Repo created

iphone/Maps/UI/ColorPicker/ColorPicker.swift

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+enum ColorPickerType {
+  case defaultColorPicker(UIColor)
+  case bookmarkColorPicker(BookmarkColor)
+}
+
+final class ColorPicker: NSObject {
+
+  static let shared = ColorPicker()
+
+  private var onUpdateColorHandler: ((UIColor) -> Void)?
+
+  // MARK: - Public
+  /// Presents a color picker view controller modally from a specified root view controller.
+  ///
+  /// - Uses native color picker on the iOS 14.0+ for the `defaultColorPicker` type on iPhone and iPad.
+  /// - For the rest of the iOS versions, `bookmarkColorPicker` type and iPad designed for Mac uses a custom color picker.
+  ///
+  func present(from rootViewController: UIViewController, pickerType: ColorPickerType, completionHandler: ((UIColor) -> Void)?) {
+    onUpdateColorHandler = completionHandler
+    let colorPickerViewController: UIViewController
+
+    switch pickerType {
+    case .defaultColorPicker(let color):
+      if !ProcessInfo.processInfo.isiOSAppOnMac {
+        colorPickerViewController = defaultColorPickerViewController(with: color)
+      } else {
+        colorPickerViewController = bookmarksColorPickerViewController(with: BookmarkColor.bookmarkColor(from: color) ?? .none)
+      }
+    case .bookmarkColorPicker(let bookmarkColor):
+      colorPickerViewController = bookmarksColorPickerViewController(with: bookmarkColor)
+    }
+    rootViewController.present(colorPickerViewController, animated: true)
+  }
+
+  // MARK: - Private
+  @available(iOS 14.0, *)
+  private func defaultColorPickerViewController(with selectedColor: UIColor) -> UIViewController {
+    let colorPickerController = UIColorPickerViewController()
+    colorPickerController.supportsAlpha = false
+    colorPickerController.selectedColor = selectedColor
+    colorPickerController.delegate = self
+    return colorPickerController
+  }
+
+  private func bookmarksColorPickerViewController(with selectedColor: BookmarkColor) -> UIViewController {
+    let bookmarksColorViewController = BookmarkColorViewController(bookmarkColor: selectedColor)
+    bookmarksColorViewController.delegate = self
+    // The navigation controller is used for getting the navigation item with the title and the close button.
+    let navigationController = UINavigationController(rootViewController: bookmarksColorViewController)
+    return navigationController
+  }
+}
+
+// MARK: - BookmarkColorViewControllerDelegate
+extension ColorPicker: BookmarkColorViewControllerDelegate {
+  func bookmarkColorViewController(_ viewController: BookmarkColorViewController, didSelect bookmarkColor: BookmarkColor) {
+    onUpdateColorHandler?(bookmarkColor.color)
+    onUpdateColorHandler = nil
+    viewController.dismiss(animated: true)
+  }
+}
+
+// MARK: - UIColorPickerViewControllerDelegate
+extension ColorPicker: UIColorPickerViewControllerDelegate {
+  @available(iOS 14.0, *)
+  func colorPickerViewControllerDidFinish(_ viewController: UIColorPickerViewController) {
+    onUpdateColorHandler?(viewController.selectedColor.sRGBColor)
+    onUpdateColorHandler = nil
+    viewController.dismiss(animated: true, completion: nil)
+  }
+
+  @available(iOS 14.0, *)
+  func colorPickerViewControllerDidSelectColor(_ viewController: UIColorPickerViewController) {
+    onUpdateColorHandler?(viewController.selectedColor.sRGBColor)
+  }
+}