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<?php
$baseDir = "mp3s";
$soundcloudURL = "http://soundcloud.com/ninja-tune/sets/solid-steel-radio-shows/"; 

$urlBits = str_replace('http://', '', $soundcloudURL);
$urlBits = preg_replace('@/$@', '', $urlBits);
$urlBits = explode("/", $urlBits);

/**
 * http://soundcloud.com/ninja-tune/sets/solid-steel-radio-shows/
 * Array
 * (
 *     [0] => soundcloud.com
 *     [1] => ninja-tune
 *     [2] => sets
 *     [3] => solid-steel-radio-shows
 * )
 */

array_shift($urlBits);
$storage_dir = $baseDir . "/" . implode("/", $urlBits);
if (!file_exists($storage_dir))
{
	mkdir($storage_dir, 0755, true);
}

$playListFile = $storage_dir . "/" . $urlBits[count($urlBits) - 1] . ".m3u";
if (file_exists($playListFile))
{
	unlink($playListFile);
}

$playList = array();

$file = getPage($soundcloudURL);
if (!$file) die ("Can't get SoundCloud page\n");

$rows = explode("\n", $file);

$uris = array();
$pattern = '@"/.+download"@i';
$baseURL = 'http://soundcloud.com';
foreach ($rows as $row)
{
	preg_match($pattern, $row, $matches);
	if (count($matches) > 0)
	{
		$uris[] = str_replace("\"", '', $matches[0]);
	}
}

$i = 0;
$uriCount = count($uris);
foreach ($uris as $uri)
{
	$i++;
	echo "\nFetching file " . $i . " of " . $uriCount . "\n";

	$uriHeaders = get_headers($baseURL . $uri);
	foreach ($uriHeaders as $header)
	{
		preg_match("/^Content\-Disposition\: attachment\;filename=\"(.*)\"$/", $header, $matches);
		if (isset($matches[1]))
		{
			$outputFilename = $matches[1];
			break;
		}
	}

	$playList[] = $outputFilename;

	if (file_exists($storage_dir . "/" . $outputFilename))
	{
		echo "File exists, skipping.\n";
		continue;
	}

	$command = "wget \"$baseURL$uri\" -O \"$storage_dir/$outputFilename\"";
	`$command`;
}

echo "\nWriting play list\n";
file_put_contents($playListFile, implode("\n", array_reverse($playList)), FILE_APPEND);
echo "\nDone\n";


function getPage($url, $referer = false, $timeout = 30, $header = false)
{
	$curl = curl_init();

	if(strstr($referer,"://")){
		curl_setopt ($curl, CURLOPT_REFERER, $referer);
	}

	curl_setopt ($curl, CURLOPT_URL, $url);
	curl_setopt ($curl, CURLOPT_TIMEOUT, $timeout);
	curl_setopt ($curl, CURLOPT_USERAGENT, sprintf("Mozilla/%d.0",rand(4,5)));
	curl_setopt ($curl, CURLOPT_HEADER, (int)$header);
	curl_setopt ($curl, CURLOPT_RETURNTRANSFER, 1);
	curl_setopt ($curl, CURLOPT_SSL_VERIFYPEER, 0);

	$html = curl_exec ($curl);
	curl_close ($curl);

	return $html;
}