new function to get Random Books

mobile.netbiblio.php

@@ -262,6 +262,14 @@ class NetBiblio extends WebService
         return $this->AddFiles($book);
     }
 
+    public function GetRandomBooks($number = 100) {
+        $sql = "SELECT TOP $number NoticeId FROM Notices ORDER BY NEWID();";
+        $ids = Connection::execute($sql)->to_array();
+        $ids = array_map(function($a) { return $a['NoticeId']; }, $ids);
+        $books = AudioBook::findBy('NoticeId', $ids, true);
+        return array_values(array_map(array($this, 'AddFiles'), $books));
+    }
+
     public function Search($query, $start, $limit)
     {
         $query = array(