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textsanitizer.php

<?php
/*
 * $Id: textsanitizer.php,v 1.1.2.1 2003/05/27 00:52:09 mdean Exp $
 *
 * Derived from XOOPS Setup
 *
 * Double Choco Latte - Source Configuration Management System
 * Copyright (C) 1999  Michael L. Dean & Tim R. Norman
 *
 * This file is contributed by Urmet Ja"nes <urmet.janes@proekspert.ee>
 *
 * 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; 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * Select License Info from the Help menu to view the terms and conditions of this license.
 */

set_magic_quotes_runtime(0);

class TextSanitizer
{

      /*
      * Constructor of this class
      * Gets allowed html tags from admin config settings
      * <br> should not be allowed since nl2br will be used
      * when storing data
      */
      function TextSanitizer()
      {

      }

      function &getInstance()
      {
            static $instance;
            if (!isset($instance)) {
                  $instance = new TextSanitizer();
            }
            return $instance;
      }

      function &makeClickable(&$text)
      {
            $patterns = array("/([^]_a-z0-9-=\"'\/])([a-z]+?):\/\/([^, \r\n\"\(\)'<>]+)/i", "/([^]_a-z0-9-=\"'\/])www\.([a-z0-9\-]+)\.([^, \r\n\"\(\)'<>]+)/i", "/([^]_a-z0-9-=\"'\/])([a-z0-9\-_.]+?)@([^, \r\n\"\(\)'<>]+)/i");
            $replacements = array("\\1<a href=\"\\2://\\3\" target=\"_blank\">\\2://\\3</a>", "\\1<a href=\"http://www.\\2.\\3\" target=\"_blank\">www.\\2.\\3</a>", "\\1<a href=\"mailto:\\2@\\3\">\\2@\\3</a>");
            return preg_replace($patterns, $replacements, $text);
      }

      function &nl2Br($text)
      {
            return preg_replace("/(\015\012)|(\015)|(\012)/","<br />",$text);
      }

      function &addSlashes($text, $force=false)
      {
            if ($force) {
                  return addslashes($text);
            }
            if (!get_magic_quotes_gpc()) {
                  $text =& addslashes($text);
            }
            return $text;
      }

      /*
      * if magic_quotes_gpc is on, stirip back slashes
      */
      function &stripSlashesGPC($text)
      {
            if (get_magic_quotes_gpc()) {
                  $text =& stripslashes($text);
            }
            return $text;
      }

      /*
      *  for displaying data in html textbox forms
      */
      function &htmlSpecialChars($text)
      {
            return preg_replace("/&amp;/i", '&', htmlspecialchars($text, ENT_QUOTES));
      }

      function &undoHtmlSpecialChars(&$text)
      {
            return preg_replace(array("/&gt;/i", "/&lt;/i", "/&quot;/i", "/&#039;/i"), array(">", "<", "\"", "'"), $text);
      }

      /*
      *  Filters textarea form data in DB for display
      */
      function &displayText($text, $html=false)
      {
            if (! $html) {
                  // html not allowed
                  $text =& $this->htmlSpecialChars($text);
            }
            $text =& $this->makeClickable($text);
            $text =& $this->nl2Br($text);
            return $text;
      }

      /*
      *  Filters textarea form data submitted for preview
      */
      function &previewText($text, $html=false)
      {
            $text =& $this->stripSlashesGPC($text);
            return $this->displayText($text, $html);
      }

##################### Deprecated Methods ######################

      function sanitizeForDisplay($text, $allowhtml = 0, $smiley = 1, $bbcode = 1)
      {
            if ( $allowhtml == 0 ) {
                  $text = $this->htmlSpecialChars($text);
            } else {
                  //$config =& $GLOBALS['xoopsConfig'];
                  //$allowed = $config['allowed_html'];
                  //$text = strip_tags($text, $allowed);
                  $text = $this->makeClickable($text);
            }
            if ( $smiley == 1 ) {
                  $text = $this->smiley($text);
            }
            if ( $bbcode == 1 ) {
                  $text = $this->xoopsCodeDecode($text);
            }
            $text = $this->nl2Br($text);
            return $text;
      }

      function sanitizeForPreview($text, $allowhtml = 0, $smiley = 1, $bbcode = 1)
      {
            $text = $this->oopsStripSlashesGPC($text);
            if ( $allowhtml == 0 ) {
                  $text = $this->htmlSpecialChars($text);
            } else {
                  //$config =& $GLOBALS['xoopsConfig'];
                  //$allowed = $config['allowed_html'];
                  //$text = strip_tags($text, $allowed);
                  $text = $this->makeClickable($text);
            }
            if ( $smiley == 1 ) {
                  $text = $this->smiley($text);
            }
            if ( $bbcode == 1 ) {
                  $text = $this->xoopsCodeDecode($text);
            }
            $text = $this->nl2Br($text);
            return $text;
      }

      function makeTboxData4Save($text)
      {
            //$text = $this->undoHtmlSpecialChars($text);
            return $this->addSlashes($text);
      }

      function makeTboxData4Show($text, $smiley=0)
      {
            $text = $this->htmlSpecialChars($text);
            return $text;
      }

      function makeTboxData4Edit($text)
      {
            return $this->htmlSpecialChars($text);
      }

      function makeTboxData4Preview($text, $smiley=0)
      {
            $text = $this->stripSlashesGPC($text);
            $text = $this->htmlSpecialChars($text);
            return $text;
      }

      function makeTboxData4PreviewInForm($text)
      {
            $text = $this->stripSlashesGPC($text);
            return $this->htmlSpecialChars($text);
      }

      function makeTareaData4Save($text)
      {
            return $this->addSlashes($text);
      }

      function &makeTareaData4Show(&$text, $html=1, $smiley=1, $xcode=1)
      {
            return $this->displayTarea($text, $html, $smiley, $xcode);
      }

      function makeTareaData4Edit($text)
      {
            return htmlSpecialChars($text, ENT_QUOTES);
      }

      function &makeTareaData4Preview(&$text, $html=1, $smiley=1, $xcode=1)
      {
            return $this->previewTarea($text, $html, $smiley, $xcode);
      }

      function makeTareaData4PreviewInForm($text)
      {
            //if magic_quotes_gpc is on, do stipslashes
            $text = $this->stripSlashesGPC($text);
            return htmlSpecialChars($text, ENT_QUOTES);
      }

      function makeTareaData4InsideQuotes($text)
      {
            return $this->htmlSpecialChars($text);
      }

      function &oopsStripSlashesGPC($text)
      {
            return $this->stripSlashesGPC($text);
      }

      function &oopsStripSlashesRT($text)
      {
            if (get_magic_quotes_runtime()) {
                  $text =& stripslashes($text);
            }
            return $text;
      }

      function &oopsAddSlashes($text)
      {
            return $this->addSlashes($text);
      }

      function &oopsHtmlSpecialChars($text)
      {
            return $this->htmlSpecialChars($text);
      }

      function &oopsNl2Br($text)
      {
            return $this->nl2br($text);
      }
}
?>

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