SwiftyInAppMessaging

func application(_ application: UIApplication, didFinishLaunchWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
  InAppMessaging.inAppMessaging().messageDisplayComponent = SwiftyInAppMessaging()
}

struct InAppMyModalMessageHandler: InAppModalMessageHandler {
    let messageForDisplay: InAppMessagingModalDisplay

    init(message messageForDisplay: InAppMessagingModalDisplay) {
        self.messageForDisplay = messageForDisplay
    }

    func displayMessage(with delegate: InAppMessagingDisplayDelegate) throws {
        let alert = UIAlertController(title: self.messageForDisplay.title)
        let ok = UIAlertAction(title: "OK", style: .default, handler: { [weak self] _ in
            guard let messageForDisplay = self?.messageForDisplay else {
                return
            }
            
            delegate.messageClicked?(messageForDisplay, with: InAppMessagingAction(actionText: "OK", actionURL: nil)
        })

        alert.addAction(ok)

        DispatchQueue.main.async {
            UIApplication.shared.topViewController?.present(alert, animated: true, completion: nil)
        }
    }

    func displayError(_ error: Error) {
        debugLog(error)
    }
}

enum YourOwnMessageRouter {
    case banner(InAppMessagingBannerDisplay)
    case card(InAppMessagingCardDisplay)
    case customModal(InAppMessagingModalDisplay)
    case imageOnly(InAppMessagingImageOnlyDisplay)

    static func match(for message: InAppMessagingDisplayMessage) -> Self? {
        switch message.typeWithDisplayMessage {
        case .banner(let message):
            return .banner(message: message)
        case .card(let message):
            return .card(message: message)
        case .imageOnly(let message):
            return .imageOnly(message: message)
        case .modal(let message):
            return .customModal(message: message)
        @unknown default:
            return nil
    }
    
    var messageHandler: InAppMessageHandler {
        switch self {
        case .banner(let message):
            return message.defaultHandler
        case .card(let message):
            return message.defaultHandler
        case .imageOnly(let message):
            return message.defaultHandler
        case .customModal(let message):
            return InAppMyModalMessageHandler(message: message)
        }
    }
}

func application(_ application: UIApplication, didFinishLaunchWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
  InAppMessaging.inAppMessaging().messageDisplayComponent = SwiftyInAppMessaging<YourOwnMessageRouter>()
}

let package = Package(
    name: "MyPackage",
    products: [...],
    dependencies: [
        .package(url: "https://github.com/fumito-ito/SwiftyInAppMessaging.git", .upToNextMajor(from: "2.0.0"))
    ]
)