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use std::fmt;

/// Error definitions to use across the library.
#[derive(Debug, PartialEq)]
pub enum Error {
    /// Errors that occur when a config is deemed as invalid.
    ConfigError(String),
    /// Errors that occur during I/O operations.
    IoError(String),
    /// Errors that occur while parsing of structures failes.
    ParseError(String),
    /// Errors that occur while manipulating paths.
    PathError(String),
    /// Errors that occur while rendering templates.
    RenderingError(String),
    /// Errors that occur during syncing.
    SyncingError(String),
    /// Errors that occur while registering templates
    TemplatingError(String),
}

/// `Result` type to use across the library.
pub type Result<T> = std::result::Result<T, Error>;

impl std::error::Error for Error {}

impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            Error::ConfigError(ref msg) => {
                write!(f, "Config Error: {}", msg)
            }
            Error::IoError(ref msg) => {
                write!(f, "IO Error: {}", msg)
            }
            Error::ParseError(ref msg) => {
                write!(f, "Parse Error: {}", msg)
            }
            Error::PathError(ref msg) => {
                write!(f, "Path Error: {}", msg)
            }
            Error::RenderingError(ref msg) => {
                write!(f, "Rendering Error: {}", msg)
            }
            Error::SyncingError(ref msg) => {
                write!(f, "Syncing Error: {}", msg)
            }
            Error::TemplatingError(ref msg) => {
                write!(f, "Templating Error: {}", msg)
            }
        }
    }
}

impl From<std::io::Error> for Error {
    fn from(err: std::io::Error) -> Self {
        Error::IoError(err.to_string())
    }
}
impl From<toml::de::Error> for Error {
    fn from(err: toml::de::Error) -> Self {
        Self::ParseError(err.to_string())
    }
}
impl From<std::path::StripPrefixError> for Error {
    fn from(err: std::path::StripPrefixError) -> Self {
        Self::PathError(err.to_string())
    }
}
impl From<glob::PatternError> for Error {
    fn from(err: glob::PatternError) -> Self {
        Self::PathError(err.to_string())
    }
}
impl From<handlebars::RenderError> for Error {
    fn from(err: handlebars::RenderError) -> Self {
        Self::RenderingError(err.to_string())
    }
}
impl From<std::str::Utf8Error> for Error {
    fn from(err: std::str::Utf8Error) -> Self {
        Self::RenderingError(err.to_string())
    }
}
impl From<handlebars::TemplateError> for Error {
    fn from(err: handlebars::TemplateError) -> Self {
        Self::TemplatingError(err.to_string())
    }
}

// Author: Blurgy <gy@blurgy.xyz>
// Date:   Oct 29 2021, 23:07 [CST]