php-phpbb/phpBB/style.php

<?php
/**
*
* @package phpBB3
* @version $Id$
* @copyright (c) 2005 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/

/**
* @ignore
*/
define('IN_PHPBB', true);
if (!defined('PHPBB_ROOT_PATH')) define('PHPBB_ROOT_PATH', './');
if (!defined('PHP_EXT')) define('PHP_EXT', substr(strrchr(__FILE__, '.'), 1));

$sid = (isset($_GET['sid']) && !is_array($_GET['sid'])) ? htmlspecialchars($_GET['sid']) : '';
$id = (isset($_GET['id'])) ? intval($_GET['id']) : 0;

if (strspn($sid, 'abcdefABCDEF0123456789') !== strlen($sid))
{
	$sid = '';
}

// This is a simple script to grab and output the requested CSS data stored in the DB
// We include a session_id check to try and limit 3rd party linking ... unless they
// happen to have a current session it will output nothing. We will also cache the
// resulting CSS data for five minutes ... anything to reduce the load on the SQL
// server a little
if (!$id)
{
	exit;
}

include(PHPBB_ROOT_PATH . 'common.' . PHP_EXT);

$user = false;

if ($sid)
{
	$sql = 'SELECT u.user_id, u.user_lang
		FROM ' . SESSIONS_TABLE . ' s, ' . USERS_TABLE . " u
		WHERE s.session_id = '" . $db->sql_escape($sid) . "'
			AND s.session_user_id = u.user_id";
	$result = $db->sql_query($sql);
	$user = $db->sql_fetchrow($result);
	$db->sql_freeresult($result);
}

$recompile = $config['load_tplcompile'];
if (!$user)
{
	$id			= $config['default_style'];
	$recompile	= false;
	$user		= array('user_id' => ANONYMOUS);
}

$sql = 'SELECT s.style_id, c.theme_id, c.theme_data, c.theme_path, c.theme_name, c.theme_mtime, i.*, t.template_path
	FROM ' . STYLES_TABLE . ' s, ' . STYLES_TEMPLATE_TABLE . ' t, ' . STYLES_THEME_TABLE . ' c, ' . STYLES_IMAGESET_TABLE . ' i
	WHERE s.style_id = ' . $id . '
		AND t.template_id = s.template_id
		AND c.theme_id = s.theme_id
		AND i.imageset_id = s.imageset_id';
$result = $db->sql_query($sql, 300);
$theme = $db->sql_fetchrow($result);
$db->sql_freeresult($result);

if (!$theme)
{
	garbage_collection();
	exit_handler();
}

if ($user['user_id'] == ANONYMOUS)
{
	$user['user_lang'] = $config['default_lang'];
}

$user_image_lang = (file_exists(PHPBB_ROOT_PATH . 'styles/' . $theme['imageset_path'] . '/imageset/' . $user['user_lang'])) ? $user['user_lang'] : $config['default_lang'];

$sql = 'SELECT *
	FROM ' . STYLES_IMAGESET_DATA_TABLE . '
	WHERE imageset_id = ' . $theme['imageset_id'] . "
	AND image_filename <> '' 
	AND image_lang IN ('" . $db->sql_escape($user_image_lang) . "', '')";
$result = $db->sql_query($sql, 3600);

$img_array = array();
while ($row = $db->sql_fetchrow($result))
{
	$img_array[$row['image_name']] = $row;
}
$db->sql_freeresult($result);

// gzip_compression
if ($config['gzip_compress'])
{
	// IE6 is not able to compress the style (do not ask us why!)
	$browser = (!empty($_SERVER['HTTP_USER_AGENT'])) ? strtolower(htmlspecialchars((string) $_SERVER['HTTP_USER_AGENT'])) : '';

	if ($browser && strpos($browser, 'msie 6.0') === false && @extension_loaded('zlib') && !headers_sent())
	{
		ob_start('ob_gzhandler');
	}
}

// Expire time of seven days if not recached
$expire_time = 7 * 86400;
$recache = false;

// Re-cache stylesheet data if necessary
if ($recompile || empty($theme['theme_data']))
{
	$recache = (empty($theme['theme_data'])) ? true : false;
	$update_time = time();

	// We test for stylesheet.css because it is faster and most likely the only file changed on common themes
	if (!$recache && $theme['theme_mtime'] < @filemtime(PHPBB_ROOT_PATH . 'styles/' . $theme['theme_path'] . '/theme/stylesheet.css'))
	{
		$recache = true;
		$update_time = @filemtime(PHPBB_ROOT_PATH . 'styles/' . $theme['theme_path'] . '/theme/stylesheet.css');
	}
	else if (!$recache)
	{
		$last_change = $theme['theme_mtime'];
		$dir = @opendir(PHPBB_ROOT_PATH . "styles/{$theme['theme_path']}/theme");

		if ($dir)
		{
			while (($entry = readdir($dir)) !== false)
			{
				if (substr(strrchr($entry, '.'), 1) == 'css' && $last_change < @filemtime(PHPBB_ROOT_PATH . "styles/{$theme['theme_path']}/theme/{$entry}"))
				{
					$recache = true;
					break;
				}
			}
			closedir($dir);
		}
	}
}

if ($recache)
{
	if (!class_exists('acp_styles'))
	{
		include(PHPBB_ROOT_PATH . 'includes/acp/acp_styles.' . PHP_EXT);
	}

	$theme['theme_data'] = acp_styles::db_theme_data($theme);
	$theme['theme_mtime'] = $update_time;

	// Save CSS contents
	$sql_ary = array(
		'theme_mtime'	=> $theme['theme_mtime'],
		'theme_data'	=> $theme['theme_data']
	);

	// @TODO: rewrite with the new param db functions
	$sql = 'UPDATE ' . STYLES_THEME_TABLE . ' SET ' . $db->sql_build_array('UPDATE', $sql_ary) . "
		WHERE theme_id = {$theme['theme_id']}";
	$db->sql_query($sql);

	$cache->destroy('sql', STYLES_THEME_TABLE);
}

// Only set the expire time if the theme changed data is older than 30 minutes - to cope with changes from the ACP
if ($recache || $theme['theme_mtime'] > (time() - 1800))
{
	header('Expires: 0');
}
else
{
	header('Expires: ' . gmdate('D, d M Y H:i:s \G\M\T', time() + $expire_time));
}

header('Content-type: text/css; charset=UTF-8');

// Parse Theme Data
$replace = array(
	'{T_THEME_PATH}'			=> PHPBB_ROOT_PATH . 'styles/' . $theme['theme_path'] . '/theme',
	'{T_TEMPLATE_PATH}'			=> PHPBB_ROOT_PATH . 'styles/' . $theme['template_path'] . '/template',
	'{T_IMAGESET_PATH}'			=> PHPBB_ROOT_PATH . 'styles/' . $theme['imageset_path'] . '/imageset',
	'{T_IMAGESET_LANG_PATH}'	=> PHPBB_ROOT_PATH . 'styles/' . $theme['imageset_path'] . '/imageset/' . $user_image_lang,
	'{T_STYLESHEET_NAME}'		=> $theme['theme_name'],
	'{S_USER_LANG}'				=> $user['user_lang']
);

$theme['theme_data'] = str_replace(array_keys($replace), array_values($replace), $theme['theme_data']);

$matches = array();
preg_match_all('#\{IMG_([A-Za-z0-9_]*?)_(WIDTH|HEIGHT|SRC)\}#', $theme['theme_data'], $matches);

$imgs = $find = $replace = array();
if (isset($matches[0]) && sizeof($matches[0]))
{
	foreach ($matches[1] as $i => $img)
	{
		$img = strtolower($img);
		$find[] = $matches[0][$i];

		if (!isset($img_array[$img]))
		{
			$replace[] = '';
			continue;
		}

		if (!isset($imgs[$img]))
		{
			$img_data = &$img_array[$img];
			$imgsrc = ($img_data['image_lang'] ? $img_data['image_lang'] . '/' : '') . $img_data['image_filename'];
			$imgs[$img] = array(
				'src'		=> PHPBB_ROOT_PATH . 'styles/' . $theme['imageset_path'] . '/imageset/' . $imgsrc,
				'width'		=> $img_data['image_width'],
				'height'	=> $img_data['image_height'],
			);
		}

		switch ($matches[2][$i])
		{
			case 'SRC':
				$replace[] = $imgs[$img]['src'];
			break;
			
			case 'WIDTH':
				$replace[] = $imgs[$img]['width'];
			break;

			case 'HEIGHT':
				$replace[] = $imgs[$img]['height'];
			break;

			default:
				continue;
		}
	}

	if (sizeof($find))
	{
		$theme['theme_data'] = str_replace($find, $replace, $theme['theme_data']);
	}
}

echo $theme['theme_data'];

garbage_collection();
exit_handler();

?>