1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146

//! Error components for the library.
// Much thanks to Andrew Gallant for the basis of this part of the library... followed the following
// code for this: https://github.com/BurntSushi/imdb-rename/blob/master/imdb-index/src/error.rs.

use std::fmt;
use std::result;
use failure::{Backtrace, Context, Fail};

/// A type alias for handling errors related to rustnao.
pub type Result<T> = result::Result<T, Error>;

/// An error that can occur while interacting to the SauceNAO API.
#[derive(Debug)]
pub struct Error {
	context : Context<ErrType>,
}

impl Error {
	/// Return the kind of error
	pub fn kind(&self) -> &ErrType {
		self.context.get_context()
	}

	pub(crate) fn invalid_url<T: AsRef<str>>(unk: T) -> Error {
		Error::from(ErrType::InvalidURL(unk.as_ref().to_string()))
	}

	pub(crate) fn invalid_path<T: AsRef<str>>(unk: T) -> Error {
		Error::from(ErrType::InvalidFile(unk.as_ref().to_string()))
	}

	pub(crate) fn invalid_serde<T: AsRef<str>>(unk: T) -> Error {
		Error::from(ErrType::InvalidSerde(unk.as_ref().to_string()))
	}

	pub(crate) fn invalid_code(code : i32, message : String) -> Error {
		Error::from(ErrType::InvalidCode{code, message})
	}

	pub(crate) fn invalid_request<T: AsRef<str>>(unk: T) -> Error {
		Error::from(ErrType::InvalidRequest(unk.as_ref().to_string()))
	}

	pub(crate) fn invalid_parameter(message : String) -> Error {
		Error::from(ErrType::InvalidParameters(message))
	}
}

impl Fail for Error {
	fn cause(&self) -> Option<&Fail> {
		self.context.cause()
	}

	fn backtrace(&self) -> Option<&Backtrace> {
		self.context.backtrace()
	}
}

impl fmt::Display for Error {
	fn fmt(&self, f : &mut fmt::Formatter) -> fmt::Result {
		self.context.fmt(f)
	}
}

/// The specific type of error that can occur.
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum ErrType {
	/// An error when forming the URL for the API.  
	/// 
	/// The data provided is the error found.
	InvalidURL(String),
	/// An error when getting the file path of a file for the API.  
	/// 
	/// The data provided is the error found.
	InvalidFile(String),
	/// An error when trying to deserialize the resulting JSON from the API
	/// 
	/// The data provided is the error found.
	InvalidSerde(String),
	/// An error when receiving an unsuccessful code from the SauceNAO API.
	/// 
	/// The data provided is the error code and message.
	InvalidCode {
		/// The error code from SauceNAO
		code : i32, 
		/// The message showing the cause of the error from SauceNAO
		message : String,
	},
	/// An error when trying to send an invalid request to the API.
	/// 
	/// The data provided is the error code and message.
	InvalidRequest(String),
	/// An error with some data that is passed in by the user.
	/// 
	/// The data provided is an error message.
	InvalidParameters(String),
}

impl fmt::Display for ErrType {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		match self {
			ErrType::InvalidURL(ref unk) => write!(f, "ERROR: URL was invalid, error was due to: {}", unk),
			ErrType::InvalidFile(ref unk) => write!(f, "ERROR: File path was invalid, error was due to: {}", unk),
			ErrType::InvalidSerde(ref unk) => write!(f, "ERROR: Could not properly serde results: {}", unk),
			ErrType::InvalidCode {code, message} => write!(f, "ERROR: Recieved an invalid status code {} after API call with message: \"{}\"", code, message),
			ErrType::InvalidRequest(ref unk) => write!(f, "ERROR: Failed to make the request, error was due to: {}", unk),
			ErrType::InvalidParameters(message) => write!(f, "ERROR: An invalid parameter was passed, error was due to: {}", message),
		}
	}
}

impl From<ErrType> for Error {
    fn from(err_type: ErrType) -> Error {
        Error::from(Context::new(err_type))
    }
}

impl From<Context<ErrType>> for Error {
    fn from(context: Context<ErrType>) -> Error {
        Error { context }
    }
}

impl From<serde_json::Error> for Error {
	fn from(err : serde_json::Error) -> Self {
		Error::invalid_serde(err.to_string())
	}
}

impl From<reqwest::Error> for Error {
	fn from(err : reqwest::Error) -> Self {
		Error::invalid_request(err.to_string())
	}
}

impl From<reqwest::UrlError> for Error {
	fn from(err : reqwest::UrlError) -> Self {
		Error::invalid_url(err.to_string())
	}
}

impl From<std::io::Error> for Error {
	fn from(err : std::io::Error) -> Self {
		Error::invalid_path(err.to_string())
	}
}