custom event attribute search

/*
 * [events_list event_type="demo"]
 * replace attribute_name with your custom event attribute name
 */

function em_event_types_get_default_search($searches, $array)
{
	if( !empty($array['event_type'])){
		$searches['event_type'] = $array['event_type'];
	}
	return $searches;
}
add_filter('em_events_get_default_search','em_event_types_get_default_search',1,2);

add_filter('em_events_get','em_event_types_events_get',1,2);
function em_event_types_events_get($events, $args)
{
	if( !empty($args['event_type'])){
		$event_types = explode(',', $args['event_type']);
		foreach($events as $event_key => $EM_Event){
			if( !in_array($EM_Event->event_attributes['attribute_name'], $event_types) ){
				unset($events[$event_key]);
			}
		}
	}
	return $events;
}