ImpressCMS/impresscms

<?php

// ------------------------------------------------------------------------ //
// XOOPS - PHP Content Management System //
// Copyright (c) 2000 XOOPS.org //
// <http://www.xoops.org/> //
// ------------------------------------------------------------------------ //
// 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. //
// //
// You may not change or alter any portion of this comment or credits //
// of supporting developers from this source code or any supporting //
// source code which is considered copyrighted (c) material of the //
// original comment or credit authors. //
// //
// 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 //
// ------------------------------------------------------------------------ //

/**
 * Textsanitizer Class
 *
 * @copyright http://www.xoops.org/ The XOOPS Project
 * @copyright XOOPS_copyrights.txt
 * @copyright http://www.impresscms.org/ The ImpressCMS Project
 * @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU General Public License (GPL)
 * @package installer
 * @since XOOPS
 * @author http://www.xoops.org The XOOPS Project
 * @author modified by UnderDog <underdog@impresscms.org>
 * @version $Id: textsanitizer.php 12329 2013-09-19 13:53:36Z skenow $
 */
// This is subset and modified version of module.textsanitizer.php
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 __construct() {}

    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, $force = false) {
        return addslashes($text);
    }

    /*
     * if magic_quotes_gpc is on, strip back slashes
     */
    function stripSlashesGPC($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 {
            $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 = $this->stripSlashesGPC($text);
        if ($allowhtml == 0) {
            $text = $this->htmlSpecialChars($text);
        } else {
            $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);
    }

    /**
     * Used to check for PHP versions under 7.0 and magic_quotes_runtime
     * Since PHP5.4 it always returned the text passed to it
     */
    function &oopsStripSlashesRT($text) {
        return $text;
    }

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

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

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