Linking anonymous account to phone number

packages/firebase_auth/CHANGELOG.md

@@ -1,5 +1,6 @@
 ## 0.6.3
 
+* Added support for `linkWithPhoneNumber` in `FirebaseAuth`.
 * Add multi app support.
 
 ## 0.6.2+1

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

@@ -107,6 +107,9 @@ public void onMethodCall(MethodCall call, Result result) {
       case "getIdToken":
         handleGetToken(call, result, getAuth(call));
         break;
+      case "linkWithPhoneNumber":
+        handleLinkWithPhoneNumber(call, result);
+        break;
       case "linkWithEmailAndPassword":
         handleLinkWithEmailAndPassword(call, result, getAuth(call));
         break;
@@ -257,6 +260,18 @@ private Map<String, Object> getVerifyPhoneNumberExceptionMap(FirebaseException e
     return exceptionMap;
   }
 
+  private void handleLinkWithPhoneNumber(MethodCall call, Result result) {
+    Map<String, String> arguments = (Map<String, String>) call.arguments;
+    String verificationId = arguments.get("verificationId");
+    String smsCode = arguments.get("smsCode");
+
+    PhoneAuthCredential credential = PhoneAuthProvider.getCredential(verificationId, smsCode);
+    firebaseAuth
+        .getCurrentUser()
+        .linkWithCredential(credential)
+        .addOnCompleteListener(new SignInCompleteListener(result));
+  }
+
   private void handleLinkWithEmailAndPassword(
       MethodCall call, Result result, FirebaseAuth firebaseAuth) {
     @SuppressWarnings("unchecked")

packages/firebase_auth/ios/Classes/FirebaseAuthPlugin.m

@@ -161,6 +161,18 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
                       completion:^(NSString *_Nullable token, NSError *_Nullable error) {
                         result(error != nil ? error.flutterError : token);
                       }];
+  } else if ([@"linkWithPhoneNumber" isEqualToString:call.method]) {
+    NSString *verificationId = call.arguments[@"verificationId"];
+    NSString *smsCode = call.arguments[@"smsCode"];
+
+    FIRPhoneAuthCredential *credential =
+        [[FIRPhoneAuthProvider provider] credentialWithVerificationID:verificationId
+                                                     verificationCode:smsCode];
+
+    [[FIRAuth auth].currentUser linkWithCredential:credential
+                                        completion:^(FIRUser *user, NSError *error) {
+                                          [self sendResult:result forUser:user error:error];
+                                        }];
   } else if ([@"linkWithEmailAndPassword" isEqualToString:call.method]) {
     NSString *email = call.arguments[@"email"];
     NSString *password = call.arguments[@"password"];

packages/firebase_auth/lib/firebase_auth.dart

@@ -395,6 +395,24 @@ class FirebaseAuth {
     return currentUser;
   }
 
+  /// Links phone number with current user and returns [Future<FirebaseUser>],
+  /// which will contain the phone number information.
+  /// This throws a [PlatformException] when the [smsCode] could not be validated or the [verificationId] is invalid.
+  Future<FirebaseUser> linkWithPhoneNumber({
+    @required String verificationId,
+    @required String smsCode,
+  }) async {
+    final Map<dynamic, dynamic> data = await channel.invokeMethod(
+      'linkWithPhoneNumber',
+      <String, String>{
+        'verificationId': verificationId,
+        'smsCode': smsCode,
+      },
+    );
+    final FirebaseUser currentUser = FirebaseUser._(data);
+    return currentUser;
+  }
+
   /// Links email account with current user and returns [Future<FirebaseUser>]
   /// basically current user with additional email information
   ///

packages/firebase_auth/test/firebase_auth_test.dart

@@ -153,6 +153,17 @@ void main() {
       );
     });
 
+    test('linkWithPhoneNumber', () async {
+      await auth.linkWithPhoneNumber(
+          verificationId: kMockVerificationId, smsCode: kMockSmsCode);
+      expect(log, <Matcher>[
+        isMethodCall('linkWithPhoneNumber', arguments: <String, String>{
+          'verificationId': kMockVerificationId,
+          'smsCode': kMockSmsCode,
+        })
+      ]);
+    });
+
     test('linkWithEmailAndPassword', () async {
       final FirebaseUser user = await auth.linkWithEmailAndPassword(
         email: kMockEmail,