twitter_client/
error.rs

1use std::error;
2use std::fmt::{self, Display, Formatter};
3
4use http::StatusCode;
5use serde::Deserialize;
6
7#[derive(Debug)]
8pub enum Error<SE, BE> {
9    Deserializing(serde_json::Error),
10    Service(SE),
11    Body(BE),
12    Twitter(TwitterErrors),
13    Unexpected,
14}
15
16#[derive(Debug)]
17pub struct TwitterErrors {
18    pub status: StatusCode,
19    pub errors: Vec<ErrorCode>,
20    pub rate_limit: Option<crate::RateLimit>,
21}
22
23#[derive(Debug, Deserialize)]
24pub struct ErrorCode {
25    pub code: u32,
26    pub message: String,
27}
28
29impl<SE: error::Error + 'static, BE: error::Error + 'static> error::Error for Error<SE, BE> {
30    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
31        match *self {
32            Error::Deserializing(ref e) => Some(e),
33            Error::Service(ref e) => Some(e),
34            Error::Body(ref e) => Some(e),
35            Error::Twitter(ref e) => Some(e),
36            Error::Unexpected => None,
37        }
38    }
39}
40
41impl<SE: Display, BE: Display> Display for Error<SE, BE> {
42    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
43        match *self {
44            Error::Deserializing(_) => f.write_str("Failed to deserialize the response body."),
45            Error::Service(_) => f.write_str("HTTP error"),
46            Error::Body(_) => f.write_str("Error while reading the response body"),
47            Error::Twitter(_) => f.write_str("Twitter returned error(s)"),
48            Error::Unexpected => f.write_str("Unexpected error occured."),
49        }
50    }
51}
52
53impl TwitterErrors {
54    pub fn codes(&self) -> impl Iterator<Item = u32> + '_ {
55        self.errors.iter().map(|e| e.code)
56    }
57}
58
59impl Display for TwitterErrors {
60    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
61        write!(f, "status: {}", self.status)?;
62
63        let mut errors = self.errors.iter();
64        if let Some(e) = errors.next() {
65            write!(f, "; errors: {}", e)?;
66            for e in errors {
67                write!(f, ", {}", e)?;
68            }
69        }
70
71        Ok(())
72    }
73}
74
75impl error::Error for TwitterErrors {}
76
77impl ErrorCode {
78    pub const YOU_ARENT_ALLOWED_TO_ADD_MEMBERS_TO_THIS_LIST: u32 = 104;
79    pub const CANNOT_FIND_SPECIFIED_USER: u32 = 108;
80    pub const NO_STATUS_FOUND_WITH_THAT_ID: u32 = 144;
81    pub const YOU_HAVE_ALREADY_RETWEETED_THIS_TWEET: u32 = 327;
82}
83
84impl Display for ErrorCode {
85    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
86        write!(f, "{} {}", self.code, self.message)
87    }
88}
twitter_client/error.rs

twitter_client/
error.rs
