/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *         http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.argeo.slc.client.ui.dist.wizards;
  
  import javax.jcr.security.Privilege;
  
  import org.eclipse.jface.wizard.WizardPage;
  import org.eclipse.swt.SWT;
  import org.eclipse.swt.events.ModifyEvent;
  import org.eclipse.swt.events.ModifyListener;
  import org.eclipse.swt.layout.GridData;
  import org.eclipse.swt.layout.GridLayout;
  import org.eclipse.swt.widgets.Combo;
  import org.eclipse.swt.widgets.Composite;
  import org.eclipse.swt.widgets.Label;
  import org.eclipse.swt.widgets.Text;
  
  public class ChooseRightsPage extends WizardPage implements ModifyListener {
  	private static final long serialVersionUID = 3016024222014878781L;
  
  	// This page widget
  	private Text groupNameTxt;
  	private Combo authorizationCmb;
  
  	// Define acceptable chars for the technical name
  	// private static Pattern p = Pattern.compile("^[A-Za-z0-9]+$");
  
  	// USABLE SHORTCUTS
  	protected final static String[] validAuthType = { Privilege.JCR_READ,
  			Privilege.JCR_WRITE, Privilege.JCR_ALL };
  
  	public ChooseRightsPage() {
  		super("Main");
  		setTitle("Manage authorizations on the current workspace");
  	}
  
  	public void createControl(Composite parent) {
  		// specify subject
  		Composite composite = new Composite(parent, SWT.NONE);
  		composite.setLayout(new GridLayout(2, false));
  		Label lbl = new Label(composite, SWT.LEAD);
  		lbl.setText("Group or user name (no blank, no special chars)");
  		lbl.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false));
  		groupNameTxt = new Text(composite, SWT.LEAD | SWT.BORDER);
  		groupNameTxt.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true,
  				false));
  		if (groupNameTxt != null)
  			groupNameTxt.addModifyListener(this);
  
  		// Choose rigths
  		new Label(composite, SWT.NONE).setText("Choose corresponding rights");
  		authorizationCmb = new Combo(composite, SWT.BORDER | SWT.V_SCROLL);
  		authorizationCmb.setItems(validAuthType);
  		GridData gd = new GridData(GridData.FILL_HORIZONTAL);
  		authorizationCmb.setLayoutData(gd);
  
  		authorizationCmb.select(0);
  
  		// Compulsory
  		setControl(composite);
  	}
  
  	protected String getGroupName() {
  		return groupNameTxt.getText();
  	}
  
  	protected String getAuthTypeStr() {
  		return authorizationCmb.getItem(authorizationCmb.getSelectionIndex());
  	}
  
  	// private static boolean match(String s) {
  	// return p.matcher(s).matches();
  	// }
  
  	public void modifyText(ModifyEvent event) {
  		String message = checkComplete();
  		if (message != null)
  			setMessage(message, WizardPage.ERROR);
  		else {
  			setMessage("Complete", WizardPage.INFORMATION);
  			setPageComplete(true);
  		}
  	}
  
  	/** @return error message or null if complete */
  	protected String checkComplete() {
 		String groupStr = groupNameTxt.getText();
 		if (groupStr == null || "".equals(groupStr))
 			return "Please enter the name of the corresponding group.";
 		// Remove regexp check for the time being.
 		// else if (!match(groupStr))
 		// return
 		// "Please use only alphanumerical chars for the short technical name.";
 		return null;
 	}
 }