FlorianBasso

enum MovieType: String {
    case Poster = "Poster"
    case Cover = "Cover"
    case Side = "Side"
    
    static var allValues = [Cover, Poster, Side]
}

struct MovieCellItem {
    

FlorianBasso

protocol CellItem {
    
    func reuseIdentifier() -> String
    func cellNib() -> UINib?
    func configureCell(cell: UICollectionViewCell)
    func cellSize(maxSize: CGSize) -> CGSize
    func register(collectionView: UICollectionView)    
}

extension CellItem {

FlorianBasso

protocol ViewModelDelegate: class {
    func viewModelDidStartLoad()
    func viewModelDidLoad()
    func viewModelDidFail()
}

class ViewModel: NSObject {
    
    // MARK: - Properties
    private weak var delegate: ViewModelDelegate?

FlorianBasso

func registerCells() {
    guard let vm = self.viewModel else {
        return
    }
    
    for item in vm.items {
      item.register(self.collectionView)
    }
}

FlorianBasso

extension ViewController: ViewModelDelegate {
    func viewModelDidStartLoad() {
        print("Started !")
    }
    
    func viewModelDidLoad() {
        self.registerCells()
        self.collectionView.reloadData()
    }