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generate random names until one fits

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This commit is contained in:
Lilian Jónsdóttir 2024-06-20 22:43:21 -07:00
parent 5c4ce9a732
commit 7fdb8052c4
1 changed files with 30 additions and 22 deletions
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52
internal/trash/trash.go
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@ -12,6 +12,7 @@ import (
"git.burning.moe/celediel/gt/internal/filter"
"github.com/charmbracelet/log"
"github.com/dustin/go-humanize"
"gitlab.com/tymonx/go-formatter/formatter"
"gopkg.in/ini.v1"
)
@ -144,28 +145,7 @@ func Remove(files []Info) (removed int, err error) {
}
func TrashFile(trashDir, name string) error {
var (
outdir = filepath.Join(trashDir, "files")
trashout = filepath.Join(trashDir, "info")
filename = filepath.Base(name)
rando = random_filename(random_str_length)
)
trashinfo_filename := filepath.Join(trashout, filename+trash_info_ext)
out_path := filepath.Join(outdir, filename)
// check for file collision
// TODO: make sure randomly generated name doesn't exist
if _, e := os.Stat(trashinfo_filename); e == nil {
new_name := filepath.Join(trashout, filename+rando+trash_info_ext)
log.Warnf("trashinfo %s exists, using randomized %s", trashinfo_filename, new_name)
trashinfo_filename = new_name
}
if _, e := os.Stat(out_path); e == nil {
new_name := filepath.Join(outdir, filename+rando)
log.Warnf("trashed file %s exists, using randomized %s", out_path, new_name)
out_path = new_name
}
trashinfo_filename, out_path := ensureUniqueName(filepath.Base(name), trashDir)
// TODO: write across filesystems
if err := os.Rename(name, out_path); err != nil {
@ -248,3 +228,31 @@ func randomChar() byte {
const chars string = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890"
return chars[rand.Intn(len(chars))]
}
func ensureUniqueName(filename, trashDir string) (string, string) {
var (
filedir = filepath.Join(trashDir, "files")
infodir = filepath.Join(trashDir, "info")
)
info := filepath.Join(infodir, filename+trash_info_ext)
if _, err := os.Stat(info); os.IsNotExist(err) {
// doesn't exist, so use it
path := filepath.Join(filedir, filename)
return info, path
} else {
// otherwise, try random suffixes until one works
log.Debugf("%s exists in trash, generating random name", filename)
var tries int
for {
tries++
rando := random_filename(random_str_length)
new_name := filepath.Join(infodir, filename+rando+trash_info_ext)
if _, err := os.Stat(new_name); os.IsNotExist(err) {
path := filepath.Join(filedir, filename+rando)
log.Debugf("settled on random name %s%s on the %s try", filename, rando, humanize.Ordinal(tries))
return new_name, path
}
}
}
}