Repo created

iphone/Maps/UI/BottomMenu/Menu/BottomMenuViewController.swift

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+protocol BottomMenuViewProtocol: AnyObject {
+  var presenter: BottomMenuPresenterProtocol?  { get set }
+}
+
+class BottomMenuViewController: MWMViewController {
+  var presenter: BottomMenuPresenterProtocol?
+  private let transitioningManager = BottomMenuTransitioningManager()
+  
+  @IBOutlet var tableView: UITableView!
+  @IBOutlet var heightConstraint: NSLayoutConstraint!
+  @IBOutlet var bottomConstraint: NSLayoutConstraint!
+
+  lazy var chromeView: UIView = {
+    let view = UIView()
+    view.setStyle(.presentationBackground)
+    return view
+  }()
+  
+  weak var containerView: UIView! {
+    didSet {
+      containerView.insertSubview(chromeView, at: 0)
+    }
+  }
+  
+  override func viewDidLoad() {
+    super.viewDidLoad()
+    
+    tableView.layer.setCornerRadius(.buttonDefault, maskedCorners: [.layerMinXMinYCorner, .layerMaxXMinYCorner])
+    tableView.sectionFooterHeight = 0
+    
+    tableView.dataSource = presenter
+    tableView.delegate = presenter
+    tableView.registerNib(cell: BottomMenuItemCell.self)
+    tableView.registerNib(cell: BottomMenuLayersCell.self)
+
+    NotificationCenter.default.addObserver(forName: UserDefaults.didChangeNotification, object: nil, queue: nil) { _ in
+      DispatchQueue.main.async {
+        self.tableView.reloadData()
+      }
+    }
+  }
+
+  override func viewDidAppear(_ animated: Bool) {
+    super.viewDidAppear(animated)
+    if let cellToHighlight = presenter?.cellToHighlightIndexPath() {
+      tableView.cellForRow(at: cellToHighlight)?.highlight()
+    }
+  }
+
+  override func viewDidLayoutSubviews() {
+    super.viewDidLayoutSubviews()
+    tableView.setNeedsLayout()
+    tableView.layoutIfNeeded()
+    heightConstraint.constant = min(tableView.contentSize.height, view.height)
+    tableView.isScrollEnabled = tableView.contentSize.height > heightConstraint.constant;
+  }
+  
+  @IBAction func onClosePressed(_ sender: Any) {
+    presenter?.onClosePressed()
+  }
+
+  @IBAction func onPan(_ sender: UIPanGestureRecognizer) {
+    let yOffset = sender.translation(in: view.superview).y
+    let yVelocity = sender.velocity(in: view.superview).y
+    sender.setTranslation(CGPoint.zero, in: view.superview)
+    bottomConstraint.constant = min(bottomConstraint.constant - yOffset, 0);
+
+    let alpha = 1.0 - abs(bottomConstraint.constant / tableView.height)
+    self.chromeView.alpha = alpha
+
+    let state = sender.state
+    if state == .ended || state == .cancelled {
+      if yVelocity > 0 || (yVelocity == 0 && alpha < 0.8) {
+        presenter?.onClosePressed()
+      } else {
+        let duration = min(kDefaultAnimationDuration, TimeInterval(self.bottomConstraint.constant / yVelocity))
+        self.view.layoutIfNeeded()
+        UIView.animate(withDuration: duration) {
+          self.chromeView.alpha = 1
+          self.bottomConstraint.constant = 0
+          self.view.layoutIfNeeded()
+        }
+      }
+    }
+  }
+
+  override var transitioningDelegate: UIViewControllerTransitioningDelegate? {
+    get { return transitioningManager }
+    set { }
+  }
+  
+  override var modalPresentationStyle: UIModalPresentationStyle {
+    get { return .custom }
+    set { }
+  }
+}
+
+extension BottomMenuViewController: BottomMenuViewProtocol {
+  
+}