configure different preparation time by day of the week

gistfile1.txt

if(!function_exists('custom_preparation_days_for_sat_sun')) {
	add_filter('pisol_dtt_setting_filter_pi_order_preparation_days', 'custom_preparation_days_for_sat_sun', PHP_INT_MAX);
	add_filter('pisol_dtt_setting_filter_pi_order_preparation_days_pickup', 'custom_preparation_days_for_sat_sun', PHP_INT_MAX);
	add_filter('pisol_dtt_setting_filter_pi_order_preparation_days_delivery', 'custom_preparation_days_for_sat_sun', PHP_INT_MAX);

	function custom_preparation_days_for_sat_sun($preparation_days) {
		$day = (int) wp_date('w');  // 0 => sunday, 1 => monday

		if($day == 0) return 2;

		if($day == 6) return 3;

		return $preparation_days;
	}
}