Custom ACF location rule for The Events Calendar Event category

acf-rules.php

<?php

//* Add custom location rule type to column one for selecting an Event category
add_filter( 'acf/location/rule_types', 'mc_location_rule_types' );

function mc_location_rule_types( $choices ) {

	$choices['Events']['event_type'] = 'Event Type';

	return $choices;

}

//* Add custom location rule value to column three - loops through each Event category and adds its name as a choice
add_filter( 'acf/location/rule_values/event_type', 'mc_location_rule_values_event_cat' );

function mc_location_rule_values_event_cat( $choices ) {

	$cats = get_terms( 'tribe_events_cat', array( 'hide_empty' => 0 ) );

	if ( ! is_wp_error( $cats ) ) {

		foreach ( $cats as $cat ) {

			//* Set term ID as key for comparison when matching
			$choices[ $cat->term_id ] = $cat->name;
		}

	}

	return $choices;

}

//* Add custom match element for the custom location rule value
add_filter( 'acf/location/rule_match/event_type', 'mc_location_rule_match_event_cat', 10, 3 );

function mc_location_rule_match_event_cat( $match, $rule, $options ) {

	//* Only check Events
	if ( function_exists( 'tribe_is_event' ) && tribe_is_event( get_the_ID() ) ) {

		//* Get all Event categories for current post
		$event_cats   = wp_get_post_terms( get_the_ID(), 'tribe_events_cat', array( 'fields' => 'ids' ) );
		$selected_cat = (int) $rule['value'];

		if ( $rule['operator'] == "==" ) {

			$match = ( in_array( $selected_cat, $event_cats ) );

		} elseif ( $rule['operator'] == "!=" ) {

			$match = ( ! in_array( $selected_cat, $event_cats ) );

		}

	}

	return $match;
}