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<?php
/**
* @package Joomla.Plugin
* @subpackage Content.emailcloak
*
* @copyright Copyright (C) 2005 - 2015 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('_JEXEC') or die;
/**
* Email cloack plugin class.
*
* @since 1.5
*/
class PlgContentEmailcloak extends JPlugin
{
/**
* Plugin that cloaks all emails in content from spambots via Javascript.
*
* @param string $context The context of the content being passed to the plugin.
* @param mixed &$row An object with a "text" property or the string to be cloaked.
* @param mixed &$params Additional parameters. See {@see PlgContentEmailcloak()}.
* @param integer $page Optional page number. Unused. Defaults to zero.
*
* @return boolean True on success.
*/
public function onContentPrepare($context, &$row, &$params, $page = 0)
{
// Don't run this plugin when the content is being indexed
if ($context == 'com_finder.indexer')
{
return true;
}
if (is_object($row))
{
return $this->_cloak($row->text, $params);
}
return $this->_cloak($row, $params);
}
/**
* Generate a search pattern based on link and text.
*
* @param string $link The target of an email link.
* @param string $text The text enclosed by the link.
*
* @return string A regular expression that matches a link containing the parameters.
*/
protected function _getPattern ($link, $text)
{
$pattern = '~(?:<a ([^>]*)href\s*=\s*"mailto:' . $link . '"([^>]*))>' . $text . '</a>~i';
return $pattern;
}
/**
* Adds an attributes to the js cloaked email.
*
* @param string $jsEmail Js cloaked email.
* @param string $before Attributes before email.
* @param string $after Attributes after email.
*
* @return string Js cloaked email with attributes.
*/
protected function _addAttributesToEmail($jsEmail, $before, $after)
{
if ($before !== "")
{
$before = str_replace("'", "\'", $before);
$jsEmail = str_replace(".innerHTML += '<a '", ".innerHTML += '<a {$before}'", $jsEmail);
}
if ($after !== "")
{
$after = str_replace("'", "\'", $after);
$jsEmail = str_replace("'\'>'", "'\'{$after}>'", $jsEmail);
}
return $jsEmail;
}
/**
* Cloak all emails in text from spambots via Javascript.
*
* @param string &$text The string to be cloaked.
* @param mixed &$params Additional parameters. Parameter "mode" (integer, default 1)
* replaces addresses with "mailto:" links if nonzero.
*
* @return boolean True on success.
*/
protected function _cloak(&$text, &$params)
{
/*
* Check for presence of {emailcloak=off} which is explicits disables this
* bot for the item.
*/
if (JString::strpos($text, '{emailcloak=off}') !== false)
{
$text = JString::str_ireplace('{emailcloak=off}', '', $text);
return true;
}
// Simple performance check to determine whether bot should process further.
if (JString::strpos($text, '@') === false)
{
return true;
}
$mode = $this->params->def('mode', 1);
// Example: any@example.org
$searchEmail = '([\w\.\-\+]+\@(?:[a-z0-9\.\-]+\.)+(?:[a-zA-Z0-9\-]{2,10}))';
// Example: any@example.org?subject=anyText
$searchEmailLink = $searchEmail . '([?&][\x20-\x7f][^"<>]+)';
// Any Text
$searchText = '((?:[\x20-\x7f]|[\xA1-\xFF]|[\xC2-\xDF][\x80-\xBF]|[\xE0-\xEF][\x80-\xBF]{2}|[\xF0-\xF4][\x80-\xBF]{3})[^<>]+)';
// Any Image link
$searchImage = "(<img[^>]+>)";
// Any Text with <span or <strong
$searchTextSpan = '(<span[^>]+>|<span>|<strong>|<strong><span[^>]+>|<strong><span>)' . $searchText . '(</span>|</strong>|</span></strong>)';
// Any address with <span or <strong
$searchEmailSpan = '(<span[^>]+>|<span>|<strong>|<strong><span[^>]+>|<strong><span>)' . $searchEmail . '(</span>|</strong>|</span></strong>)';
/*
* Search and fix derivatives of link code <a href="http://mce_host/ourdirectory/email@example.org"
* >email@example.org</a>. This happens when inserting an email in TinyMCE, cancelling its suggestion to add
* the mailto: prefix...
*/
$pattern = $this->_getPattern($searchEmail, $searchEmail);
$pattern = str_replace('"mailto:', '"http://mce_host([\x20-\x7f][^<>]+/)', $pattern);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[3][0];
$mailText = $regs[5][0];
// Check to see if mail text is different from mail addy
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText);
// Ensure that attributes is not stripped out by email cloaking
$replacement = $this->_addAttributesToEmail($replacement, $regs[1][0], $regs[4][0]);
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search and fix derivatives of link code <a href="http://mce_host/ourdirectory/email@example.org"
* >anytext</a>. This happens when inserting an email in TinyMCE, cancelling its suggestion to add
* the mailto: prefix...
*/
$pattern = $this->_getPattern($searchEmail, $searchText);
$pattern = str_replace('"mailto:', '"http://mce_host([\x20-\x7f][^<>]+/)', $pattern);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[3][0];
$mailText = $regs[5][0];
// Check to see if mail text is different from mail addy
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText, 0);
// Ensure that attributes is not stripped out by email cloaking
$replacement = $this->_addAttributesToEmail($replacement, $regs[1][0], $regs[4][0]);
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code <a href="mailto:email@example.org"
* >email@example.org</a>
*/
$pattern = $this->_getPattern($searchEmail, $searchEmail);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[2][0];
$mailText = $regs[4][0];
// Check to see if mail text is different from mail addy
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText);
// Ensure that attributes is not stripped out by email cloaking
$replacement = $this->_addAttributesToEmail($replacement, $regs[1][0], $regs[3][0]);
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code <a href="mailto:email@amail.com"
* ><anyspan >email@amail.com</anyspan></a>
*/
$pattern = $this->_getPattern($searchEmail, $searchEmailSpan);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[2][0];
$mailText = $regs[4][0] . $regs[5][0] . $regs[6][0];
// Check to see if mail text is different from mail addy
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText);
// Ensure that attributes is not stripped out by email cloaking
$replacement = html_entity_decode($this->_addAttributesToEmail($replacement, $regs[1][0], $regs[3][0]));
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code <a href="mailto:email@amail.com">
* <anyspan >anytext</anyspan></a>
*/
$pattern = $this->_getPattern($searchEmail, $searchTextSpan);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[2][0];
$mailText = $regs[4][0] . addslashes($regs[5][0]) . $regs[6][0];
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText, 0);
// Ensure that attributes is not stripped out by email cloaking
$replacement = html_entity_decode($this->_addAttributesToEmail($replacement, $regs[1][0], $regs[3][0]));
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code <a href="mailto:email@example.org">
* anytext</a>
*/
$pattern = $this->_getPattern($searchEmail, $searchText);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[2][0];
$mailText = addslashes($regs[4][0]);
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText, 0);
// Ensure that attributes is not stripped out by email cloaking
$replacement = $this->_addAttributesToEmail($replacement, $regs[1][0], $regs[3][0]);
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code <a href="mailto:email@example.org">
* <img anything></a>
*/
$pattern = $this->_getPattern($searchEmail, $searchImage);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[2][0];
$mailText = $regs[4][0];
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText, 0);
// Ensure that attributes is not stripped out by email cloaking
$replacement = html_entity_decode($this->_addAttributesToEmail($replacement, $regs[1][0], $regs[3][0]));
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code <a href="mailto:email@example.org">
* <img anything>email@example.org</a>
*/
$pattern = $this->_getPattern($searchEmail, ($searchImage . $searchEmail));
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[2][0];
$mailText = $regs[4][0] . ($regs[5][0]);
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText);
// Ensure that attributes is not stripped out by email cloaking
$replacement = html_entity_decode($this->_addAttributesToEmail($replacement, $regs[1][0], $regs[3][0]));
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code <a href="mailto:email@example.org">
* <img anything>any text</a>
*/
$pattern = $this->_getPattern($searchEmail, ($searchImage . $searchText));
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[2][0];
$mailText = $regs[4][0] . addslashes($regs[5][0]);
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText, 0);
// Ensure that attributes is not stripped out by email cloaking
$replacement = html_entity_decode($this->_addAttributesToEmail($replacement, $regs[1][0], $regs[3][0]));
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code <a href="mailto:email@example.org?
* subject=Text">email@example.org</a>
*/
$pattern = $this->_getPattern($searchEmailLink, $searchEmail);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[2][0] . $regs[3][0];
$mailText = $regs[5][0];
// Needed for handling of Body parameter
$mail = str_replace('&amp;', '&', $mail);
// Check to see if mail text is different from mail addy
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText);
// Ensure that attributes is not stripped out by email cloaking
$replacement = $this->_addAttributesToEmail($replacement, $regs[1][0], $regs[4][0]);
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code <a href="mailto:email@example.org?
* subject=Text">anytext</a>
*/
$pattern = $this->_getPattern($searchEmailLink, $searchText);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[2][0] . $regs[3][0];
$mailText = addslashes($regs[5][0]);
// Needed for handling of Body parameter
$mail = str_replace('&amp;', '&', $mail);
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText, 0);
// Ensure that attributes is not stripped out by email cloaking
$replacement = $this->_addAttributesToEmail($replacement, $regs[1][0], $regs[4][0]);
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code <a href="mailto:email@amail.com?subject= Text"
* ><anyspan >email@amail.com</anyspan></a>
*/
$pattern = $this->_getPattern($searchEmailLink, $searchEmailSpan);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[2][0] . $regs[3][0];
$mailText = $regs[4][0] . $regs[5][0] . $regs[6][0] . $regs[7][0];
// Check to see if mail text is different from mail addy
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText);
// Ensure that attributes is not stripped out by email cloaking
$replacement = html_entity_decode($this->_addAttributesToEmail($replacement, $regs[1][0], $regs[3][0]));
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code <a href="mailto:email@amail.com?subject= Text">
* <anyspan >anytext</anyspan></a>
*/
$pattern = $this->_getPattern($searchEmailLink, $searchTextSpan);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[2][0] . $regs[3][0];
$mailText = $regs[4][0] . $regs[5][0] . addslashes($regs[6][0]) . $regs[7][0];
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText, 0);
// Ensure that attributes is not stripped out by email cloaking
$replacement = html_entity_decode($this->_addAttributesToEmail($replacement, $regs[1][0], $regs[3][0]));
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code
* <a href="mailto:email@amail.com?subject=Text"><img anything></a>
*/
$pattern = $this->_getPattern($searchEmailLink, $searchImage);
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[1][0] . $regs[2][0] . $regs[3][0];
$mailText = $regs[5][0];
// Needed for handling of Body parameter
$mail = str_replace('&amp;', '&', $mail);
// Check to see if mail text is different from mail addy
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText, 0);
// Ensure that attributes is not stripped out by email cloaking
$replacement = html_entity_decode($this->_addAttributesToEmail($replacement, $regs[1][0], $regs[4][0]));
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code
* <a href="mailto:email@amail.com?subject=Text"><img anything>email@amail.com</a>
*/
$pattern = $this->_getPattern($searchEmailLink, ($searchImage . $searchEmail));
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[1][0] . $regs[2][0] . $regs[3][0];
$mailText = $regs[4][0] . $regs[5][0] . $regs[6][0];
// Needed for handling of Body parameter
$mail = str_replace('&amp;', '&', $mail);
// Check to see if mail text is different from mail addy
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText);
// Ensure that attributes is not stripped out by email cloaking
$replacement = html_entity_decode($this->_addAttributesToEmail($replacement, $regs[1][0], $regs[4][0]));
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
/*
* Search for derivatives of link code
* <a href="mailto:email@amail.com?subject=Text"><img anything>any text</a>
*/
$pattern = $this->_getPattern($searchEmailLink, ($searchImage . $searchText));
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[1][0] . $regs[2][0] . $regs[3][0];
$mailText = $regs[4][0] . $regs[5][0] . addslashes($regs[6][0]);
// Needed for handling of Body parameter
$mail = str_replace('&amp;', '&', $mail);
// Check to see if mail text is different from mail addy
$replacement = JHtml::_('email.cloak', $mail, $mode, $mailText, 0);
// Ensure that attributes is not stripped out by email cloaking
$replacement = html_entity_decode($this->_addAttributesToEmail($replacement, $regs[1][0], $regs[4][0]));
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[0][1], strlen($regs[0][0]));
}
// Search for plain text email@example.org
$pattern = '~' . $searchEmail . '([^a-z0-9]|$)~i';
while (preg_match($pattern, $text, $regs, PREG_OFFSET_CAPTURE))
{
$mail = $regs[1][0];
$replacement = JHtml::_('email.cloak', $mail, $mode);
// Replace the found address with the js cloaked email
$text = substr_replace($text, $replacement, $regs[1][1], strlen($mail));
}
return true;
}
}
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