Moved cache drivers outside core to extensions (plugins)

plugins/cache-redis/Predis/Command/PubSubPubsub.php

@@ -0,0 +1,61 @@
+<?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\Command;
+
+/**
+ * @link http://redis.io/commands/pubsub
+ *
+ * @author Daniele Alessandri <suppakilla@gmail.com>
+ */
+class PubSubPubsub extends Command
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getId()
+    {
+        return 'PUBSUB';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function parseResponse($data)
+    {
+        switch (strtolower($this->getArgument(0))) {
+            case 'numsub':
+                return self::processNumsub($data);
+
+            default:
+                return $data;
+        }
+    }
+
+    /**
+     * Returns the processed response to PUBSUB NUMSUB.
+     *
+     * @param array $channels List of channels
+     *
+     * @return array
+     */
+    protected static function processNumsub(array $channels)
+    {
+        $processed = array();
+        $count = count($channels);
+
+        for ($i = 0; $i < $count; ++$i) {
+            $processed[$channels[$i]] = $channels[++$i];
+        }
+
+        return $processed;
+    }
+}