V8tr

enum AppDelegateFactory {
    static func makeDefault() -> AppDelegateType {
        return CompositeAppDelegate(appDelegates: [PushNotificationsAppDelegate(), StartupConfiguratorAppDelegate(), ThirdPartiesConfiguratorAppDelegate()])
    }
}

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

V8tr

class PushNotificationsAppDelegate: AppDelegateType {
    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
        // Registered successfully
    }
}

class StartupConfiguratorAppDelegate: AppDelegateType {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        // Perform startup configurations, e.g. build UI stack, setup UIApperance
        return true

V8tr

typealias AppDelegateType = UIResponder & UIApplicationDelegate

class CompositeAppDelegate: AppDelegateType {
    private let appDelegates: [AppDelegateType]

    init(appDelegates: [AppDelegateType]) {
        self.appDelegates = appDelegates
    }

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

V8tr

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?

    let mediator = AppLifecycleMediator.makeDefaultMediator()

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        return true
    }
}

V8tr

// MARK: - AppLifecycleListener

protocol AppLifecycleListener {
    func onAppWillEnterForeground()
    func onAppDidEnterBackground()
    func onAppDidFinishLaunching()
}

// MARK: - Mediator

V8tr

// MARK: - Builder

final class StartupCommandsBuilder {
    private var window: UIWindow!

    func setKeyWindow(_ window: UIWindow) -> StartupCommandsBuilder {
        self.window = window
        return self
    }

V8tr

protocol Command {
    func execute()
}

struct InitializeThirdPartiesCommand: Command {
    func execute() {
        // Third parties are initialized here
    }
}

V8tr

func averageBenchmark(iterations: Int, numberOfAttempts: Int, block: (Int) -> Void) -> TimeInterval {
    var accumulatedResult: TimeInterval = 0

    for _ in 0..<numberOfAttempts {
        let result = benchmark {
            for i in 0..<iterations {
                block(i)
            }
        }
        accumulatedResult += result

V8tr

func benchmark(block: () -> Void) -> TimeInterval {
    let startTime = CFAbsoluteTimeGetCurrent()
    block()
    let endTime = CFAbsoluteTimeGetCurrent()
    let totalTime = endTime - startTime
    return totalTime
}

V8tr

final class ReadWriteLock {
    private var rwlock: pthread_rwlock_t = {
        var rwlock = pthread_rwlock_t()
        pthread_rwlock_init(&rwlock, nil)
        return rwlock
    }()
    
    func writeLock() {
        pthread_rwlock_wrlock(&rwlock)
    }