hiddenFileSystem.go

/*
	WebChunk, web server for block game maps
	Copyright (C) 2022 Maxim Zhuchkov

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero 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 Affero General Public License for more details.

	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.

	Contact me via mail: q3.max.2011@yandex.ru or Discord: MaX#6717
*/

package main

import (
	"net/http"
	"path/filepath"
)

type hiddenFileSystem struct {
	fs http.FileSystem
}

func (nfs hiddenFileSystem) Open(path string) (http.File, error) {
	f, err := nfs.fs.Open(path)
	if err != nil {
		return nil, err
	}

	s, err := f.Stat()
	if err != nil {
		return nil, err
	}
	if s.IsDir() {
		index := filepath.Join(path, "index.html")
		if _, err := nfs.fs.Open(index); err != nil {
			closeErr := f.Close()
			if closeErr != nil {
				return nil, closeErr
			}

			return nil, err
		}
	}

	return f, nil
}