package swampfile

import (
	"io"
	"path"
	"path/filepath"
	"strings"
	"time"
)

type SwampOutFile interface {
	Path() string
	Size() int64
	Modified() time.Time
	io.Reader
	io.Seeker
	io.Closer
}

type SwampInFile interface {
	Path() string
	Size() int64
	Modified() time.Time
	io.Writer
	io.Seeker
	io.Closer
}

type FileReference struct {
	Path      string
	UserAgent string
}

type DeletedSwampFile struct {
	Path string
	Size int64
}

func (fr *FileReference) Clean(strict bool) (*FileReference, error) {
	c := filepath.FromSlash(path.Clean("/" + strings.Trim(fr.Path, "/")))

	if c != fr.Path && strict {
		return nil, ErrUnacceptablePath
	}

	n := FileReference {
		c,
		fr.UserAgent,
	}

	return &n, nil
}