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<?php
/*
* This file is part of the Predis package.
*
* (c) Daniele Alessandri <suppakilla@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Predis\Protocol\Text\Handler;
use Predis\CommunicationException;
use Predis\Connection\CompositeConnectionInterface;
use Predis\Protocol\ProtocolException;
/**
* Handler for the multibulk response type in the standard Redis wire protocol.
* It returns multibulk responses as PHP arrays.
*
* @link http://redis.io/topics/protocol
*
* @author Daniele Alessandri <suppakilla@gmail.com>
*/
class MultiBulkResponse implements ResponseHandlerInterface
{
/**
* {@inheritdoc}
*/
public function handle(CompositeConnectionInterface $connection, $payload)
{
$length = (int) $payload;
if ("$length" !== $payload) {
CommunicationException::handle(new ProtocolException(
$connection, "Cannot parse '$payload' as a valid length of a multi-bulk response."
));
}
if ($length === -1) {
return;
}
$list = array();
if ($length > 0) {
$handlersCache = array();
$reader = $connection->getProtocol()->getResponseReader();
for ($i = 0; $i < $length; ++$i) {
$header = $connection->readLine();
$prefix = $header[0];
if (isset($handlersCache[$prefix])) {
$handler = $handlersCache[$prefix];
} else {
$handler = $reader->getHandler($prefix);
$handlersCache[$prefix] = $handler;
}
$list[$i] = $handler->handle($connection, substr($header, 1));
}
}
return $list;
}
}