use serde::{Deserialize, Serialize};
use std::fmt::Debug;

use crate::model::{instance::Instance, user::User};

pub mod authentication;
pub mod discovery;
pub mod error;
pub mod handshake;
pub mod issues;
pub mod repository;
pub mod user;

#[derive(Clone, Debug, Serialize, Deserialize, thiserror::Error)]
pub enum ErrorMessage {
    #[error("user {0} doesn't exist or isn't valid in this context")]
    InvalidUser(User),
    #[error("internal error: shutdown")]
    Shutdown,
}

pub trait MessageTarget {
    fn target(&self) -> Option<Instance> {
        None
    }
}