package zipper

import (
	"os"
	"strings"
)

func PrependPath(filename, path string) string {
	if len(path) == 0 {
		return strings.ReplaceAll(strings.ReplaceAll(filename, "\\", "/"), "//", "/")
	}
	return strings.ReplaceAll(strings.ReplaceAll(path+"/"+filename, "\\", "/"), "//", "/")
}

// MakeSurePathExists creates all missing parent directories, given a specific file path.
func MakeSurePathExists(filepath string, perm os.FileMode) error {
	i := len(filepath)
	for i > 0 && !os.IsPathSeparator(filepath[i-1]) { // Scan backward over element.
		i--
	}

	var err error
	if i > 1 {
		// Create parent.
		err = os.MkdirAll(filepath[:i-1], perm)
	}
	return err
}