<?php
header('Content-Type: application/json; charset=utf-8');

if (isset($_GET['id'])) {
    $id=$_GET['id'];

    // Delete sig file if is old 60 sec
    if (is_file('sig.php')) {
        $filelastmodified = filemtime('sig.php');
        if((time() - $filelastmodified) > 60) {
            unlink('sig.php');
        }
    }

    function getc($url) {
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_ENCODING, 'gzip');
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);
        $data = curl_exec($ch);
        curl_close($ch);

        return $data;
    }

    function cut_yt($ganti) {
        $arayganti = array('Youtube','youtube','YouTube');
        $ganti = str_replace($arayganti,'',$ganti);
        return $ganti;
    }

    function exformat($itag) {
        switch ($itag) {
            case "5":
                return "flv";
                break;
            case "6":
                return "flv";
                break;
            case "13":
                return "3gp";
                break;
            case "17":
                return "3gp";
                break;
            case "18":
                return "mp4";
                break;
            case "22":
                return "mp4";
                break;
            case "34":
                return "flv";
                break;
            case "35":
                return "flv";
                break;
            case "36":
                return "3gp";
                break;
            case "37":
                return "mp4";
                break;
            case "38":
                return "mp4";
                break;
            case "43":
                return "webm";
                break;
            case "44":
                return "webm";
                break;
            case "45":
                return "webm";
                break;
            case "46":
                return "webm";
                break;
            case "59":
                return "mp4";
                break;
            case "78":
                return "mp4";
                break;
            case "82":
                return "mp4";
                break;
            case "83":
                return "mp4";
                break;
            case "84":
                return "mp4";
                break;
            case "85":
                return "mp4";
                break;
            case "100":
                return "webm";
                break;
            case "101":
                return "webm";
                break;
            case "102":
                return "webm";
                break;
            case "91":
                return "mp4";
                break;
            case "92":
                return "mp4";
                break;
            case "93":
                return "mp4";
                break;
            case "94":
                return "mp4";
                break;
            case "95":
                return "mp4";
                break;
            case "96":
                return "mp4";
                break;
            case "132":
                return "mp4";
                break;
            case "151":
                return "mp4";
                break;
            case "133":
                return "mp4";
                break;
            case "134":
                return "mp4";
                break;
            case "135":
                return "mp4";
                break;
            case "136":
                return "mp4";
                break;
            case "137":
                return "mp4";
                break;
            case "138":
                return "mp4";
                break;
            case "160":
                return "mp4";
                break;
            case "212":
                return "mp4";
                break;
            case "264":
                return "mp4";
                break;
            case "298":
                return "mp4";
                break;
            case "299":
                return "mp4";
                break;
            case "266":
                return "mp4";
                break;
            case "139":
                return "m4a";
                break;
            case "140":
                return "m4a";
                break;
            case "141":
                return "m4a";
                break;
            case "256":
                return "m4a";
                break;
            case "258":
                return "m4a";
                break;
            case "325":
                return "m4a";
                break;
            case "328":
                return "m4a";
                break;
            case "167":
                return "webm";
                break;
            case "168":
                return "webm";
                break;
            case "169":
                return "webm";
                break;
            case "170":
                return "webm";
                break;
            case "218":
                return "webm";
                break;
            case "219":
                return "webm";
                break;
            case "278":
                return "webm";
                break;
            case "242":
                return "webm";
                break;
            case "243":
                return "webm";
                break;
            case "244":
                return "webm";
                break;
            case "245":
                return "webm";
                break;
            case "246":
                return "webm";
                break;
            case "247":
                return "webm";
                break;
            case "248":
                return "webm";
                break;
            case "271":
                return "webm";
                break;
            case "272":
                return "webm";
                break;
            case "302":
                return "webm";
                break;
            case "303":
                return "webm";
                break;
            case "308":
                return "webm";
                break;
            case "313":
                return "webm";
                break;
            case "315":
                return "webm";
                break;
            case "171":
                return "webm";
                break;
            case "249":
                return "webm";
                break;
            case "250":
                return "webm";
                break;
            case "251":
                return "webm";
                break;
            case "394":
                return "mp4";
                break;
            case "395":
                return "mp4";
                break;
            case "396":
                return "mp4";
                break;
            case "397":
                return "mp4";
                break;
            case "398":
                return "mp4";
                break;
            case "399":
                return "mp4";
                break;
            default:
                return $itag;
                break;
        }
    }

    $a = getc("https://www.youtube.com/embed/".$id);

    $ccc=explode('s/player/', $a);
    $ddd=explode('/www-player.css', $ccc[1]);

    $gsts = file_get_contents('https://www.youtube.com/s/player/'.$ddd[0].'/player_ias.vflset/en_US/base.js');

    function getchiper($decipherScript) {
        $decipherPatterns = explode('.split("")', $decipherScript);
        unset($decipherPatterns[0]);
        foreach ($decipherPatterns as $value) {
            $value = explode('.join("")', explode('}', $value)[0]);
            if (count($value) === 2) {
                $value = explode(';', $value[0]);
                array_pop($value);
                unset($value[0]);
                $decipherPatterns = implode(';', $value);
                break;
            }
        }
        preg_match_all('/(?<=;).*?(?=\[|\.)/', $decipherPatterns, $deciphers);
        if ($deciphers && count($deciphers[0]) >= 2) {
            $deciphers = $deciphers[0][0];
            $deciphersObjectVar = $decipherPatterns ;
            $decipher = explode($deciphers . '={', $decipherScript)[1];
            $decipher = str_replace(["\n", "\r"], '', $decipher);
            $decipher = explode('}};', $decipher)[0];
            $decipher = explode('},', $decipher);
            // Convert deciphers to object
            $deciphers = [];

            foreach ($decipher as &$function) {
                $deciphers[explode(':function', $function)[0]] = explode('){', $function)[1];
            }
            // Convert pattern to array
            $decipherPatterns = str_replace($deciphersObjectVar . '.', '', $decipherPatterns);
            $decipherPatterns = str_replace($deciphersObjectVar . '[', '', $decipherPatterns);
            $decipherPatterns = str_replace(['](a,', '(a,'], '->(', $decipherPatterns);
            $decipherPatterns = explode(';', $decipherPatterns);
            $patterns =$decipherPatterns;
            $deciphers =$deciphers;

            if (!file_exists('sig.php')) {
                for ($i=0; $i < count($patterns); $i++) {
                    $executes = explode('->', $patterns[$i]);
                    $execute=explode('.', $executes[0]);
                    $number = intval(str_replace(['(', ')'], '', $executes[1]));
                    $execute = $deciphers[$execute[1]];
                    switch ($execute) {
                    case 'a.reverse()':
                        $processSignature = '$reverse';
                        break;
                    case 'var c=a[0];a[0]=a[b%a.length];a[b]=c':
                        $processSignature= '$length';
                        break;
                    case 'var c=a[0];a[0]=a[b%a.length];a[b%a.length]=c':
                        $processSignature= '$lengtha';
                        break;
                    case 'a.splice(0,b)':
                        $processSignature= '$splice';
                        break;
                    default:
                        die("\n==== Decipher dictionary was not found ====");

                        break;
                    }
                    $myfile = fopen('sig.php', "a+") or die("Unable to open file!");
                    if ($i==0) {
                        fwrite($myfile, '<?php $a = str_split($s);');
                    }
                    fwrite($myfile, $processSignature.'($a,'.$number.');');
                    fclose($myfile);
                }
            }
        }
    }

    function sig($s){
        $reverse=function(&$a){
            $a = array_reverse($a);
        };
        $splice=function(&$a, $b){
            $a = array_slice($a, $b);
        };
        $length = function(&$a, $b){
            $c = $a[0];
            $a[0] = $a[$b % count($a)];
            $a[$b] = $c;
        };
        $lengtha = function(&$a, $b){
            $c = $a[0];
            $a[0] = $a[$b%count($a)];
            $a[$b%count($a)] = $c;
        };

        include('sig.php');
        return join('',$a);
    }


    getchiper($gsts);
    $data = getc("https://www.youtube.com/get_video_info?video_id=".$id."&asv=3&el=detailpage&hl=en_US");
    parse_str($data,$info);
    $streams = $info['player_response'];
    $jsn_str = str_replace("\u0026","&", $streams);
    $streamin_data_json = json_decode($jsn_str, true);

    // Microdata
    $vidtitle = $streamin_data_json["videoDetails"]["title"];
    $vidId  = $streamin_data_json["videoDetails"]["videoId"];

    if (isset( $streamin_data_json["videoDetails"]["shortDescription"] )) {
        $viddes = $streamin_data_json["videoDetails"]["shortDescription"];
    } else {
        $viddes = null;
    }

    $vidpub = $streamin_data_json["microformat"]["playerMicroformatRenderer"]["publishDate"];
    $vidviewCount = $streamin_data_json["videoDetails"]["viewCount"];
    $vidauthor = $streamin_data_json["videoDetails"]["author"];
    $vidauthorid = $streamin_data_json["videoDetails"]["channelId"];
    $vidauthourl = "channel/{$vidauthorid}";
    $vidtime = $streamin_data_json["videoDetails"]["lengthSeconds"];
    $vidisLiveContent = $streamin_data_json["videoDetails"]["isLiveContent"];

    // thumbs
    $vidthumb = array();
    foreach ($streamin_data_json["videoDetails"]["thumbnail"]["thumbnails"] as $data) {
        $url = $data['url'];
        $values = array(
            'url' => $url,
            'width' => $data['width'],
            'height' => $data['height']
        );
        array_push($vidthumb, $values);
    }

    // keywords
    $vidkeywords = array();
    if ( isset($streamin_data_json["videoDetails"]["keywords"]) ) {
        foreach ($streamin_data_json["videoDetails"]["keywords"] as $data) {
            array_push($vidkeywords, $data);
        }
    }

    // output microdata
    $json['title']=$vidtitle;
    $json['videoId']=$vidId;
    $json['videoThumbnails']=$vidthumb;
    $json['description']=$viddes;
    $json['publishedText']=$vidpub;
    $json['viewCount']=$vidviewCount;
    $json['keywords']=$vidkeywords;
    $json['author']=$vidauthor;
    $json['authorId']=$vidauthorid;
    $json['authorUrl']=$vidauthourl;
    $json['lengthSeconds']=$vidtime;
    $json['liveNow']=$vidisLiveContent;

    // streams
    if (isset($streamin_data_json["streamingData"])) {

        if (isset($streamin_data_json["streamingData"]["formats"])) {
            $strF=$streamin_data_json["streamingData"]["formats"];
        }

        if (isset($streamin_data_json["streamingData"]["adaptiveFormats"])) {
            $strA=$streamin_data_json["streamingData"]["adaptiveFormats"];
        }

        $vdef = array();
        if (isset($strF)) {
            foreach ($strF as $stream) {
                if (isset($stream["signatureCipher"])) {
                    parse_str($stream["signatureCipher"],$dturl);
                    $values = array(
                        'url' => $dturl['url'].'&sig='.sig($dturl['s']),
                        'itag' => $stream['itag'],
                        'type' => $stream['mimeType'],
                        'quality' => $stream['quality'],
                        'fps' => $stream['fps'],
                        'resolution' => $stream['qualityLabel'],
                        'qualityLabel' => $stream['qualityLabel'],
                        'container' => exformat($stream['itag']),
                        'size' => $stream['width'].'x'.$stream['height'],
                    );
                    array_push($vdef, $values);
                } else {
                    if (!empty($strF['url'])) {
                        $values = array(
                            'url' => $strF['url'],
                        );
                        array_push($vdef, $values);
                    }
                }
            }
        }

        $aud = array();
        $vid = array();
        if (isset($strF)) {
            foreach ($strF as $stream) {
                if (isset( $stream['url'] )) {
                    if (preg_match('/video/', $stream['mimeType'])) {
                        $values = array(
                            'url' => $stream['url'],
                            'itag' => $stream['itag'],
                            'type' => $stream['mimeType'],
                            'quality' => $stream['quality'],
                            'fps' => $stream['fps'],
                            'resolution' => $stream['qualityLabel'],
                            'qualityLabel' => $stream['qualityLabel'],
                            'container' => exformat($stream['itag']),
                            'size' => $stream['width'].'x'.$stream['height'],
                        );
                        array_push($vdef, $values);
                    }
                }
            }
        }

        if (isset($strA)) {
            foreach ($strA as $stream) {
                if (isset($stream["signatureCipher"])) {
                    parse_str($stream["signatureCipher"],$dturl);
                    $stream['url']=$dturl['url'].'&sig='.sig($dturl['s']);
                }

                if (preg_match('/audio/', $stream['mimeType'])) {
                    $url = $stream['url'];
                    $values = array(
                        'url' => $url,
                        'itag' => $stream['itag'],
                        'type' => $stream['mimeType'],
                        'quality' => $stream['quality'],
                        'container' => exformat($stream['itag']),
                    );
                    array_push($aud, $values);
                }

                if (preg_match('/video/', $stream['mimeType'])) {
                    $values = array(
                        'url' => $stream['url'],
                        'itag' => $stream['itag'],
                        'type' => $stream['mimeType'],
                        'quality' => $stream['quality'],
                        'fps' => $stream['fps'],
                        'resolution' => $stream['qualityLabel'],
                        'qualityLabel' => $stream['qualityLabel'],
                        'container' => exformat($stream['itag']),
                        'size' => $stream['width'].'x'.$stream['height'],
                    );
                    array_push($vid, $values);
                }
            }
        }
        $json['adaptiveFormats'] = array_merge($vid, $aud);
        $json['formatStreams'] = $vdef;
    } else {
        $vdef = array();
        $aud = array();
        $vid = array();
        $json['adaptiveFormats'] = array_merge($vid, $aud);
        $json['formatStreams'] = $vdef;
    }
    echo json_encode($json);
} else {
    $json = array(
        'query' => 'none',
    );
    echo json_encode($json, JSON_FORCE_OBJECT);
}