/*
    * This software was designed and created by Jason Carroll.
    * Copyright (c) 2002, 2003, 2004 Jason Carroll.
    * The author can be reached at jcarroll@cowsultants.com
    * ITracker website: http://www.cowsultants.com
    * ITracker forums: http://www.cowsultants.com/phpBB/index.php
    *
    * This program is free software; you can redistribute it and/or modify
    * it only under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * 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 org.itracker.services.util;
  
  import java.text.DateFormat;
  import java.text.SimpleDateFormat;
  import java.util.StringTokenizer;
  
  import org.apache.log4j.Logger;
  import org.apache.oro.text.regex.MalformedPatternException;
  import org.apache.oro.text.regex.Pattern;
  import org.apache.oro.text.regex.PatternCompiler;
  import org.apache.oro.text.regex.Perl5Compiler;
  import org.apache.oro.text.regex.Perl5Matcher;
  import org.apache.oro.text.regex.Perl5Substitution;
  import org.apache.oro.text.regex.Util;
  
  public class HTMLUtilities {
      
      private static final Logger logger = Logger.getLogger(HTMLUtilities.class);
      private static Perl5Matcher matcher = new Perl5Matcher();
      private static PatternCompiler compiler = new Perl5Compiler();
      private static Pattern pattern = null;
  
      static {
          try {
              pattern = compiler.compile("<[\\w/].*?>", Perl5Compiler.CASE_INSENSITIVE_MASK);
          } catch(MalformedPatternException mpe) {
              logger.error("Invalid pattern in HTMLUtilities. " + mpe.getMessage());
          }
      }
  
      public static String removeQuotes(String input) {
          StringBuffer sb = new StringBuffer(input.length());
          int len = input.length();
          char c;
  
          for(int i = 0; i < len; i++) {
              c = input.charAt(i);
              if (c == '\'') {
                  sb.append("''");
              } else {
                  sb.append(c);
              }
          }
          return sb.toString();
      }
  
      public static String handleQuotes(String input) {
          if(input == null || "".equals(input) || input.indexOf('"') == -1) {
              return input;
          }
  
          StringBuffer buf = new StringBuffer();
  
          char[] chars = input.toCharArray();
          for(int i = 0; i < chars.length; i++) {
              if(chars[i] == '"') {
                  buf.append("&quot;");
              } else {
                  buf.append(chars[i]);
              }
          }
  
          return buf.toString();
      }
  
       public static String escapeNewlines(String input) {
          if(input == null || "".equals(input) || input.indexOf('\n') == -1) {
              return input;
          }
  
          StringBuffer buf = new StringBuffer();
          char[] chars = input.toCharArray();
          for(int i = 0; i < chars.length; i++) {
              if(chars[i] == '\r') {
                  continue;
              } else if(chars[i] == '\n') {
                  buf.append("\\n");
              } else {
                  buf.append(chars[i]);
              }
          }
         return buf.toString();
     }
 
      public static String newlinesToBreaks(String input) {
         if(input == null || "".equals(input) || input.indexOf('\n') == -1) {
             return input;
         }
 
         StringBuffer buf = new StringBuffer();
         char[] chars = input.toCharArray();
         for(int i = 0; i < chars.length; i++) {
             if(chars[i] == '\r') {
                 continue;
             } else if(chars[i] == '\n') {
                 buf.append("<br>");
             } else {
                 buf.append(chars[i]);
             }
         }
         return buf.toString();
     }
 
     public static String removeMarkup(String input) {
         String output = (input == null ? "" : input);
 
         if(pattern != null && matcher != null && output != null && ! output.equals("")) {
             output = Util.substitute(matcher, pattern, new Perl5Substitution(), output, Util.SUBSTITUTE_ALL);
         } else {
             logger.debug("Failed removing markup.  Pattern = " + pattern + "   Output = " + output);
         }
 
         return output;
     }
 
     public static String escapeTags(String input) {
         StringBuffer sb = new StringBuffer(input.length());
         int len = input.length();
         char c;
 
         for(int i = 0; i < len; i++) {
             c = input.charAt(i);
             if (c == '"') {
                 sb.append("&quot;");
             } else if (c == '&') {
                 sb.append("&amp;");
             } else if (c == '<') {
                 sb.append("&lt;");
             } else if (c == '>') {
                 sb.append("&gt;");
             } else {
                 int ci = 0xffff & c;
                 if (ci < 160 ) {
                     // nothing special only 7 Bit
                     sb.append(c);
                 } else {
                     // Not 7 Bit use the unicode system
                     sb.append("&#");
                     sb.append(new Integer(ci).toString());
                     sb.append(';');
                 }
             }
         }
 
         return sb.toString();
     }
     
     /**
      * format a itracker date format for scal datepicker
      * 
      * @see http://scal.fieldguidetoprogrammers.com
      * 
      * @param format
      * @return
      */
     public static final String getJSDateFormat(String format) {
     	
     	
     	String f = format.replace('m', 'n'); 
     		
     		
     	f = format.toLowerCase();
     	
     	return f;
 
     	
     }
     
 }