SignUpViewController

class SignUpViewController: UIViewController, NSURLConnectionDelegate, XMLParserDelegate {

    var mutableData:NSMutableData = NSMutableData()
    var currentElementName:NSString = ""

    @IBOutlet weak var userNameTextField: UITextField!
    @IBOutlet weak var emailTextField: UITextField!
    @IBOutlet weak var passwordTextField: UITextField!
    @IBOutlet weak var confirmPasswordTextField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func alreadyAccountButtonTapped(_ sender: Any) {

        self.dismiss(animated: true, completion: nil)
    }

    @IBAction func signUpButtonTapped(_ sender: Any) {

        let username = userNameTextField.text
        let email = emailTextField.text
        let password = passwordTextField.text
        let repeatPassword = confirmPasswordTextField.text

        if (username!.isEmpty || email!.isEmpty || password!.isEmpty || repeatPassword!.isEmpty ) {

            displayAlertMessage("Tutti i campi sono obbligatori!", "Attenzione!")
        }

        if password != repeatPassword {

            displayAlertMessage("Le password inserite non coincidono!", "Attenzione!")

        }

        // invia i dati tramite HTTP POST

        let soapMessage = "<?xml version='1.0' encoding='UTF-8'?><soapenv:Envelope xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xsd='http://www.w3.org/2001/XMLSchema' xmlns:soapenv='http://schemas.xmlsoap.org/soap/envelope/' xmlns:urn='urn:registerUser'><soapenv:Header/><soapenv:Body><urn:registraUtente soapenv:encodingStyle='http://schemas.xmlsoap.org/soap/encoding/'><username xsi:type='xsd:string'>\(username!)</username><email xsi:type='xsd:string'>\(email!)</email><password xsi:type='xsd:string'>\(password!)</password></urn:registraUtente></soapenv:Body></soapenv:Envelope>"


        let urlString = "http://localhost:8090/StudentPORT_SOAPWS/register.php?wsdl"
        let serviceURL = URL(string: urlString)
        //var request = NSMutableURLRequest(url: serviceURL!)
        var request = URLRequest(url: serviceURL!)
        let messageLength = soapMessage.characters.count

        request.addValue("text/xml; charset=utf-8", forHTTPHeaderField: "Content-Type")
        //request.addValue("text/xml; charset=ISO-8859-1", forHTTPHeaderField: "Content-Type")
        request.addValue(String(messageLength), forHTTPHeaderField: "Content-Length")
        request.httpMethod = "POST"
        request.httpBody = soapMessage.data(using: String.Encoding.utf8, allowLossyConversion: false)

        let session = URLSession.shared

        let task = session.dataTask(with: request){(data: Data?, response: URLResponse?, error: Error?) in

            DispatchQueue.main.async {

                if error != nil {
                    self.displayAlertMessage(error!.localizedDescription, "Errore")
                    return
                }

                if response != nil {

                    self.mutableData.length = 0


                }

                let mutableData : Void = NSMutableData.initialize()

                let dataString = NSString(data: data!, encoding: String.Encoding.utf8.rawValue)
                self.mutableData.append(data!)
                self.displayAlertMessage(dataString as! String, "Alert")
                print(dataString)
                //let user_id = dataString["userID"] as? String




            }

        }
        task.resume()

        let xmlParser = XMLParser(data: mutableData as Data)
        xmlParser.delegate = self
        xmlParser.parse()
        xmlParser.shouldResolveExternalEntities = true




    }


    func displayAlertMessage(_ userMessage: String, _ titleAlert: String){

        let myAlert = UIAlertController(title:titleAlert , message: userMessage, preferredStyle: UIAlertControllerStyle.alert)

        let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil)

        myAlert.addAction(okAction)

        self.present(myAlert, animated: true, completion: nil)
    }

    // NSXMLParserDelegate


    func parser(parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String]) {
        currentElementName = elementName as NSString
    }


    func parser(parser: XMLParser, foundCharacters string: String) {
        if currentElementName == "registraUtenteResponse" {
            self.displayAlertMessage(string, "Alert")
        }
    }

}