Adding MulticastAppDelegate

.gitignore

@@ -51,3 +51,5 @@ firebase-ios-sdk/
 
 #scripts link
 scripts
+
+GoogleMulticastAppDelegate/Apps/SwiftUISample/SwiftUISample/GoogleService-Info.plist

GoogleMulticastAppDelegate.podspec

@@ -0,0 +1,74 @@
+Pod::Spec.new do |s|
+  # TODO: Is `GoogleMulticastAppDelegate` name fine?
+  s.name             = 'GoogleMulticastAppDelegate'
+  s.version          = '7.7.0'
+  s.summary          = 'GoogleMulticastAppDelegate'
+
+  s.description      = <<-DESC
+  GoogleMulticastAppDelegate
+                       DESC
+
+  s.homepage         = 'https://github.com/google/GoogleUtilities'
+  s.license          = { :type => 'Apache', :file => 'LICENSE' }
+  s.authors          = 'Google, Inc.'
+
+  s.source           = {
+    :git => 'https://github.com/google/GoogleUtilities.git',
+    :tag => 'MulticastAppDelegate-' + s.version.to_s
+  }
+
+  ios_deployment_target = '9.0'
+  osx_deployment_target = '10.12'
+  tvos_deployment_target = '10.0'
+  watchos_deployment_target = '6.0'
+
+  s.ios.deployment_target = ios_deployment_target
+  # s.osx.deployment_target = osx_deployment_target
+  # s.tvos.deployment_target = tvos_deployment_target
+  # s.watchos.deployment_target = watchos_deployment_target
+
+  s.swift_versions = ['5.0', '5.2']
+
+  s.cocoapods_version = '>= 1.4.0'
+  s.prefix_header_file = false
+
+  s.pod_target_xcconfig = {
+    'GCC_C_LANGUAGE_STANDARD' => 'c99',
+    'HEADER_SEARCH_PATHS' => '"${PODS_TARGET_SRCROOT}"',
+  }
+
+  base_dir = "GoogleMulticastAppDelegate/"
+  s.source_files = [
+    base_dir + 'Sources/**/*.[hm]',
+  ]
+
+  s.dependency 'GoogleUtilities/AppDelegateSwizzler', '~> 7.7'
+
+  # s.test_spec 'unit' do |unit_tests|
+  #   unit_tests.scheme = { :code_coverage => true }
+  #   unit_tests.platforms = {
+  #     :ios => ios_deployment_target,
+  #     :osx => osx_deployment_target,
+  #     :tvos => tvos_deployment_target
+  #   }
+  #   unit_tests.source_files = [
+  #     base_dir + 'Tests/Unit/**/*.[mh]',
+  #   ]
+  #   unit_tests.requires_app_host = true
+  #   unit_tests.dependency 'OCMock'
+  # end
+
+  # s.test_spec 'unit-swift' do |unit_tests_swift|
+  #   unit_tests_swift.scheme = { :code_coverage => true }
+  #   unit_tests_swift.platforms = {
+  #     :ios => ios_deployment_target,
+  #     :osx => osx_deployment_target,
+  #     :tvos => tvos_deployment_target
+  #   }
+  #   unit_tests_swift.source_files = [
+  #     base_dir + 'Tests/Unit/**/*.swift',
+  #   ]
+
+  #   unit_tests_swift.requires_app_host = true
+  # end
+end

GoogleMulticastAppDelegate/Sources/GULMulticastAppDelegate.m

@@ -0,0 +1,155 @@
+// Copyright 2022 Google LLC
+//
+// 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 "GoogleMulticastAppDelegate/Sources/Public/GoogleUtilities/GULMulticastAppDelegate.h"
+
+@interface GULMulticastAppDelegate () <GULMulticastAppDelegateProtocol> {
+  NSMutableArray<id> *_interceptors;
+  id<GULApplicationDelegate> _defaultAppDelegate;
+}
+@end
+
+@implementation GULMulticastAppDelegate
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _interceptors = [[NSMutableArray alloc] init];
+  }
+  return self;
+}
+
+- (instancetype)initWithAppDelegate:(id<GULApplicationDelegate>)delegate {
+  self = [super init];
+  if (self) {
+    _interceptors = [[NSMutableArray alloc] init];
+    [_interceptors addObject:delegate];
+    _defaultAppDelegate = delegate;
+  }
+  return self;
+}
+
++ (id<GULMulticastAppDelegateProtocol>)multicastDelegate {
+  id<UIApplicationDelegate> appDelegate = [UIApplication sharedApplication].delegate;
+  if (!appDelegate) {
+    return nil;
+  }
+  if ([appDelegate conformsToProtocol:@protocol(GULMulticastAppDelegateProtocol)]) {
+    id<GULMulticastAppDelegateProtocol> multicastAppDelegate =
+        (id<GULMulticastAppDelegateProtocol>)appDelegate;
+    return multicastAppDelegate;
+  }
+  if (appDelegate && [appDelegate respondsToSelector:@selector(getMulticastDelegate)]) {
+    id<GULMulticastAppDelegateProtocol> multicastDelegate =
+        [appDelegate performSelector:@selector(getMulticastDelegate)];
+    CFRetain((__bridge CFTypeRef)(multicastDelegate));
+    return multicastDelegate;
+  }
+  return nil;
+}
+
+- (id<GULMulticastAppDelegateProtocol>)getMulticastDelegate {
+  return self;
+}
+
+- (void)addInterceptorWithDelegate:(id<GULApplicationDelegate>)interceptor {
+  [_interceptors addObject:interceptor];
+}
+
+- (void)removeInterceptorWithDelegate:(id<GULApplicationDelegate>)interceptor {
+  [_interceptors removeObject:interceptor];
+}
+
+- (BOOL)respondsToSelector:(SEL)aSelector {
+  if ([[self class] instancesRespondToSelector:aSelector]) {
+    return YES;
+  }
+  for (id<GULApplicationDelegate> interceptor in _interceptors) {
+    if (interceptor && [interceptor respondsToSelector:aSelector]) {
+      return YES;
+    }
+  }
+  return NO;
+}
+
+- (void)setDefaultAppDelegate:(id<UIApplicationDelegate>)defaultAppDelegate {
+  [_interceptors addObject:defaultAppDelegate];
+  _defaultAppDelegate = defaultAppDelegate;
+}
+
+- (id)forwardingTargetForSelector:(SEL)aSelector {
+  return _defaultAppDelegate;
+}
+
+#if !TARGET_OS_WATCH
+#pragma mark - Open URL
+- (BOOL)application:(GULApplication *)app
+            openURL:(NSURL *)url
+            options:(NSDictionary<UIApplicationOpenURLOptionsKey, id> *)options {
+  BOOL result = NO;
+  for (id<UIApplicationDelegate> interceptor in _interceptors) {
+    result = result || [interceptor application:app openURL:url options:options];
+  }
+  return result;
+}
+
+#pragma mark - APNS methods
+- (void)application:(GULApplication *)application
+    didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
+  for (id<GULApplicationDelegate> interceptor in _interceptors) {
+    if ([interceptor respondsToSelector:@selector(application:
+                                            didRegisterForRemoteNotificationsWithDeviceToken:)]) {
+      [interceptor application:application
+          didRegisterForRemoteNotificationsWithDeviceToken:deviceToken];
+    }
+  }
+}
+
+#else   // !TARGET_OS_WATCH
+- (void)didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
+  for (id<GULApplicationDelegate> interceptor in _interceptors) {
+    if ([interceptor
+            respondsToSelector:@selector(didRegisterForRemoteNotificationsWithDeviceToken)]) {
+      [interceptor didRegisterForRemoteNotificationsWithDeviceToken:deviceToken];
+    }
+  }
+}
+#endif  // !TARGET_OS_WATCH
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+- (void)application:(GULApplication *)application
+    didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {
+  for (id<GULApplicationDelegate> interceptor in _interceptors) {
+    if ([interceptor respondsToSelector:@selector(application:
+                                            didFailToRegisterForRemoteNotificationsWithError:)]) {
+      [interceptor application:application didFailToRegisterForRemoteNotificationsWithError:error];
+    }
+  }
+}
+
+- (void)application:(GULApplication *)application
+    didReceiveRemoteNotification:(NSDictionary *)userInfo
+          fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler {
+  for (id<GULApplicationDelegate> interceptor in _interceptors) {
+    if ([interceptor respondsToSelector:@selector
+                     (application:didReceiveRemoteNotification:fetchCompletionHandler:)]) {
+      [interceptor application:application
+          didReceiveRemoteNotification:userInfo
+                fetchCompletionHandler:completionHandler];
+    }
+  }
+}
+#endif
+
+@end

GoogleMulticastAppDelegate/Sources/Public/GoogleUtilities/GULMulticastAppDelegate.h

@@ -0,0 +1,40 @@
+// Copyright 2022 Google LLC
+//
+// 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 <Foundation/Foundation.h>
+
+#import <GoogleUtilities/GULApplication.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@protocol GULMulticastAppDelegateProtocol <NSObject>
+
+- (void)addInterceptorWithDelegate:(id<GULApplicationDelegate>)interceptor;
+
+- (void)removeInterceptorWithDelegate:(id<GULApplicationDelegate>)interceptor;
+
+@end
+
+@interface GULMulticastAppDelegate : NSObject <GULApplicationDelegate>
+
+@property(nonatomic, copy) id<GULApplicationDelegate> defaultAppDelegate;
+
+- (instancetype)initWithAppDelegate:(id<GULApplicationDelegate>)delegate;
+
+- (void)addInterceptorWithDelegate:(id<GULApplicationDelegate>)delegate;
+
++ (id<GULMulticastAppDelegateProtocol>)multicastDelegate;
+@end
+
+NS_ASSUME_NONNULL_END