Renamed the codebase to RippingCluster

Since the new design is engine agnostic, removed HandBrake from the
class names.

lib/RippingCluster/PluginFactory.class.php

@@ -0,0 +1,50 @@
+<?php
+
+abstract class RippingCluster_PluginFactory {
+    
+    static protected $validPlugins;
+    
+    abstract public static function init();
+    
+    public static function getValidPlugins() {
+        return array_keys(self::$validPlugins);
+    }
+    
+    protected static function findPlugins($directory) {
+        $plugins = array();
+        
+        $iterator = new RippingCluster_Utility_ClassFilesIterator(new RippingCluster_Utility_VisibleFilesIterator(new DirectoryIterator(RippingCluster_Lib . $directory)));
+        
+        foreach ($iterator as /** @var SplFileInfo */ $file) {
+            $plugin = preg_replace('/.class.php$/', '', $file->getFilename());
+            $plugins[] = $plugin;
+        }
+        
+        return $plugins;
+    }
+    
+    protected static function loadPlugins($plugins, $prefix) {
+        self::$validPlugins = array();
+        
+        foreach ($plugins as $plugin) {
+            $fullClassname = $prefix . $plugin;
+            if ( ! class_exists($fullClassname, true)) {
+                echo "Cannot load $fullClassname\n";
+                continue;
+            }
+            
+            if ( ! in_array('RippingCluster_Worker_IPlugin', class_implements($fullClassname))) {
+                echo "$plugin does not implement the necessary interfaces\n";
+                continue;
+            }
+            
+            // Initialise the plugin
+            call_user_func(array($fullClassname, 'init'));
+        
+            self::$validPlugins[$plugin] = $fullClassname;
+        }
+    }
+    
+}
+
+?>