Partial fix for #1225. Create a json reply helper that sets the conte…

…nt type to application/json and then json encodes the reply.

modules/gallery/helpers/json.php

@@ -0,0 +1,34 @@
+<?php defined("SYSPATH") or die("No direct script access.");
+/**
+ * Gallery - a web based photo album viewer and editor
+ * Copyright (C) 2000-2010 Bharat Mediratta
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+class json_Core {
+  /**
+   * Does the active user have this permission on this item?
+   *
+   * @param  string     $perm_name
+   * @param  Item_Model $item
+   * @return boolean
+   */
+  static function reply($message) {
+    if (!headers_sent()) {
+      header("Content-Type: application/json");
+    }
+    print json_encode($message);
+  }
+}