Support for SwiftUI #107
Description
When using the Sumup SDK in a SwiftUI app, the usage is a bit cumbersome, because the API assumes you have a UIViewController handy which you usually don't have in a SwiftUI app. It would be nice if the SDK would provide a SwiftUI wrapper or accessible UIViewController classes that can be wrapped with UIViewControllerRepresentable.
A workaround to make it work today - SumupView can be embedded in the SwiftUI view hierarchy to make the Sumup login/checkout controller appear:
import SumUpSDK
import SwiftUI
class SumupPaymentJob {
let request: CheckoutRequest
let completion: (_ paid: Bool) -> Void
init(api_key: String, request: CheckoutRequest, completion: @escaping (_ paid: Bool) -> Void) {
SumUpSDK.setup(withAPIKey: api_key)
self.request = request
self.completion = completion
}
}
class SumupViewController: UIViewController {
let paymentJob: SumupPaymentJob
init(paymentJob: SumupPaymentJob) {
self.paymentJob = paymentJob
super.init(nibName: nil, bundle: nil)
}
@available(*, unavailable)
required init?(coder: NSCoder) {
fatalError("init(coder:) not supported")
}
func login() {
SumUpSDK.presentLogin(from: self, animated: false) { success, error in
if success {
self.purchase()
} else {
self.paymentJob.completion(false)
}
}
}
func purchase() {
SumUpSDK.checkout(with: self.paymentJob.request, from: self) { result, error in
self.paymentJob.completion(result?.success ?? false)
}
}
var started = false
override func viewWillAppear(_ animated: Bool) {
if !self.started {
self.started = true
if !SumUpSDK.isLoggedIn {
self.login()
} else {
self.purchase()
}
}
}
}
struct SumupView: UIViewControllerRepresentable {
let paymentJob: SumupPaymentJob
func makeUIViewController(context: Context) -> UIViewController {
SumupViewController(paymentJob: self.paymentJob)
}
func updateUIViewController(_ uiViewController: UIViewController, context: Context) {}
}