gringoireDM

Allow @escaping for optional closures as functions parameters

• Proposal: SE-NNNN
• Authors: Giuseppe Lanza
• Review Manager: TBD
• Status: Awaiting review

Introduction

A closure is said to escape a function when the closure is passed as an argument

gringoireDM

class MyModule: NSObject, EventsProducer {
    ...
    public var events: Observable<ProductDetailPageEvent>
    ...
}

let producer = MyModule(usingContext: ...)

//you can use EventsProucer subscript
producer[event: ProductDetailPageEvent.didAddToCart] //didAddToCart has a BagProductProtocol in the payload

gringoireDM

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {    
    var window: UIWindow?
    
    var moduleManager: BaseModuleManager = BaseModuleManager()
    
    var router: SimpleRouter!
    lazy var eventsListeners: [AnyEventsListening] = {
        [
            ConsoleLogEventsListener(),

gringoireDM

extension UIStoryboard {
    static var restaurantsList: UIStoryboard {
        return UIStoryboard(name: "RestaurantsList", bundle: Bundle(for: RestaurantsListModule.self))
    }
}

public class RestaurantsListModule: NSObject, ModuleProtocol, EventsProducer, PageRepresenting {
    public var context: ModuleContext
    
    public var pageName: String = "Restaurants List"

gringoireDM

//This events listener is interested in any event from any producer
//The purpose of this listener is to log the event with a print
class EventsLogger: AnyEventsListening {
    @discardableResult func registerToEvents(for producer: AnyEventsProducer) -> Bool {
        producer.anyEvent
            .map { String(describing: $0) }
            .subscribe(onNext: { print($0) })
            .disposed(by: producer.disposeBag)
        return true
    }

gringoireDM

class SimpleRouter: Router {
    var viewControllersFactory: ViewControllersFactory?

    required init(withFactory factory: ViewControllersFactory) {
        viewControllersFactory = factory
    }
    
    var topViewController: UIViewController { return rootNavigationController }
    private lazy var rootNavigationController: UINavigationController = {
        let presentableStep = PresentableRoutingStep(withStep: .restaurantsList(), presentationMode: .none)

gringoireDM

public enum ProductDetailPageEvent: EventProtocol {
    case productLoaded(FullProductProtocol)
    case didAddToCart(BagProductProtocol)
    case didAddProductToWaitlist(FullProductProtocol)
    case didShareProduct(MinimumProductProtocol)
    case didChangeSize(newSize: ProductSizeProtocol)
    case didChangeColor(newColor: ProductColorProtocol)
}