<?php
/*
* 2007-2015 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/osl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2015 PrestaShop SA
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

class GetFileControllerCore extends FrontController
{
	protected $display_header = false;
	protected $display_footer = false;

	public function init()
	{
		if (isset($this->context->employee) && $this->context->employee->isLoggedBack() && Tools::getValue('file'))
		{
			// Admin can directly access to file
			$filename = Tools::getValue('file');
			if (!Validate::isSha1($filename))
				die(Tools::displayError());
			$file = _PS_DOWNLOAD_DIR_.strval(preg_replace('/\.{2,}/', '.', $filename));
			$filename = ProductDownload::getFilenameFromFilename(Tools::getValue('file'));
			if (empty($filename))
			{
				$newFileName = Tools::getValue('filename');
				if (!empty($newFileName))
					$filename = Tools::getValue('filename');
				else
					$filename = 'file';
			}

			if (!file_exists($file))
				Tools::redirect('index.php');
		}
		else
		{
			if (!($key = Tools::getValue('key')))
				$this->displayCustomError('Invalid key.');

			Tools::setCookieLanguage();
			if (!$this->context->customer->isLogged() && !Tools::getValue('secure_key') && !Tools::getValue('id_order'))
				Tools::redirect('index.php?controller=authentication&back=get-file.php&key='.$key);
			elseif (!$this->context->customer->isLogged() && Tools::getValue('secure_key') && Tools::getValue('id_order'))
			{
				$order = new Order((int)Tools::getValue('id_order'));
				if (!Validate::isLoadedObject($order))
					$this->displayCustomError('Invalid key.');
				if ($order->secure_key != Tools::getValue('secure_key'))
					$this->displayCustomError('Invalid key.');
			}

			/* Key format: <sha1-filename>-<hashOrder> */
			$tmp = explode('-', $key);
			if (count($tmp) != 2)
				$this->displayCustomError('Invalid key.');

			$filename = $tmp[0];
			$hash = $tmp[1];

			if (!($info = OrderDetail::getDownloadFromHash($hash)))
				$this->displayCustomError('This product does not exist in our store.');

			/* Product no more present in catalog */
			if (!isset($info['id_product_download']) || empty($info['id_product_download']))
				$this->displayCustomError('This product has been deleted.');

			if (!Validate::isFileName($info['filename']) || !file_exists(_PS_DOWNLOAD_DIR_.$info['filename']))
				$this->displayCustomError('This file no longer exists.');

            if (isset($info['product_quantity_refunded']) && isset($info['product_quantity_return']) &&
                ($info['product_quantity_refunded'] > 0 || $info['product_quantity_return'] > 0))
                $this->displayCustomError('This product has been refunded.');

			$now = time();

			$product_deadline = strtotime($info['download_deadline']);
			if ($now > $product_deadline && $info['download_deadline'] != '0000-00-00 00:00:00')
				$this->displayCustomError('The product deadline is in the past.');

			$customer_deadline = strtotime($info['date_expiration']);
			if ($now > $customer_deadline && $info['date_expiration'] != '0000-00-00 00:00:00')
				$this->displayCustomError('Expiration date has passed, you cannot download this product');

			if ($info['download_nb'] >= $info['nb_downloadable'] && $info['nb_downloadable'])
				$this->displayCustomError('You have reached the maximum number of allowed downloads.');

			/* Access is authorized -> increment download value for the customer */
			OrderDetail::incrementDownload($info['id_order_detail']);

			$file = _PS_DOWNLOAD_DIR_.$info['filename'];
			$filename = $info['display_filename'];
		}

		/* Detect mime content type */
		$mimeType = false;
		if (function_exists('finfo_open'))
		{
			$finfo = @finfo_open(FILEINFO_MIME);
			$mimeType = @finfo_file($finfo, $file);
			@finfo_close($finfo);
		}
		elseif (function_exists('mime_content_type'))
			$mimeType = @mime_content_type($file);
		elseif (function_exists('exec'))
		{
			$mimeType = trim(@exec('file -b --mime-type '.escapeshellarg($file)));
			if (!$mimeType)
				$mimeType = trim(@exec('file --mime '.escapeshellarg($file)));
			if (!$mimeType)
				$mimeType = trim(@exec('file -bi '.escapeshellarg($file)));
		}

		if (empty($mimeType))
		{
			$bName = basename($filename);
			$bName = explode('.', $bName);
			$bName = strtolower($bName[count($bName) - 1]);

			$mimeTypes = array(
			'ez' => 'application/andrew-inset',
			'hqx' => 'application/mac-binhex40',
			'cpt' => 'application/mac-compactpro',
			'doc' => 'application/msword',
			'oda' => 'application/oda',
			'pdf' => 'application/pdf',
			'ai' => 'application/postscript',
			'eps' => 'application/postscript',
			'ps' => 'application/postscript',
			'smi' => 'application/smil',
			'smil' => 'application/smil',
			'wbxml' => 'application/vnd.wap.wbxml',
			'wmlc' => 'application/vnd.wap.wmlc',
			'wmlsc' => 'application/vnd.wap.wmlscriptc',
			'bcpio' => 'application/x-bcpio',
			'vcd' => 'application/x-cdlink',
			'pgn' => 'application/x-chess-pgn',
			'cpio' => 'application/x-cpio',
			'csh' => 'application/x-csh',
			'dcr' => 'application/x-director',
			'dir' => 'application/x-director',
			'dxr' => 'application/x-director',
			'dvi' => 'application/x-dvi',
			'spl' => 'application/x-futuresplash',
			'gtar' => 'application/x-gtar',
			'hdf' => 'application/x-hdf',
			'js' => 'application/x-javascript',
			'skp' => 'application/x-koan',
			'skd' => 'application/x-koan',
			'skt' => 'application/x-koan',
			'skm' => 'application/x-koan',
			'latex' => 'application/x-latex',
			'nc' => 'application/x-netcdf',
			'cdf' => 'application/x-netcdf',
			'sh' => 'application/x-sh',
			'shar' => 'application/x-shar',
			'swf' => 'application/x-shockwave-flash',
			'sit' => 'application/x-stuffit',
			'sv4cpio' => 'application/x-sv4cpio',
			'sv4crc' => 'application/x-sv4crc',
			'tar' => 'application/x-tar',
			'tcl' => 'application/x-tcl',
			'tex' => 'application/x-tex',
			'texinfo' => 'application/x-texinfo',
			'texi' => 'application/x-texinfo',
			't' => 'application/x-troff',
			'tr' => 'application/x-troff',
			'roff' => 'application/x-troff',
			'man' => 'application/x-troff-man',
			'me' => 'application/x-troff-me',
			'ms' => 'application/x-troff-ms',
			'ustar' => 'application/x-ustar',
			'src' => 'application/x-wais-source',
			'xhtml' => 'application/xhtml+xml',
			'xht' => 'application/xhtml+xml',
			'zip' => 'application/zip',
			'au' => 'audio/basic',
			'snd' => 'audio/basic',
			'mid' => 'audio/midi',
			'midi' => 'audio/midi',
			'kar' => 'audio/midi',
			'mpga' => 'audio/mpeg',
			'mp2' => 'audio/mpeg',
			'mp3' => 'audio/mpeg',
			'aif' => 'audio/x-aiff',
			'aiff' => 'audio/x-aiff',
			'aifc' => 'audio/x-aiff',
			'm3u' => 'audio/x-mpegurl',
			'ram' => 'audio/x-pn-realaudio',
			'rm' => 'audio/x-pn-realaudio',
			'rpm' => 'audio/x-pn-realaudio-plugin',
			'ra' => 'audio/x-realaudio',
			'wav' => 'audio/x-wav',
			'pdb' => 'chemical/x-pdb',
			'xyz' => 'chemical/x-xyz',
			'bmp' => 'image/bmp',
			'gif' => 'image/gif',
			'ief' => 'image/ief',
			'jpeg' => 'image/jpeg',
			'jpg' => 'image/jpeg',
			'jpe' => 'image/jpeg',
			'png' => 'image/png',
			'tiff' => 'image/tiff',
			'tif' => 'image/tif',
			'djvu' => 'image/vnd.djvu',
			'djv' => 'image/vnd.djvu',
			'wbmp' => 'image/vnd.wap.wbmp',
			'ras' => 'image/x-cmu-raster',
			'pnm' => 'image/x-portable-anymap',
			'pbm' => 'image/x-portable-bitmap',
			'pgm' => 'image/x-portable-graymap',
			'ppm' => 'image/x-portable-pixmap',
			'rgb' => 'image/x-rgb',
			'xbm' => 'image/x-xbitmap',
			'xpm' => 'image/x-xpixmap',
			'xwd' => 'image/x-windowdump',
			'igs' => 'model/iges',
			'iges' => 'model/iges',
			'msh' => 'model/mesh',
			'mesh' => 'model/mesh',
			'silo' => 'model/mesh',
			'wrl' => 'model/vrml',
			'vrml' => 'model/vrml',
			'css' => 'text/css',
			'html' => 'text/html',
			'htm' => 'text/html',
			'asc' => 'text/plain',
			'txt' => 'text/plain',
			'rtx' => 'text/richtext',
			'rtf' => 'text/rtf',
			'sgml' => 'text/sgml',
			'sgm' => 'text/sgml',
			'tsv' => 'text/tab-seperated-values',
			'wml' => 'text/vnd.wap.wml',
			'wmls' => 'text/vnd.wap.wmlscript',
			'etx' => 'text/x-setext',
			'xml' => 'text/xml',
			'xsl' => 'text/xml',
			'mpeg' => 'video/mpeg',
			'mpg' => 'video/mpeg',
			'mpe' => 'video/mpeg',
			'qt' => 'video/quicktime',
			'mov' => 'video/quicktime',
			'mxu' => 'video/vnd.mpegurl',
			'avi' => 'video/x-msvideo',
			'movie' => 'video/x-sgi-movie',
			'ice' => 'x-conference-xcooltalk');

			if (isset($mimeTypes[$bName]))
				$mimeType = $mimeTypes[$bName];
			else
				$mimeType = 'application/octet-stream';
		}

		if (ob_get_level() && ob_get_length() > 0)
			ob_end_clean();

		/* Set headers for download */
		header('Content-Transfer-Encoding: binary');
		header('Content-Type: '.$mimeType);
		header('Content-Length: '.filesize($file));
		header('Content-Disposition: attachment; filename="'.$filename.'"');
		//prevents max execution timeout, when reading large files
		@set_time_limit(0);
		$fp = fopen($file, 'rb');
		while (!feof($fp))
			echo fgets($fp, 16384);

		exit;
	}

	/**
	 * Display an error message with js
	 * and redirect using js function
	 */
	protected function displayCustomError($msg)
	{
		$translations = array(
		'Invalid key.' => Tools::displayError('Invalid key.'),
		'This product does not exist in our store.' => Tools::displayError('This product does not exist in our store.'),
		'This product has been deleted.' => Tools::displayError('This product has been deleted.'),
		'This file no longer exists.'	=> Tools::displayError('This file no longer exists.'),
		'This product has been refunded.' => Tools::displayError('This product has been refunded.'),
		'The product deadline is in the past.' => Tools::displayError('The product deadline is in the past.'),
		'Expiration date exceeded' => Tools::displayError('The product expiration date has passed, preventing you from download this product.'),
		'Expiration date has passed, you cannot download this product' => Tools::displayError('Expiration date has passed, you cannot download this product.'),
		'You have reached the maximum number of allowed downloads.' => Tools::displayError('You have reached the maximum number of downloads allowed.'));
		?>
		<script type="text/javascript">
		//<![CDATA[
		alert("<?php echo isset($translations[$msg]) ? html_entity_decode($translations[$msg], ENT_QUOTES, 'utf-8') : html_entity_decode($msg, ENT_QUOTES, 'utf-8'); ?>");
		window.location.href = '<?php echo __PS_BASE_URI__ ?>';
		//]]>
		</script>
		<?php
		exit();
	}
}
