//! API errors
//use super::*;
use std::{
    error,
    fmt,
};
use warp::{
    Rejection,
    Reply,
};

#[derive(Debug)]
pub enum ApiError {
    Body,
}

impl ApiError
{
    #[inline] fn error_code(&self) -> warp::http::StatusCode
    {
	status!(match self {
	    Self::Body => 422,
	})
    }
}

impl warp::reject::Reject for ApiError{}
impl error::Error for ApiError{}
impl std::fmt::Display for ApiError
{
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
    {
	match self {
	    Self::Body => write!(f, "invalid data in request body"),
	}
    }
}

impl From<std::str::Utf8Error> for ApiError
{
    fn from(_: std::str::Utf8Error) -> Self
    {
	Self::Body
    }
}

// Handles API rejections
pub async fn rejection(err: Rejection) -> Result<impl Reply, Rejection>
{
    if let Some(api) = err.find::<ApiError>() {
	Ok(warp::reply::with_status(format!("ApiError: {}\n", api), api.error_code()))
    } else {
	Err(err)
    }
}