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<?php
namespace YouTube;
use YouTube\Models\StreamFormat;
use YouTube\Responses\PlayerApiResponse;
use YouTube\Responses\VideoPlayerJs;
use YouTube\Utils\Utils;
class PlayerResponseParser
{
/**
* @var PlayerApiResponse
*/
private $response;
/** @var VideoPlayerJs */
protected $videoPlayerJs;
protected function __construct(PlayerApiResponse $response)
{
$this->response = $response;
}
public static function createFrom(PlayerApiResponse $playerApiResponse)
{
return new static($playerApiResponse);
}
public function setPlayerJsResponse(VideoPlayerJs $videoPlayerJs)
{
$this->videoPlayerJs = $videoPlayerJs;
}
/**
* @return StreamFormat[]
*/
public function parseLinks($signatureDecrypter = null)
{
$formats_combined = $this->response->getAllFormats();
// final response
$return = array();
foreach ($formats_combined as $format) {
// appear as either "cipher" or "signatureCipher"
$cipher = Utils::arrayGet($format, 'cipher', Utils::arrayGet($format, 'signatureCipher', ''));
// some videos do not need to be decrypted!
if (isset($format['url'])) {
$return[] = new StreamFormat($format);
continue;
}
$cipherArray = Utils::parseQueryString($cipher);
$url = Utils::arrayGet($cipherArray, 'url');
$sp = Utils::arrayGet($cipherArray, 'sp'); // used to be 'sig'
$signature = Utils::arrayGet($cipherArray, 's');
$streamUrl = new StreamFormat($format);
if ($this->videoPlayerJs) {
$decoded_signature = (new SignatureDecoder())->decode($signature, $this->videoPlayerJs->getResponseBody());
$decoded_url = $url . '&' . $sp . '=' . $decoded_signature;
$streamUrl->url = $decoded_url;
} else {
$streamUrl->url = $url;
}
$return[] = $streamUrl;
}
return $return;
}
}