Package org.cyclop.web.pages.authenticate.wicket

Source Code of org.cyclop.web.pages.authenticate.wicket.SignInPanel

package org.cyclop.web.pages.authenticate.wicket;

import org.apache.wicket.RestartResponseException;
import org.apache.wicket.authentication.IAuthenticationStrategy;
import org.apache.wicket.authentication.strategy.DefaultAuthenticationStrategy;
import org.apache.wicket.authroles.authentication.AuthenticatedWebSession;
import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.html.form.CheckBox;
import org.apache.wicket.markup.html.form.PasswordTextField;
import org.apache.wicket.markup.html.form.StatelessForm;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.markup.html.panel.FeedbackPanel;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.CompoundPropertyModel;
import org.apache.wicket.protocol.http.WebSession;
import org.apache.wicket.settings.ISecuritySettings;

// orginal class coped from wicket extensions with changed visibility of signIn(...,...)
/**
* Reusable user sign in panel with username and password as well as support for persistence of the both. When the
* SignInPanel's form is submitted, the method signIn(String, String) is called, passing the username and password
* submitted. The signIn() method should authenticate the user's session.
*
* @see {@link IAuthenticationStrategy}
* @see {@link ISecuritySettings#getAuthenticationStrategy()}
* @see {@link DefaultAuthenticationStrategy}
* @see {@link WebSession#authenticate(String, String)}
*
* @author Jonathan Locke
* @author Juergen Donnerstag
* @author Eelco Hillenius
*/
public class SignInPanel extends Panel {
  private static final long serialVersionUID = 1L;

  private static final String SIGN_IN_FORM = "signInForm";

  /** True if the panel should display a remember-me checkbox */
  private boolean includeRememberMe = true;

  /** True if the user should be remembered via form persistence (cookies) */
  private boolean rememberMe = true;

  /** password. */
  private String password;

  /** user name. */
  private String username;

  private SignInForm signInForm;
 
  /**
   * @see org.apache.wicket.Component#Component(String)
   */
  public SignInPanel(final String id) {
    this(id, true);
  }

  /**
   * @param id
   *            See Component constructor
   * @param includeRememberMe
   *            True if form should include a remember-me checkbox
   * @see org.apache.wicket.Component#Component(String)
   */
  public SignInPanel(final String id, final boolean includeRememberMe) {
    super(id);

    this.includeRememberMe = includeRememberMe;

    // Create feedback panel and add to page
    add(new FeedbackPanel("feedback"));

    // Add sign-in form to page, passing feedback panel as
    // validation error handler
    signInForm = new SignInForm(SIGN_IN_FORM);
    add(signInForm);
  }

  /**
   *
   * @return signin form
   */
  protected SignInForm getForm() {
    return signInForm;
  }

  /**
   * Try to sign-in with remembered credentials.
   *
   * @see #setRememberMe(boolean)
   */
  @Override
  protected void onConfigure() {
    // logged in already?
    if (isSignedIn() == false) {
      IAuthenticationStrategy authenticationStrategy = getApplication().getSecuritySettings()
          .getAuthenticationStrategy();
      // get username and password from persistence store
      String[] data = authenticationStrategy.load();

      if ((data != null) && (data.length > 1)) {
        // try to sign in the user
        if (signInRemembered(data[0], data[1])) {
          username = data[0];
          password = data[1];

          onSignInRemembered();
        } else {
          // the loaded credentials are wrong. erase them.
          authenticationStrategy.remove();
        }
      }
    }

    super.onConfigure();
  }

  /**
   * Convenience method to access the password.
   *
   * @return The password
   */
  public String getPassword() {
    return password;
  }

  /**
   * Set the password
   *
   * @param password
   */
  public void setPassword(final String password) {
    this.password = password;
  }

  /**
   * Convenience method to access the username.
   *
   * @return The user name
   */
  public String getUsername() {
    return username;
  }

  /**
   * Set the username
   *
   * @param username
   */
  public void setUsername(final String username) {
    this.username = username;
  }

  /**
   * Get model object of the rememberMe checkbox
   *
   * @return True if user should be remembered in the future
   */
  public boolean getRememberMe() {
    return rememberMe;
  }

  /**
   * @param rememberMe
   *            If true, rememberMe will be enabled (username and password will be persisted somewhere)
   */
  public void setRememberMe(final boolean rememberMe) {
    this.rememberMe = rememberMe;
  }

  /**
   * Sign in user if possible.
   *
   * @param username
   *            The username
   * @param password
   *            The password
   * @return True if signin was successful
   */
  protected boolean signIn(String username, String password) {
    return AuthenticatedWebSession.get().signIn(username, password);
  }
 
  private boolean signInRemembered(String username, String password) {
    return AuthenticatedWebSession.get().signIn(username, password);
  }

  /**
   * @return true, if signed in
   */
  private boolean isSignedIn() {
    return AuthenticatedWebSession.get().isSignedIn();
  }

  /**
   * Called when sign in failed
   */
  protected void onSignInFailed() {
    // Try the component based localizer first. If not found try the
    // application localizer. Else use the default
    error(getLocalizer().getString("signInFailed", this, "Sign in failed"));
  }

  /**
   * Called when sign in was successful
   */
  protected void onSignInSucceeded() {
    // If login has been called because the user was not yet logged in, than continue to the
    // original destination, otherwise to the Home page
    continueToOriginalDestination();
    setResponsePage(getApplication().getHomePage());
  }

  /**
   * Called when sign-in was remembered.
   * <p>
   * By default tries to continue to the original destination or switches to the application's home page.
   * <p>
   * Note: This method will be called during rendering of this panel, thus a {@link RestartResponseException} has to
   * be used to switch to a different page.
   *
   * @see #onConfigure()
   */
  protected void onSignInRemembered() {
    // logon successful. Continue to the original destination
    continueToOriginalDestination();

    // Ups, no original destination. Go to the home page
    throw new RestartResponseException(getApplication().getHomePage());
  }

  /**
   * Sign in form.
   */
  public final class SignInForm extends StatelessForm<SignInPanel> {
    private static final long serialVersionUID = 1L;

    /**
     * Constructor.
     *
     * @param id
     *            id of the form component
     */
    public SignInForm(final String id) {
      super(id);

      setModel(new CompoundPropertyModel<SignInPanel>(SignInPanel.this));

      // Attach textfields for username and password
      add(new TextField<String>("username"));
      add(new PasswordTextField("password"));

      // MarkupContainer row for remember me checkbox
      WebMarkupContainer rememberMeRow = new WebMarkupContainer("rememberMeRow");
      add(rememberMeRow);

      // Add rememberMe checkbox
      rememberMeRow.add(new CheckBox("rememberMe"));

      // Show remember me checkbox?
      rememberMeRow.setVisible(includeRememberMe);
    }

    /**
     * @see org.apache.wicket.markup.html.form.Form#onSubmit()
     */
    @Override
    public final void onSubmit() {
      IAuthenticationStrategy strategy = getApplication().getSecuritySettings().getAuthenticationStrategy();

      if (signIn(getUsername(), getPassword())) {
        if (rememberMe == true) {
          strategy.save(username, password);
        } else {
          strategy.remove();
        }

        onSignInSucceeded();
      } else {
        onSignInFailed();
        strategy.remove();
      }
    }
  }
}
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