waseda_moodle/
error.rs

1use failure::{Backtrace, Context, Fail};
2use std::fmt;
3use std::fmt::Display;
4
5#[derive(Debug, Fail)]
6pub enum ErrorKind {
7    #[fail(display = "invalid response: {:?}", _0)]
8    InvalidResponse(Option<String>),
9    #[fail(display = "network error")]
10    NetworkError,
11}
12
13/* ----------- failure boilerplate ----------- */
14#[derive(Debug)]
15pub struct Error {
16    inner: Context<ErrorKind>,
17}
18
19impl Fail for Error {
20    fn cause(&self) -> Option<&dyn Fail> {
21        self.inner.cause()
22    }
23
24    fn backtrace(&self) -> Option<&Backtrace> {
25        self.inner.backtrace()
26    }
27}
28
29impl Display for Error {
30    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
31        Display::fmt(&self.inner, f)
32    }
33}
34
35impl Error {
36    pub const fn new(inner: Context<ErrorKind>) -> Error {
37        Error { inner }
38    }
39
40    pub fn kind(&self) -> &ErrorKind {
41        self.inner.get_context()
42    }
43}
44
45impl From<ErrorKind> for Error {
46    fn from(kind: ErrorKind) -> Error {
47        Error {
48            inner: Context::new(kind),
49        }
50    }
51}
52
53impl From<Context<ErrorKind>> for Error {
54    fn from(inner: Context<ErrorKind>) -> Error {
55        Error { inner }
56    }
57}
58
59//conversion
60
61impl From<reqwest::Error> for Error {
62    fn from(e: reqwest::Error) -> Self {
63        e.context(ErrorKind::NetworkError).into()
64    }
65}
66impl From<html_extractor::Error> for Error {
67    fn from(e: html_extractor::Error) -> Self {
68        e.context(ErrorKind::InvalidResponse(None)).into()
69    }
70}
waseda_moodle/error.rs

waseda_moodle/
error.rs
