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/*
* Copyright 2018 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 "GULApplication.h"
NS_ASSUME_NONNULL_BEGIN
typedef NSString *const GULAppDelegateInterceptorID;
/** This class contains methods that isa swizzle the app delegate. */
@interface GULAppDelegateSwizzler : NSProxy
/** Registers an app delegate interceptor whose methods will be invoked as they're invoked on the
* original app delegate.
*
* @param interceptor An instance of a class that conforms to the application delegate protocol.
* The interceptor is NOT retained.
* @return A unique GULAppDelegateInterceptorID if interceptor was successfully registered; nil
* if it fails.
*/
+ (nullable GULAppDelegateInterceptorID)registerAppDelegateInterceptor:
(id<GULApplicationDelegate>)interceptor;
/** Unregisters an interceptor with the given ID if it exists.
*
* @param interceptorID The object that was generated when the interceptor was registered.
*/
+ (void)unregisterAppDelegateInterceptorWithID:(GULAppDelegateInterceptorID)interceptorID;
/** This method ensures that the original app delegate has been proxied. Call this before
* registering your interceptor. This method is safe to call multiple times (but it only proxies
* the app delegate once).
*
* This method doesn't proxy APNS related methods:
* @code
* - application:didRegisterForRemoteNotificationsWithDeviceToken:
* - application:didFailToRegisterForRemoteNotificationsWithError:
* - application:didReceiveRemoteNotification:fetchCompletionHandler:
* - application:didReceiveRemoteNotification:
* @endcode
*
* To proxy these methods use +[GULAppDelegateSwizzler
* proxyOriginalDelegateIncludingAPNSMethods]. The methods have to be proxied separately to
* avoid potential warnings from Apple review about missing Push Notification Entitlement (e.g.
* https://github.com/firebase/firebase-ios-sdk/issues/2807)
*
* The method has no effect for extensions.
*
* @see proxyOriginalDelegateIncludingAPNSMethods
*/
+ (void)proxyOriginalDelegate;
/** This method ensures that the original app delegate has been proxied including APNS related
* methods. Call this before registering your interceptor. This method is safe to call multiple
* times (but it only proxies the app delegate once) or
* after +[GULAppDelegateSwizzler proxyOriginalDelegate]
*
* This method calls +[GULAppDelegateSwizzler proxyOriginalDelegate] under the hood.
* After calling this method the following App Delegate methods will be proxied in addition to
* the methods proxied by proxyOriginalDelegate:
* @code
* - application:didRegisterForRemoteNotificationsWithDeviceToken:
* - application:didFailToRegisterForRemoteNotificationsWithError:
* - application:didReceiveRemoteNotification:fetchCompletionHandler:
* - application:didReceiveRemoteNotification:
* @endcode
*
* The method has no effect for extensions.
*
* @see proxyOriginalDelegate
*/
+ (void)proxyOriginalDelegateIncludingAPNSMethods;
/** Indicates whether app delegate proxy is explicitly disabled or enabled. Enabled by default.
*
* @return YES if AppDelegateProxy is Enabled, NO otherwise.
*/
+ (BOOL)isAppDelegateProxyEnabled;
/** Returns the current sharedApplication.
*
* @return the current application instance if in an app, or nil if in extension or if it doesn't
* exist.
*/
+ (nullable GULApplication *)sharedApplication;
/** Do not initialize this class. */
- (instancetype)init NS_UNAVAILABLE;
NS_ASSUME_NONNULL_END
@end