolean
+  } = null) {
+    if (isPresent(data)) {
+      this.setData(data);
+    }
+  }
+
+  setData(record: {
+    id: string,
+    subject: string,
+    content: string,
+    email: string,
+    firstName: string,
+    lastName: string,
+    date: string, draft?: boolean
+  }) {
+    this.id = record['id'];
+    this.subject = record['subject'];
+    this.content = record['content'];
+    this.email = record['email'];
+    this.firstName = record['first-name'];
+    this.lastName = record['last-name'];
+    this.date = record['date'];
+    this.draft = record['draft'] == true;
+  }
+}
+
+@Injectable()
+class DbService {
+  getData(): Promise<any[]> {
+    var p = PromiseWrapper.completer();
+    p.resolve(db.data);
+    return p.promise;
+  }
+
+  drafts(): Promise<any[]> {
+    return PromiseWrapper.then(this.getData(), (data) => {
+      return ListWrapper.filter(data,
+                                (record => isPresent(record['draft']) && record['draft'] == true));
+    });
+  }
+
+  emails(): Promise<any[]> {
+    return PromiseWrapper.then(this.getData(), (data) => {
+      return ListWrapper.filter(data, (record => !isPresent(record['draft'])));
+    });
+  }
+
+  email(id): Promise<any> {
+    return PromiseWrapper.then(this.getData(), (data) => {
+      for (var i = 0; i < data.length; i++) {
+        var entry = data[i];
+        if (entry['id'] == id) {
+          return entry;
+        }
+      }
+    });
+  }
+}
+
+@Component({selector: 'inbox-detail'})
+@View({templateUrl: "inbox-detail.html", directives: [NgFor, RouterLink]})
+class InboxDetailCmp {
+  record: InboxRecord = new InboxRecord();
+  ready: boolean = false;
+
+  constructor(db: DbService, params: RouteParams) {
+    var id = params.get('id');
+    PromiseWrapper.then(db.email(id), (data) => { this.record.setData(data); });
+  }
+}
+
+@Component({selector: 'inbox'})
+@View({templateUrl: "inbox.html", directives: [NgFor, RouterLink]})
+class InboxCmp {
+  items: InboxRecord[] = [];
+  ready: boolean = false;
+
+  constructor(public router: Router, db: DbService, params: RouteParams) {
+    var sortType = params.get('sort');
+    var sortEmailsByDate = isPresent(sortType) && sortType == "date";
+
+    PromiseWrapper.then(db.emails(), emails => {
+      this.ready = true;
+      this.items = emails.map(data => new InboxRecord(data));
+
+      if (sortEmailsByDate) {
+        ListWrapper.sort(this.items,
+                         (a, b) => DateWrapper.toMillis(DateWrapper.fromISOString(a.date)) <
+                                           DateWrapper.toMillis(DateWrapper.fromISOString(b.date)) ?
+                                       -1 :
+                                       1);
+      }
+    });
+  }
+}
+
+
+@Component({selector: 'drafts'})
+@View({templateUrl: "drafts.html", directives: [NgFor, RouterLink]})
+class DraftsCmp {
+  items: InboxRecord[] = [];
+  ready: boolean = false;
+
+  constructor(public router: Router, db: DbService) {
+    PromiseWrapper.then(db.drafts(), (drafts) => {
+      this.ready = true;
+      this.items = drafts.map(data => new InboxRecord(data));
+    });
+  }
+}
+
+@Component({selector: 'inbox-app', viewProviders: [DbService]})
+@View({templateUrl: "inbox-app.html", directives: [RouterOutlet, RouterLink]})
+@RouteConfig([
+  new Route({path: '/', component: InboxCmp, as: 'Inbox'}),
+  new Route({path: '/drafts', component: DraftsCmp, as: 'Drafts'}),
+  new Route({path: '/detail/:id', component: InboxDetailCmp, as: 'DetailPage'})
+])
+export class InboxApp {
+  router: Router;
+  location: Location;
+  constructor(router: Router, location: Location) {
+    this.router = router;
+    this.location = location;
+  }
+  inboxPageActive() { return this.location.path() == ''; }
+  draftsPageActive() { return this.location.path() == '/drafts'; }
+}

modules/playground/src/routing/inbox-detail.html

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+<div ng-if="ready">
+  <h2 class="page-title">{{ record.subject }}</h2>
+
+  <ul>
+    <li id="record-id">ID: {{ record.id }}</li>
+    <li id="record-name">Name: {{ record.firstName }} {{ record.lastName }}</li>
+    <li id="record-email">Email: {{ record.email }}</li>
+    <li id="record-date">Date: {{ record.date }}</li>
+  </ul>
+
+  <p>
+    {{ record.content }}
+  </p>
+
+  <span class="btn medium primary">
+    <a [router-link]="record.draft ? ['../Drafts'] : ['../Inbox']" class="back-button">Back</a>
+  </span>
+
+  <hr />
+
+  <a [router-link]="['../Inbox', { sort: 'date'} ]" class="sort-button">
+    View Latest Messages
+  </a>
+</div>

modules/playground/src/routing/inbox.html

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+<div ng-if="ready">
+  <h2 class="page-title">Inbox</h2>
+
+  <ol class="inbox-list">
+    <li *ng-for="#item of items" class="inbox-item-record">
+      <a id="item-{{ item.id }}"
+         [router-link]="['/DetailPage', {'id':item.id}]">{{ item.subject }}</a>
+    </li>
+  </ol>
+</div>

modules/playground/src/routing/index.html

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+<!doctype html>
+<html>
+  <title>Routing Example</title>
+  <link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/gumby/2.6.0/css/gumby.css" />
+  <link rel="stylesheet" type="text/css" href="./css/app.css" />
+  <base href="/playground/src/routing/">
+<body>
+  <inbox-app>
+    Loading...
+  </inbox-app>
+
+  $SCRIPTS$
+</body>
+</html>

modules/playground/src/routing/index.ts

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+import {InboxApp} from './inbox-app';
+import {bind, provide} from 'angular2/angular2';
+import {bootstrap} from 'angular2/bootstrap';
+import {ROUTER_PROVIDERS, HashLocationStrategy, LocationStrategy} from 'angular2/router';
+
+import {reflector} from 'angular2/src/core/reflection/reflection';
+import {ReflectionCapabilities} from 'angular2/src/core/reflection/reflection_capabilities';
+
+export function main() {
+  reflector.reflectionCapabilities = new ReflectionCapabilities();
+  bootstrap(InboxApp,
+            [ROUTER_PROVIDERS, provide(LocationStrategy, {useClass: HashLocationStrategy})]);
+}