-// ttAccessCheck is used to check whether user is allowed to proceed. This function is used
-// as an initial check on all publicly available pages.
-function ttAccessCheck($required_rights)
+// ttValidCondition is used to check user input to validate a notification condition.
+function ttValidCondition($val, $emptyValid = true)
+{
+ $val = trim($val);
+ if (strlen($val) == 0)
+ return ($emptyValid ? true : false);
+
+ // String must not be XSS evil (to insert JavaScript).
+ if (stristr($val, '<script>') || stristr($val, '<script '))
+ return false;
+
+ if (!preg_match("/^count\s?>\s?\d+$/", $val))
+ return false;
+
+ return true;
+}
+
+// ttAccessAllowed checks whether user is allowed access to a particular page.
+// It is used as an initial check on all publicly available pages
+// (except login.php, register.php, and others where we don't have to check).
+function ttAccessAllowed($required_right)