<?php
/**
 * Copyright © 2016 Magento. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Downloadable\Controller;

use Magento\Downloadable\Helper\Download as DownloadHelper;

/**
 * Download controller
 *
 * @author      Magento Core Team <core@magentocommerce.com>
 */
abstract class Download extends \Magento\Framework\App\Action\Action
{
    /**
     * Prepare response to output resource contents
     *
     * @param string $path         Path to resource
     * @param string $resourceType Type of resource (see Magento\Downloadable\Helper\Download::LINK_TYPE_* constants)
     * @return void
     */
    protected function _processDownload($path, $resourceType)
    {
        /* @var $helper DownloadHelper */
        $helper = $this->_objectManager->get('Magento\Downloadable\Helper\Download');

        $helper->setResource($path, $resourceType);
        $fileName = $helper->getFilename();
        $contentType = $helper->getContentType();

        $this->getResponse()->setHttpResponseCode(
            200
        )->setHeader(
            'Pragma',
            'public',
            true
        )->setHeader(
            'Cache-Control',
            'must-revalidate, post-check=0, pre-check=0',
            true
        )->setHeader(
            'Content-type',
            $contentType,
            true
        );

        if ($fileSize = $helper->getFileSize()) {
            $this->getResponse()->setHeader('Content-Length', $fileSize);
        }

        if ($contentDisposition = $helper->getContentDisposition()) {
            $this->getResponse()->setHeader('Content-Disposition', $contentDisposition . '; filename=' . $fileName);
        }

        $this->getResponse()->clearBody();
        $this->getResponse()->sendHeaders();

        $helper->output();
    }

    /**
     * Get link model
     *
     * @return \Magento\Downloadable\Model\Link
     */
    protected function _getLink()
    {
        return $this->_objectManager->get('Magento\Downloadable\Model\Link');
    }
}