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<?php
/**
 * @link https://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license https://www.yiiframework.com/license/
 */

namespace yii\rest;

use Yii;

/**
 * OptionsAction responds to the OPTIONS request by sending back an `Allow` header.
 *
 * For more details and usage information on OptionsAction, see the [guide article on rest controllers](guide:rest-controllers).
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class OptionsAction extends \yii\base\Action
{
    /**
     * @var array the HTTP verbs that are supported by the collection URL
     */
    public $collectionOptions = ['GET', 'POST', 'HEAD', 'OPTIONS'];
    /**
     * @var array the HTTP verbs that are supported by the resource URL
     */
    public $resourceOptions = ['GET', 'PUT', 'PATCH', 'DELETE', 'HEAD', 'OPTIONS'];

/**
     * Responds to the OPTIONS request.
     * @param string|null $id
     */
    public function run($id = null)
    {
        if (Yii::$app->getRequest()->getMethod() !== 'OPTIONS') {
            Yii::$app->getResponse()->setStatusCode(405);
        }
        $options = $id === null ? $this->collectionOptions : $this->resourceOptions;
        $headers = Yii::$app->getResponse()->getHeaders();
        $headers->set('Allow', implode(', ', $options));
        $headers->set('Access-Control-Allow-Methods', implode(', ', $options));
    }
}