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package trash
import (
"io/ioutil"
"os"
"path/filepath"
"strconv"
"time"
)
// Dir represents a trash directory.
type Dir struct {
path string
}
// New creates a new Trash directory.
func New(root string) (*Dir, error) {
// TODO: We need to check permissions and stuff on creation of a
// new trash. This means we need to check for a sticky bit and a
// bunch of other stuff.
panic("TODO")
}
func (d *Dir) file2path(s string) string {
return filepath.Join(d.path, "files", s)
}
func (d *Dir) info2path(s string) string {
return filepath.Join(d.path, "info", s+".trashinfo")
}
// Files returns a slice of the files in the trash.
func (d *Dir) Files() ([]string, error) {
dir, err := os.Open(filepath.Join(d.path, "files"))
if err != nil {
return nil, err
}
defer dir.Close()
return dir.Readdirnames(0)
}
// Stat returns the Info for the given file in the trash.
func (d *Dir) Stat(s string) (*Info, error) {
f, err := os.Open(d.info2path(s))
if err != nil {
return nil, err
}
defer f.Close()
return NewInfo(f)
}
// Trash moves the file at the given path to the trash.
func (d *Dir) Trash(p string) error {
// Find an open file name.
tname := filepath.Base(p)
for i := 2; d.exists(tname); i++ {
tname = filepath.Base(p) + "." + strconv.Itoa(i)
}
// First, write the trashinfo file.
abs, err := filepath.Abs(p)
if err != nil {
return err
}
info := &Info{abs, time.Now()}
err = ioutil.WriteFile(d.info2path(tname), []byte(info.String()), os.ModePerm)
if err != nil {
return err
}
// Next, move the file to the trash.
return os.Rename(p, d.file2path(tname))
}
// Restore moves the file from the trash to its original location.
func (d *Dir) Restore(s string) error {
info, err := d.Stat(s)
if err != nil {
return err
}
return d.RestoreTo(s, info.Path)
}
// RestoreTo moves the file from the trash to the specified location.
func (d *Dir) RestoreTo(s, p string) error {
_, err := os.Stat(p)
if err == nil {
return os.ErrExist
}
return os.Rename(d.file2path(s), p)
}
func (d *Dir) exists(s string) bool {
_, err := os.Stat(d.file2path(s))
if os.IsNotExist(err) {
return false
}
return true
}
// Erase removes the given file from the trash.
func (d *Dir) Erase(s string) error {
err := os.Remove(d.file2path(s))
if err != nil {
return err
}
err = os.Remove(d.info2path(s))
if err != nil {
return err
}
return nil
}
// EraseAll removes the given file and any children it contains.
func (d *Dir) EraseAll(s string) error {
err := os.RemoveAll(d.file2path(s))
if err != nil {
return err
}
err = os.RemoveAll(d.info2path(s))
if err != nil {
return nil
}
return nil
}
// Empty erases all the files in the trash.
func (d *Dir) Empty() error {
files, err := d.Files()
if err != nil {
return err
}
for _, i := range files {
err = d.EraseAll(i)
if err != nil {
return err
}
}
return nil
}
// IsEmpty returns whether or not the trash is empty.
func (d *Dir) IsEmpty() bool {
files, _ := d.Files()
return len(files) == 0
}
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