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//
// PasscodeLockViewController.swift
// PasscodeLock
//
// Created by Yanko Dimitrov on 8/28/15.
// Copyright © 2015 Yanko Dimitrov. All rights reserved.
//
import UIKit
open class PasscodeLockViewController: UIViewController, PasscodeLockTypeDelegate {
public enum LockState {
case enter
case set
case change
case remove
func getState() -> PasscodeLockStateType {
switch self {
case .enter: return EnterPasscodeState()
case .set: return SetPasscodeState()
case .change: return ChangePasscodeState()
case .remove: return RemovePasscodeState()
}
}
}
@IBOutlet open weak var titleLabel: UILabel?
@IBOutlet open weak var descriptionLabel: UILabel?
@IBOutlet open var placeholders: [PasscodeSignPlaceholderView] = [PasscodeSignPlaceholderView]()
@IBOutlet open weak var cancelButton: UIButton?
@IBOutlet open weak var deleteSignButton: UIButton?
@IBOutlet open weak var touchIDButton: UIButton?
@IBOutlet open weak var placeholdersX: NSLayoutConstraint?
open var successCallback: ((_ lock: PasscodeLockType) -> Void)?
open var dismissCompletionCallback: (()->Void)?
open var animateOnDismiss: Bool
open var notificationCenter: NotificationCenter?
internal let passcodeConfiguration: PasscodeLockConfigurationType
internal var passcodeLock: PasscodeLockType
internal var isPlaceholdersAnimationCompleted = true
fileprivate var shouldTryToAuthenticateWithBiometrics = true
// MARK: - Initializers
public init(state: PasscodeLockStateType, configuration: PasscodeLockConfigurationType, animateOnDismiss: Bool = true) {
self.animateOnDismiss = animateOnDismiss
passcodeConfiguration = configuration
passcodeLock = PasscodeLock(state: state, configuration: configuration)
let nibName = "PasscodeLockView"
let bundle: Bundle = bundleForResource(nibName, ofType: "nib")
super.init(nibName: nibName, bundle: bundle)
passcodeLock.delegate = self
notificationCenter = NotificationCenter.default
}
public convenience init(state: LockState, configuration: PasscodeLockConfigurationType, animateOnDismiss: Bool = true) {
self.init(state: state.getState(), configuration: configuration, animateOnDismiss: animateOnDismiss)
}
public required init(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
deinit {
clearEvents()
}
// MARK: - View
open override func viewDidLoad() {
super.viewDidLoad()
updatePasscodeView()
deleteSignButton?.isEnabled = false
setupEvents()
}
open override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if shouldTryToAuthenticateWithBiometrics {
authenticateWithTouchID()
}
}
internal func updatePasscodeView() {
titleLabel?.text = passcodeLock.state.title
descriptionLabel?.text = passcodeLock.state.description
cancelButton?.isHidden = !passcodeLock.state.isCancellableAction
touchIDButton?.isHidden = !passcodeLock.isTouchIDAllowed
}
// MARK: - Events
fileprivate func setupEvents() {
notificationCenter?.addObserver(self, selector: #selector(PasscodeLockViewController.appWillEnterForegroundHandler(_:)), name: UIApplication.willEnterForegroundNotification, object: nil)
notificationCenter?.addObserver(self, selector: #selector(PasscodeLockViewController.appDidEnterBackgroundHandler(_:)), name: UIApplication.didEnterBackgroundNotification, object: nil)
}
fileprivate func clearEvents() {
notificationCenter?.removeObserver(self, name: UIApplication.willEnterForegroundNotification, object: nil)
notificationCenter?.removeObserver(self, name: UIApplication.didEnterBackgroundNotification, object: nil)
}
@objc open func appWillEnterForegroundHandler(_ notification: Notification) {
authenticateWithTouchID()
}
@objc open func appDidEnterBackgroundHandler(_ notification: Notification) {
shouldTryToAuthenticateWithBiometrics = false
}
// MARK: - Actions
@IBAction func passcodeSignButtonTap(_ sender: PasscodeSignButton) {
guard isPlaceholdersAnimationCompleted else { return }
passcodeLock.addSign(sender.passcodeSign)
}
@IBAction func cancelButtonTap(_ sender: UIButton) {
dismissPasscodeLock(passcodeLock)
}
@IBAction func deleteSignButtonTap(_ sender: UIButton) {
passcodeLock.removeSign()
}
@IBAction func touchIDButtonTap(_ sender: UIButton) {
passcodeLock.authenticateWithTouchID()
}
fileprivate func authenticateWithTouchID() {
if passcodeConfiguration.shouldRequestTouchIDImmediately && passcodeLock.isTouchIDAllowed {
passcodeLock.authenticateWithTouchID()
}
}
internal func dismissPasscodeLock(_ lock: PasscodeLockType, completionHandler: (() -> Void)? = nil) {
// if presented as modal
if presentingViewController?.presentedViewController == self {
dismiss(animated: animateOnDismiss, completion: { [weak self] in
self?.dismissCompletionCallback?()
completionHandler?()
})
return
// if pushed in a navigation controller
} else {
_ = navigationController?.popViewController(animated: animateOnDismiss)
}
dismissCompletionCallback?()
completionHandler?()
}
// MARK: - Animations
internal func animateWrongPassword() {
deleteSignButton?.isEnabled = false
isPlaceholdersAnimationCompleted = false
animatePlaceholders(placeholders, toState: .error)
placeholdersX?.constant = -40
view.layoutIfNeeded()
UIView.animate(
withDuration: 0.5,
delay: 0,
usingSpringWithDamping: 0.2,
initialSpringVelocity: 0,
options: [],
animations: {
self.placeholdersX?.constant = 0
self.view.layoutIfNeeded()
},
completion: { completed in
self.isPlaceholdersAnimationCompleted = true
self.animatePlaceholders(self.placeholders, toState: .inactive)
})
}
internal func animatePlaceholders(_ placeholders: [PasscodeSignPlaceholderView], toState state: PasscodeSignPlaceholderView.State) {
placeholders.forEach { $0.animateState(state) }
}
fileprivate func animatePlacehodlerAtIndex(_ index: Int, toState state: PasscodeSignPlaceholderView.State) {
guard index < placeholders.count && index >= 0 else { return }
placeholders[index].animateState(state)
}
// MARK: - PasscodeLockDelegate
open func passcodeLockDidSucceed(_ lock: PasscodeLockType) {
deleteSignButton?.isEnabled = true
animatePlaceholders(placeholders, toState: .inactive)
dismissPasscodeLock(lock, completionHandler: { [weak self] in
self?.successCallback?(lock)
})
}
open func passcodeLockDidFail(_ lock: PasscodeLockType) {
animateWrongPassword()
}
open func passcodeLockDidChangeState(_ lock: PasscodeLockType) {
updatePasscodeView()
animatePlaceholders(placeholders, toState: .inactive)
deleteSignButton?.isEnabled = false
}
open func passcodeLock(_ lock: PasscodeLockType, addedSignAt index: Int) {
animatePlacehodlerAtIndex(index, toState: .active)
deleteSignButton?.isEnabled = true
}
open func passcodeLock(_ lock: PasscodeLockType, removedSignAt index: Int) {
animatePlacehodlerAtIndex(index, toState: .inactive)
if index == 0 {
deleteSignButton?.isEnabled = false
}
}
}