update PluginController to use PHPCI plugin directory as well as composer to get information about installed plugins.

PHPCI/Plugin/Util/PluginInformationCollection.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace PHPCI\Plugin\Util;
+
+class PluginInformationCollection implements InstalledPluginInformation
+{
+    /**
+     * @var InstalledPluginInformation[]
+     */
+    protected $pluginInformations = array();
+
+    public function add(InstalledPluginInformation $information)
+    {
+        $this->pluginInformations[] = $information;
+    }
+
+    /**
+     * Returns an array of objects. Each one represents an available plugin
+     * and will have the following properties:
+     *      name  - The friendly name of the plugin (may be an empty string)
+     *      class - The class of the plugin (will include namespace)
+     * @return \stdClass[]
+     */
+    public function getInstalledPlugins()
+    {
+        $arr = array();
+        foreach($this->pluginInformations as $single) {
+            $arr = array_merge($arr, $single->getInstalledPlugins());
+        }
+        return $arr;
+    }
+
+    /**
+     * Returns an array of all the class names of plugins that have been
+     * loaded.
+     *
+     * @return string[]
+     */
+    public function getPluginClasses()
+    {
+        $arr = array();
+        foreach($this->pluginInformations as $single) {
+            $arr = array_merge($arr, $single->getPluginClasses());
+        }
+        return $arr;
+    }
+
+}