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

import java.util.*;


import webraveler.http.HTTPRequest;
import webraveler.http.HTTPResponse;
import webraveler.ravel.Raveler;
import webraveler.ravel.RavelerException;
import webraveler.ravel.RavelerPlugin;
import webraveler.ravel.RavelerUser;

/**
 * Enables the given set of plugins
 * 
 * @author The Web Raveler Development Squad
 * @version 1.0
 */
public class PluginsEnabled implements VURL {

	/**
	 *
	 */
	public PluginsEnabled () {
		
	} // PluginSequenceVURL()
	
	/**
	 * Updates the status of the specified plugins.    
	 * Returns a response indicating whether or not the operation was successful
	 */
	public HTTPResponse resolveVURL(String username, String query,  HTTPRequest request,Raveler ravel) {
		/* Get the RavelerUser for the given username */
		RavelerUser user = new RavelerUser();
		String message = new String();
		try {
			user = ravel.getUser(username);
			/* Parse the query */
			/* First check if all the plugins should be enabled */
			String allTest = null;
			if (query != null && !query.equals("")) 
				allTest = query.substring(0,3);
			if (allTest != null && allTest.equals("all")) {
				/* Enable all the plugins */
				for (Enumeration f = ravel.getPlugins(); f.hasMoreElements() ;) {
					RavelerPlugin plugin = (RavelerPlugin) f.nextElement();
					if (user.getStatus(plugin.name).equals("disabled")) {
						user.setStatus(plugin.name,"inactive");
					} //if
				} //for
			} //if
			else {
				/* Enable only the specified plugins */
				int equalsIndex;
				int amperIndex=0;
				String pluginName;
				Hashtable pref;
				while ((equalsIndex = query.indexOf('=',amperIndex)) != -1) {
					/* Check if we are past the first part, if so increment the
					* amperIndex so that we don't include the & in the pluginName */
					if (amperIndex != 0)
						amperIndex++;
					pluginName = query.substring(amperIndex,equalsIndex);
					/* Change the status of the plugin to inactive in the preferences for the user */
					user.setStatus(pluginName,"inactive"); 
					amperIndex = query.indexOf('&',equalsIndex);
					/* Check if we are at the last part, if so, stop */
					if (amperIndex == -1) 
						break;
				} //while
			} //else
			message = "<p class='message'>The specified plugins were enabled</p>";
		} catch (RavelerException re) {
		    message = "<p class='message'>"+re.getMessage()+"</p>"; 
		} //catch
		/* Generate the response - include the user configuration page with note about plugins activated being changed */
		UserConfigVURL userConfig = new UserConfigVURL();
		userConfig.printMessage(message);
		HTTPResponse response = userConfig.resolveVURL(username,query,request,ravel);
		return response;
	} //resolveVURL
}