// DeleteRevision implements a method of kcd.Deleter.
func (db *DB) DeleteRevision(_ context.Context, revision, corpus string) error {
rev := kcd.Revision{Revision: revision, Corpus: corpus}
if err := rev.IsValid(); err != nil {
return err
}
found := false
for i := len(db.Rev) - 1; i >= 0; i-- {
if revisionsEqual(db.Rev[i], rev) {
found = true
db.Rev = append(db.Rev[:i], db.Rev[i+1:]...)
}
}
if found {
return nil
}
return os.ErrNotExist
}
// WriteRevision implements a method of kcd.Writer. This implementation stores
// revisions only in memory, they are not persisted in the indexpack.
func (db *DB) WriteRevision(_ context.Context, rev kcd.Revision, replace bool) error {
if rev.Revision == "" {
return errors.New("missing revision marker")
} else if rev.Corpus == "" {
return errors.New("missing corpus label")
}
if rev.Timestamp.IsZero() {
rev.Timestamp = time.Now()
}
rev.Timestamp = rev.Timestamp.In(time.UTC)
if replace {
for i, old := range db.Revs {
if old.Corpus == rev.Corpus && old.Revision == rev.Revision {
db.Revs[i].Timestamp = rev.Timestamp
return nil
}
}
}
db.Revs = append(db.Revs, rev)
return nil
}