Give double weight to current and future events in relevanssi search (Relevanssi & Events Manager)

functions.php

add_filter('relevanssi_match', 'date_weights');

function date_weights($match) {
	$EM_Event = em_get_event($match->doc, 'post_id');
	$enddate = $EM_Event->event_end_date;
	$yesterday = time() - 24*60*60;;
	if (strtotime($enddate) > $yesterday) {
 		$match->weight = $match->weight * 2;
	}
	else {
		$match->weight = $match->weight / 2;
	}
	return $match;
}