/**
* Creates a TimeIt_Filter_Container form GET and POST values.
*
* @param string $string Filter expression to parse.
* @param TimeIt_Filter_Container $filter Filter object to use.
* @param string $objectType Obect type to pass to the constructon if $filter was null.
*
* @return TimeIt_Filter_Container created TimeIt_Filter_Container
*/
public static function getFilterFormString($string, TimeIt_Filter_Container $filter = null, $objectType = 'event')
{
if ($filter) {
$ret = $filter;
} else {
$ret = new TimeIt_Filter_Container($objectType);
}
if (!$ret->hasGroup()) {
$ret->addGroup();
}
if (!empty($string)) {
$first = true;
$filters = explode('&', $string);
foreach ($filters as $filter) {
if (!$first) {
$ret->addGroup();
}
$expressions = explode(',', $filter);
foreach ($expressions as $ex) {
$ret->addExp($ex);
}
}
}
return $ret;
}
