Added source browser

Added a SourceLister class, which enumerates all DVD folders below a given starting directory.
Added a source browse page to list the available sources

HandBrakeCluster/Rips/SourceLister.class.php

@@ -0,0 +1,56 @@
+<?php
+
+class HandBrakeCluster_Rips_SourceLister {
+    
+    protected $base_directory;
+    protected $sources = array();
+
+    public function __construct($base_directory) {
+        $this->base_directory = $base_directory;
+        
+        $this->scan();
+    }
+    
+    public function scan() {
+        if (!is_dir($this->base_directory)) {
+            throw new HandBrakeCluster_Exception_InvalidSourceDir($this->base_directory);
+        }
+        
+        // Define a queue of directories to scan, starting with the base directory,
+        // and keep going until they have all been scanned
+        $scan_directories = array($this->base_directory);
+        while ($scan_directories) {
+            $dir = dir(array_shift($scan_directories));
+            
+            while (($entry = $dir->read()) !== false) {
+                if ($entry == '.' || $entry == '..') {
+                    continue;
+                }
+                
+                // Skip any non-directories
+                $source = $dir->path . DIRECTORY_SEPARATOR . $entry;
+                if (!is_dir($source)) {
+                    continue;
+                }
+                
+                // Accept this dir as a source if it contains a VIDEO_TS dir,
+                // otherwise add the dir to the queue to scan deeper
+                $source_vts = $source . DIRECTORY_SEPARATOR . 'VIDEO_TS';
+                if (is_dir($source_vts)) {
+                    $this->sources[] = $source_vts;
+                } else {
+                    $scan_directories[] = $source;
+                }
+            }
+            
+            $dir->close();
+        }
+    }
+    
+    public function sources() {
+        return $this->sources;
+    }
+    
+};
+
+?>