LONDON-IOS/GME Remit/Utilities/CustomUI/CheckBox/CheckBox+Rx.swift

//
//  CheckBox+Rx.swift
//  GME Remit
//
//  Created by InKwon James Kim on 2020/01/02.
//  Copyright © 2020 Gobal Money Express Co. Ltd. All rights reserved.
//

import RxSwift
import RxCocoa

extension Reactive where Base: CheckBox {
  fileprivate var delegate : RxCheckBoxDelegateProxy {
    return RxCheckBoxDelegateProxy.proxy(for: base)
  }
  
  var isSelected : Observable<Bool> {
    return delegate.isSelected.asObservable()
  }
}

// MARK: RxCheckBoxDelegateProxy
class RxCheckBoxDelegateProxy: DelegateProxy<CheckBox, CheckBoxDelegate>,
  DelegateProxyType, CheckBoxDelegate {
  
  internal var isSelected = BehaviorSubject<Bool>(value: false)
  
  init(parentObject: CheckBox) {
    super.init(parentObject: parentObject, delegateProxy: RxCheckBoxDelegateProxy.self)
  }
  
  public static func registerKnownImplementations() {
    self.register { RxCheckBoxDelegateProxy(parentObject: $0) }
  }
  
  func checkBox(_ checkBox: CheckBox, isSelected: Bool) {
    self.isSelected.onNext(isSelected)
    self.forwardToDelegate()?.checkBox(checkBox, isSelected: isSelected)
  }
  
  static func currentDelegate(for object: CheckBox) -> CheckBoxDelegate? {
    return object.delegate
  }
  
  static func setCurrentDelegate(_ delegate: CheckBoxDelegate?, to object: CheckBox) {
    object.delegate = delegate
  }
  
  deinit {
    isSelected.onCompleted()
  }
}