/*  $Id: configMode.java,v 1.14 2001/04/23 03:15:31 agarcia3 Exp $ 
    webEditor. The new way in content management
    Copyright (C) 2001  Alfredo Garcia

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
*/

package webEditor.interfaces;

import java.io.*;
import java.lang.reflect.*;
import java.util.*;

import javax.servlet.*;
import javax.servlet.http.*;
import org.w3c.dom.*;

import webEditor.util.*;
import webEditor.core.*;

/**
 * Configuration interface; This class shows the page with the editor parameters
 * @author <a href="mailto:agarcia@mundofree.com">Alfredo Garcia
 */

public class configMode {

   /**
    * Configuration values
    */
   private configuration initValues;

   /**
    * Editor root 
    */
   private String wEd_root;

   /**
    * Path for the data configuration files 
    */
   private String dataDir;
   
   /**
    * Path for the XSL template files
    */
   private String tplDir;

   /**
    * Configuration parser
    */
   private xml_parser confParser= null;

   /**
    * Presentation Management
    */
   private presentation myEditor= null;

   /**
    * Class constructor
    * @param initParam		Initial values
    */
    public configMode (configuration initParam) { 
	
	this.initValues = initParam;
	this.wEd_root   = initParam.readValue ("webEditor_Root","wEd_root");

	this.dataDir    = initParam.readValue ("directories","dataDir");
	this.dataDir    = this.wEd_root + "/" + this.dataDir;

	this.tplDir     = initParam.readValue ("directories","tplDir");
	this.tplDir     = this.dataDir + "/" + this.tplDir;
    }
    
   /**
    * Operations over the configuration values
    * @param request		HTTP request
    * @param out		Servlet Output
    * @return void
    */
    public void showConfig (HttpServletRequest request, PrintWriter out) 
    throws ServletException, 
    	   IOException {

	String outputString = "";
	this.confParser = new xml_parser ();
	this.myEditor = new presentation (this.initValues);	

	String opCode = this.initValues.readValue ("HTTP Parameters", "code");
	if (opCode == null) {
		// Default operation mode
		opCode = "show";
	}

try { 
	// We use reflection to invoque the proper method
	Method m = getClass().getMethod(opCode, new Class[] {HttpServletRequest.class, PrintWriter.class} ); 
	m.invoke(this,new Object[] {request, out}); 
} 
catch (Exception e) { 
	out.println ("Code not supported");
} 

    }
    
   /**
    * Edition of the configuration values
    * @param request		HTTP request
    * @param out		Servlet Output
    * @return void
    */
    public void edit (HttpServletRequest request, PrintWriter out)
	throws ServletException, IOException 
    {
    	String action = this.initValues.readValue ("HTTP Parameters", "action");
	if (action == null) {
		action = "show";
	}
	configuration configValues = null;
	if ( action.equals ("Save") ) {
		// We load into the config hash the http parameters
		Hashtable http_params = this.initValues.readCategory ("HTTP Parameters");

		configValues = new configuration (this.wEd_root + "/general.xml");
		Document oldConfig = this.confParser.writeDOM ("general", 
					configValues.returnData());
		// And then, we write the new http values ...
		oldConfig = configValues.writeDoc (http_params, oldConfig);
		configValues.saveConfig (this.wEd_root + "/general.xml", oldConfig);
	}

	configValues = new configuration (this.wEd_root + "/general.xml");
	Document doc = this.confParser.writeDOM ("general", configValues.returnData());
	String outputString = this.myEditor.showConfigEditor (doc);

	out.println (outputString);
    }

   /**
    * Simple configuration presentation
    * @param request		HTTP request
    * @param out		Servlet Output
    * @return void
    */
    public void show (HttpServletRequest request, PrintWriter out)
	throws ServletException, IOException 
    {
	// With the content of the hash table, build a DOM tree
	Document doc = this.confParser.writeDOM ("general", this.initValues.returnData());
	String outputString = this.myEditor.showConfig (doc);
	out.println (outputString);
    }

}