package storer
import (
"bytes"
"encoding/gob"
"time"
"github.com/dgraph-io/badger"
"github.com/neonxp/sendsafe/internal/encryption"
"github.com/rs/xid"
)
type Store struct {
db *badger.DB
}
func New(dbFile string) (*Store, error) {
db, err := badger.Open(badger.DefaultOptions(dbFile))
if err != nil {
return nil, err
}
return &Store{
db: db,
}, nil
}
func (s *Store) Save(text string, pin string, ttl int) (string, error) {
var err error
encrypted := false
if pin != "" {
text, err = encryption.Encrypt([]byte(pin), text)
if err != nil {
return "", err
}
encrypted = true
}
record := memo{
Text: text,
Encrypted: encrypted,
}
buf := bytes.NewBuffer([]byte{})
if err := gob.NewEncoder(buf).Encode(record); err != nil {
return "", err
}
id := xid.New()
err = s.db.Update(func(txn *badger.Txn) error {
return txn.SetEntry(&badger.Entry{
Key: id.Bytes(),
Value: buf.Bytes(),
ExpiresAt: uint64(time.Now().Add(time.Duration(ttl) * time.Minute).Unix()),
})
})
return id.String(), err
}
func (s *Store) IsEncrypted(id string) (bool, error) {
var encrypted bool
return encrypted, s.db.View(func(txn *badger.Txn) error {
uid, err := xid.FromString(id)
if err != nil {
return err
}
value, err := txn.Get(uid.Bytes())
if err != nil {
return err
}
record := new(memo)
return value.Value(func(val []byte) error {
if err := gob.NewDecoder(bytes.NewBuffer(val)).Decode(record); err != nil {
return err
}
encrypted = record.Encrypted
return nil
})
})
}
func (s *Store) Get(id string, pin string) (string, error) {
var text string
return text, s.db.Update(func(txn *badger.Txn) error {
uid, err := xid.FromString(id)
if err != nil {
return err
}
value, err := txn.Get(uid.Bytes())
if err != nil {
return err
}
record := new(memo)
err = value.Value(func(val []byte) error {
if err := gob.NewDecoder(bytes.NewBuffer(val)).Decode(record); err != nil {
return err
}
return nil
})
if err != nil {
return err
}
text = record.Text
if record.Encrypted {
text, err = encryption.Decrypt([]byte(pin), text)
if err != nil {
return err
}
}
return txn.Delete(uid.Bytes())
})
}
func init() {
gob.Register(memo{})
}
type memo struct {
Text string
Encrypted bool
}
