public function __construct($contentURLString, $cacheDir = null)
{
if (!$contentURLString) {
error_log("No URL provided");
return;
}
if ($cacheDir) {
$this->_cacheDir = $cacheDir;
}
$this->_contentURLString = $contentURLString;
$path = parse_url($contentURLString, PHP_URL_PATH);
if (!$path) {
error_log("Malformed URL");
return;
}
$comps = explode('/', $path);
if (!$comps || count($comps) < 5) {
error_log("Malformed path");
return;
}
$this->_userId = $comps[2];
$this->_siteId = $comps[3];
$this->_stackId = $comps[4];
Valid::objectId($this->_userId);
Valid::objectId($this->_siteId);
Valid::objectId($this->_stackId);
}