Handle user backing out of social flows (#1764)

Author: samtstern

auth/src/main/java/com/firebase/ui/auth/data/remote/FacebookSignInHandler.java

@@ -20,6 +20,7 @@
 import com.firebase.ui.auth.IdpResponse;
 import com.firebase.ui.auth.data.model.Resource;
 import com.firebase.ui.auth.data.model.User;
+import com.firebase.ui.auth.data.model.UserCancellationException;
 import com.firebase.ui.auth.ui.HelperActivityBase;
 import com.firebase.ui.auth.util.ExtraConstants;
 import com.firebase.ui.auth.viewmodel.ProviderSignInBase;
@@ -111,7 +112,7 @@ public void onSuccess(LoginResult result) {
 
         @Override
         public void onCancel() {
-            onError(new FacebookException());
+            setResult(Resource.<IdpResponse>forFailure(new UserCancellationException()));
         }
 
         @Override

auth/src/main/java/com/firebase/ui/auth/data/remote/GenericIdpSignInHandler.java

@@ -22,6 +22,7 @@
 import com.firebase.ui.auth.data.model.UserCancellationException;
 import com.firebase.ui.auth.ui.HelperActivityBase;
 import com.firebase.ui.auth.util.ExtraConstants;
+import com.firebase.ui.auth.util.FirebaseAuthError;
 import com.firebase.ui.auth.util.data.AuthOperationManager;
 import com.firebase.ui.auth.util.data.ProviderUtils;
 import com.firebase.ui.auth.viewmodel.ProviderSignInBase;
@@ -32,6 +33,7 @@
 import com.google.firebase.auth.AuthCredential;
 import com.google.firebase.auth.AuthResult;
 import com.google.firebase.auth.FirebaseAuth;
+import com.google.firebase.auth.FirebaseAuthException;
 import com.google.firebase.auth.FirebaseAuthUserCollisionException;
 import com.google.firebase.auth.FirebaseUser;
 import com.google.firebase.auth.OAuthCredential;
@@ -91,17 +93,27 @@ public void onSuccess(@NonNull AuthResult authResult) {
                         new OnFailureListener() {
                             @Override
                             public void onFailure(@NonNull Exception e) {
-                                if (e instanceof FirebaseAuthUserCollisionException) {
-                                    FirebaseAuthUserCollisionException collisionException =
-                                            (FirebaseAuthUserCollisionException) e;
-
-                                    setResult(Resource.<IdpResponse>forFailure(
-                                            new FirebaseUiUserCollisionException(
-                                                    ErrorCodes.ERROR_GENERIC_IDP_RECOVERABLE_ERROR,
-                                                    "Recoverable error.",
-                                                    provider.getProviderId(),
-                                                    collisionException.getEmail(),
-                                                    collisionException.getUpdatedCredential())));
+                                if (e instanceof FirebaseAuthException) {
+                                    FirebaseAuthError error =
+                                            FirebaseAuthError.fromException((FirebaseAuthException) e);
+
+                                    if (e instanceof FirebaseAuthUserCollisionException) {
+                                        FirebaseAuthUserCollisionException collisionException =
+                                                (FirebaseAuthUserCollisionException) e;
+
+                                        setResult(Resource.<IdpResponse>forFailure(
+                                                new FirebaseUiUserCollisionException(
+                                                        ErrorCodes.ERROR_GENERIC_IDP_RECOVERABLE_ERROR,
+                                                        "Recoverable error.",
+                                                        provider.getProviderId(),
+                                                        collisionException.getEmail(),
+                                                        collisionException.getUpdatedCredential())));
+                                    } else if (error == FirebaseAuthError.ERROR_WEB_CONTEXT_CANCELED) {
+                                        setResult(Resource.<IdpResponse>forFailure(
+                                                new UserCancellationException()));
+                                    } else {
+                                        setResult(Resource.<IdpResponse>forFailure(e));
+                                    }
                                 } else {
                                     setResult(Resource.<IdpResponse>forFailure(e));
                                 }

auth/src/main/java/com/firebase/ui/auth/util/FirebaseAuthError.java

@@ -2,6 +2,7 @@
 
 import com.google.firebase.auth.FirebaseAuthException;
 
+import androidx.annotation.NonNull;
 import androidx.annotation.RestrictTo;
 
 /**
@@ -83,6 +84,8 @@ public enum FirebaseAuthError {
 
     ERROR_API_NOT_AVAILABLE("The API that you are calling is not available on devices without Google Play Services."),
 
+    ERROR_WEB_CONTEXT_CANCELED("The web operation was canceled by the user"),
+
     ERROR_UNKNOWN("An unknown error occurred.");
 
     /**