<?php

namespace Common\Files\Response;

use Common\Files\FileEntry;

class RangeFileResponse implements FileResponse
{
    /**
     * @param FileEntry $entry
     * @param array $options
     * @return mixed
     */
    public function make(FileEntry $entry, $options)
    {
        $disk   = $entry->getDisk();
        $size	= $disk->size($entry->getStoragePath());
        $time	= date('r', $entry->updated_at->timestamp);
        $fm		= $disk->getDriver()->readStream($entry->getStoragePath());
        $begin	= 0;
        $end	= $size - 1;

        if (isset($_SERVER['HTTP_RANGE']))
        {
            if (preg_match('/bytes=\h*(\d+)-(\d*)[\D.*]?/i', $_SERVER['HTTP_RANGE'], $matches))
            {
                $begin	= intval($matches[1]);
                if (!empty($matches[2]))
                {
                    $end = intval($matches[2]);
                }
            }
        }

        if (isset($_SERVER['HTTP_RANGE']))
        {
            header('HTTP/1.1 206 Partial Content');
        }
        else
        {
            header('HTTP/1.1 200 OK');
        }

        header("Content-Type: $entry->mime");
        header('Cache-Control: public, must-revalidate, max-age=0');
        header('Pragma: no-cache');
        header('Accept-Ranges: bytes');
        header('Content-Length:' . (($end - $begin) + 1));
        if (isset($_SERVER['HTTP_RANGE']))
        {
            header("Content-Range: bytes $begin-$end/$size");
        }
        header("Content-Disposition: inline; filename={$entry->getNameWithExtension()}");
        header("Content-Transfer-Encoding: binary");
        header("Last-Modified: $time");

        $cur	= $begin;
        fseek($fm, $begin, 0);

        while(!feof($fm) && $cur <= $end && (connection_status() == 0))
        {
            print fread($fm, min(1024 * 16, ($end - $cur) + 1));
            $cur += 1024 * 16;
        }
    }
}
