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/*
* Copyright 2017 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import "GoogleAuthProvider.h"
#import <GoogleSignIn/GoogleSignIn.h>
#import "AppManager.h"
#import <FirebaseCore/FIRApp.h>
#import <FirebaseCore/FIROptions.h>
#import "FIRGoogleAuthProvider.h"
#import "ApplicationDelegate.h"
/** @typedef GoogleSignInCallback
@brief The type of block invoked when a @c GIDGoogleUser object is ready or an error has
occurred.
@param user The Google user if any.
@param error The error which occurred, if any.
*/
typedef void (^GoogleSignInCallback)(GIDGoogleUser *user, NSError *error);
/** @class GoogleAuthDelegate
@brief The designated delegate class for Google Sign-In.
*/
@interface GoogleAuthDelegate : NSObject <GIDSignInDelegate, GIDSignInUIDelegate, OpenURLDelegate>
/** @fn initWithPresentingViewController:callback:
@brief Initializes the new instance with the callback.
@param presentingViewController The view controller to present the UI.
@param callback A block which is invoked when the sign-in flow finishes. Invoked asynchronously
on an unspecified thread in the future.
*/
- (instancetype)initWithPresentingViewController:(UIViewController *)presentingViewController
callback:(nullable GoogleSignInCallback)callback;
@end
@implementation GoogleAuthDelegate {
UIViewController *_presentingViewController;
GoogleSignInCallback _callback;
}
- (instancetype)initWithPresentingViewController:(UIViewController *)presentingViewController
callback:(nullable GoogleSignInCallback)callback {
self = [super init];
if (self) {
_presentingViewController = presentingViewController;
_callback = callback;
}
return self;
}
- (void)signIn:(GIDSignIn *)signIn
didSignInForUser:(GIDGoogleUser *)user
withError:(NSError *)error {
GoogleSignInCallback callback = _callback;
_callback = nil;
if (callback) {
callback(user, error);
}
}
- (void)signIn:(GIDSignIn *)signIn presentViewController:(UIViewController *)viewController {
[_presentingViewController presentViewController:viewController animated:YES completion:nil];
}
- (void)signIn:(GIDSignIn *)signIn dismissViewController:(UIViewController *)viewController {
[_presentingViewController dismissViewControllerAnimated:YES completion:nil];
}
- (BOOL)handleOpenURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication {
return [[GIDSignIn sharedInstance] handleURL:url
sourceApplication:sourceApplication
annotation:nil];
}
@end
@implementation GoogleAuthProvider
- (void)getAuthCredentialWithPresentingViewController:(UIViewController *)viewController
callback:(AuthCredentialCallback)callback {
[self signOut];
// The delegate needs to be retained.
__block GoogleAuthDelegate *delegate = [[GoogleAuthDelegate alloc]
initWithPresentingViewController:viewController
callback:^(GIDGoogleUser *user, NSError *error) {
[ApplicationDelegate setOpenURLDelegate:nil];
delegate = nil;
if (error) {
callback(nil, error);
return;
}
GIDAuthentication *auth = user.authentication;
FIRAuthCredential *credential = [FIRGoogleAuthProvider credentialWithIDToken:auth.idToken
accessToken:auth.accessToken];
callback(credential, error);
}];
GIDSignIn *signIn = [GIDSignIn sharedInstance];
signIn.clientID = [self googleClientID];
signIn.shouldFetchBasicProfile = YES;
signIn.delegate = delegate;
signIn.uiDelegate = delegate;
[ApplicationDelegate setOpenURLDelegate:delegate];
[signIn signIn];
}
- (void)signOut {
[[GIDSignIn sharedInstance] signOut];
}
- (NSString *)googleClientID {
return [AppManager app].options.clientID;
}
@end
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