Moved cache drivers outside core to extensions (plugins)

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

@@ -0,0 +1,116 @@
+<?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\CommunicationException;
+use Predis\Connection\CompositeConnectionInterface;
+use Predis\Protocol\ProtocolException;
+use Predis\Protocol\ResponseReaderInterface;
+
+/**
+ * Response reader for the standard Redis wire protocol.
+ *
+ * @link http://redis.io/topics/protocol
+ *
+ * @author Daniele Alessandri <suppakilla@gmail.com>
+ */
+class ResponseReader implements ResponseReaderInterface
+{
+    protected $handlers;
+
+    /**
+     *
+     */
+    public function __construct()
+    {
+        $this->handlers = $this->getDefaultHandlers();
+    }
+
+    /**
+     * Returns the default handlers for the supported type of responses.
+     *
+     * @return array
+     */
+    protected function getDefaultHandlers()
+    {
+        return array(
+            '+' => new Handler\StatusResponse(),
+            '-' => new Handler\ErrorResponse(),
+            ':' => new Handler\IntegerResponse(),
+            '$' => new Handler\BulkResponse(),
+            '*' => new Handler\MultiBulkResponse(),
+        );
+    }
+
+    /**
+     * Sets the handler for the specified prefix identifying the response type.
+     *
+     * @param string                           $prefix  Identifier of the type of response.
+     * @param Handler\ResponseHandlerInterface $handler Response handler.
+     */
+    public function setHandler($prefix, Handler\ResponseHandlerInterface $handler)
+    {
+        $this->handlers[$prefix] = $handler;
+    }
+
+    /**
+     * Returns the response handler associated to a certain type of response.
+     *
+     * @param string $prefix Identifier of the type of response.
+     *
+     * @return Handler\ResponseHandlerInterface
+     */
+    public function getHandler($prefix)
+    {
+        if (isset($this->handlers[$prefix])) {
+            return $this->handlers[$prefix];
+        }
+
+        return;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function read(CompositeConnectionInterface $connection)
+    {
+        $header = $connection->readLine();
+
+        if ($header === '') {
+            $this->onProtocolError($connection, 'Unexpected empty reponse header.');
+        }
+
+        $prefix = $header[0];
+
+        if (!isset($this->handlers[$prefix])) {
+            $this->onProtocolError($connection, "Unknown response prefix: '$prefix'.");
+        }
+
+        $payload = $this->handlers[$prefix]->handle($connection, substr($header, 1));
+
+        return $payload;
+    }
+
+    /**
+     * Handles protocol errors generated while reading responses from a
+     * connection.
+     *
+     * @param CompositeConnectionInterface $connection Redis connection that generated the error.
+     * @param string                       $message    Error message.
+     */
+    protected function onProtocolError(CompositeConnectionInterface $connection, $message)
+    {
+        CommunicationException::handle(
+            new ProtocolException($connection, $message)
+        );
+    }
+}