MT | TEC | Add CSS classes to month view multiday events

tribe_add_ongoing_class_month_view.php

<?php

/**
 * Add CSS classes to month view multiday events
 * Three classes are added: tribe-month-multiday-event, tribe-month-multiday-start-date, tribe-month-multiday-end-date
 */
function tribe_add_ongoing_class_month_view ( $classes ) {
	global $post;
	$event_id = $post->ID;

	if( ! $event_id ) return $classes;
	if( ! tribe_is_month() ) return $classes;

	$cur_day = tribe_events_get_current_month_day();
	$event_start = tribe_get_start_date( $event_id, false, 'Y-m-d' );
	$event_end = tribe_get_end_date( $event_id, false, 'Y-m-d' );
	$event_is_multiday = tribe_event_is_multiday( $event_id );

	if ( ! $event_is_multiday ) return $classes;

	$classes[] = 'tribe-month-multiday-event';

	if( $cur_day[ 'date' ] === $event_start )
		$classes[] = 'tribe-month-multiday-start-date';

	if( $cur_day[ 'date' ] === $event_end )
		$classes[] = 'tribe-month-multiday-end-date';

	return $classes;
}
add_filter( 'tribe_events_event_classes', 'tribe_add_ongoing_class_month_view', 999 );