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import UIKit
struct AlertBuilder {
private var style: UIAlertController.Style = .alert
private var title: String?
private var message: String?
private var actions: [UIAlertAction] = []
func style(_ style: UIAlertController.Style) -> AlertBuilder {
var copy = self
copy.style = style
return copy
}
func title(_ title: String) -> AlertBuilder {
var copy = self
copy.title = title
return copy
}
func message(_ message: String) -> AlertBuilder {
var copy = self
copy.message = message
return copy
}
func addAction(title: String,
style: UIAlertAction.Style,
callback: @escaping () -> Void) -> AlertBuilder {
let action = UIAlertAction(title: title, style: style) { _ in
callback()
}
var copy = self
copy.actions.append(action)
return copy
}
func build() -> UIAlertController {
let alertController = UIAlertController(
title: title,
message: message,
preferredStyle: style
)
actions.forEach { alertController.addAction($0) }
return alertController
}
}
// MARK: - Project extensions
extension AlertBuilder {
func show(in viewController: UIViewController) {
let alertController = build()
viewController.present(alertController, animated: true)
}
func addCancelAction(title: String,
callback: @escaping () -> Void = {}) -> AlertBuilder {
return addAction(title: title, style: .cancel, callback: callback)
}
func addDefaultAction(title: String,
callback: @escaping () -> Void) -> AlertBuilder {
return addAction(title: title, style: .default, callback: callback)
}
func addDestructiveAction(title: String,
callback: @escaping () -> Void) -> AlertBuilder {
return addAction(title: title, style: .destructive, callback: callback)
}
}
// Usage
AlertBuilder()
.title("Delete project")
.message("Are you sure you want to delete this project?")
.addDestructiveAction(title: "Delete") {
// Handle deletion
}
.addCancelAction(title: "Cancel")
.show(in: self)
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