<?php
define("MUSIC_FOLDER", __DIR__);
define("ID3v2", false);


function dd()  
    echo "<pre>"; call_user_func_array("var_dump", func_get_args());
    die();
 

function getinfo($file)  
    $cmd = 'id3info "' . MUSIC_FOLDER . "/" . $file . '"';
    exec($cmd, $output);
    $res = [];
    foreach($output as $line)  
    if (str_starts_with($line, "=== "))  
        $key = explode(" ", $line)[1];
        $val = end(explode(": ", $line, 2));
        $res[$key] = $val;
     
     
    if (isset($res['TPE1'])   isset($res['TIT2']))
    echo "#EXTINF: , " . ($res['TPE1'] ?? "Unk") . " - " . ($res['TIT2'] ?? "Untl") . "\r\n";
    if (isset($res['TALB']))
    echo "#EXTALB: " . $res['TALB'] . "\r\n";
 


function pathencode($path, $name)  
    $path = urlencode($path);
    $path =  str_replace("%2F", "/", $path);
    $name = urlencode($name);
    if ($path != "") $path = "/" . $path;
    return $path . "/" . $name;
 

function serve_playlist($path)  
    echo "#EXTM3U";
    echo "# PATH: $path\n\r";
    foreach (glob(MUSIC_FOLDER . "/$path/*") as $filename)  
    $name = basename($filename);
    if (is_dir($filename))  
        echo pathencode($path, $name) . ".m3u\r\n";
     
    $t = explode(".", $filename);
    $ext = array_pop($t);
    if (in_array($ext, ["mp3", "ogg", "flac", "mp4", "m4a"]))  
        if (ID3v2)  
 	   getinfo($path . "/" . $name);
          else  
 	   echo "#EXTINF: , " . $path . "/" . $name . "\r\n";
         
        echo pathencode($path, $name) . "\r\n";
     
     
    die();
 



$path = $_SERVER["REQUEST_URI"];
$path = urldecode($path);
$path = trim($path, "/");

if (str_ends_with($path, ".m3u"))  
    $path = str_replace(".m3u", "", $path);

    serve_playlist($path);
 

$path = MUSIC_FOLDER . "/" . $path;
if (file_exists($path) && is_file($path))  
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    header('Content-Length: ' . filesize($path));
    readfile($path);