// ALR - Any Linux Repository
// Copyright (C) 2025 The ALR Authors
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package dl

import (
	"hash"
	"io"
	"os"
	"path/filepath"
)

func HashDir(dirPath string, h hash.Hash) error {
	err := filepath.Walk(dirPath, func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}
		// Skip .git directory
		if info.IsDir() && info.Name() == ".git" {
			return filepath.SkipDir
		}
		// Skip directories (only process files)
		if !info.Mode().IsRegular() {
			return nil
		}
		// Open file
		f, err := os.Open(path)
		if err != nil {
			return err
		}
		defer f.Close()
		// Write file content to hasher
		if _, err := io.Copy(h, f); err != nil {
			return err
		}
		return nil
	})
	if err != nil {
		return err
	}
	return nil
}