/**
* Retrieve an asset from the cache for display
* @param $id string identifying the item to return
* @return null|string
*/
private static function retrieve_cache_asset($cache_id, $asset_id)
{
$storage = Amber::get_storage_for_item($cache_id);
if (is_null($storage)) {
return NULL;
}
$d = $storage->get_asset($cache_id, $asset_id);
if ($d) {
$data['data'] = $d;
// Set the mime-type for certain files
$last_element = $asset_id;
$extension = substr($last_element, strrpos($last_element, '.') + 1);
switch ($extension) {
case "css":
$data['metadata']['type'] = 'text/css';
break;
case "jpg":
$data['metadata']['type'] = 'image/jpeg';
break;
case "png":
$data['metadata']['type'] = 'image/png';
break;
case "svg":
$data['metadata']['type'] = 'image/svg+xml';
break;
case "js":
$data['metadata']['type'] = 'application/javascript';
break;
}
}
return isset($data) ? $data : NULL;
}
