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|
<?php
namespace ipl\Sql;
/**
* Trait for the ORDER BY part of a query
*/
trait OrderBy
{
/** @var ?array ORDER BY part of the query */
protected $orderBy;
public function hasOrderBy()
{
return $this->orderBy !== null;
}
public function getOrderBy()
{
return $this->orderBy;
}
public function orderBy($orderBy, $direction = null)
{
if (! is_array($orderBy)) {
$orderBy = [$orderBy];
}
foreach ($orderBy as $column => $dir) {
if (is_int($column)) {
$column = $dir;
$dir = $direction;
}
if (is_array($column) && count($column) === 2) {
list($column, $dir) = $column;
}
if ($dir === SORT_ASC) {
$dir = 'ASC';
} elseif ($dir === SORT_DESC) {
$dir = 'DESC';
}
$this->orderBy[] = [$column, $dir];
}
return $this;
}
public function resetOrderBy()
{
$this->orderBy = null;
return $this;
}
/**
* Clone the properties provided by this trait
*
* Shall be called by using classes in their __clone()
*/
protected function cloneOrderBy()
{
if ($this->orderBy !== null) {
foreach ($this->orderBy as &$orderBy) {
if ($orderBy[0] instanceof ExpressionInterface || $orderBy[0] instanceof Select) {
$orderBy[0] = clone $orderBy[0];
}
}
unset($orderBy);
}
}
}
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