/*
 * Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
 * Author: Alex Yatskov <alex@foosoft.net>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package goldsmith

import (
	"os"
	"path/filepath"
)

type fileInfo struct {
	os.FileInfo
	path string
}

func cleanPath(path string) string {
	if filepath.IsAbs(path) {
		var err error
		if path, err = filepath.Rel("/", path); err != nil {
			panic(err)
		}
	}

	return filepath.Clean(path)
}

func scanDir(root string, infos chan fileInfo) {
	defer close(infos)

	filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}

		infos <- fileInfo{FileInfo: info, path: path}
		return nil
	})
}

func fileCached(srcPath, dstPath string) bool {
	srcStat, err := os.Stat(srcPath)
	if err != nil {
		return false
	}

	dstStat, err := os.Stat(dstPath)
	if err != nil {
		return false
	}

	return dstStat.ModTime().Unix() >= srcStat.ModTime().Unix()
}