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use std::fmt;
use std::io;
use std::error;
use std::string::FromUtf8Error;
use hyper;
use websocket;
use rustc_serialize;
use api;
#[derive(Debug)]
pub enum Error {
Http(hyper::Error),
WebSocket(websocket::result::WebSocketError),
Utf8(FromUtf8Error),
Url(hyper::Error),
JsonDecode(rustc_serialize::json::DecoderError),
JsonParse(rustc_serialize::json::ParserError),
JsonEncode(rustc_serialize::json::EncoderError),
Api(String),
Internal(String),
}
impl From<hyper::Error> for Error {
fn from(err: hyper::Error) -> Error {
match err {
hyper::Error::Uri(_) => Error::Url(err),
_ => Error::Http(err)
}
}
}
impl From<websocket::result::WebSocketError> for Error {
fn from(err: websocket::result::WebSocketError) -> Error {
Error::WebSocket(err)
}
}
impl From<rustc_serialize::json::DecoderError> for Error {
fn from(err: rustc_serialize::json::DecoderError) -> Error {
Error::JsonDecode(err)
}
}
impl From<rustc_serialize::json::ParserError> for Error {
fn from(err: rustc_serialize::json::ParserError) -> Error {
Error::JsonParse(err)
}
}
impl From<rustc_serialize::json::EncoderError> for Error {
fn from(err: rustc_serialize::json::EncoderError) -> Error {
Error::JsonEncode(err)
}
}
impl From<io::Error> for Error {
fn from(err: io::Error) -> Error {
Error::Internal(format!("{:?}", err))
}
}
impl From<FromUtf8Error> for Error {
fn from(err: FromUtf8Error) -> Error {
Error::Utf8(err)
}
}
impl From<api::Error> for Error {
fn from(err: api::Error) -> Error {
Error::Api(format!("{}", err))
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Error::Http(ref e) => write!(f, "Http (hyper) Error: {:?}", e),
Error::WebSocket(ref e) => write!(f, "Websocket Error: {:?}", e),
Error::Utf8(ref e) => write!(f, "Utf8 decode Error: {:?}", e),
Error::Url(ref e) => write!(f, "Url Error: {:?}", e),
Error::JsonDecode(ref e) => write!(f, "Json Decode Error: {:?}", e),
Error::JsonParse(ref e) => write!(f, "Json Parse Error: {:?}", e),
Error::JsonEncode(ref e) => write!(f, "Json Encode Error: {:?}", e),
Error::Api(ref st) => write!(f, "Slack Api Error: {:?}", st),
Error::Internal(ref st) => write!(f, "Internal Error: {:?}", st)
}
}
}
impl error::Error for Error {
fn description(&self) -> &str {
match *self {
Error::Http(ref e) => e.description(),
Error::WebSocket(ref e) => e.description(),
Error::Utf8(ref e) => e.description(),
Error::Url(ref e) => e.description(),
Error::JsonDecode(ref e) => e.description(),
Error::JsonParse(ref e) => e.description(),
Error::JsonEncode(ref e) => e.description(),
Error::Api(ref st) => st,
Error::Internal(ref st) => st
}
}
fn cause(&self) -> Option<&error::Error> {
match *self {
Error::Http(ref e) => Some(e),
Error::WebSocket(ref e) => Some(e),
Error::Utf8(ref e) => Some(e),
Error::Url(ref e) => Some(e),
Error::JsonDecode(ref e) => Some(e),
Error::JsonParse(ref e) => Some(e),
Error::JsonEncode(ref e) => Some(e),
Error::Api(_) => None,
Error::Internal(_) => None
}
}
}