feat(database): Break out database methods

Author: davideast

src/angularfire2.ts

@@ -16,12 +16,14 @@ import {
   FirebaseAuthState
 } from './providers/auth_backend';
 import {FirebaseSdkAuthBackend} from './providers/firebase_sdk_auth_backend';
+import {FirebaseDatabase} from './database/database';
 
 @Injectable()
 export class AngularFire {
   constructor(
     @Inject(FirebaseUrl) private fbUrl:string,
-    public auth:FirebaseAuth) {
+    public auth:FirebaseAuth,
+    public database: FirebaseDatabase) {
   }
   list (url:string, opts?:FirebaseListFactoryOpts):FirebaseListObservable<any[]> {
     return FirebaseListFactory(getAbsUrl(this.fbUrl, url), opts);

src/database/database.ts

@@ -0,0 +1,24 @@
+import {Inject} from 'angular2/core';
+import {FirebaseUrl} from '../tokens';
+import {FirebaseListObservable} from '../utils/firebase_list_observable';
+import {FirebaseObjectObservable} from '../utils/firebase_object_observable';
+import {FirebaseListFactory, FirebaseListFactoryOpts} from '../utils/firebase_list_factory';
+import {FirebaseObjectFactoryOpts, FirebaseObjectFactory} from '../utils/firebase_object_factory';
+
+export class FirebaseDatabase {
+  constructor(@Inject(FirebaseUrl) private fbUrl:string) {}
+  list (url:string, opts?:FirebaseListFactoryOpts):FirebaseListObservable<any[]> {
+    return FirebaseListFactory(getAbsUrl(this.fbUrl, url), opts);
+  }
+  object(url: string, opts?:FirebaseObjectFactoryOpts):FirebaseObjectObservable<any> {
+    return FirebaseObjectFactory(getAbsUrl(this.fbUrl, url), opts);
+  }
+}
+
+function getAbsUrl (root:string, url:string) {
+  if (!(/^[a-z]+:\/\/.*/.test(url))) {
+    // Provided url is relative.
+    url = root + url;
+  }
+  return url;
+}