public function login($username = NULL, $password = NULL)
	{
        if($username === NULL)
        {
            $username = $this->input->post('username');
            $password = $this->input->post('password');
        }
        
        if(empty($username) || empty($password))
            return FALSE;

		$user = $this->get_by(array(
            'username' => $username,
            'password' => $this->hash($password),
        ), TRUE);
        
        // Additional check to login with email
        if(sw_count($user) == 0)
        {
    		$user = $this->get_by(array(
                'mail' => $username,
                'password' => $this->hash($password),
            ), TRUE);
        }
        
        if(sw_count($user))
        {   
            if($user->activated == FALSE && ($user->type == 'USER' || $user->type == 'AGENT'))
            {
                // User and not activated
            }
            else
            {
                // Update last login data
                $this->db->where('id', $user->id);
                $this->db->update($this->_table_name, array('last_login' => date('Y-m-d H:i:s'))); 
                
                $profile_image = '';
                if(!empty($user->repository_id))
                {
                    $this->_table_name = 'file';
                    $this->_order_by = 'id';
                    // Get profile image from repository
            		$image = $this->get_by(array(
                        'repository_id' => $user->repository_id
                    ), TRUE);
                    $this->_table_name = 'user';
                    $this->_order_by = 'name_surname ';
                    if(sw_count($image))
                    {
                        $profile_image = 'files/thumbnail/'.$image->filename;
                    }
                }

                // Log in user
                $data = array(
                    'name_surname'=>$user->name_surname,
                    'username'=>$user->username,
                    'remember'=>(bool)$this->input->post('remember'),
                    'id'=>$user->id,
                    'lang'=>$user->language,
                    'user_namesurname'=>$user->username,
                    'idcode'=>$user->user_idcode,
                    'last_login'=>$user->last_login,
                    'loggedin'=>TRUE,
                    'type'=>$user->type,
                    'profile_image'=>$profile_image,
                    'last_activity'=>time()
                );
                $this->session->set_userdata($data);
                
                $this->user_session_data = $data;
                
                return TRUE;                
            }
        }
        
        return FALSE;
	}