Stripe Chipper terminal test

ViewController.swift

import UIKit
import StripeTerminal
import Alamofire

let BACKEND_SERVER_URL = "Our token server url"

class ViewController: UIViewController, DiscoveryDelegate, ReaderDisplayDelegate {
    
    @IBOutlet weak var tokenButton: UIButton!
    @IBOutlet weak var tokenDisplay: UITextView!
    @IBOutlet weak var readerID: UITextField!
    @IBOutlet weak var inputOptionsLabel: UILabel!
    @IBOutlet weak var messageLabel: UILabel!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        self.readerID.text = "reader ID:"
        let config = DiscoveryConfiguration(deviceType: .chipper2X, discoveryMethod: .bluetoothProximity, simulated: true)
        Terminal.shared.discoverReaders(config, delegate: self as DiscoveryDelegate, completion: { error in
            if (error != nil) {
                print(error!)
            }
        })
    }

    @IBAction func buttonPressed(sender: UIButton) {
        let params = PaymentIntentParameters(amount: 4950, currency: "cad")
        Terminal.shared.createPaymentIntent(params) { paymentIntent, error  in
            if let error = error {
                print(error)
            }
            Terminal.shared.collectPaymentMethod(paymentIntent!, delegate: self) { paymentIntent, error in
                if let paymentIntent = paymentIntent {
                    // Placeholder for processing paymentIntent
                    Terminal.shared.processPayment(paymentIntent) { paymentIntent, error in
                        if let paymentIntent = paymentIntent {
                            print(paymentIntent.stripeId)
                            AF.request(BACKEND_SERVER_URL, method: .post, parameters: ["payment_intent_id": paymentIntent.stripeId], encoding: JSONEncoding.default)
                                .response { response in
                                    switch response.result {
                                        case .success:
                                            print("success...")
                                        case .failure(let error):
                                            print("error....", error)
                                    }
                            }
                        }
                        else if let error = error {
                            print("payment intent error: ", error)
                            
                        }
                    }
                }
                else if let error = error {
                    print(error)
                }
            }
        }
    }
    
    // MARK: DiscoveryDelegate
    func terminal(_ terminal: Terminal, didUpdateDiscoveredReaders readers: [Reader]) {
        // Display the discovered readers to the user
        self.readerID.text = "reader ID: " + readers[0].serialNumber
        let reader = readers[0]
        Terminal.shared.connectReader(reader, completion: {reader,error in print("reader connected", reader as Any)
            if let error = error {
                print(error)
            } else {
                self.tokenButton.setTitle("Make test payment of $49.50", for: .normal)
            }
        })
    }
    
    func terminal(_ terminal: Terminal, didRequestReaderInput options: ReaderInputOptions) {
        inputOptionsLabel.text = Terminal.stringFromReaderInputOptions(options)
    }
    
    func terminal(_ terminal: Terminal, didRequestReaderDisplayMessage message: ReaderDisplayMessage) {
        messageLabel.text = Terminal.stringFromReaderDisplayMessage(message)
    }
}