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Edit File: QueryVarCondition.php

<?php
/**
 * @package   SureCartCore
 * @author    SureCart <support@surecart.com>
 * @copyright 2017-2019 SureCart
 * @license   https://www.gnu.org/licenses/gpl-2.0.html GPL-2.0
 * @link      https://surecart.com/
 */

namespace SureCartCore\Routing\Conditions;

use SureCartCore\Requests\RequestInterface;

/**
 * Check against a query var value.
 *
 * @codeCoverageIgnore
 */
class QueryVarCondition implements ConditionInterface {
	/**
	 * Query var name to check against.
	 *
	 * @var string|null
	 */
	protected $query_var = null;

/**
	 * Query var value to check against.
	 *
	 * @var string|null
	 */
	protected $value = '';

/**
	 * Constructor.
	 *
	 * @codeCoverageIgnore
	 * @param string      $query_var
	 * @param string|null $value
	 */
	public function __construct( $query_var, $value = null ) {
		$this->query_var = $query_var;
		$this->value     = $value;
	}

/**
	 * {@inheritDoc}
	 */
	public function isSatisfied( RequestInterface $request ) {
		$query_var_value = get_query_var( $this->query_var, null );

if ( $query_var_value === null ) {
			return false;
		}

if ( $this->value === null ) {
			return true;
		}

return (string) $this->value === $query_var_value;
	}

/**
	 * {@inheritDoc}
	 */
	public function getArguments( RequestInterface $request ) {
		return [
			'query_var' => $this->query_var,
			'value'     => $this->value,
		];
	}
}

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