FormItemCellType.swift

import Foundation
import UIKit

/// Conform receiver to have data validation behavior
protocol FormValidable {
  var isValid: Bool {get set}
  var isMandatory: Bool {get set}
  func checkValidity()
}

/// Conform the view receiver to be updated with a form item
protocol FormUpdatable {
  func update(with formItem: FormItem)
}

/// Conform receiver to have a form item property
protocol FormConformity {
  var formItem: FormItem? {get set}
}

/// UI Cell Type to be displayed
enum FormItemCellType {
  case textField
  case textView
  
  /// Registering methods for all forms items cell types
  ///
  /// - Parameter tableView: TableView where apply cells registration
  static func registerCells(for tableView: UITableView) {
    tableView.register(cellType: FormTextFieldTableViewCell.self)
    tableView.register(cellType: FormTextViewTableViewCell.self)
  }
  
  /// Correctly dequeue the UITableViewCell according to the current cell type
  ///
  /// - Parameters:
  ///   - tableView: TableView where cells previously registered
  ///   - indexPath: indexPath where dequeue
  /// - Returns: a non-nullable UITableViewCell dequeued
  func dequeueCell(for tableView: UITableView, at indexPath: IndexPath) -> UITableViewCell {
    
    let cell: UITableViewCell
    
    switch self {
    case .textView:
      cell = tableView.dequeueReusableCell(for: indexPath,
                                           cellType: FormTextViewTableViewCell.self)
    case .textField:
      cell = tableView.dequeueReusableCell(for: indexPath,
                                           cellType: FormTextFieldTableViewCell.self)
    }
    
    return cell
  }
}