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use std::fmt;
use destream::{en, EncodeMap, Encoder};
pub type TCResult<T> = Result<T, TCError>;
#[derive(Clone, Copy, Eq, PartialEq)]
pub enum ErrorType {
BadGateway,
BadRequest,
Conflict,
Forbidden,
Internal,
MethodNotAllowed,
NotFound,
NotImplemented,
Timeout,
Unauthorized,
Unavailable,
}
impl<'en> en::IntoStream<'en> for ErrorType {
fn into_stream<E: Encoder<'en>>(self, encoder: E) -> Result<E::Ok, E::Error> {
format!(
"/error/{}",
match self {
Self::BadGateway => "bad_gateway",
Self::BadRequest => "bad_request",
Self::Conflict => "conflict",
Self::Forbidden => "forbidden",
Self::Internal => "internal",
Self::MethodNotAllowed => "method_not_allowed",
Self::NotFound => "not_found",
Self::NotImplemented => "not_implemented",
Self::Timeout => "timeout",
Self::Unauthorized => "unauthorized",
Self::Unavailable => "temporarily unavailable",
}
)
.into_stream(encoder)
}
}
impl fmt::Debug for ErrorType {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(self, f)
}
}
impl fmt::Display for ErrorType {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(match self {
Self::BadGateway => "bad gateway",
Self::BadRequest => "bad request",
Self::Conflict => "conflict",
Self::Forbidden => "forbidden",
Self::Internal => "internal error",
Self::MethodNotAllowed => "method not allowed",
Self::NotFound => "not found",
Self::NotImplemented => "not implemented",
Self::Timeout => "request timeout",
Self::Unauthorized => "unauthorized",
Self::Unavailable => "temporarily unavailable",
})
}
}
pub struct TCError {
code: ErrorType,
message: String,
}
impl TCError {
pub fn new(code: ErrorType, message: String) -> Self {
Self { code, message }
}
pub fn bad_gateway<I: fmt::Display>(cause: I) -> Self {
Self {
code: ErrorType::BadGateway,
message: cause.to_string(),
}
}
pub fn bad_request<M: fmt::Display, I: fmt::Display>(message: M, cause: I) -> Self {
Self {
code: ErrorType::BadRequest,
message: format!("{}: {}", message, cause),
}
}
pub fn conflict<M: fmt::Display>(message: M) -> Self {
Self {
code: ErrorType::Conflict,
message: message.to_string(),
}
}
pub fn forbidden<M: fmt::Display, I: fmt::Display>(message: M, id: I) -> Self {
Self {
code: ErrorType::Forbidden,
message: format!("{}: {}", message, id),
}
}
pub fn internal<I: fmt::Display>(info: I) -> Self {
#[cfg(debug_assertions)]
panic!("{}", info);
#[cfg(not(debug_assertions))]
Self {
code: ErrorType::Internal,
message: info.to_string(),
}
}
pub fn method_not_allowed<M: fmt::Display, S: fmt::Display, P: fmt::Display>(
method: M,
subject: S,
path: P,
) -> Self {
Self {
code: ErrorType::MethodNotAllowed,
message: format!("{} endpoint {} does not support {}", subject, path, method),
}
}
pub fn not_found<I: fmt::Display>(locator: I) -> Self {
Self {
code: ErrorType::NotFound,
message: locator.to_string(),
}
}
pub fn not_implemented<F: fmt::Display>(feature: F) -> Self {
Self {
code: ErrorType::NotImplemented,
message: feature.to_string(),
}
}
pub fn timeout<I: fmt::Display>(info: I) -> Self {
Self {
code: ErrorType::Timeout,
message: info.to_string(),
}
}
pub fn unauthorized<I: fmt::Display>(info: I) -> Self {
Self {
code: ErrorType::Unauthorized,
message: format!("invalid credentials: {}", info),
}
}
pub fn unavailable<I: fmt::Display>(info: I) -> Self {
Self {
code: ErrorType::Unavailable,
message: info.to_string(),
}
}
pub fn unsupported<I: fmt::Display>(info: I) -> Self {
Self {
code: ErrorType::BadRequest,
message: info.to_string(),
}
}
pub fn code(&self) -> ErrorType {
self.code
}
pub fn message(&'_ self) -> &'_ str {
&self.message
}
pub fn consume<I: fmt::Display>(self, info: I) -> Self {
Self {
code: self.code,
message: format!("{}: {}", info, self.message),
}
}
}
impl std::error::Error for TCError {}
impl<'en> en::ToStream<'en> for TCError {
fn to_stream<E: Encoder<'en>>(&'en self, encoder: E) -> Result<E::Ok, E::Error> {
let mut map = encoder.encode_map(Some(1))?;
map.encode_entry(self.code, &self.message)?;
map.end()
}
}
impl<'en> en::IntoStream<'en> for TCError {
fn into_stream<E: Encoder<'en>>(self, encoder: E) -> Result<E::Ok, E::Error> {
let mut map = encoder.encode_map(Some(1))?;
map.encode_entry(self.code, self.message)?;
map.end()
}
}
impl fmt::Debug for TCError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(self, f)
}
}
impl fmt::Display for TCError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}: {}", self.code, self.message)
}
}