feat: implement new pattern in app delegate

Author: hakonk

Example/ios/AppAuthExample/AppDelegate.h

@@ -8,8 +8,10 @@
  */
 
 #import <UIKit/UIKit.h>
+#import <RNAppAuth/RNAppAuthAuthorizationFlowManager.h>
 
-@interface AppDelegate : UIResponder <UIApplicationDelegate>
+@interface AppDelegate : UIResponder <UIApplicationDelegate, RNAppAuthAuthorizationFlowManager>
 @property (nonatomic, strong, nullable) UIWindow *window;
+@property(nonatomic, weak)id<RNAppAuthAuthorizationFlowManagerDelegate>authorizationFlowManagerDelegate;
 @end
 

Example/ios/AppAuthExample/AppDelegate.m

@@ -10,20 +10,9 @@
 #import "AppDelegate.h"
 #import <React/RCTBundleURLProvider.h>
 #import <React/RCTRootView.h>
-#import <AppAuth/AppAuth.h>
-#import <RNAppAuth/RNAppAuthAuthorizationFlowManager.h>
-
-@interface AppDelegate()<RNAppAuthAuthorizationFlowManager> {
-  id <OIDAuthorizationFlowSession> _currentSession;
-}
-@end
 
 @implementation AppDelegate
 
--(void)setCurrentAuthorizationFlowSession:(id<OIDAuthorizationFlowSession>)session {
-  _currentSession = session;
-}
-
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
 {
   NSURL *jsCodeLocation;
@@ -45,9 +34,7 @@ - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(
 }
 
 - (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString *, id> *)options {
-  BOOL shouldOpenUrl = [_currentSession resumeAuthorizationFlowWithURL:url];
-  _currentSession = nil;
-  return shouldOpenUrl;
+  return [self.authorizationFlowManagerDelegate resumeExternalUserAgentFlowWithURL:url];
 }
 
 @end