<?php
/**
* Download class
*
* $Id: $
*
* $LastChangedBy: $
*
* $LastChangedDate: $
*
* $Rev: $
*
* @author Indiana Jones <hide@address.com>
* @version 1.0
* @copyright 2010 PhpIndex
* @package PhpIndex
*/

class PhpIndex_Download
{
    /**
     * Mime types known
     *
     * @var array
     */
    private $_mimeTypes = array(
        'application/andrew-inset' => array('ez'),
        'application/mac-binhex40' => array('hqx'),
        'application/mac-compactpro' => array('cpt'),
        'application/mathml+xml' => array('mathml'),
        'application/msword' => array('doc'),
        'application/octet-stream' => array('bin', 'dms', 'lha',
                'lzh', 'exe', 'class', 'so', 'dll', 'dmg'),
        'application/oda' => array('oda'),
        'application/ogg' => array('ogg'),
        'application/pdf' => array('pdf'),
        'application/postscript' => array('ai', 'eps', 'ps'),
        'application/rdf+xml' => array('rdf'),
        'application/smil' => array('smi', 'smil'),
        'application/srgs' => array('gram'),
        'application/srgs+xml' => array('grxml'),
        'application/vnd.mif' => array('mif'),
        'application/vnd.mozilla.xul+xml' => array('xul'),
        'application/vnd.ms-excel' => array('xls'),
        'application/vnd.ms-powerpoint' => array('ppt'),
        'application/vnd.wap.wbxml' => array('wbxml'),
        'application/vnd.wap.wmlc' => array('wmlc'),
        'application/vnd.wap.wmlscriptc' => array('wmlsc'),
        'application/voicexml+xml' => array('vxml'),
        'application/x-bcpio' => array('bcpio'),
        'application/x-cdlink' => array('vcd'),
        'application/x-chess-pgn' => array('pgn'),
        'application/x-cpio' => array('cpio'),
        'application/x-csh' => array('csh'),
        'application/x-director' => array('dcr', 'dir', 'dxr'),
        'application/x-dvi' => array('dvi'),
        'application/x-futuresplash' => array('spl'),
        'application/x-gtar' => array('gtar'),
        'application/x-hdf' => array('hdf'),
        'application/x-javascript' => array('js'),
        'application/x-koan' => array('skp', 'skd', 'skt', 'skm'),
        'application/x-latex' => array('latex'),
        'application/x-netcdf' => array('nc', 'cdf'),
        'application/x-sh' => array('sh'),
        'application/x-shar' => array('shar'),
        'application/x-shockwave-flash' => array('swf'),
        'application/x-stuffit' => array('sit'),
        'application/x-sv4cpio' => array('sv4cpio'),
        'application/x-sv4crc' => array('sv4crc'),
        'application/x-tar' => array('tar'),
        'application/x-tcl' => array('tcl'),
        'application/x-tex' => array('tex'),
        'application/x-texinfo' => array('texinfo', 'texi'),
        'application/x-troff' => array('t', 'tr', 'roff'),
        'application/x-troff-man' => array('man'),
        'application/x-troff-me' => array('me'),
        'application/x-troff-ms' => array('ms'),
        'application/x-ustar' => array('ustar'),
        'application/x-wais-source' => array('src'),
        'application/xhtml+xml' => array('xhtml', 'xht'),
        'application/xslt+xml' => array('xslt'),
        'application/xml' => array('xml', 'xsl'),
        'application/xml-dtd' => array('dtd'),
        'application/zip' => array('zip'),
        'audio/basic' => array('au', 'snd'),
        'audio/midi' => array('mid', 'midi', 'kar'),
        'audio/mpeg' => array('mpga', 'mp2', 'mp3'),
        'audio/x-aiff' => array('aif', 'aiff', 'aifc'),
        'audio/x-mpegurl' => array('m3u'),
        'audio/x-pn-realaudio' => array('ram', 'ra'),
        'application/vnd.rn-realmedia' => array('rm'),
        'audio/x-wav' => array('wav'),
        'chemical/x-pdb' => array('pdb'),
        'chemical/x-xyz' => array('xyz'),
        'image/bmp' => array('bmp'),
        'image/cgm' => array('cgm'),
        'image/gif' => array('gif'),
        'image/ief' => array('ief'),
        'image/jpeg' => array('jpeg', 'jpg', 'jpe'),
        'image/png' => array('png'),
        'image/svg+xml' => array('svg'),
        'image/tiff' => array('tiff', 'tif'),
        'image/vnd.djvu' => array('djvu', 'djv'),
        'image/vnd.wap.wbmp' => array('wbmp'),
        'image/x-cmu-raster' => array('ras'),
        'image/x-icon' => array('ico'),
        'image/x-portable-anymap' => array('pnm'),
        'image/x-portable-bitmap' => array('pbm'),
        'image/x-portable-graymap' => array('pgm'),
        'image/x-portable-pixmap' => array('ppm'),
        'image/x-rgb' => array('rgb'),
        'image/x-xbitmap' => array('xbm'),
        'image/x-xpixmap' => array('xpm'),
        'image/x-xwindowdump' => array('xwd'),
        'model/iges' => array('igs', 'iges'),
        'model/mesh' => array('msh', 'mesh', 'silo'),
        'model/vrml' => array('wrl', 'vrml'),
        'text/calendar' => array('ics', 'ifb'),
        'text/css' => array('css'),
        'text/html' => array('html', 'htm'),
        'text/plain' => array('asc', 'txt'),
        'text/richtext' => array('rtx'),
        'text/rtf' => array('rtf'),
        'text/sgml' => array('sgml', 'sgm'),
        'text/tab-separated-values' => array('tsv'),
        'text/vnd.wap.wml' => array('wml'),
        'text/vnd.wap.wmlscript' => array('wmls'),
        'text/x-setext' => array('etx'),
        'video/mpeg' => array('mpeg', 'mpg', 'mpe'),
        'video/quicktime' => array('qt', 'mov'),
        'video/vnd.mpegurl' => array('mxu', 'm4u'),
        'video/x-msvideo' => array('avi'),
        'video/x-sgi-movie' => array('movie'),
        'x-conference/x-cooltalk' => array('ice')
    );

    /**
     * Download a given file
     *
     * @param string $file
     * @return void
     */
    public function download($file)
    {
        if (!file_exists($file)) {
            header('HTTP/1.0 404 Not Found');
            die ('Requested file does not exist.');
        }

        $handle = fopen($file, 'r');

        if (!$handle) {
            header('HTTP/1.0 404 Not Found');
            die ('Failed to open requested file.');
        }

        $fileSize = filesize($file);
        $pathParts = pathinfo($file);

        $mimeType = $this->_detectMimeType($pathParts['extension']);

        header('Content-Type: ' . $mimeType . '; name="' . $pathParts['basename'] . '"');
        header('Content-Disposition: attachment; filename="' . $pathParts['basename'] . '"');
        header('Content-Length: ' . $fileSize);
        header('Cache-control: private');

        while(!feof($handle)) {
            $buffer = fread($handle, 2048);
            echo $buffer;
        }

        fclose ($handle);
    }

    /**
     * Detect mime type from file extension
     *
     * @param string $extension
     * @return string
     */
    private function _detectMimeType($extension)
    {
	foreach ($this->_mimeTypes as $mimeType => $mimeExtensions) {
            if (in_array($extension, $mimeExtensions)) {
                return $mimeType;
            }
	}

	return 'application/force-download';
    }
}

/* EOF */