roux 2.2.15

Simple and (a)synchronous Reddit API wrapper
Documentation 
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use std::error;
use std::fmt;

use serde_json;

use crate::client;

/// Error type that occurs when an API request fails for some reason.
#[derive(Debug)]
pub enum RouxError {
    /// Occurs when the API has returned a non-success error code.
    Status(client::Response),
    /// Occurs if the HTTP response from Reddit was corrupt and
    /// reqwest could not parse it.
    Network(client::Error),
    /// Occurs if serde could not Deserialize the response.
    Parse(serde_json::Error),
    /// Occurs if there is a grant error.
    Auth(String),
    /// Occurs if [`Reddit::create_client`] is called before [`Reddit::username`] and [`Reddit::password`].
    CredentialsNotSet,
    /// Occurs if endpoint requires OAuth
    OAuthClientRequired,
}

impl From<client::Error> for RouxError {
    fn from(e: client::Error) -> Self {
        RouxError::Network(e)
    }
}

impl From<serde_json::Error> for RouxError {
    fn from(e: serde_json::Error) -> Self {
        RouxError::Parse(e)
    }
}

impl fmt::Display for RouxError {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            RouxError::Status(ref err) => write!(f, "Status error: {}", err.status()),
            RouxError::Network(ref err) => err.fmt(f),
            RouxError::Parse(ref err) => err.fmt(f),
            RouxError::Auth(ref err) => write!(f, "Auth error: {}", err),
            RouxError::CredentialsNotSet => write!(
                f,
                "Must set username and password before calling create_client"
            ),
            RouxError::OAuthClientRequired => {
                write!(f, "Endpoint requires authentication with OAuth")
            }
        }
    }
}

impl error::Error for RouxError {
    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
        match *self {
            RouxError::Status(_) => None,
            RouxError::Auth(_) => None,
            RouxError::Network(ref err) => Some(err),
            RouxError::Parse(ref err) => Some(err),
            RouxError::CredentialsNotSet => None,
            RouxError::OAuthClientRequired => None,
        }
    }
}