49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
package database
|
|
|
|
import (
|
|
"database/sql"
|
|
"fmt"
|
|
)
|
|
|
|
func (db *DB) DeleteState(name string) error {
|
|
_, err := db.Exec(`DELETE FROM states WHERE name = ?;`, name)
|
|
return err
|
|
}
|
|
|
|
func (db *DB) GetState(name string) ([]byte, error) {
|
|
var encryptedData []byte
|
|
err := db.QueryRow(`SELECT data FROM states WHERE name = ?;`, name).Scan(&encryptedData)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return db.dataEncryptionKey.DecryptAES256(encryptedData)
|
|
}
|
|
|
|
// returns true in case of id mismatch
|
|
func (db *DB) SetState(name string, data []byte, id string) (bool, error) {
|
|
encryptedData, err := db.dataEncryptionKey.EncryptAES256(data)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
if id == "" {
|
|
_, err = db.Exec(
|
|
`INSERT INTO states(name, data) VALUES (:name, :data) ON CONFLICT DO UPDATE SET data = :data WHERE name = :name;`,
|
|
sql.Named("data", encryptedData),
|
|
sql.Named("name", name),
|
|
)
|
|
return false, err
|
|
} else {
|
|
result, err := db.Exec(`UPDATE states SET data = ? WHERE name = ? and lock->>'ID' = ?;`, encryptedData, name, id)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
n, err := result.RowsAffected()
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
if n != 1 {
|
|
return true, fmt.Errorf("failed to update state, lock ID does not match")
|
|
}
|
|
return false, nil
|
|
}
|
|
}
|