A1_Core::find_user PHP Method

    protected function find_user()
    {
        // Get the user from the session
        $user = $this->session()->get($this->_config['session']['key']);
        // User found in session, return
        if (is_object($user)) {
            if ($user->loaded()) {
                return $user;
            } else {
                // reloading failed - user is deleted but still exists in session
                // logout (so session & cookie are cleared)
                $this->logout(TRUE);
                return FALSE;
            }
        }
        if ($this->_config['cookie']['lifetime']) {
            if ($token = Cookie::get($this->_config['cookie']['key'])) {
                list($hash, $username) = explode('.', $token, 2);
                if (strlen($hash) === 32 and $username !== NULL) {
                    // load user using username
                    $user = $this->_load_user($username);
                    // validates token vs hash
                    if ($user->loaded() and $this->check($hash, $user->{$this->_config['columns']['token']})) {
                        return $this->complete_login($user, TRUE);
                    }
                }
            }
        }
        return FALSE;
    }