lssg_lib/
parse_error.rs

1use std::{
2    error, fmt,
3    io::{self},
4    num::TryFromIntError,
5    string,
6};
7
8#[derive(Debug, PartialEq, Eq)]
9pub enum ParseErrorKind {
10    Io,
11    EndOfFile,
12    InvalidInput,
13    Unsupported,
14}
15
16#[derive(Debug)]
17pub struct ParseError {
18    pub kind: ParseErrorKind,
19    pub message: String,
20    pub context: String,
21}
22
23impl ParseError {
24    pub fn new<S: Into<String>>(message: S, kind: ParseErrorKind) -> ParseError {
25        ParseError {
26            message: message.into(),
27            kind,
28            context: String::new(),
29        }
30    }
31
32    pub fn invalid<S: Into<String>>(message: S) -> ParseError {
33        Self::new(message, ParseErrorKind::InvalidInput)
34    }
35
36    pub fn unsupported<S: Into<String>>(message: S) -> ParseError {
37        Self::new(message, ParseErrorKind::Unsupported)
38    }
39
40    pub fn eof<S: Into<String>>(message: S) -> ParseError {
41        Self::new(message, ParseErrorKind::EndOfFile)
42    }
43}
44
45impl error::Error for ParseError {}
46impl fmt::Display for ParseError {
47    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
48        write!(
49            f,
50            "Error while parsing remarkable file {}. {}",
51            self.message,
52            format!("\n{}", self.context)
53        )
54    }
55}
56impl From<io::Error> for ParseError {
57    fn from(error: io::Error) -> Self {
58        match error.kind() {
59            io::ErrorKind::UnexpectedEof => Self::eof(error.to_string()),
60            _ => Self::new(format!("Failed to read input: {error}"), ParseErrorKind::Io),
61        }
62    }
63}
64impl From<TryFromIntError> for ParseError {
65    fn from(error: TryFromIntError) -> Self {
66        Self::new(
67            format!("Failed to read input: {error}"),
68            ParseErrorKind::InvalidInput,
69        )
70    }
71}
72impl From<string::FromUtf8Error> for ParseError {
73    fn from(value: string::FromUtf8Error) -> Self {
74        Self::invalid(format!("Invalid utf-8 string found: '{value}'"))
75    }
76}
lssg_lib/parse_error.rs

lssg_lib/
parse_error.rs
