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/*
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 * Copyright 2019 Google
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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#import "GoogleDataTransport/GDTCORLibrary/Internal/GDTCORLifecycle.h"
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#import "GoogleDataTransport/GDTCORLibrary/Public/GoogleDataTransport/GDTCORConsoleLogger.h"
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#import "GoogleDataTransport/GDTCORLibrary/Public/GoogleDataTransport/GDTCOREvent.h"
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#import "GoogleDataTransport/GDTCORLibrary/Private/GDTCORRegistrar_Private.h"
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#import "GoogleDataTransport/GDTCORLibrary/Private/GDTCORTransformer_Private.h"
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#import "GoogleDataTransport/GDTCORLibrary/Private/GDTCORUploadCoordinator.h"
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@implementation GDTCORLifecycle
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+ (void)load {
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  [self sharedInstance];
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}
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/** Creates/returns the singleton instance of this class.
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 *
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 * @return The singleton instance of this class.
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 */
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+ (instancetype)sharedInstance {
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  static GDTCORLifecycle *sharedInstance;
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  static dispatch_once_t onceToken;
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  dispatch_once(&onceToken, ^{
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    sharedInstance = [[GDTCORLifecycle alloc] init];
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  });
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  return sharedInstance;
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}
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- (instancetype)init {
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  self = [super init];
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  if (self) {
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    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
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    [notificationCenter addObserver:self
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                           selector:@selector(applicationDidEnterBackground:)
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                               name:kGDTCORApplicationDidEnterBackgroundNotification
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                             object:nil];
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    [notificationCenter addObserver:self
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                           selector:@selector(applicationWillEnterForeground:)
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                               name:kGDTCORApplicationWillEnterForegroundNotification
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                             object:nil];
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    NSString *name = kGDTCORApplicationWillTerminateNotification;
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    [notificationCenter addObserver:self
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                           selector:@selector(applicationWillTerminate:)
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                               name:name
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                             object:nil];
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  }
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  return self;
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}
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- (void)dealloc {
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  [[NSNotificationCenter defaultCenter] removeObserver:self];
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}
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- (void)applicationDidEnterBackground:(NSNotification *)notification {
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  GDTCORApplication *application = [GDTCORApplication sharedApplication];
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  if ([[GDTCORTransformer sharedInstance] respondsToSelector:@selector(appWillBackground:)]) {
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    GDTCORLogDebug(@"%@", @"Signaling GDTCORTransformer that the app is backgrounding.");
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    [[GDTCORTransformer sharedInstance] appWillBackground:application];
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  }
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  if ([[GDTCORUploadCoordinator sharedInstance] respondsToSelector:@selector(appWillBackground:)]) {
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    GDTCORLogDebug(@"%@", @"Signaling GDTCORUploadCoordinator that the app is backgrounding.");
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    [[GDTCORUploadCoordinator sharedInstance] appWillBackground:application];
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  }
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  if ([[GDTCORRegistrar sharedInstance] respondsToSelector:@selector(appWillBackground:)]) {
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    GDTCORLogDebug(@"%@", @"Signaling GDTCORRegistrar that the app is backgrounding.");
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    [[GDTCORRegistrar sharedInstance] appWillBackground:application];
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  }
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}
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- (void)applicationWillEnterForeground:(NSNotification *)notification {
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  GDTCORApplication *application = [GDTCORApplication sharedApplication];
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  if ([[GDTCORTransformer sharedInstance] respondsToSelector:@selector(appWillForeground:)]) {
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    GDTCORLogDebug(@"%@", @"Signaling GDTCORTransformer that the app is foregrounding.");
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    [[GDTCORTransformer sharedInstance] appWillForeground:application];
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  }
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  if ([[GDTCORUploadCoordinator sharedInstance] respondsToSelector:@selector(appWillForeground:)]) {
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    GDTCORLogDebug(@"%@", @"Signaling GDTCORUploadCoordinator that the app is foregrounding.");
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    [[GDTCORUploadCoordinator sharedInstance] appWillForeground:application];
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  }
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  if ([[GDTCORRegistrar sharedInstance] respondsToSelector:@selector(appWillForeground:)]) {
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    GDTCORLogDebug(@"%@", @"Signaling GDTCORRegistrar that the app is foregrounding.");
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    [[GDTCORRegistrar sharedInstance] appWillForeground:application];
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  }
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}
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- (void)applicationWillTerminate:(NSNotification *)notification {
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  GDTCORApplication *application = [GDTCORApplication sharedApplication];
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  if ([[GDTCORTransformer sharedInstance] respondsToSelector:@selector(appWillTerminate:)]) {
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    GDTCORLogDebug(@"%@", @"Signaling GDTCORTransformer that the app is terminating.");
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    [[GDTCORTransformer sharedInstance] appWillTerminate:application];
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  }
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  if ([[GDTCORUploadCoordinator sharedInstance] respondsToSelector:@selector(appWillTerminate:)]) {
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    GDTCORLogDebug(@"%@", @"Signaling GDTCORUploadCoordinator that the app is terminating.");
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    [[GDTCORUploadCoordinator sharedInstance] appWillTerminate:application];
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  }
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  if ([[GDTCORRegistrar sharedInstance] respondsToSelector:@selector(appWillTerminate:)]) {
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    GDTCORLogDebug(@"%@", @"Signaling GDTCORRegistrar that the app is terminating.");
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    [[GDTCORRegistrar sharedInstance] appWillTerminate:application];
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  }
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}
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@end