forehead-core 0.1.3

// بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيم
// This file is part of forehead.
//
// Copyright (C) 2026-Present Afsall Inc.
// SPDX-License-Identifier: Apache-2.0 OR MIT
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
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//
// http://www.apache.org/licenses/LICENSE-2.0
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// Alternatively, this file is available under the MIT License:
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use std::fmt;

#[derive(Debug)]
pub enum ForeheadError {
    Io(std::io::Error),
    Parse(String),
    Config(String),
    Template(String),
    Header(String),
}

impl fmt::Display for ForeheadError {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            ForeheadError::Io(e) => write!(f, "I/O error: {e}"),
            ForeheadError::Parse(s) => write!(f, "parse error: {s}"),
            ForeheadError::Config(s) => write!(f, "config error: {s}"),
            ForeheadError::Template(s) => write!(f, "template error: {s}"),
            ForeheadError::Header(s) => write!(f, "header error: {s}"),
        }
    }
}

impl std::error::Error for ForeheadError {
    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
        match self {
            ForeheadError::Io(e) => Some(e),
            _ => None,
        }
    }
}

impl From<std::io::Error> for ForeheadError {
    fn from(e: std::io::Error) -> Self {
        ForeheadError::Io(e)
    }
}