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/*
GoToSocial
Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package media
import (
"context"
"errors"
"fmt"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/superseriousbusiness/gotosocial/internal/regexes"
"github.com/superseriousbusiness/gotosocial/internal/uris"
)
func (m *manager) PruneOrphaned(ctx context.Context, dry bool) (int, error) {
var totalPruned int
// keys in storage will look like the following:
// `[ACCOUNT_ID]/[MEDIA_TYPE]/[MEDIA_SIZE]/[MEDIA_ID].[EXTENSION]`
// we can filter out keys we're not interested in by
// matching through a regex
var matchCount int
match := func(storageKey string) bool {
if regexes.FilePath.MatchString(storageKey) {
matchCount++
return true
}
return false
}
log.Info("checking storage keys for orphaned pruning candidates...")
iterator, err := m.storage.Iterator(ctx, match)
if err != nil {
return 0, fmt.Errorf("PruneOrphaned: error getting storage iterator: %w", err)
}
// make sure we have some keys, and also advance
// the iterator to the first non-empty key
if !iterator.Next() {
return 0, nil
}
instanceAccount, err := m.db.GetInstanceAccount(ctx, "")
if err != nil {
return 0, fmt.Errorf("PruneOrphaned: error getting instance account: %w", err)
}
instanceAccountID := instanceAccount.ID
// for each key in the iterator, check if entry is orphaned
log.Info("got %d orphaned pruning candidates, checking for orphaned status, please wait...")
var checkedKeys int
orphanedKeys := make([]string, 0, matchCount)
for key := iterator.Key(); iterator.Next(); key = iterator.Key() {
if m.orphaned(ctx, key, instanceAccountID) {
orphanedKeys = append(orphanedKeys, key)
}
checkedKeys++
if checkedKeys%50 == 0 {
log.Infof("checked %d of %d orphaned pruning candidates...", checkedKeys, matchCount)
}
}
iterator.Release()
if !dry {
// the real deal, we have to delete stuff
for _, key := range orphanedKeys {
log.Infof("key %s corresponds to orphaned media, will remove it now", key)
if err := m.storage.Delete(ctx, key); err != nil {
log.Errorf("error deleting item with key %s from storage: %s", key, err)
continue
}
totalPruned++
}
} else {
// just a dry run, don't delete anything
for _, key := range orphanedKeys {
log.Infof("DRY RUN: key %s corresponds to orphaned media which would be deleted", key)
totalPruned++
}
}
return totalPruned, nil
}
func (m *manager) orphaned(ctx context.Context, key string, instanceAccountID string) bool {
pathParts := regexes.FilePath.FindStringSubmatch(key)
if len(pathParts) != 6 {
return false
}
mediaType := pathParts[2]
mediaID := pathParts[4]
var orphaned bool
switch Type(mediaType) {
case TypeAttachment, TypeHeader, TypeAvatar:
if _, err := m.db.GetAttachmentByID(ctx, mediaID); err != nil {
if errors.Is(err, db.ErrNoEntries) {
orphaned = true
} else {
log.Errorf("orphaned: error calling GetAttachmentByID: %s", err)
}
}
case TypeEmoji:
// look using the static URL for the emoji, since the MEDIA_ID part of
// the key for emojis will not necessarily correspond to the file that's
// currently being used as the emoji image
staticURI := uris.GenerateURIForAttachment(instanceAccountID, string(TypeEmoji), string(SizeStatic), mediaID, mimePng)
if _, err := m.db.GetEmojiByStaticURL(ctx, staticURI); err != nil {
if errors.Is(err, db.ErrNoEntries) {
orphaned = true
} else {
log.Errorf("orphaned: error calling GetEmojiByID: %s", err)
}
}
default:
orphaned = true
}
return orphaned
}
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