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✏️ Editing: OrderClauseExpression.php

<?php

declare (strict_types=1);
/**
 * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 * @link          https://cakephp.org CakePHP(tm) Project
 * @since         3.0.0
 * @license       https://opensource.org/licenses/mit-license.php MIT License
 */
namespace WPToolkitDependenciesIsolationPrefix\Cake\Database\Expression;

use WPToolkitDependenciesIsolationPrefix\Cake\Database\ExpressionInterface;
use WPToolkitDependenciesIsolationPrefix\Cake\Database\Query;
use WPToolkitDependenciesIsolationPrefix\Cake\Database\ValueBinder;
use Closure;
/**
 * An expression object for complex ORDER BY clauses
 */
class OrderClauseExpression implements ExpressionInterface, FieldInterface
{
    use FieldTrait;
    /**
     * The direction of sorting.
     *
     * @var string
     */
    protected $_direction;
    /**
     * Constructor
     *
     * @param \Cake\Database\ExpressionInterface|string $field The field to order on.
     * @param string $direction The direction to sort on.
     */
    public function __construct($field, $direction)
    {
        $this->_field = $field;
        $this->_direction = \strtolower($direction) === 'asc' ? 'ASC' : 'DESC';
    }
    /**
     * @inheritDoc
     */
    public function sql(ValueBinder $binder) : string
    {
        /** @var \Cake\Database\ExpressionInterface|string $field */
        $field = $this->_field;
        if ($field instanceof Query) {
            $field = \sprintf('(%s)', $field->sql($binder));
        } elseif ($field instanceof ExpressionInterface) {
            $field = $field->sql($binder);
        }
        return \sprintf('%s %s', $field, $this->_direction);
    }
    /**
     * @inheritDoc
     */
    public function traverse(Closure $callback)
    {
        if ($this->_field instanceof ExpressionInterface) {
            $callback($this->_field);
            $this->_field->traverse($callback);
        }
        return $this;
    }
    /**
     * Create a deep clone of the order clause.
     *
     * @return void
     */
    public function __clone()
    {
        if ($this->_field instanceof ExpressionInterface) {
            $this->_field = clone $this->_field;
        }
    }
}

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