SolarEnergy/central_backend/src/server/custom_error.rs

use actix_web::body::BoxBody;
use actix_web::http::StatusCode;
use actix_web::HttpResponse;
use std::error::Error;
use std::fmt::{Display, Formatter};
use std::io::ErrorKind;

/// Custom error to ease controller writing
#[derive(Debug)]
pub enum HttpErr {
    Err(anyhow::Error),
    HTTPResponse(HttpResponse),
}

impl Display for HttpErr {
    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
        match self {
            HttpErr::Err(err) => Display::fmt(err, f),
            HttpErr::HTTPResponse(res) => {
                Display::fmt(&format!("HTTP RESPONSE {}", res.status().as_str()), f)
            }
        }
    }
}

impl actix_web::error::ResponseError for HttpErr {
    fn status_code(&self) -> StatusCode {
        match self {
            HttpErr::Err(_) => StatusCode::INTERNAL_SERVER_ERROR,
            HttpErr::HTTPResponse(r) => r.status(),
        }
    }
    fn error_response(&self) -> HttpResponse<BoxBody> {
        log::error!("Error while processing request! {}", self);

        HttpResponse::InternalServerError().body("Failed to execute request!")
    }
}

impl From<anyhow::Error> for HttpErr {
    fn from(err: anyhow::Error) -> HttpErr {
        HttpErr::Err(err)
    }
}

impl From<serde_json::Error> for HttpErr {
    fn from(value: serde_json::Error) -> Self {
        HttpErr::Err(value.into())
    }
}

impl From<Box<dyn Error>> for HttpErr {
    fn from(value: Box<dyn Error>) -> Self {
        HttpErr::Err(std::io::Error::new(ErrorKind::Other, value.to_string()).into())
    }
}

impl From<std::io::Error> for HttpErr {
    fn from(value: std::io::Error) -> Self {
        HttpErr::Err(value.into())
    }
}

impl From<std::num::ParseIntError> for HttpErr {
    fn from(value: std::num::ParseIntError) -> Self {
        HttpErr::Err(value.into())
    }
}

impl From<reqwest::Error> for HttpErr {
    fn from(value: reqwest::Error) -> Self {
        HttpErr::Err(value.into())
    }
}

impl From<reqwest::header::ToStrError> for HttpErr {
    fn from(value: reqwest::header::ToStrError) -> Self {
        HttpErr::Err(value.into())
    }
}

impl From<actix_web::Error> for HttpErr {
    fn from(value: actix_web::Error) -> Self {
        HttpErr::Err(std::io::Error::new(ErrorKind::Other, value.to_string()).into())
    }
}

impl From<actix::MailboxError> for HttpErr {
    fn from(value: actix::MailboxError) -> Self {
        HttpErr::Err(std::io::Error::new(ErrorKind::Other, value.to_string()).into())
    }
}

impl From<actix_identity::error::GetIdentityError> for HttpErr {
    fn from(value: actix_identity::error::GetIdentityError) -> Self {
        HttpErr::Err(std::io::Error::new(ErrorKind::Other, value.to_string()).into())
    }
}

impl From<actix_identity::error::LoginError> for HttpErr {
    fn from(value: actix_identity::error::LoginError) -> Self {
        HttpErr::Err(std::io::Error::new(ErrorKind::Other, value.to_string()).into())
    }
}

impl From<openssl::error::ErrorStack> for HttpErr {
    fn from(value: openssl::error::ErrorStack) -> Self {
        HttpErr::Err(std::io::Error::new(ErrorKind::Other, value.to_string()).into())
    }
}

impl From<HttpResponse> for HttpErr {
    fn from(value: HttpResponse) -> Self {
        HttpErr::HTTPResponse(value)
    }
}

pub type HttpResult = Result<HttpResponse, HttpErr>;