2024-09-30 00:58:49 +02:00
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package database
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import (
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"database/sql"
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2024-10-03 00:13:09 +02:00
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"fmt"
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2024-09-30 00:58:49 +02:00
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)
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2024-10-05 09:54:35 +02:00
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// returns true in case of successful deletion
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func (db *DB) DeleteState(name string) (bool, error) {
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result, err := db.Exec(`DELETE FROM states WHERE name = ?;`, name)
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if err != nil {
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return false, err
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}
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n, err := result.RowsAffected()
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if err != nil {
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return false, err
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}
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return n == 1, nil
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2024-10-02 08:26:53 +02:00
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}
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2024-09-30 00:58:49 +02:00
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func (db *DB) GetState(name string) ([]byte, error) {
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var encryptedData []byte
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err := db.QueryRow(`SELECT data FROM states WHERE name = ?;`, name).Scan(&encryptedData)
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if err != nil {
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return nil, err
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}
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2024-10-06 00:13:53 +02:00
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if encryptedData == nil {
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return []byte{}, nil
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}
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2024-09-30 00:58:49 +02:00
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return db.dataEncryptionKey.DecryptAES256(encryptedData)
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}
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2024-10-03 00:13:09 +02:00
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// returns true in case of id mismatch
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func (db *DB) SetState(name string, data []byte, id string) (bool, error) {
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2024-09-30 00:58:49 +02:00
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encryptedData, err := db.dataEncryptionKey.EncryptAES256(data)
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if err != nil {
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2024-10-03 00:13:09 +02:00
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return false, err
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2024-09-30 00:58:49 +02:00
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}
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2024-10-03 00:13:09 +02:00
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if id == "" {
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_, err = db.Exec(
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`INSERT INTO states(name, data) VALUES (:name, :data) ON CONFLICT DO UPDATE SET data = :data WHERE name = :name;`,
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sql.Named("data", encryptedData),
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sql.Named("name", name),
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)
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return false, err
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} else {
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result, err := db.Exec(`UPDATE states SET data = ? WHERE name = ? and lock->>'ID' = ?;`, encryptedData, name, id)
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if err != nil {
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return false, err
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}
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n, err := result.RowsAffected()
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if err != nil {
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return false, err
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}
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if n != 1 {
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return true, fmt.Errorf("failed to update state, lock ID does not match")
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}
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return false, nil
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2024-09-30 00:58:49 +02:00
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}
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}
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