Untitled

add_filter('b2bking_product_min_value', 'merco_b2bking_blank_group_qty_no_regular_fallback', 10, 3);
add_filter('b2bking_product_max_value', 'merco_b2bking_blank_group_qty_no_regular_fallback', 10, 3);
add_filter('b2bking_product_step_value', 'merco_b2bking_blank_group_qty_no_regular_fallback', 10, 3);

function merco_b2bking_blank_group_qty_no_regular_fallback($value, $product_id, $user_id) {
	if (!$user_id || get_user_meta($user_id, 'b2bking_b2buser', true) !== 'yes') {
		return $value;
	}

	$group_id = get_user_meta($user_id, 'b2bking_customergroup', true);
	if (empty($group_id)) {
		return $value;
	}

	$type = str_replace(array('b2bking_product_', '_value'), '', current_filter());
	$group_value = get_post_meta($product_id, 'b2bking_quantity_product_' . $type . '_' . $group_id, true);

	return $group_value === '' ? false : $value;
}