Added password reset function to Firebase Auth object (flutter#378)

* Added password reset function to Firebase Auth object

* Update CHANGELOG, pubspec.yaml, and add a unit test

Author: jarrodsinclair

packages/firebase_auth/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.4.4
+
+* Added support for sendPasswordResetEmail
+
 ## 0.4.3
 
 * Moved to the io.flutter.plugins organization.

packages/firebase_auth/android/src/main/java/io/flutter/plugins/firebaseauth/FirebaseAuthPlugin.java

@@ -58,6 +58,9 @@ public void onMethodCall(MethodCall call, Result result) {
       case "createUserWithEmailAndPassword":
         handleCreateUserWithEmailAndPassword(call, result);
         break;
+      case "sendPasswordResetEmail":
+        handleSendPasswordResetEmail(call, result);
+        break;
       case "signInWithEmailAndPassword":
         handleSignInWithEmailAndPassword(call, result);
         break;
@@ -140,6 +143,16 @@ private void handleCreateUserWithEmailAndPassword(MethodCall call, final Result
         .addOnCompleteListener(new SignInCompleteListener(result));
   }
 
+  private void handleSendPasswordResetEmail(MethodCall call, final Result result) {
+    @SuppressWarnings("unchecked")
+    Map<String, String> arguments = (Map<String, String>) call.arguments;
+    String email = arguments.get("email");
+
+    firebaseAuth
+        .sendPasswordResetEmail(email)
+        .addOnCompleteListener(new TaskVoidCompleteListener(result));
+  }
+
   private void handleSignInWithEmailAndPassword(MethodCall call, final Result result) {
     @SuppressWarnings("unchecked")
     Map<String, String> arguments = (Map<String, String>) call.arguments;
@@ -305,6 +318,24 @@ public void onComplete(@NonNull Task<AuthResult> task) {
     }
   }
 
+  private class TaskVoidCompleteListener implements OnCompleteListener<Void> {
+    private final Result result;
+
+    TaskVoidCompleteListener(Result result) {
+      this.result = result;
+    }
+
+    @Override
+    public void onComplete(@NonNull Task<Void> task) {
+      if (!task.isSuccessful()) {
+        Exception e = task.getException();
+        result.error(ERROR_REASON_EXCEPTION, e.getMessage(), null);
+      } else {
+        result.success(null);
+      }
+    }
+  }
+
   private ImmutableMap.Builder<String, Object> userInfoToMap(UserInfo userInfo) {
     ImmutableMap.Builder<String, Object> builder =
         ImmutableMap.<String, Object>builder()

packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m

@@ -93,6 +93,12 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
                              completion:^(FIRUser *user, NSError *error) {
                                [self sendResult:result forUser:user error:error];
                              }];
+  } else if ([@"sendPasswordResetEmail" isEqualToString:call.method]) {
+    NSString *email = call.arguments[@"email"];
+    [[FIRAuth auth] sendPasswordResetWithEmail:email
+                                    completion:^(NSError *error) {
+                                      [self sendResult:result forUser:nil error:error];
+                                    }];
   } else if ([@"signInWithEmailAndPassword" isEqualToString:call.method]) {
     NSString *email = call.arguments[@"email"];
     NSString *password = call.arguments[@"password"];

packages/firebase_auth/lib/firebase_auth.dart

@@ -156,6 +156,18 @@ class FirebaseAuth {
     return currentUser;
   }
 
+  Future<Null> sendPasswordResetEmail({
+    @required String email,
+  }) async {
+    assert(email != null);
+    return await channel.invokeMethod(
+      'sendPasswordResetEmail',
+      <String, String>{
+        'email': email,
+      },
+    );
+  }
+
   Future<FirebaseUser> signInWithEmailAndPassword({
     @required String email,
     @required String password,

packages/firebase_auth/pubspec.yaml

@@ -4,7 +4,7 @@ description: Flutter plugin for Firebase Auth, enabling Android and iOS
   and Twitter.
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/firebase_auth
-version: 0.4.3
+version: 0.4.4
 
 flutter:
   plugin:

packages/firebase_auth/test/firebase_auth_test.dart

@@ -36,6 +36,7 @@ void main() {
           case "startListeningAuthState":
             return mockHandleId++;
             break;
+          case "sendPasswordResetEmail":
           case "updateProfile":
             return null;
             break;
@@ -208,6 +209,23 @@ void main() {
       );
     });
 
+    test('sendPasswordResetEmail', () async {
+      await auth.sendPasswordResetEmail(
+        email: kMockEmail,
+      );
+      expect(
+        log,
+        <Matcher>[
+          isMethodCall(
+            'sendPasswordResetEmail',
+            arguments: <String, String>{
+              'email': kMockEmail,
+            },
+          ),
+        ],
+      );
+    });
+
     test('updateProfile', () async {
       final UserUpdateInfo userUpdateInfo = new UserUpdateInfo();
       userUpdateInfo.photoUrl = kMockPhotoUrl;