Add Google auth scope. (#4)

Author: matanlurey

CHANGELOG.md

@@ -1,3 +1,20 @@
+## 0.2.1
+
+- Add an option to add additional authorization scopes to `googleSignIn`:
+
+```dart
+// Authenticate and allow read-only access to Google Calendar.
+final user = await firebaseAuth.googleSignIn(
+  scopes: [
+    'https://www.googleapis.com/auth/calendar.readonly',  
+  ],
+);
+
+if (user != null) {
+  // You have access!
+}
+```
+
 ## 0.2.0
 
 - Fixed a bug that flashed signed off content before loading.

lib/src/directives/firebase_auth.dart

@@ -35,15 +35,16 @@ abstract class FirebaseAuth {
   /// Returns a future that completes after authenticated.
   ///
   /// May optionally disable [prompt] if the user is already authenticated.
-  Future<FirebaseUser> googleSignIn({bool prompt: true});
+  Future<FirebaseUser> googleSignIn({
+    bool prompt: true,
+    List<String> scopes: const [],
+  });
 
   /// Sign out of any authenticated account.
   Future<Null> signOut();
 }
 
 class _SdkFirebaseAuth implements FirebaseAuth {
-  static final _googleAuth = new sdk.GoogleAuthProvider();
-
   final sdk.App _app;
   final _onUserChanged = new StreamController<FirebaseUser>.broadcast();
 
@@ -70,12 +71,15 @@ class _SdkFirebaseAuth implements FirebaseAuth {
   @override
   Future<FirebaseUser> googleSignIn({
     bool prompt: true,
+    List<String> scopes: const [],
   }) async {
-    _googleAuth.setCustomParameters(<String, String>{
+    final googleAuth = new sdk.GoogleAuthProvider();
+    scopes.forEach(googleAuth.addScope);
+    googleAuth.setCustomParameters(<String, dynamic>{
       'prompt': prompt ? 'select_account' : 'none',
     });
     try {
-      final user = await _app.auth().signInWithPopup(_googleAuth);
+      final user = await _app.auth().signInWithPopup(googleAuth);
       return new FirebaseUser._fromSdk(user.user);
     } catch (_) {
       return null;

pubspec.yaml

@@ -1,7 +1,7 @@
 name: angular_fire
 description: >
   Unofficial library for AngularDart and Firebase.
-version: 0.2.0
+version: 0.2.1
 authors:
   - Matan Lurey <matanl@google.com>
 homepage: https://github.com/matanlurey/angular_fire

web/main.dart

@@ -59,7 +59,9 @@ class AngularFireExample {
   AngularFireExample(this._auth);
 
   void signIn() {
-    _auth.googleSignIn();
+    _auth.googleSignIn(scopes: [
+      'https://www.googleapis.com/auth/calendar.readonly',
+    ]);
   }
 
   void signOut() {