Create MainWindow folder to match Mac folder structure.

iOS/MainWindow/MainTimeline/MarkAsReadAlertController.swift

@@ -0,0 +1,85 @@
+//
+//  UndoAvailableAlertController.swift
+//  NetNewsWire
+//
+//  Created by Phil Viso on 9/29/19.
+//  Copyright © 2019 Ranchero Software. All rights reserved.
+//
+
+import Foundation
+import UIKit
+
+protocol MarkAsReadAlertControllerSourceType {}
+extension CGRect: MarkAsReadAlertControllerSourceType {}
+extension UIView: MarkAsReadAlertControllerSourceType {}
+extension UIBarButtonItem: MarkAsReadAlertControllerSourceType {}
+
+struct MarkAsReadAlertController {
+
+	static func confirm<T>(
+		_ controller: UIViewController?,
+		coordinator: SceneCoordinator?,
+		confirmTitle: String,
+		sourceType: T,
+		cancelCompletion: (() -> Void)? = nil,
+		completion: @escaping () -> Void
+	) where T: MarkAsReadAlertControllerSourceType {
+
+		guard let controller = controller, let coordinator = coordinator else {
+			completion()
+			return
+		}
+
+		if AppDefaults.confirmMarkAllAsRead {
+			let alertController = MarkAsReadAlertController.alert(coordinator: coordinator, confirmTitle: confirmTitle, cancelCompletion: cancelCompletion, sourceType: sourceType) { _ in
+				completion()
+			}
+			controller.present(alertController, animated: true)
+		} else {
+			completion()
+		}
+	}
+
+	private static func alert<T>(
+		coordinator: SceneCoordinator,
+		confirmTitle: String,
+		cancelCompletion: (() -> Void)?,
+		sourceType: T,
+		completion: @escaping (UIAlertAction) -> Void
+	) -> UIAlertController where T: MarkAsReadAlertControllerSourceType {
+
+		let title = NSLocalizedString("Mark As Read", comment: "Mark As Read")
+		let message = NSLocalizedString("You can turn this confirmation off in Settings.",
+										comment: "You can turn this confirmation off in Settings.")
+		let cancelTitle = NSLocalizedString("Cancel", comment: "Cancel")
+		let settingsTitle = NSLocalizedString("Open Settings", comment: "Open Settings")
+
+		let alertController = UIAlertController(title: title, message: message, preferredStyle: .actionSheet)
+		let cancelAction = UIAlertAction(title: cancelTitle, style: .cancel) { _ in
+			cancelCompletion?()
+		}
+		let settingsAction = UIAlertAction(title: settingsTitle, style: .default) { _ in
+			coordinator.showSettings(scrollToArticlesSection: true)
+		}
+		let markAction = UIAlertAction(title: confirmTitle, style: .default, handler: completion)
+
+		alertController.addAction(markAction)
+		alertController.addAction(settingsAction)
+		alertController.addAction(cancelAction)
+
+		if let barButtonItem = sourceType as? UIBarButtonItem {
+			alertController.popoverPresentationController?.barButtonItem = barButtonItem
+		}
+
+		if let rect = sourceType as? CGRect {
+			alertController.popoverPresentationController?.sourceRect = rect
+		}
+
+		if let view = sourceType as? UIView {
+			alertController.popoverPresentationController?.sourceView = view
+		}
+
+		return alertController
+	}
+
+}