function?auth_user?()?{
????global?$db;

????//?Get?vars
????$username?=?r('username');
????$password?=?r('password');
????$lastactive?=?r('lastactive');

????if?(empty($username)?OR?empty($password)?OR?empty($lastactive))?{
????????return_error('Invalid?user.?Please?logout?and?try?again.',?10);
????????die();
????}

????//?Authenticate?user
????$user?=?$db->GetRow("SELECT?userid,?username,?password,?lastactive?FROM?user?WHERE?username?=???AND?password?=??",?array($username,?$password));

????if?($user?==?false)?{
????????return_error('Invalid?user.?Please?logout?and?try?again.',?10);
????????die();
????}

????return?$user;
}

function?send_userlist()?{
????global?$db;

????//?Remove?any?inactive?users?(no?ping?for?15?seconds)
????remove_inactive_users();

????//?Get?userlist
????$userlist?=?$db->GetAll("SELECT?userid,?username?FROM?`user`");

????//?Queue?command
????json_queue_add?('add_userlist',?array('userlist'?=>?$userlist));

????return?true;
}

function?remove_inactive_users()?{
????global?$db;

????//?Remove?any?inactive?users?(no?ping?for?15?seconds)
????$inactive?=?time()-15;
????$db->execute?("DELETE?FROM?`user`?WHERE?lastactive?,?array($inactive));
}

function?update_lastactive($user)?{
????global?$db;

????$lastactive?=?time();

????//?Update?user
????$db->execute?("UPDATE?`user`?SET?lastactive?=???WHERE?userid?=??",?array($lastactive,?$user['userid']));

????//?Send?update?command
????json_queue_add?('update_lastactive',?array('lastactive'?=>?$lastactive));

????return?true;
}


?>