Added a page to display details about a source

Placeholder source detail page which checks that the source is valid and lies below the configured rips.source_dir.

pages/browse/source-details.php

@@ -0,0 +1,24 @@
+<?php
+
+$main   = HandBrakeCluster_Main::instance();
+$req    = $main->request();
+$config = $main->config();
+
+// Grab the name of this source
+$source_id = $req->get('id');
+$source = base64_decode(str_replace('-', '/', $source_id));
+$real_source = realpath($source);
+
+// Ensure the source is a valid directory, and lies below the configured source_dir
+if (!is_dir($source)) {
+    return;
+}
+
+$real_source_dir = realpath($config->get('rips.source_dir'));
+if (substr($real_source, 0, strlen($real_source_dir)) != $real_source_dir) {
+    return;
+}
+
+$this->smarty->assign('source', $source);
+
+?>