bitbroker 0.0.1-alpha

A language agnostic message broker designed for real-time communication.
Documentation 
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use std::{error, fmt, io};

use base64::DecodeError as Base64DecodeError;
use prost::DecodeError as ProstDecodeError;

use crate::BitBrokerMessage;

#[derive(Debug)]
pub enum Error {
    Io(io::Error),
    DecodeError(Base64DecodeError),
    UnexpectedOperation((u8, u8)),
    BrokerError(&'static str),
    ProstError(ProstDecodeError),
}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::Io(err) => write!(f, "IO error: {err}"),
            Self::DecodeError(err) => write!(f, "Decode error: {err}"),
            Self::UnexpectedOperation((opcode, operand)) => {
                write!(f, "Unexpected operation '{opcode:0X}|{operand:0X}")
            }
            Self::BrokerError(msg) => write!(f, "Broker error: {msg}"),
            Self::ProstError(err) => write!(f, "Proto decode error: {err}"),
        }
    }
}

impl error::Error for Error {
    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
        match self {
            Self::Io(err) => err.source(),
            Self::DecodeError(err) => err.source(),
            _ => None,
        }
    }
}

impl From<io::Error> for Error {
    fn from(value: io::Error) -> Self {
        Self::Io(value)
    }
}

impl From<Base64DecodeError> for Error {
    fn from(value: Base64DecodeError) -> Self {
        Self::DecodeError(value)
    }
}

impl From<ProstDecodeError> for Error {
    fn from(value: ProstDecodeError) -> Self {
        Self::ProstError(value)
    }
}

impl From<BitBrokerMessage> for Error {
    fn from(value: BitBrokerMessage) -> Self {
        let (opcode, operand) = value.codes();
        Self::UnexpectedOperation((*opcode, *operand))
    }
}