function activate()
{
Loader::load('module', 'file/CombineAssetsModule');
$filename = URL::getPathMap(array('file'));
$filename = $filename['file'];
$cache = CombineAssetsModule::getCombinedAsset($filename);
if ($cache && is_string($cache)) {
list($hash, $extension) = explode('.', $filename);
$mimetype = $extension == 'js' ? 'javascript' : 'css';
$lastmod = substr($hash, 32);
$lastmod = gmdate('D, d M Y H:i:s', intval($lastmod)) . ' GMT';
$etag = '"' . md5($lastmod) . '"';
$ifmod = isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? $_SERVER['HTTP_IF_MODIFIED_SINCE'] == $lastmod : null;
$iftag = isset($_SERVER['HTTP_IF_NONE_MATCH']) ? $_SERVER['HTTP_IF_NONE_MATCH'] == $etag : null;
//stop cache-control and pragma from making caching fail
header("Cache-Control:");
header("Pragma:");
// Fancy-pants conditional get
if (($ifmod || $iftag) && ($ifmod !== false && $iftag !== false)) {
header("ETag: {$etag}");
header('HTTP/1.0 304 Not Modified');
exit;
}
header("ETag: {$etag}");
header("Last-Modified: {$lastmod}");
header("Content-type: text/{$mimetype}; charset: UTF-8");
$expires = "Expires: " . gmdate("D, d M Y H:i:s", time() + 31556926) . " GMT";
header($expires);
echo $cache;
} else {
header('HTTP/1.0 404 Not Found');
echo "Could not load resource: {$filename}";
error_log('[Asset Lookup] Failed to locate ' . $filename);
}
Config::set('HideDebugger', true);
exit;
}
private static function combine_type($files, $extension, $url)
{
$combined = array();
$files_copy = $files;
foreach ($files as $index => $file) {
$filename = null;
if (!is_array($file)) {
if (self::fileHasExtension($file, $extension)) {
$filename = $file;
}
} else {
if (count($file) == 1 && isset($file['path'])) {
$filename = $file['path'];
}
}
if (isset($filename) && substr($filename, 0, 7) != 'http://') {
$clean = ltrim($file, '/');
$clean = explode('?', $clean);
$combined[] = $clean[0];
unset($files[$index], $filename);
}
}
if (!empty($combined)) {
Loader::load('module', 'file/CombineAssetsModule');
$root = Config::get('VirtualRoot');
foreach ($combined as &$file) {
$file = "{$root}/{$file}";
}
$combiner = new CombineAssetsModule($combined, $extension);
$combined_file = $combiner->activate();
if (!$combined_file) {
$files = $files_copy;
} else {
array_unshift($files, $url . $combined_file);
}
}
return $files;
}
