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use std::error::Error as StdError;
use std::fmt::{self, Display};
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum ErrorKind {
InvalidUri(String),
ExchangeFailure,
ExchangeError(u16),
Other,
}
#[derive(Debug)]
pub struct Error {
kind: ErrorKind,
source: Option<Box<dyn StdError + Send + Sync>>,
}
impl Error {
pub fn new(kind: ErrorKind) -> Self {
Self { kind, source: None }
}
pub fn new_from<E>(kind: ErrorKind, source: E) -> Self
where
E: Into<Box<dyn StdError + Send + Sync>>,
{
Self {
kind,
source: Some(source.into()),
}
}
pub fn kind(&self) -> &ErrorKind {
&self.kind
}
}
impl Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match &self.kind {
ErrorKind::InvalidUri(uri) => write!(f, "invalid URI: '{}'", uri)?,
ErrorKind::ExchangeFailure => write!(f, "failed to exchange token")?,
ErrorKind::ExchangeError(code) => write!(
f,
"token exchange returned non-success status code: {}",
code
)?,
ErrorKind::Other => write!(f, "an unknown error occurred")?,
}
if let Some(error) = &self.source {
write!(f, ": {}", error)?;
}
Ok(())
}
}
impl StdError for Error {
fn source(&self) -> Option<&(dyn StdError + 'static)> {
self.source.as_ref().map(|e| &**e as _)
}
}