public string setForumMaxModerators(string forumName, int maxModerators, string requestingUser) { List <string> input = new List <string>() { forumName }; if (Constants.isValidInput(input)) { lock (o) { if (_um.getUserPermissionsForForum(forumName, requestingUser) != permission.SUPER_ADMIN && _um.getUserPermissionsForForum(forumName, requestingUser) != permission.ADMIN) { return("Unauthorized user"); } int maxNumOfModerators = _um.getMaxModerators(forumName); if (maxNumOfModerators > maxModerators) { return(Constants.ILLEGAL_ACTION); } if (!_fm.setForumMaxModerators(forumName, maxModerators)) { return(Constants.forumDoesntExist(forumName)); } return(Constants.SUCCESS); } } return(Constants.INVALID_INPUT); }