/* this belongs to the WebRaveler package */
package webraveler.plugin;

import java.util.*;  

import webraveler.http.HTTPResponse;
import webraveler.ravel.PluginAPI;
import webraveler.ravel.Raveler;
import webraveler.vurl.HelpVURL;

/**
 * When the page returned in a response is for www.grinnellplans.com,
 * insert a link the user's directory page next to the username
 *
 * @author The Web Raveler Development Squad
 * @version 1.0
 */
public class PlanstalkerPlugin extends webraveler.ravel.RavelerPlugin {
  /* variables */
  String fullURL;
  byte[] imageBytes;
  
  /* constructors */
  
  /**
   * The default constructor, called from WebRaveler2.Raveler 
   */
   public PlanstalkerPlugin() {
     name = "PlanstalkerPlugin";
     mimeTypes.add("text/html");
     
//         /* let's load the image at instantiation time */
//         System.out.println("PlanstalkerPlugin: Getting monkeyFace image byte array.");
//         File image = new File("monkeyFace.jpg");
// 	FileInputStream imageIn; 
// 
// 	try {
//             imageIn = new FileInputStream(image);
// 	}catch (IOException ioe) { 
// 		throw new Exception("PlanstalkerPlugin: couldn't get monkeyFace image file.");
// 	}//catch
// 
//         ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
//         int input;
//         while( (input = imageIn.read()) != -1 ) {
//                byteStream.write(input); /* write the input byte to the stream... inefficient, but who cares at instantiation time? */
//         }
//         
// 	imageBytes = byteStream.toByteArray();
//      
// 	/* cache a response for this image */
// 	HTTPResponse imageResponse = new HTTPResponse();
// 	imageResponse.localHeaders = new Hashtable();
// 	imageResponse.localHeaders.put("content-type","image/jpeg");
// 	imageResponse.status = 200;
// 	imageResponse.reasonPhrase = "OK";
// 	imageResponse.localHeaders.put("content-length",""+imageBytes.length);
	
   }
  
  /* methods */

  /**
   * Start executing the plugin when given a response
   *
   * @param response an HTTPResponse with the response to be modified
   * @return an HTTPResponse object, the result of running the plugin on the input response
   */
  public HTTPResponse execute(HTTPResponse response, Hashtable attributes) {
//    	  System.out.println("PlanstalkerPlugin: executing.");
//	  String username = new String();
//	  String text = new String();
//          for ( Enumeration e = response.getHtmlPage().getTextBlocks() ; e.hasMoreElements() ; ) {
//               text = (String) e.nextElement();
//               if ( text.equals("Plan of:") ) {
//                    /* the next text block has the username.  modify it accordingly */
//                    System.out.println("THE NEXT TEXT BLOCK IS THE USERNAME!!!!!");
//                    text = (String) e.nextElement();
//                    username = text.toString();
//                    System.out.println("username = '"+username+"'"); 
//		    String searchResultsURL = "http://db.grinnell.edu/campusdir/default.asp?transmit=true&blackboardref=false&LastName=&LNameSearch=startswith&FirstName=&FNameSearch=startswith&email="+username+"&campusphonenumber=&campusquery=&Homequery=&Department=&Major=&Gyear=&submit_search=Find";
//                    text = "<a href=\""+searchResultsURL+"\" target=\"_blank\">" + text + "</a>";
//		    
//		    /* now, let's get the response for the search result page via
//		     * ProxyClient, then find the href tag that starts with 
//		     * "displaydata.asp," and get THAT response.  Then all we 
//		     * need to do is find the image link, get it, cache it, and
//		     * link to the cached copy */
//		    HTTPResponse dirResponse;
//		    HTTPRequest dirRequest = HTTPRequest.generateGetRequest(searchResultsURL);
//		    ProxyClient dirProxy = new ProxyClient(dirRequest);
//		    System.out.println("Getting Response for search results page");
//		    try { 
//		        dirResponse = dirProxy.getResponse();
//		    } catch ( IOException ioe ) { return response; }
//		    
//		    System.out.println("Finding right href element in search results.");
//		    /* find the href starting with "displaydata.asp" */
//		    for ( Enumeration f = dirResponse.getHtmlPage().getAttributesByName("href").elements() ; f.hasMoreElements() ; ) {
//		        Vector attribute = (Vector) f.nextElement();
//			String value = ( (StringBuffer) attribute.lastElement() ).toString();
//			System.out.println("value = '"+value+"'");
//			if ( value.startsWith("\"displaydata.asp") ) {
//			    String userPageURL = "http://db.grinnell.edu/campusdir/"+value.substring(1,value.length()-1);
//			    dirRequest = HTTPRequest.generateGetRequest(userPageURL);
//			    dirProxy = new ProxyClient(dirRequest);
//			    
//			    System.out.println("Getting response for user data page");
//		            try { 
//		                dirResponse = dirProxy.getResponse();
//		            } catch ( IOException ioe ) { return response; }	
//			    
//			    System.out.println("Finding right img tag in the response");
//			    /* find the img tag, and steal the link */  
//			    Vector imgTags = dirResponse.htmlPage.getTagsByName("img");
//			    Vector userImageTag;
//			    try { 
//			    	userImageTag = (Vector) imgTags.elementAt(5); 
//			    } catch ( NoSuchElementException nsee ) {
//				return response;
//			    }
//			    
//			    /* we have the tag. . . so steal the link */
//			    System.out.println("USERIMAGETAG = '"+userImageTag.toString()+"'");
//			    Vector srcVec = (Vector) userImageTag.elementAt(1);
//			    String srcVal = ((StringBuffer) srcVec.lastElement()).toString();
//			    if( srcVal.endsWith("gone.jpg\"") ) {
//			       text.append("</td></tr></table>\n<table><tr><td>Directory image:</td><td>Unavailable<b>");
//			       return response;
//			    }
//			    System.out.println("image src = '"+srcVal+"'");
//			    String srcURL = "http://temp.webraveler2.getunframeddocument/getunframeddocument!http://db.grinnell.edu/campusdir/"+srcVal.substring(1,srcVal.length()-1);
//			    
//			    text.append("</td></tr></table>\n<table><tr><td><p class=\"main2\">Directory image:</p></td><td><img src=\""+srcURL+"\"><b>");
//			    
//			    return response;
//			}//if    
//				 
//		      }//for
//	              text.append("</td></tr></table><table><td><tr><p class=\"main2\">PlanstalkerPlugin:</p> No directory info found for "+username+"");
//    	              System.out.println("PlanstalkerPlugin: done."); 
//		      break;
//	            }//if
//		}//for    
     	  return response;
  }
  
  /**
   * Do the setup stuff with Raveler - banner setup, etc.
   * Put the plugin on Raveler's "plugin vector"
   */
  public boolean initialize() {
    /* some helpful HTML to display to the user */
    String helpfulHTML = new String();
    helpfulHTML += "<html><head>"+Raveler.ravelerCSS+"<title>WebRaveler2 :: PlanstalkerPlugin Help Page</title></head>";
    helpfulHTML += "<body><p class='level1'>PlanstalkerPlugin :: Help</p>";
    helpfulHTML += "<p><h3><ul><li> ";
    helpfulHTML += "This plugin will eventually open a popup window when you visit a person's plan.  That";
    helpfulHTML += " popup will contain the person's stalkerNet information, as per db.grinnell.edu/campusdir.";
    helpfulHTML += "</li></h3>";
    helpfulHTML += "</p></body></html>";

    HelpVURL help = new HelpVURL(helpfulHTML);
    fullURL = PluginAPI.addHelpVirtualURL(ravel,name,help);
    return true;
  }
  
  /**
   * Terminate the Plugin - Hasta la vista, BABY!
   */
  public void terminate() {
  }
  



  /**
   * Return the default configuration for this plugin as a hash table. 
   *
   */
  public void setDefaultAttributes() {
     attributes = new Hashtable();
  }
    
} //class RavelerPlugin