<?php
/*
@author suxoza <suxoza@gmail.com>
*/
    class Stream{


        public $itags = [
            '5' => ['320x240', 'flv', "normal"],
            '17'=> ['176x144', '3gp', "normal"],
            '18'=> ['640x360', 'mp4', "normal"],
            '22'=> ['1280x720', 'mp4', "normal"],
            '34'=> ['640x360', 'flv', "normal"],
            '35'=> ['854x480', 'flv', "normal"],
            '36'=> ['320x240', '3gp', "normal"],
            '37'=> ['1920x1080', 'mp4', "normal"],
            '38'=> ['4096x3072', 'superHD', "normal"],
            '43'=> ['640x360', 'webm', "normal"],
            '44'=> ['854x480', 'webm', "normal"],
            '45'=> ['1280x720', 'webm', "normal"],
            '46'=> ['1920x1080', 'webm', "normal"],
            '82'=> ['640x360-3D', 'mp4', "normal"],
            '84'=> ['1280x720-3D', 'mp4', "normal"],
            '100'=> ['640x360-3D', 'webm', "normal"],
            '102'=> ['1280x720-3D', 'webm', "normal"],
            '133'=> ['426x240', 'm4v', 'video'],
            '134'=> ['640x360', 'm4v', 'video'],
            '135'=> ['854x480', 'm4v', 'video'],
            '136'=> ['1280x720', 'm4v', 'video'],
            '137'=> ['1920x1080', 'm4v', 'video'],
            '138'=> ['4096x3072', 'm4v', 'video'],
            '139'=> ['48k', 'm4a', 'audio'],
            '140'=> ['128k', 'm4a', 'audio'],
            '141'=> ['256k', 'm4a', 'audio'],
            '160'=> ['256x144', 'm4v', 'video'],
            '171'=> ['128k', 'ogg', 'audio'],
            '172'=> ['192k', 'ogg', 'audio'],
            '247'=> ['unknown', 'unknown', 'unknown'],
            '248'=> ['unknown', 'unknown', 'unknown']
        ];
        public $url,$resolution,$extension,$title,$filename,$fsize,$mediatype;
        public function __construct($sm, $title = "ytvid", $js = NULL){
            $this->url = $sm['url'];
            if(strpos($this->url,"signature=") === false)
                $this->url .= '&signature=' . $sm['sig'];
            

            if(strpos($this->url,"ratebypass=") === false)
               $this->url .= "&ratebypass=yes";
            
            $this->itag = $sm['itag'];
            $this->resolution = $this->itags[$this->itag][0];
            $this->extension = $this->itags[$this->itag][1];
            $this->title = $title;
            $this->filename = $this->title . "." .$this->extension;
            $this->fsize = '';
            $this->mediatype = $this->itags[$this->itag][2];
        } 
        
        function get_size() {
              
               $my_ch = curl_init();
               curl_setopt($my_ch, CURLOPT_URL,$this->url);
               curl_setopt($my_ch, CURLOPT_HEADER,         true);
               curl_setopt($my_ch, CURLOPT_NOBODY,         true);
               curl_setopt($my_ch, CURLOPT_RETURNTRANSFER, true);
               curl_setopt($my_ch, CURLOPT_TIMEOUT,        10);
               $r = curl_exec($my_ch);
                foreach(explode("\n", $r) as $header) {
                       if(strpos($header, 'Content-Length:') === 0) {
                               return $this->formatBytes(trim(substr($header,16))); 
                       }
                }
               return '';
       }  
       
        function formatBytes($bytes, $precision = 2) { 
                   $units = array('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'); 
                   $bytes = max($bytes, 0); 
                   $pow = floor(($bytes ? log($bytes) : 0) / log(1024)); 
                   $pow = min($pow, count($units) - 1); 
                   $bytes /= pow(1024, $pow);
                   return round($bytes, $precision) . '' . $units[$pow]; 
       }
       
        function get_filesize(){

            if(!$this->fsize){
                    $opts = array(
                      'http' => array(
                        'method' =>"GET",
                        'header' =>"content-length"
                      )
                    );
                    try{
                        $context = stream_context_create($opts);
                        $this->fsize = file_get_contents($this->url);

                    }catch(Exception $ex){
                        $this->fsize = 0;
                    }            
            }
            return $this->fsize;
        }            
        
        function download($file_target,$url = '') {
            $URL = (!$url)?$this->url:$url;
            $rh = fopen($URL,'rb');
            $len = count($http_response_header);
            for($i = 0; $i < $len; $i++){
                if(strpos($http_response_header[$i],"Content-Length:") !== false){
                    $length = (int)trim(explode(' ',$http_response_header[$i])[1]);
                    
                    break;
                }
            }
            $wh = fopen($file_target, 'wb');
            if($rh === false || $wh === false)return;
            $chunksize = 16384; $bytesdone = 0; $t0 = time();
            
             ob_start();
                while(!feof($rh)){
                    $chunk = fread($rh, $chunksize);
                    if(fwrite($wh, $chunk) === FALSE)return;
                    $elapsed = time() - $t0;   
                    $bytesdone += strlen($chunk);
                    $rate = ($bytesdone / 1024) / $elapsed;
                    $eta = ($length - $bytesdone) / ($rate * 1024);
                    $progress_stats = $bytesdone.' Bytes '. round($bytesdone * 100.0 / $length).'% received. Rate:'. round($rate).' kbps]. ETA: '. (int)$eta.' secs]';
                    echo "\r" .$progress_stats.  "\r";

                    ob_flush();
                    flush();
                }
            ob_end_flush();
            fclose($rh);
            fclose($wh);
            
            return false;
        }
           
        
}
    class vv{
        
        public $video_url,$infoUrl,$vidid,$allinfo,$gdata,$xargs,$js,$title,$videoid,$length,$streams;
        
        public function __construct($ID){

            $this->video_url = "http://www.youtube.com/watch?v="+$ID;
            $this->infoUrl = 'https://www.youtube.com/get_video_info?video_id=';

            $this->vidid = $ID;
            $this->infoUrl .= $this->vidid ."&asv=3&el=detailpage&hl=en_US";

            $opener = "";
            $keywords = "";
            parse_str(file_get_contents($this->infoUrl),$this->allinfo);
            if(!count($this->allinfo) || $this->allinfo['status'] == 'fail')throw new Exception("video not found not found");
            $this->gdata = NULL;
            $this->xargs = NULL;
            $this->js = NULL;
            $this->title = str_replace('/','-',$this->allinfo['title']);
            $this->videoid = $this->allinfo['video_id'];
            $this->length = (int)$this->allinfo['length_seconds'];
            $this->author = $this->allinfo['author'];
            $this->rating = (float)$this->allinfo['avg_rating'];
            $this->thumb = $this->allinfo['thumbnail_url'];
            $this->image = (isset($this->allinfo['iurlsd']))?$this->allinfo['iurlsd']:$this->allinfo['iurl'];
            $this->duration = ($this->length > 3600)?date('H:i:s',$this->length):date('i:s',$this->length);

            //$this->formats = [x.split("/") for x in $this->formats]
            
            
            
            
            $smap = $this->getstreammap('url_encoded_fmt_stream_map');
            
            $this->streams = [];
            for($i = 0; $i < count($smap); $i++){
              $this->streams[$i] = new Stream($smap[$i], $this->title, $this->js);
              unset($this->streams[$i]->itags);
              $this->streams[$i]->image = $this->image;
              $this->streams[$i]->rating = $this->rating;
              $this->streams[$i]->author = $this->author;
              $this->streams[$i]->thumb = $this->thumb;
              $this->streams[$i]->duration = $this->duration;
              $this->streams[$i]->videoid = $this->videoid;
            } 
           // pre($this->allinfo);
        }
        
        function getall($key = ''){
            if(!$key)return $this->streams;
            $masiv = [];
            for($i = 0; $i < count($this->streams); $i++){
                if($this->streams[$i]->extension != $key)continue;
                     $masiv[] = $this->streams[$i];
            }return $masiv;
        }

        function getstreammap($key){

            $streamMap = explode(',',$this->allinfo[$key]);
            $smaps = [];
            for($i = 0; $i < count($streamMap); $i++){
                parse_str($streamMap[$i],$smap);
                $smaps[] = $smap;  
            }    
            return $smaps;
        }

        function  getbest($type,$size = true,$extension = false){
                $object = (!$extension)?$this->streams:$extension;
                $masiv = [];
                $bool = false;
                
                for($i = 0; $i < count($object); $i++){
                    if($object[$i]->extension != $type)continue;
                    if(!$bool){$masiv = $object[$i];$bool = true;}
                     if((int)$object[$i]->resolution > (int)$masiv->resolution)
                         $masiv = $object[$i];
                }
                if($size)$masiv->fsize = $masiv->get_size();
                return $masiv;

        }       
    }
 
    //$bb = new vv($ID);
   // return $bb;
//}