package org.argeo.cms.ui.workbench.rap;
   
   import java.security.PrivilegedAction;
   import java.util.Locale;
   
   import javax.security.auth.Subject;
   import javax.security.auth.x500.X500Principal;
   import javax.servlet.http.HttpServletRequest;
   import javax.servlet.http.HttpServletResponse;
  
  import org.argeo.cms.CmsMsg;
  import org.argeo.cms.auth.CurrentUser;
  import org.argeo.cms.util.CmsUtils;
  import org.argeo.cms.util.LoginEntryPoint;
  import org.eclipse.rap.rwt.RWT;
  import org.eclipse.rap.rwt.client.service.JavaScriptExecutor;
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.events.SelectionListener;
  import org.eclipse.swt.widgets.Button;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Display;
  import org.eclipse.ui.PlatformUI;
  
  public class SpnegoWorkbenchLogin extends LoginEntryPoint {
  	// private final static Log log =
  	// LogFactory.getLog(RapWorkbenchLogin.class);
  
  	/** Override to provide an application specific workbench advisor */
  	protected RapWorkbenchAdvisor createRapWorkbenchAdvisor(String username) {
  		return new RapWorkbenchAdvisor(username);
  	}
  
  	@Override
  	public int createUI() {
  		HttpServletRequest request = RWT.getRequest();
  		String authorization = request.getHeader(HEADER_AUTHORIZATION);
  		if (authorization == null || !authorization.startsWith("Negotiate")) {
  			HttpServletResponse response = RWT.getResponse();
  			response.setStatus(401);
  			response.setHeader(HEADER_WWW_AUTHENTICATE, "Negotiate");
  			response.setDateHeader("Date", System.currentTimeMillis());
  			response.setDateHeader("Expires", System.currentTimeMillis() + (24 * 60 * 60 * 1000));
  			response.setHeader("Accept-Ranges", "bytes");
  			response.setHeader("Connection", "Keep-Alive");
  			response.setHeader("Keep-Alive", "timeout=5, max=97");
  			// response.setContentType("text/html; charset=UTF-8");
  		}
  
  		int returnCode;
  		returnCode = super.createUI();
  		return returnCode;
  	}
  
  	@Override
  	protected int postLogin() {
  		Subject subject = getSubject();
  		final Display display = Display.getCurrent();
  		if (subject.getPrincipals(X500Principal.class).isEmpty()) {
  			RWT.getClient().getService(JavaScriptExecutor.class).execute("location.reload()");
  		}
  		//
  		// RUN THE WORKBENCH
  		//
  		Integer returnCode = null;
  		try {
  			returnCode = Subject.doAs(subject, new PrivilegedAction<Integer>() {
  				public Integer run() {
  					int result = createAndRunWorkbench(display, CurrentUser.getUsername(subject));
  					return new Integer(result);
  				}
  			});
  			// explicit workbench closing
  			logout();
  		} finally {
  			display.dispose();
  		}
  		return returnCode;
  	}
  
  	protected int createAndRunWorkbench(Display display, String username) {
  		RapWorkbenchAdvisor workbenchAdvisor = createRapWorkbenchAdvisor(username);
  		return PlatformUI.createAndRunWorkbench(display, workbenchAdvisor);
  	}
  
  	@Override
  	protected void extendsCredentialsBlock(Composite credentialsBlock, Locale selectedLocale,
  			SelectionListener loginSelectionListener) {
  //		Button loginButton = new Button(credentialsBlock, SWT.PUSH);
  //		loginButton.setText(CmsMsg.login.lead(selectedLocale));
  //		loginButton.setLayoutData(CmsUtils.fillWidth());
  //		loginButton.addSelectionListener(loginSelectionListener);
  	}
  
  	@Override
  	protected Display createDisplay() {
  		return PlatformUI.createDisplay();
  	}
  
  }