Initial implementation of using YubiKey for decryption (#533)

passKit/Protocols/AlertPresenting.swift

@@ -0,0 +1,55 @@
+//
+//  AlertPresenting.swift
+//  pass
+//
+//  Copyright © 2022 Bob Sun. All rights reserved.
+//
+
+import UIKit
+
+public typealias AlertAction = (UIAlertAction) -> Void
+
+public protocol AlertPresenting {
+    func presentAlert(title: String, message: String)
+    func presentFailureAlert(title: String?, message: String, action: AlertAction?)
+    func presentAlertWithAction(title: String, message: String, action: AlertAction?)
+}
+
+public extension AlertPresenting where Self: UIViewController {
+    func presentAlert(title: String, message: String) {
+        presentAlert(
+            title: title,
+            message: message,
+            actions: [UIAlertAction(title: "OK", style: .cancel, handler: nil)]
+        )
+    }
+
+    // swiftlint:disable function_default_parameter_at_end
+    func presentFailureAlert(title: String? = nil, message: String, action: AlertAction? = nil) {
+        let title = title ?? "Error"
+        presentAlert(
+            title: title,
+            message: message,
+            actions: [UIAlertAction(title: "OK", style: .cancel, handler: action)]
+        )
+    }
+
+    func presentAlertWithAction(title: String, message: String, action: AlertAction?) {
+        presentAlert(
+            title: title,
+            message: message,
+            actions: [
+                UIAlertAction(title: "Yes", style: .default, handler: action),
+                UIAlertAction(title: "No", style: .cancel, handler: nil),
+            ]
+        )
+    }
+
+    private func presentAlert(title: String, message: String, actions: [UIAlertAction] = []) {
+        let alertController = UIAlertController(title: title, message: message, preferredStyle: .alert)
+        actions.forEach { action in
+            alertController.addAction(action)
+        }
+        present(alertController, animated: true, completion: nil)
+    }
+}