public function link()
{
$activeColumn = Order::column() ?: '';
$activeSort = Order::sort() ?: '';
$nextSort = 'asc';
if ($this->field === $activeColumn) {
switch ($activeSort) {
case 'asc':
$nextSort = 'desc';
break;
case 'desc':
$nextSort = Order::isBase() ? 'asc' : '';
break;
}
}
if (empty($nextSort) && !Order::isBase()) {
$queryVars = array(OrderConst::RESET_PARAM => 1);
} else {
$queryVars = array(OrderConst::COLUMN_PARAM => $this->field, OrderConst::SORT_PARAM => $nextSort);
}
return http_build_query($queryVars);
}
