path: root/dozentenmodul/src/main/java/gui/intro/Login_GUI.java

package gui.intro;

import java.awt.Color;
import java.awt.Component;
import java.awt.Image;
import java.awt.SystemColor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.concurrent.ExecutionException;

import javax.swing.ButtonGroup;
import javax.swing.DefaultComboBoxModel;
import javax.swing.DefaultListCellRenderer;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.SwingWorker;
import javax.swing.UIManager;
import javax.swing.border.EmptyBorder;
import javax.swing.border.TitledBorder;

import models.SessionData;
import models.person;

import org.apache.log4j.Logger;
import org.apache.thrift.TException;
import org.openslx.imagemaster.thrift.iface.ImageServer;
import org.openslx.imagemaster.thrift.iface.OrganizationData;
import org.openslx.imagemaster.thrift.iface.UserInfo;
import org.openslx.sat.thrift.version.Version;
import org.openslx.thrifthelper.ThriftManager;

import util.GuiManager;
import util.ResourceLoader;
import util.ShibbolethECP;
import config.Config;

@SuppressWarnings("serial")
public class Login_GUI extends JInternalFrame {

	/**
	 * Logger instance for this class.
	 */
	private final static Logger LOGGER = Logger.getLogger(Login_GUI.class);
	// String constants representing the different login methods
	private final static String LOGIN_TYPE_BWIDM = "bwidm";
	private final static String LOGIN_TYPE_BWLEHRPOOL = "bwlp";
	private final static String LOGIN_TYPE_SATELLITE = "sat";

	private JPanel contentPane;
	private JTextField lblusername;
	private JPasswordField lblpass;
	private JLabel lblConnectionInfo = new JLabel("");
	private JCheckBox chckbxBenutzernameSpeichern;

	private JPanel panel;
	private JPanel panel_1;
	private JLabel LabelUser;
	private JLabel LabelPass;

	// radio button and group for login types.
	private ButtonGroup bgLoginType;
	private JRadioButton rdbtnBwIDM;
	private JRadioButton rdbtnDirekteVerbindung;
	private JRadioButton rdbtnMasterserver;
	// its action listener
	private ActionListener loginTypeActionListener;

	// bwIDM label and dropdown
	private JComboBox<OrganizationData> idpChoice;
	private JLabel lblIdp;
	private List<OrganizationData> organizations;

	// Satellite IP label and text field
	private JLabel lblSatellitenIp;
	private JTextField lblSatIP;

	/**
	 * Create the frame.
	 */
	public Login_GUI() {
		// Titel des Fensters setzen
		setTitle("bwLehrpool Suite");

		// Größe setzen und mittig ausrichten
		setBounds(0, 0, 785, 430);

		// Erzeugen eines Panels
		contentPane = new JPanel();
		// Hintergrund Farbe des Panels setzen
		contentPane.setBackground(SystemColor.menu);
		// Rahmen des Fensters setzen
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		// Layout setzen
		contentPane.setLayout(null);
		// Label fuer das Logo erzeugen
		JLabel imgLabel = new JLabel();
		// Groesse und Position des Logos festelegen
		imgLabel.setBounds(231, 11, 350, 142);
		// Pfadangabe des Logos

		ImageIcon icon = ResourceLoader.getIcon("/img/Logo_bwLehrpool.png", "Logo");
		// Skalierung des Logos
		Image scaled = icon.getImage().getScaledInstance(270, 64, 0);
		imgLabel.setIcon(new ImageIcon(scaled));
		// Hinzufuegen des Logos in das Fenster
		contentPane.add(imgLabel);

		lblConnectionInfo.setHorizontalAlignment(SwingConstants.LEFT);
		lblConnectionInfo.setBounds(10, 359, 449, 20);
		lblConnectionInfo.setEnabled(true);
		lblConnectionInfo.setText("Info: Bereit für Login");

		contentPane.add(lblConnectionInfo);

		// Erzeugen, Hinzufuegen und definierung der Aktion des Buttons
		JButton BtnLogin = new JButton("Login");
		BtnLogin.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				performLogin(bgLoginType.getSelection().getActionCommand());
			}// end actionPerformed
		});

		BtnLogin.setBounds(488, 358, 239, 23);
		contentPane.add(BtnLogin);

		// Start of the actual content of the right panel
		panel = new JPanel();
		panel.setLayout(null);
		panel.setBorder(new TitledBorder(null, "Zugangsdaten", TitledBorder.LEADING, TitledBorder.TOP, null,
				null));
		panel.setBackground(SystemColor.menu);
		panel.setBounds(354, 143, 400, 181);
		contentPane.add(panel);

		chckbxBenutzernameSpeichern = new JCheckBox("Benutzername speichern");
		chckbxBenutzernameSpeichern.setBounds(135, 137, 237, 23);
		chckbxBenutzernameSpeichern.setSelected(Config.getSaveUsername());
		panel.add(chckbxBenutzernameSpeichern);

		// Erzeugen und Hinzufuegen des Labels
		LabelUser = new JLabel("Benutzername:");
		LabelUser.setBounds(25, 60, 82, 20);
		panel.add(LabelUser);
		
		// Erzeugen und Hinzufuegen des Textfeldes
		lblusername = new JTextField();
		lblusername.setBounds(135, 60, 237, 20);
		lblusername.setToolTipText("Bitte geben Sie Ihren bwIDM-Benutzernamen ein.");
		lblusername.setColumns(10);
		// Lese Benutzername aus der Konfigurationsdatei
		lblusername.setText(Config.getUsername());
		lblusername.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				performLogin(bgLoginType.getSelection().getActionCommand());
			}
		});
		panel.add(lblusername);

		// Erzeugen und Hinzufuegen des Labels
		LabelPass = new JLabel("Passwort:");
		LabelPass.setBounds(25, 85, 82, 20);
		panel.add(LabelPass);

		// Erzeugen und Hinzufuegen des Passwortfeldes
		lblpass = new JPasswordField();
		lblpass.setBounds(135, 85, 237, 20);
		lblpass.setToolTipText("Bitte geben Sie Ihr bwIDM-Passwort ein.");
		lblpass.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				performLogin(bgLoginType.getSelection().getActionCommand());
			}
		});
		panel.add(lblpass);

		lblSatellitenIp = new JLabel("Satelliten IP:");
		lblSatellitenIp.setBounds(25, 105, 82, 20);
		// panel.add(lblSatellitenIp);

		lblSatIP = new JTextField();
		lblSatIP.setBounds(135, 110, 237, 20);
		lblSatIP.setToolTipText("Bitte geben Sie die IP-Adresse des Satelliten ein.");
		// panel.add(lblSatIP);

		idpChoice = new JComboBox<OrganizationData>();
		idpChoice.setBounds(135, 35, 237, 20);
		// panel.add(choice);

		lblIdp = new JLabel("IdP:");
		lblIdp.setBounds(25, 35, 82, 20);
		// panel.add(lblIdp);

		// action listener for the radio buttons to
		// toggle the gui elements depending on the login type
		loginTypeActionListener = new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				toggleLoginType(e.getActionCommand());
			}
		};

		panel_1 = new JPanel();
		panel_1.setLayout(null);
		panel_1.setBorder(new TitledBorder(UIManager.getBorder("TitledBorder.border"),
				"Authentifizierungsart", TitledBorder.LEADING, TitledBorder.TOP, null, new Color(0, 0, 0)));
		panel_1.setBackground(SystemColor.menu);
		panel_1.setBounds(10, 143, 334, 181);
		contentPane.add(panel_1);

		// group radio button for the login type together
		bgLoginType = new ButtonGroup();

		rdbtnBwIDM = new JRadioButton("Authentifizierung über bwIDM");
		rdbtnBwIDM.setBounds(32, 35, 244, 23);
		rdbtnBwIDM.setActionCommand(LOGIN_TYPE_BWIDM);
		rdbtnBwIDM.addActionListener(loginTypeActionListener);
		bgLoginType.add(rdbtnBwIDM);
		panel_1.add(rdbtnBwIDM);

		rdbtnMasterserver = new JRadioButton("Test-Zugang mit festem Benutzer");
		rdbtnMasterserver.setSelected(true);
		rdbtnMasterserver.setActionCommand(LOGIN_TYPE_BWLEHRPOOL);
		rdbtnMasterserver.addActionListener(loginTypeActionListener);
		rdbtnMasterserver.setBounds(32, 60, 244, 23);
		bgLoginType.add(rdbtnMasterserver);
		panel_1.add(rdbtnMasterserver);

		rdbtnDirekteVerbindung = new JRadioButton("Direkte Verbindung zum Satelliten");
		rdbtnDirekteVerbindung.setBounds(32, 85, 244, 23);
		rdbtnDirekteVerbindung.setActionCommand(LOGIN_TYPE_SATELLITE);
		rdbtnDirekteVerbindung.addActionListener(loginTypeActionListener);
		rdbtnDirekteVerbindung.setEnabled(false);
		bgLoginType.add(rdbtnDirekteVerbindung);
		panel_1.add(rdbtnDirekteVerbindung);

		panel.setVisible(true);
		panel_1.setVisible(true);
		contentPane.setVisible(true);

	}// end LoginGUI()

	// Versuche den Benutzer einzuloggen
	public void performLogin(final String loginType) {
		LOGGER.info("Trying login of type: " + loginType);

		if (loginType == LOGIN_TYPE_BWLEHRPOOL) {

			// start the authentication process against the masterserver
			org.openslx.imagemaster.thrift.iface.SessionData result = null;
			// Connect to Master
			ImageServer.Iface client = ThriftManager.getMasterClient();
			String passText = new String(lblpass.getPassword());
			UserInfo user = null;
			// Log user in
			try {
				setStatus(Color.black, "Authentifiziere - warte auf Antwort von Server...", null);

				result = client.authenticate(lblusername.getText(), passText);

				// Sanity checks
				if (result.authToken == null || result.sessionId == null) {
					setStatus(Color.red, "Antwort des Masterservers korrupt.", null);
					LOGGER.info("Antwort des Masterservers korrupt");
					return;
				}

				// User-Info
				LOGGER.info("Authentifizierung von '" + lblusername.getText() + "' erfolgreich.");
				user = client.getUserFromToken(result.authToken);

			} catch (org.openslx.imagemaster.thrift.iface.AuthenticationException e) {
				setStatus(Color.red, "Fehler: Zugangsdaten nicht akzeptiert.",
						"Benutzeranmeldung fehlgeschlagen: Bitte Benutzername und Passwort überprüfen.\n"
								+ e.message);
				e.printStackTrace();
				return;
			} catch (TException e) {
				e.printStackTrace();
				setStatus(Color.red, "Kommunikation mit Masterserver fehlgeschlagen.", null);
				LOGGER.error("Thrift-communication to the masterserver failed, see trace: ", e);
				return;
			}

			// set Information
			SessionData.authToken = result.authToken;
			SessionData.sessionID = result.sessionId;
			SessionData.serverAdress = result.serverAddress;
			if (!ThriftManager.setSatellite(result.serverAddress)) {
				LOGGER.error("Setting satellite IP to '"
						+ result.serverAddress
						+ "' failed. Appears to be empty. Is the satellite IP returned from masterserver correct?");
				setStatus(Color.green, "IP vom Satelliten ungültig.", null);
				System.exit(1);
			}

			// User-Info
			setStatus(Color.green, "Daten erhalten.", null);

			String hochschule = user.eMail.substring(user.eMail.indexOf("@") + 1);

			person.verantwortlicher.setUsername(lblusername.getText().trim());
			person.verantwortlicher.setUserID(lblusername.getText().trim());
			person.verantwortlicher.setName(user.lastName);
			person.verantwortlicher.setVorname(user.firstName);
			person.verantwortlicher.setEMail(user.eMail);
			person.verantwortlicher.setHochschule(hochschule);

			// Spaeter ueber result.getRole zum Beispiel die Rolle holen
			if (lblusername.getText().trim().startsWith("admin@")) {
				person.verantwortlicher.setRole("Admin");
			} else {
				person.verantwortlicher.setRole("Dozent");
				// person.verantwortlicher.setRole("Student");
			}
			postLogin();

			// }
		} // end bwLehrpool-Login

		if (loginType == LOGIN_TYPE_BWIDM) {
			// try the shibbo login in its own SwingWorker to avoid GUI lockups
			SwingWorker<ShibbolethECP.ReturnCode, String> worker = new SwingWorker<ShibbolethECP.ReturnCode, String>() {
				@Override
				protected ShibbolethECP.ReturnCode doInBackground() throws Exception {
					publish("Info: Initialisiere Shibboleth-Client ...");
					OrganizationData selectedOrg = (OrganizationData) idpChoice.getSelectedItem();
					publish("Info: Überprüfe Zugangdaten über bwIDM ...");
					return ShibbolethECP.doLogin(selectedOrg.getEcpUrl(), lblusername.getText().trim(),
							String.valueOf(lblpass.getPassword()));
				}

				protected void done() {
					try {
						ShibbolethECP.ReturnCode ecpReturn = get();
						switch (ecpReturn) {
						case NO_ERROR:
							setStatus(Color.green, "Info: bwIDM-Anmeldung erfolgreich.", null);
							/*
							 * Login successful
							 */
							person.verantwortlicher.setUsername(lblusername.getText().trim());
							person.verantwortlicher.setUserID(lblusername.getText().trim());
							person.verantwortlicher.setName(ShibbolethECP.getResponse().lastName);
							person.verantwortlicher.setVorname(ShibbolethECP.getResponse().firstName);
							person.verantwortlicher.setEMail(ShibbolethECP.getResponse().mail);
							person.verantwortlicher.setHochschule(((OrganizationData) idpChoice
									.getSelectedItem()).getOrganizationId());
							person.verantwortlicher.setRole("Dozent");
							ThriftManager.setSatellite(ShibbolethECP.getResponse().satellites.get("default"));
							SessionData.serverAdress = ShibbolethECP.getResponse().satellites.get("default");
							SessionData.authToken = ShibbolethECP.getResponse().token;
							SessionData.sessionID = ShibbolethECP.getResponse().sessionId;

							/*
							 * Now postprocess successful login
							 */
							postLogin();
							break;
						case ERROR_IDP:
							setStatus(Color.red, "Fehler: bwIDM-Anmeldung fehlgeschlagen!", null);
							JOptionPane
									.showMessageDialog(
											null,
											"Anmeldung fehlgeschlagen. Überprüfen Sie den Benutzername und Passwort.",
											"Fehler", JOptionPane.ERROR_MESSAGE);
							break;
						case ERROR_UNREG:
							setStatus(Color.red, "Fehler: Nicht bei bwLehrpool registriert!", null);
							JOptionPane.showMessageDialog(null,
									"Sie sind nicht bei bwLehrpool registriert.\nGehen Sie dazu auf folgende Seite:\n"
											+ ShibbolethECP.getRegistrationUrl(), "Fehler",
									JOptionPane.ERROR_MESSAGE);
							break;
						case ERROR_SP:
							setStatus(Color.red, "Fehler: bwIDM-Anmeldung fehlgeschlagen!", null);
							JOptionPane
									.showMessageDialog(
											null,
											"Anmeldung erfolgreich aber die Antwort des Service Providers ist ungültig.",
											"Fehler", JOptionPane.ERROR_MESSAGE);
							break;
						case ERROR_OTHER:
							setStatus(Color.red, "Fehler: bwIDM-Anmeldung fehlgeschlagen!", null);
							JOptionPane.showMessageDialog(null,
									"Fataler Fehler. Schicken Sie die Log-Datei einem Administrator zu!",
									"Fehler", JOptionPane.ERROR_MESSAGE);
							break;
						default:
							setStatus(Color.red, "Fehler: bwIDM-Login fehlgeschlagen!", null);
						}
					} catch (InterruptedException e) {
						LOGGER.error("SwingWorker for ShibbolethECP got interrupted, see trace: ", e);
					} catch (ExecutionException e) {
						LOGGER.error("Execution of SwingWorker for ShibbolethECP failed, see trace: ", e);
					}
				}

				@Override
				protected void process(List<String> msgs) {
					String currentMessage = msgs.get(msgs.size() - 1);
					setStatus(Color.black, currentMessage, null);
				}
			};
			worker.execute();
		}

		// always save to user's config file.
		if (chckbxBenutzernameSpeichern.isSelected()) 
		{
			Config.setUsername(lblusername.getText());
			Config.setSaveUsername(true);
			Config.setIdP(String.valueOf(idpChoice.getSelectedIndex()));
		} else 
		{
			Config.setUsername("");
			Config.setSaveUsername(false);
			Config.setIdP(String.valueOf(0));
		}
		// save it to local disk
		Config.store();

	}// end performLogin

	/**
	 * Common function for either authentication method
	 */
	private void postLogin() {
		// Version check
		long remoteVersion;
		try {
			remoteVersion = ThriftManager.getSatClient().getVersion();
			LOGGER.info("Satellite RPC version: " + remoteVersion);
		} catch (Exception e) {
			LOGGER.error(
					"Could not query sat server version after successful connect! Assuming untagged version 1",
					e);
			remoteVersion = 1;
		}
		String text = null;
		if (remoteVersion > Version.VERSION) {
			text = "Das von Ihnen verwendete Dozentenmodul ist zu alt, um mit dem Satelliten-Server zu verbinden.\n"
					+ "Sie verwenden Version "
					+ Version.VERSION
					+ ", der Satellit "
					+ remoteVersion
					+ "\n"
					+ "Aktuelle Version unter http://bwlehrpool.hs-offenburg.de/";
		} else if (remoteVersion < Version.VERSION) {
			text = "Das von Ihnen verwendete Dozentenmodul ist zu neu, um mit dem Satelliten-Server zu verbinden.\n"
					+ "Sie verwenden Version " + Version.VERSION + ", der Satellit " + remoteVersion;
		}
		if (text != null) {
			JOptionPane.showMessageDialog(null, text, "Fehler", JOptionPane.ERROR_MESSAGE);
		}

		LOGGER.debug("Post-processing login ...");
		// TODO here do all the session data stuff
		// TODO and the telling the sat Server who we are
		LOGGER.debug("Checking token: " + SessionData.authToken);
		try {
			boolean authenticated = ThriftManager.getSatClient().authenticated(SessionData.authToken);
			if (!authenticated) {
				JOptionPane.showMessageDialog(null, "Sessionübergabe an den Satelliten fehlgeschlagen.",
						"Fehler", JOptionPane.ERROR_MESSAGE);
				return;
			}
			String pk_institution = ThriftManager.getSatClient().setInstitution(
					person.verantwortlicher.getHochschule(), SessionData.authToken);
			ThriftManager.getSatClient().setPerson(person.verantwortlicher.getUserID(),
					SessionData.authToken, pk_institution);
		} catch (TException e) {
			JOptionPane.showMessageDialog(null, "Unerwarteter Fehler.\n\n" + e.toString(), "Fehler",
					JOptionPane.ERROR_MESSAGE);
			LOGGER.error("Unexpected exception", e);
			return;
		}

		// at the end
		showMainMenu();
	}

	/**
	 * Shows the next GUI's til the main menu. It checks if the user has already
	 * seen the bill of rights and/or the vmware license windows and shows them
	 * before continuing to the main menu.
	 * 
	 * This function should be called on a successful login.
	 */
	private void showMainMenu() {
		/**
		 * 
		 * DISPLAY LICENSES / MAIN MENU
		 * 
		 */
		if (!Config.getBillOfRights()) {
			// display bill of rights?
			GuiManager.show(new BillOfRights_GUI(), true);
		} else {
			// display vmware license?
			if (!Config.getVmwareLicense()) {
				GuiManager.show(new VmWareLink_GUI(), true);
			} else {
				// main menu
				GuiManager.show(new MainMenue_GUI(), true);
			}
		}
	}

	/**
	 * Set connection status message, optionally show message box.
	 * 
	 * @param color
	 *            Color to display status message in.
	 * @param shortMessage
	 *            The message to display.
	 * @param longMessage
	 *            Optional message to show in a message box. null means don't
	 *            show.
	 */
	private void setStatus(Color color, String shortMessage, String longMessage) {
		LOGGER.info(shortMessage);
		lblConnectionInfo.setForeground(color);
		lblConnectionInfo.setText(shortMessage);
		if (longMessage != null)
			JOptionPane.showMessageDialog(null, longMessage, "Anmeldung fehlgeschlagen",
					JOptionPane.ERROR_MESSAGE);
	}

	/**
	 * Toggle the elements needed for the different login types.
	 * 
	 * @param type
	 *            Type of the login to toggle. Valid are: - LOGIN_TYPE_BWIDM -
	 *            LOGIN_TYPE_BWLEHRPOOL - LOGIN_TYPE_SATELLITE
	 */
	private void toggleLoginType(String type) {
		LOGGER.info("Toggling to login method to: " + type);
		panel.setVisible(false);
		switch (type) {
		case LOGIN_TYPE_BWIDM:
			initIdpList();
			panel.remove(lblSatIP);
			panel.remove(lblSatellitenIp);
			panel.add(idpChoice);
			panel.add(lblIdp);
			panel.add(LabelPass);
			lblpass.setText("");
			lblpass.setToolTipText("Bitte geben Sie Ihr bwIDM-Passwort ein.");
			panel.add(lblpass);
			lblusername.setToolTipText("Bitte geben Sie Ihren bwIDM-Benutzernamen ein.");
			panel.revalidate();
			panel.repaint();
			panel.setVisible(true);
			break;
		case LOGIN_TYPE_BWLEHRPOOL:
			panel.remove(idpChoice);
			panel.remove(lblIdp);
			panel.remove(lblSatIP);
			panel.remove(lblSatellitenIp);
			panel.add(LabelPass);
			lblpass.setToolTipText("Bitte geben Sie Ihr bwLehrpool-Passwort ein.");
			panel.add(lblpass);
			lblusername.setToolTipText("Bitte geben Sie Ihr bwLehrpool-Benutzername ein.");
			panel.revalidate();
			panel.repaint();
			panel.setVisible(true);
			break;
		case LOGIN_TYPE_SATELLITE:
			panel.remove(idpChoice);
			panel.remove(lblIdp);
			panel.remove(LabelPass);
			panel.remove(lblpass);
			lblSatIP.setBounds(135, 85, 237, 20);
			lblSatIP.setText("");
			panel.add(lblSatIP);
			lblSatellitenIp.setBounds(25, 85, 82, 20);
			panel.add(lblSatellitenIp);
			panel.revalidate();
			panel.repaint();
			panel.setVisible(true);
			setStatus(Color.black, "Info: Bereit für bwIDM-Login", null);
			break;
		default:
			panel.setVisible(true);
			return;
		}
	}

	/**
	 * Request the list of identity providers from the masterserver and display
	 * them in a combobox.
	 */
	private void initIdpList() {
		// abort if we fetched the list already.
		if (organizations != null) {
			return;
		} else {
			organizations = new ArrayList<OrganizationData>();
		}
		LOGGER.info("Fetching list of identity providers from masterserver...");
		SwingWorker<Boolean, String> worker = new SwingWorker<Boolean, String>() {
			@Override
			protected Boolean doInBackground() throws Exception {
				publish("Info: Hole Liste von IdPs");
				// if not then request it from the masterserver
				List<OrganizationData> tempOrgs = null;
				try {
					tempOrgs = ThriftManager.getMasterClient().getOrganizations();
				} catch (TException e) {
					LOGGER.error(
							"Could not fetch list of identity providers from the masterserver, see trace: ",
							e);
					return false;
				}
				// safety check to see if we got any organizations at all
				if (tempOrgs != null) {
					// now add those with an Ecp URL to the result list.
					for (OrganizationData org : tempOrgs) {
						if (org.getEcpUrl() != null && !org.getEcpUrl().isEmpty()) {
							organizations.add(org);
							LOGGER.debug("Valid IdP: " + org.toString());
						} else {
							LOGGER.debug("Skipped bad organization (no ECPUrl): " + org.toString());
						}
					}
					// now we build the list, lets sort it
					Collections.sort(organizations, new Comparator<OrganizationData>() {
						@Override
						public int compare(OrganizationData o1, OrganizationData o2) {
							return o1.displayName.compareTo(o2.displayName);
						}
					});
				} else {
					LOGGER.error("Thrift call of 'getOrganizations()' seems to have worked, but 'organizations' is still null.");
					LOGGER.error("Is the API of the masterserver working correctly?");
					return false;
				}
				publish("Info: Liste von IdPs empfangen.");
				
				return true;
			}

			protected void done() {
				try {
					if (get()) {
						// fill the combobox with the IdPs returned from the
						// masterserver
						OrganizationData[] orgs = organizations.toArray(new OrganizationData[] {});
						idpChoice.setModel(new DefaultComboBoxModel<OrganizationData>(orgs));
						// now override the renderer, to show the display names
						// of the organizations.
						idpChoice.setRenderer(new DefaultListCellRenderer() 
						{
							@Override
							public Component getListCellRendererComponent(JList<?> list, Object value,
									int index, boolean isSelected, boolean cellHasFocus) {
								super.getListCellRendererComponent(list, value, index, isSelected,
										cellHasFocus);
								if (value instanceof OrganizationData) {
									OrganizationData org = (OrganizationData) value;
									setText(org.getDisplayName());
								}
								return this;
							}
						});
						
						setStatus(Color.black, "Info: Bereit für Login", null);
					} else {
						setStatus(Color.red, "Fehler: Vorbereitung für bwIDM-Login fehlgeschlagen!", null);
					}
				} catch (InterruptedException e) {
					LOGGER.error("SwingWorker for 'getOrganizationsList' got interrupted, see trace: ", e);
				} catch (ExecutionException e) {
					LOGGER.error("Execution of SwingWorker for 'getOrganizationsList' failed, see trace: ", e);
				}
				
				if(Config.getIdP() != -1)
				{
					idpChoice.setSelectedIndex(Config.getIdP()); //set IdP preselction to saved value, if stored. 0 is default
				}
			}

			@Override
			protected void process(List<String> msgs) {
				String currentMessage = msgs.get(msgs.size() - 1);
				setStatus(Color.black, currentMessage, null);
			}
		};
		worker.execute();
	}
}// end class