Moved cache drivers outside core to extensions (plugins)

plugins/cache-redis/Predis/Protocol/Text/ProtocolProcessor.php

@@ -0,0 +1,122 @@
+<?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;
+
+use Predis\Command\CommandInterface;
+use Predis\CommunicationException;
+use Predis\Connection\CompositeConnectionInterface;
+use Predis\Protocol\ProtocolException;
+use Predis\Protocol\ProtocolProcessorInterface;
+use Predis\Response\Error as ErrorResponse;
+use Predis\Response\Iterator\MultiBulk as MultiBulkIterator;
+use Predis\Response\Status as StatusResponse;
+
+/**
+ * Protocol processor for the standard Redis wire protocol.
+ *
+ * @link http://redis.io/topics/protocol
+ *
+ * @author Daniele Alessandri <suppakilla@gmail.com>
+ */
+class ProtocolProcessor implements ProtocolProcessorInterface
+{
+    protected $mbiterable;
+    protected $serializer;
+
+    /**
+     *
+     */
+    public function __construct()
+    {
+        $this->mbiterable = false;
+        $this->serializer = new RequestSerializer();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function write(CompositeConnectionInterface $connection, CommandInterface $command)
+    {
+        $request = $this->serializer->serialize($command);
+        $connection->writeBuffer($request);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function read(CompositeConnectionInterface $connection)
+    {
+        $chunk = $connection->readLine();
+        $prefix = $chunk[0];
+        $payload = substr($chunk, 1);
+
+        switch ($prefix) {
+            case '+':
+                return new StatusResponse($payload);
+
+            case '$':
+                $size = (int) $payload;
+                if ($size === -1) {
+                    return;
+                }
+
+                return substr($connection->readBuffer($size + 2), 0, -2);
+
+            case '*':
+                $count = (int) $payload;
+
+                if ($count === -1) {
+                    return;
+                }
+                if ($this->mbiterable) {
+                    return new MultiBulkIterator($connection, $count);
+                }
+
+                $multibulk = array();
+
+                for ($i = 0; $i < $count; ++$i) {
+                    $multibulk[$i] = $this->read($connection);
+                }
+
+                return $multibulk;
+
+            case ':':
+                return (int) $payload;
+
+            case '-':
+                return new ErrorResponse($payload);
+
+            default:
+                CommunicationException::handle(new ProtocolException(
+                    $connection, "Unknown response prefix: '$prefix'."
+                ));
+
+                return;
+        }
+    }
+
+    /**
+     * Enables or disables returning multibulk responses as specialized PHP
+     * iterators used to stream bulk elements of a multibulk response instead
+     * returning a plain array.
+     *
+     * Streamable multibulk responses are not globally supported by the
+     * abstractions built-in into Predis, such as transactions or pipelines.
+     * Use them with care!
+     *
+     * @param bool $value Enable or disable streamable multibulk responses.
+     */
+    public function useIterableMultibulk($value)
+    {
+        $this->mbiterable = (bool) $value;
+    }
+}