Moved cache drivers outside core to extensions (plugins)

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

@@ -0,0 +1,78 @@
+<?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/zunionstore
+ *
+ * @author Daniele Alessandri <suppakilla@gmail.com>
+ */
+class ZSetUnionStore extends Command
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getId()
+    {
+        return 'ZUNIONSTORE';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function filterArguments(array $arguments)
+    {
+        $options = array();
+        $argc = count($arguments);
+
+        if ($argc > 2 && is_array($arguments[$argc - 1])) {
+            $options = $this->prepareOptions(array_pop($arguments));
+        }
+
+        if (is_array($arguments[1])) {
+            $arguments = array_merge(
+                array($arguments[0], count($arguments[1])),
+                $arguments[1]
+            );
+        }
+
+        return array_merge($arguments, $options);
+    }
+
+    /**
+     * Returns a list of options and modifiers compatible with Redis.
+     *
+     * @param array $options List of options.
+     *
+     * @return array
+     */
+    private function prepareOptions($options)
+    {
+        $opts = array_change_key_case($options, CASE_UPPER);
+        $finalizedOpts = array();
+
+        if (isset($opts['WEIGHTS']) && is_array($opts['WEIGHTS'])) {
+            $finalizedOpts[] = 'WEIGHTS';
+
+            foreach ($opts['WEIGHTS'] as $weight) {
+                $finalizedOpts[] = $weight;
+            }
+        }
+
+        if (isset($opts['AGGREGATE'])) {
+            $finalizedOpts[] = 'AGGREGATE';
+            $finalizedOpts[] = $opts['AGGREGATE'];
+        }
+
+        return $finalizedOpts;
+    }
+}