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http://www.miraclesalad.com/webtools/clip.php?clip=2eca

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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE extension SYSTEM "ext-1.0.dtd">

<!--
/**
 * ChatLite: Adds a javascript chat to the forum.
 * Please note the licence DOES NOT apply to prototype's framework supplied with this extension. 
 *
 * @author Neck - http://www.eikylon.net 
 * @license Creative Commons Attribution 3.0 Unported - http://creativecommons.org/licenses/by/3.0/
 * @package ek_chatlite 
 */
-->

<extension engine="1.0">
	<id>ek_chatlite</id>
	<title>ChatLite</title>
	<version>0.6.0</version>
	<description>Adds a javascript chat to the forum index.</description>
	<author>Neck - http://www.eikylon.net, Modified by slickplaid</author>
	<minversion>1.3</minversion>
	<maxtestedon>1.3.2</maxtestedon>

	<install><![CDATA[

// check the PHP version
if(version_compare(PHP_VERSION, '5.2.1') === -1) {
	$notices[] = '<strong>ERROR !</strong> PHP 5.2.1 or superior required ('.PHP_VERSION.' found). This extension cannot be run on your server, please uninstall it.';
}
// check write access on some files
if(!is_writable($ext_info['path'].'/data/chat.dat') || !is_writable($ext_info['path'].'/data/.htaccess')) {
	$notices[] = '<strong>WARNING !</strong> Write access needed. Please give php the permission to write in <em>ek_chatlite/data/chat.dat</em> and <em>ek_chatlite/data/.htaccess</em> before running the chat.';
}

	]]></install>

	<hooks>
		<hook id="hd_head" priority="4"><![CDATA[

// add javascript and style files on the Index

if(FORUM_PAGE === 'index') {
// if(!$forum_user['is_guest']) { // this will remove the chat for users that aren't logged in
//	if($forum_user['g_id'] != $forum_config['o_default_user_group']) { // this removes the chat for the default group, but leaves it for every other group
		$forum_head['prototypejs'] = '<script type="text/javascript" src="'.$ext_info['url'].'/media/js/prototype.js"></script>';
		$forum_head['ek_chatlitejs'] = '<script type="text/javascript" src="'.$ext_info['url'].'/media/js/chat.js?logged='.(($forum_user['is_guest']) ? 0 :(($forum_user['is_admmod']) ? 2 : 1)).'&amp;baseUri='.$base_url.'/&amp;extUri='.$ext_info['url'].'/"></script>';

		if (file_exists($ext_info['path'].'/media/js/lang/'.$forum_user['language'].'.js')) {
			$forum_head['ek_chatlitelangjs'] = '<script type="text/javascript" src="'.$ext_info['url'].'/media/js/lang/'.$forum_user['language'].'.js"></script>';
		} else {
			$forum_head['ek_chatlitelangjs'] = '<script type="text/javascript" src="'.$ext_info['url'].'/media/js/lang/English.js"></script>';
		}

		$ek_chatlite_css = (file_exists($ext_info['path'].'/media/css/'.$forum_user['style'].'.css')) ? $forum_user['style'] : 'default';
		$forum_head['style_ek_chatlite'] = '<link rel="stylesheet" type="text/css" media="screen" href="'.$ext_info['url'].'/media/css/'.$ek_chatlite_css.'.css" />';
//	} // comment out this bracket if you remove the default group portion above
// } // comment out this bracket if you remove the guest (users not logged in) portion above
} // 
		]]></hook>
		
		<hook id="mi_new_action"><![CDATA[
		

if ($action == 'ek_chatlite') {
	// the file we work on
	$chatFile = $ext_info['path'].'/data/chat.dat';

	$do = (isset($_POST['do'])) ? $_POST['do'] : null;
	if($do === 'post') {
		date_default_timezone_set('UTC');
		$message = (isset($_POST['message'])) ? forum_trim($_POST['message']) : null;
	
		// check for guests or empty messages
		if($forum_user['is_guest'] == true) {
			header('HTTP/1.x 401 Unauthorized');
			exit();
		} else if (empty($message)) {
			header('HTTP/1.x 404 Not Found');
			exit();
		} else {
			// read chat's content
			$content = file_get_contents($chatFile);
			$content = (empty($content)) ? array() : json_decode($content);

			// prepare values
			$user = htmlspecialchars($forum_user['username']);
			$message = str_replace("\n", '<br />', htmlspecialchars($message));

			// check double message
			$last = end($content);
			if(!empty($last) && $last[1]===$user && $last[3]===$message) {
				header('HTTP/1.x 403 Forbidden');
				exit();
			}

			// add the new message
			$content[] = array(
				md5(uniqid(rand(), true)),
				$user,
				date('r'),
				$message
			);

			// remove if there's more than 50 messages
			while(count($content) >= 50) {
				array_shift($content);
			}

			// encode and write
			$content = json_encode($content);
			file_put_contents($chatFile, $content);
			// push the checksum
			$check = md5($content);
			$htaccess = file_get_contents($ext_info['path'].'/data/.htaccess');
			$htaccess = preg_replace('`X-json "\\\"\w{32}\\\""`', 'X-json "\"'.$check.'\""', $htaccess);
			file_put_contents($ext_info['path'].'/data/.htaccess', $htaccess);
		}
	} else if ($do === 'del') {
		// admins/mods only
		if($forum_user['is_admmod'] != true) {
			header('HTTP/1.x 401 Unauthorized');
			exit();
		}

		// get and validate message id
		$msgId = (isset($_POST['msgId'])) ? $_POST['msgId'] : null;
		if(preg_match('`\w{32}`A', $msgId) == 0) {
			header('HTTP/1.x 404 Not Found');
			exit();
		}

		// get content, seek for the message and delete it
		$found = false;
		$content = file_get_contents($chatFile);
		$content = (empty($content)) ? array() : json_decode($content);
		foreach($content as $i=>$msg) {
			if($msg[0] === $msgId) {
				array_splice($content, $i, 1);
				$found = true;
				break;
			}
		}

		// return new content or an error
		if($found) {
			// encode and write
			$content = json_encode($content);
			file_put_contents($chatFile, $content);
			// push the checksum
			$check = md5($content);
			$htaccess = file_get_contents($ext_info['path'].'/data/.htaccess');
			$htaccess = preg_replace('`X-json "\\\"\w{32}\\\""`', 'X-json "\"'.$check.'\""', $htaccess);
			file_put_contents($ext_info['path'].'/data/.htaccess', $htaccess);
			
		} else {
			header('HTTP/1.x 404 Not Found');
			exit();
		}
	} else {
		$content = file_get_contents($ext_info['path'].'/data/chat.dat');
		$check = md5($content);
	}

	// return chat content
	header('X-json: "'.$check.'"');
	echo $content;
	exit();
}

		]]></hook>

		<hook id="co_modify_url_scheme"><![CDATA[

// disable token validation for chat submit
if(get_current_url() === $base_url.'/misc.php?action=ek_chatlite') {
	$_POST['csrf_token'] = generate_form_token($base_url.'/misc.php?action=ek_chatlite');
}
		]]></hook>
	</hooks>
</extension>

3 updates, last one at Wed, Dec 31, 1969, 7:00pm.

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