/*
    * Copyright 2010 James Pether Sörling
    *
    * 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.
   *
   *	$Id$
   *  $HeadURL$
  */
  package com.hack23.cia.web.impl.ui.page.admin;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.InputStreamReader;
  
  import org.vaadin.console.Console;
  import org.vaadin.console.Console.Command;
  import org.vaadin.navigator7.Page;
  
  import com.vaadin.ui.VerticalLayout;
  
  /**
   * The Class ConsolePage.
   */
  @Page(uriName = "console",crawlable=true)
  @SuppressWarnings("serial")
  public final class ConsolePage extends AbstractAdminPage {
  
  	/** The content. */
  	private final VerticalLayout content = new VerticalLayout();
  
  	/**
  	 * Instantiates a new console page.
  	 */
  	public ConsolePage() {
  		super();
  		content.setSizeFull();
  		content.setMargin(true);
  		content.setSpacing(true);
  		setCompositionRoot(content);
  
  		// Create a console
  		final Console console = new Console();
  		content.addComponent(console);
  		console.setPs("}> ");
  		console.setCols(68);
  		console.setRows(20);
  		console.setMaxBufferSize(20);
  		console.setGreeting("Welcome.");
  		console.reset();
  		console.focus();
  
  		final Command systemCommand = new Command() {
  		    private static final long serialVersionUID = -5733237166568671987L;
  
  			@Override
  			public Object execute(final Console console, final String[] argv)
  					throws Exception {
  				  final Process p = Runtime.getRuntime().exec(argv);
  			        final InputStream in = p.getInputStream();
  			        final StringBuilder o = new StringBuilder();
  			        final InputStreamReader r = new InputStreamReader(in);
  			        int c = -1;
  			        try {
  			            while ((c = r.read()) != -1) {
  			                o.append((char) c);
  			            }
  			        } catch (final IOException e) {
  			            o.append("[truncated]");
  			        }
  			        return o.toString();
  			}
  
  			@Override
  			public String getUsage(final Console console, final String[] argv) {
  				return null;
  			}
  		};
  
  		console.addCommand("free", systemCommand);
  
  
  		setHeight(getScreenHeight());
  	}
  
  	/* (non-Javadoc)
  	 * @see com.hack23.cia.web.impl.ui.page.common.AbstractPage#getPageTitle()
  	 */
  	@Override
  	public String getPageTitle() {
 		return "";
 	}
 
 }