Clean Swift - Presenter Component

testpresenter.swift

import UIKit

protocol TestPresenterInput
{
    func presentFetchResults(response: TestModel.Fetch.Response);
}

protocol TestPresenterOutput: class
{
    func successFetchedItems(viewModel: TestModel.Fetch.ViewModel)
    func errorFetchingItems(viewModel: TestModel.Fetch.ViewModel)
}

class TestPresenter: TestPresenterInput {
    
    weak var output: TestPresenterOutput!
    
    // MARK: - Presentation logic
    func presentFetchResults(response: TestModel.Fetch.Response) {
        // NOTE: Format the response from the Interactor and pass the result back to the View Controller
        let viewModel = TestModel.Fetch.ViewModel(name: response.testObj?.name, date: response.testObj?.date, desc: response.testObj?.desc, isError: response.isError, message: response.message)
        
        if viewModel.isError{
            if let output = self.output {
                output.errorFetchingItems(viewModel: viewModel)
            }
        }else{
            if let output = self.output {
                output.successFetchedItems(viewModel: viewModel)
            }
        }
    }
}