Created
October 22, 2017 16:37
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| //: A UIKit based Playground for presenting user interface | |
| import UIKit | |
| import PlaygroundSupport | |
| protocol ListGroceriesPresenter { | |
| func show(groceries: [Int]) | |
| func show(grocery: Int) | |
| func showEmptyView() | |
| } | |
| final class ListGroceriesUserCase { | |
| private let presenter: ListGroceriesPresenter | |
| init(presenter: ListGroceriesPresenter) { | |
| self.presenter = presenter | |
| } | |
| func list(groceries: [Int]) { | |
| if groceries.count > 1 { | |
| presenter.show(groceries: groceries) | |
| } if let grocery = groceries.first { | |
| presenter.show(grocery: grocery) | |
| } else { | |
| presenter.showEmptyView() | |
| } | |
| } | |
| } | |
| final class GroceryListView: UIView, ListGroceriesPresenter { | |
| init() {} | |
| func show(groceries: [Int]) { | |
| print("Olha estou apresentando uma listagem") | |
| } | |
| func show(grocery: Int) { | |
| print("Olha estou apresentando um unico item") | |
| } | |
| func showEmptyView() { | |
| print("Olha estou apresentando nada") | |
| } | |
| } | |
| protocol GroceryGateway { | |
| func getGroceryList(onSucess: ([Int]) -> ()) | |
| } | |
| class GroceryListController { | |
| private var mainView: GroceryListView = GroceryListView() | |
| private let groceryGateway: GroceryGateway | |
| init(groceryGateway: GroceryGateway) { | |
| self.groceryGateway = groceryGateway | |
| } | |
| func carregarListagem() { | |
| let listGroceryUseCase = ListGroceriesUserCase(presenter: mainView) | |
| groceryGateway.getGroceryList(onSucess: { groceries in | |
| listGroceryUseCase.list(groceries: groceries) | |
| }) | |
| } | |
| } | |
| // Present the view controller in the Live View window | |
| PlaygroundPage.current.liveView = MyViewController() | |
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