| 1 | package draftstate |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "database/sql" |
| 6 | "errors" |
| 7 | "fmt" |
| 8 | "net/url" |
| 9 | "os" |
| 10 | "path/filepath" |
| 11 | "runtime" |
| 12 | "strings" |
| 13 | "sync" |
| 14 | "time" |
| 15 | |
| 16 | sqlite "modernc.org/sqlite" |
| 17 | ) |
| 18 | |
| 19 | const SchemaVersion = 4 |
| 20 | const SnapshotVersion = 5 |
| 21 | |
| 22 | var ( |
| 23 | ErrConflict = errors.New("session draft revision conflict") |
| 24 | ErrNotFound = errors.New("session draft not found") |
| 25 | ErrConverted = errors.New("session draft was converted") |
| 26 | ErrOperationConflict = errors.New("session draft submission conflicts with the active operation") |
| 27 | ErrOperationNotFound = errors.New("session draft submission not found") |
| 28 | ErrUnsupportedVersion = errors.New("session draft schema version is unsupported") |
| 29 | ) |
| 30 | |
| 31 | type Draft struct { |
| 32 | ID string |
| 33 | WorkspaceID string |
| 34 | Scope string |
| 35 | WorkspaceRoot string |
| 36 | Revision uint64 |
| 37 | ContentJSON string |
| 38 | SettingsJSON string |
| 39 | Status string |
| 40 | UpdatedAt time.Time |
| 41 | } |
| 42 | |
| 43 | type Operation struct { |
| 44 | RequestID string |
| 45 | SourceDigest string |
| 46 | Revision uint64 |
| 47 | ExecutionJSON string |
| 48 | ID string |
| 49 | DraftID string |
| 50 | WorkspaceID string |
| 51 | DraftRevision uint64 |
| 52 | SessionID string |
| 53 | TopicID string |
| 54 | SubmissionID string |
| 55 | Fingerprint string |
| 56 | RequestJSON string |
| 57 | Phase string |
| 58 | Error string |
| 59 | CreatedAt time.Time |
| 60 | UpdatedAt time.Time |
| 61 | } |
| 62 | |
| 63 | type Store struct { |
| 64 | path string |
| 65 | mu sync.Mutex |
| 66 | db *sql.DB |
| 67 | } |
| 68 | |
| 69 | func New(path string) *Store { return &Store{path: filepath.Clean(path)} } |
| 70 | |
| 71 | func (s *Store) Path() string { |
| 72 | if s == nil || s.path == "." { |
| 73 | return "" |
| 74 | } |
| 75 | return s.path |
| 76 | } |
| 77 | |
| 78 | func (s *Store) Close() error { |
| 79 | if s == nil { |
| 80 | return nil |
| 81 | } |
| 82 | s.mu.Lock() |
| 83 | defer s.mu.Unlock() |
| 84 | if s.db == nil { |
| 85 | return nil |
| 86 | } |
| 87 | err := s.db.Close() |
| 88 | s.db = nil |
| 89 | return err |
| 90 | } |
| 91 | |
| 92 | func (s *Store) openLocked() error { |
| 93 | if s.db != nil { |
| 94 | return nil |
| 95 | } |
| 96 | if s == nil || s.path == "" || s.path == "." { |
| 97 | return errors.New("session draft database path is unavailable") |
| 98 | } |
| 99 | if err := os.MkdirAll(filepath.Dir(s.path), 0o700); err != nil { |
| 100 | return err |
| 101 | } |
| 102 | db, err := sql.Open("sqlite", draftFileDSN(s.path)) |
| 103 | if err != nil { |
| 104 | return err |
| 105 | } |
| 106 | db.SetMaxOpenConns(1) |
| 107 | var version int |
| 108 | if err = db.QueryRow(`PRAGMA user_version`).Scan(&version); err != nil { |
| 109 | _ = db.Close() |
| 110 | return err |
| 111 | } |
| 112 | if version < 0 || version > SchemaVersion { |
| 113 | _ = db.Close() |
| 114 | return fmt.Errorf("%w: %d", ErrUnsupportedVersion, version) |
| 115 | } |
| 116 | if version == 0 { |
| 117 | var tables int |
| 118 | if err = db.QueryRow(`SELECT count(*) FROM sqlite_master WHERE type='table' AND name NOT LIKE 'sqlite_%'`).Scan(&tables); err != nil { |
| 119 | _ = db.Close() |
| 120 | return err |
| 121 | } |
| 122 | if tables != 0 { |
| 123 | // A concurrent first opener may have committed the schema after our |
| 124 | // first read. Only an identifiable committed format may be opened. |
| 125 | if err = db.QueryRow(`PRAGMA user_version`).Scan(&version); err != nil { |
| 126 | _ = db.Close() |
| 127 | return err |
| 128 | } |
| 129 | if version < 1 || version > SchemaVersion { |
| 130 | _ = db.Close() |
| 131 | return fmt.Errorf("%w: %d", ErrUnsupportedVersion, version) |
| 132 | } |
| 133 | } |
| 134 | } |
| 135 | if version > 0 && version < SchemaVersion { |
| 136 | if err := backupBeforeUpgrade(db, s.path, version); err != nil { |
| 137 | _ = db.Close() |
| 138 | return err |
| 139 | } |
| 140 | } |
| 141 | // Even changing journal mode writes the database header. Check the version |
| 142 | // first so an older binary leaves an unknown future file byte-for-byte intact. |
| 143 | for _, statement := range []string{ |
| 144 | `PRAGMA busy_timeout = 5000`, |
| 145 | `PRAGMA journal_mode = WAL`, |
| 146 | `PRAGMA foreign_keys = ON`, |
| 147 | } { |
| 148 | if _, err = db.Exec(statement); err != nil { |
| 149 | _ = db.Close() |
| 150 | return err |
| 151 | } |
| 152 | } |
| 153 | if version == 0 { |
| 154 | if err = initialize(db); err != nil { |
| 155 | _ = db.Close() |
| 156 | return err |
| 157 | } |
| 158 | } else { |
| 159 | if version == 1 { |
| 160 | if err = migrateV1ToV2(db); err != nil { |
| 161 | _ = db.Close() |
| 162 | return err |
| 163 | } |
| 164 | version = 2 |
| 165 | } |
| 166 | if version == 2 { |
| 167 | if err = migrateV2ToV3(db); err != nil { |
| 168 | _ = db.Close() |
| 169 | return err |
| 170 | } |
| 171 | version = 3 |
| 172 | } |
| 173 | if version == 3 { |
| 174 | if err = migrateV3ToV4(db); err != nil { |
| 175 | _ = db.Close() |
| 176 | return err |
| 177 | } |
| 178 | } |
| 179 | } |
| 180 | s.db = db |
| 181 | return nil |
| 182 | } |
| 183 | |
| 184 | func initialize(db *sql.DB) error { |
| 185 | tx, err := db.Begin() |
| 186 | if err != nil { |
| 187 | return err |
| 188 | } |
| 189 | defer rollbackTransaction(tx) |
| 190 | statements := []string{ |
| 191 | `CREATE TABLE IF NOT EXISTS drafts ( |
| 192 | id TEXT PRIMARY KEY, workspace_id TEXT NOT NULL, scope TEXT NOT NULL, |
| 193 | workspace_root TEXT NOT NULL, revision INTEGER NOT NULL, |
| 194 | content_json TEXT NOT NULL, settings_json TEXT NOT NULL, |
| 195 | status TEXT NOT NULL, updated_at INTEGER NOT NULL |
| 196 | )`, |
| 197 | `CREATE UNIQUE INDEX IF NOT EXISTS one_active_draft_per_workspace ON drafts(workspace_id) WHERE status = 'active'`, |
| 198 | `CREATE TABLE IF NOT EXISTS operations ( |
| 199 | id TEXT PRIMARY KEY, draft_id TEXT NOT NULL, workspace_id TEXT NOT NULL, |
| 200 | draft_revision INTEGER NOT NULL, session_id TEXT NOT NULL, |
| 201 | topic_id TEXT NOT NULL, |
| 202 | submission_id TEXT NOT NULL, fingerprint TEXT NOT NULL, |
| 203 | request_json TEXT NOT NULL, phase TEXT NOT NULL, error TEXT NOT NULL, |
| 204 | created_at INTEGER NOT NULL, updated_at INTEGER NOT NULL, |
| 205 | request_id TEXT NOT NULL DEFAULT '', source_digest TEXT NOT NULL DEFAULT '', |
| 206 | operation_revision INTEGER NOT NULL DEFAULT 1, execution_json TEXT NOT NULL DEFAULT '' |
| 207 | )`, |
| 208 | `CREATE INDEX IF NOT EXISTS operations_by_draft ON operations(draft_id, updated_at DESC)`, |
| 209 | `CREATE UNIQUE INDEX IF NOT EXISTS operations_by_request ON operations(draft_id, request_id) WHERE request_id <> ''`, |
| 210 | `CREATE TABLE IF NOT EXISTS conflicts ( |
| 211 | id INTEGER PRIMARY KEY AUTOINCREMENT, draft_id TEXT NOT NULL, |
| 212 | expected_revision INTEGER NOT NULL, actual_revision INTEGER NOT NULL, |
| 213 | content_json TEXT NOT NULL, settings_json TEXT NOT NULL, created_at INTEGER NOT NULL |
| 214 | )`, |
| 215 | `CREATE TABLE IF NOT EXISTS restore_state (slot TEXT PRIMARY KEY, draft_id TEXT NOT NULL, updated_at INTEGER NOT NULL)`, |
| 216 | fmt.Sprintf(`PRAGMA user_version = %d`, SchemaVersion), |
| 217 | } |
| 218 | for _, statement := range statements { |
| 219 | if _, err := tx.Exec(statement); err != nil { |
| 220 | return err |
| 221 | } |
| 222 | } |
| 223 | return tx.Commit() |
| 224 | } |
| 225 | |
| 226 | func migrateV3ToV4(db *sql.DB) error { |
| 227 | tx, err := db.Begin() |
| 228 | if err != nil { |
| 229 | return err |
| 230 | } |
| 231 | defer rollbackTransaction(tx) |
| 232 | for _, query := range []string{ |
| 233 | `ALTER TABLE operations ADD COLUMN request_id TEXT NOT NULL DEFAULT ''`, |
| 234 | `ALTER TABLE operations ADD COLUMN source_digest TEXT NOT NULL DEFAULT ''`, |
| 235 | `ALTER TABLE operations ADD COLUMN operation_revision INTEGER NOT NULL DEFAULT 1`, |
| 236 | `ALTER TABLE operations ADD COLUMN execution_json TEXT NOT NULL DEFAULT ''`, |
| 237 | `CREATE UNIQUE INDEX operations_by_request ON operations(draft_id, request_id) WHERE request_id <> ''`, |
| 238 | `PRAGMA user_version = 4`, |
| 239 | } { |
| 240 | if _, err := tx.Exec(query); err != nil { |
| 241 | return err |
| 242 | } |
| 243 | } |
| 244 | return tx.Commit() |
| 245 | } |
| 246 | |
| 247 | func migrateV1ToV2(db *sql.DB) error { |
| 248 | tx, err := db.Begin() |
| 249 | if err != nil { |
| 250 | return err |
| 251 | } |
| 252 | defer rollbackTransaction(tx) |
| 253 | if _, err := tx.Exec(`ALTER TABLE operations ADD COLUMN topic_id TEXT NOT NULL DEFAULT ''`); err != nil { |
| 254 | return err |
| 255 | } |
| 256 | if _, err := tx.Exec(`PRAGMA user_version = 2`); err != nil { |
| 257 | return err |
| 258 | } |
| 259 | return tx.Commit() |
| 260 | } |
| 261 | |
| 262 | // v3 makes operation request_json a versioned, frozen execution snapshot. |
| 263 | // The shape is validated by the application because keeping the JSON opaque |
| 264 | // lets older completed records remain readable without rewriting user data. |
| 265 | func migrateV2ToV3(db *sql.DB) error { |
| 266 | tx, err := db.Begin() |
| 267 | if err != nil { |
| 268 | return err |
| 269 | } |
| 270 | defer rollbackTransaction(tx) |
| 271 | if _, err := tx.Exec(`PRAGMA user_version = 3`); err != nil { |
| 272 | return err |
| 273 | } |
| 274 | return tx.Commit() |
| 275 | } |
| 276 | |
| 277 | func draftFileDSN(path string) string { |
| 278 | abs, err := filepath.Abs(path) |
| 279 | if err != nil { |
| 280 | abs = path |
| 281 | } |
| 282 | slash := filepath.ToSlash(abs) |
| 283 | if runtime.GOOS == "windows" && len(slash) >= 2 && slash[1] == ':' { |
| 284 | slash = "/" + slash |
| 285 | } |
| 286 | u := &url.URL{Scheme: "file", Path: slash} |
| 287 | return u.String() + "?_pragma=busy_timeout%285000%29&_pragma=foreign_keys%281%29" |
| 288 | } |
| 289 | |
| 290 | func (s *Store) withDB(ctx context.Context, fn func(*sql.DB) error) error { |
| 291 | s.mu.Lock() |
| 292 | defer s.mu.Unlock() |
| 293 | deadline := time.Now().Add(5 * time.Second) |
| 294 | backoff := 5 * time.Millisecond |
| 295 | for { |
| 296 | if err := s.openLocked(); err != nil { |
| 297 | if !isSQLiteBusy(err) { |
| 298 | return err |
| 299 | } |
| 300 | } else if err := fn(s.db); err != nil { |
| 301 | if !isSQLiteBusy(err) { |
| 302 | return err |
| 303 | } |
| 304 | } else { |
| 305 | return nil |
| 306 | } |
| 307 | |
| 308 | if time.Now().After(deadline) { |
| 309 | return fmt.Errorf("session draft database remained busy for 5s") |
| 310 | } |
| 311 | timer := time.NewTimer(backoff) |
| 312 | select { |
| 313 | case <-ctx.Done(): |
| 314 | timer.Stop() |
| 315 | return ctx.Err() |
| 316 | case <-timer.C: |
| 317 | } |
| 318 | if backoff < 100*time.Millisecond { |
| 319 | backoff *= 2 |
| 320 | } |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | func isSQLiteBusy(err error) bool { |
| 325 | var sqliteErr *sqlite.Error |
| 326 | if !errors.As(err, &sqliteErr) { |
| 327 | return false |
| 328 | } |
| 329 | code := sqliteErr.Code() & 0xff |
| 330 | return code == 5 || code == 6 |
| 331 | } |
| 332 | |
| 333 | func scanDraft(row interface{ Scan(...any) error }) (Draft, error) { |
| 334 | var draft Draft |
| 335 | var updated int64 |
| 336 | err := row.Scan(&draft.ID, &draft.WorkspaceID, &draft.Scope, &draft.WorkspaceRoot, |
| 337 | &draft.Revision, &draft.ContentJSON, &draft.SettingsJSON, &draft.Status, &updated) |
| 338 | if errors.Is(err, sql.ErrNoRows) { |
| 339 | return Draft{}, ErrNotFound |
| 340 | } |
| 341 | draft.UpdatedAt = time.UnixMilli(updated).UTC() |
| 342 | return draft, err |
| 343 | } |
| 344 | |
| 345 | const draftColumns = `id, workspace_id, scope, workspace_root, revision, content_json, settings_json, status, updated_at` |
| 346 | |
| 347 | func (s *Store) Open(ctx context.Context, workspaceID, scope, root, draftID, settings string) (Draft, bool, error) { |
| 348 | var result Draft |
| 349 | created := false |
| 350 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 351 | current, err := scanDraft(db.QueryRowContext(ctx, `SELECT `+draftColumns+` FROM drafts WHERE workspace_id = ? AND status = 'active'`, workspaceID)) |
| 352 | if err == nil { |
| 353 | result = current |
| 354 | return nil |
| 355 | } |
| 356 | if !errors.Is(err, ErrNotFound) { |
| 357 | return err |
| 358 | } |
| 359 | now := time.Now().UTC().UnixMilli() |
| 360 | _, err = db.ExecContext(ctx, `INSERT INTO drafts(id, workspace_id, scope, workspace_root, revision, content_json, settings_json, status, updated_at) VALUES(?,?,?,?,1,'{}',?,'active',?)`, draftID, workspaceID, scope, root, settings, now) |
| 361 | if err != nil { |
| 362 | // A concurrent process may have won the unique active-draft insert. |
| 363 | current, lookupErr := scanDraft(db.QueryRowContext(ctx, `SELECT `+draftColumns+` FROM drafts WHERE workspace_id = ? AND status = 'active'`, workspaceID)) |
| 364 | if lookupErr != nil { |
| 365 | return err |
| 366 | } |
| 367 | result = current |
| 368 | return nil |
| 369 | } |
| 370 | result = Draft{ID: draftID, WorkspaceID: workspaceID, Scope: scope, WorkspaceRoot: root, Revision: 1, ContentJSON: "{}", SettingsJSON: settings, Status: "active", UpdatedAt: time.UnixMilli(now).UTC()} |
| 371 | created = true |
| 372 | return nil |
| 373 | }) |
| 374 | return result, created, err |
| 375 | } |
| 376 | |
| 377 | func (s *Store) Get(ctx context.Context, draftID string) (Draft, error) { |
| 378 | var result Draft |
| 379 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 380 | var err error |
| 381 | result, err = scanDraft(db.QueryRowContext(ctx, `SELECT `+draftColumns+` FROM drafts WHERE id = ?`, draftID)) |
| 382 | return err |
| 383 | }) |
| 384 | return result, err |
| 385 | } |
| 386 | |
| 387 | func (s *Store) SetRestore(ctx context.Context, draftID string) error { |
| 388 | return s.withDB(ctx, func(db *sql.DB) error { |
| 389 | if strings.TrimSpace(draftID) == "" { |
| 390 | _, err := db.ExecContext(ctx, `DELETE FROM restore_state WHERE slot='active'`) |
| 391 | return err |
| 392 | } |
| 393 | var status string |
| 394 | if err := db.QueryRowContext(ctx, `SELECT status FROM drafts WHERE id=?`, draftID).Scan(&status); errors.Is(err, sql.ErrNoRows) { |
| 395 | return ErrNotFound |
| 396 | } else if err != nil { |
| 397 | return err |
| 398 | } else if status != "active" { |
| 399 | return ErrConverted |
| 400 | } |
| 401 | _, err := db.ExecContext(ctx, `INSERT INTO restore_state(slot,draft_id,updated_at) VALUES('active',?,?) ON CONFLICT(slot) DO UPDATE SET draft_id=excluded.draft_id, updated_at=excluded.updated_at`, draftID, time.Now().UTC().UnixMilli()) |
| 402 | return err |
| 403 | }) |
| 404 | } |
| 405 | |
| 406 | func (s *Store) Restore(ctx context.Context) (Draft, error) { |
| 407 | var result Draft |
| 408 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 409 | var err error |
| 410 | result, err = scanDraft(db.QueryRowContext(ctx, `SELECT `+draftColumns+` FROM drafts WHERE id=(SELECT draft_id FROM restore_state WHERE slot='active') AND status='active'`)) |
| 411 | return err |
| 412 | }) |
| 413 | return result, err |
| 414 | } |
| 415 | |
| 416 | func (s *Store) ClearRestore(ctx context.Context, draftID string) error { |
| 417 | return s.withDB(ctx, func(db *sql.DB) error { |
| 418 | _, err := db.ExecContext(ctx, `DELETE FROM restore_state WHERE slot='active' AND draft_id=?`, draftID) |
| 419 | return err |
| 420 | }) |
| 421 | } |
| 422 | |
| 423 | func (s *Store) Save(ctx context.Context, draftID string, expected uint64, content, settings string, _ bool) (Draft, error) { |
| 424 | var result Draft |
| 425 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 426 | tx, err := db.BeginTx(ctx, nil) |
| 427 | if err != nil { |
| 428 | return err |
| 429 | } |
| 430 | defer rollbackTransaction(tx) |
| 431 | current, err := scanDraft(tx.QueryRowContext(ctx, `SELECT `+draftColumns+` FROM drafts WHERE id = ?`, draftID)) |
| 432 | if err != nil { |
| 433 | return err |
| 434 | } |
| 435 | if current.Status != "active" { |
| 436 | return ErrConverted |
| 437 | } |
| 438 | var activeOperations int |
| 439 | if err := tx.QueryRowContext(ctx, `SELECT COUNT(*) FROM operations WHERE draft_id=? AND phase NOT IN ('cancelled','terminal_failed')`, draftID).Scan(&activeOperations); err != nil { |
| 440 | return err |
| 441 | } |
| 442 | if activeOperations > 0 { |
| 443 | return ErrOperationConflict |
| 444 | } |
| 445 | if current.Revision != expected { |
| 446 | _, conflictErr := tx.ExecContext(ctx, `INSERT INTO conflicts(draft_id,expected_revision,actual_revision,content_json,settings_json,created_at) VALUES(?,?,?,?,?,?)`, draftID, expected, current.Revision, content, settings, time.Now().UTC().UnixMilli()) |
| 447 | if conflictErr != nil { |
| 448 | return conflictErr |
| 449 | } |
| 450 | if err := tx.Commit(); err != nil { |
| 451 | return err |
| 452 | } |
| 453 | result = current |
| 454 | return ErrConflict |
| 455 | } |
| 456 | now := time.Now().UTC().UnixMilli() |
| 457 | next := current.Revision + 1 |
| 458 | resultUpdate, err := tx.ExecContext(ctx, `UPDATE drafts SET revision=?,content_json=?,settings_json=?,updated_at=? WHERE id=? AND status='active' AND revision=?`, next, content, settings, now, draftID, current.Revision) |
| 459 | if err != nil { |
| 460 | return err |
| 461 | } |
| 462 | if changed, err := resultUpdate.RowsAffected(); err != nil || changed != 1 { |
| 463 | if err != nil { |
| 464 | return err |
| 465 | } |
| 466 | return ErrConflict |
| 467 | } |
| 468 | if err := tx.Commit(); err != nil { |
| 469 | return err |
| 470 | } |
| 471 | result = current |
| 472 | result.Revision = next |
| 473 | result.ContentJSON = content |
| 474 | result.SettingsJSON = settings |
| 475 | result.UpdatedAt = time.UnixMilli(now).UTC() |
| 476 | return nil |
| 477 | }) |
| 478 | return result, err |
| 479 | } |
| 480 | |
| 481 | func (s *Store) ListActive(ctx context.Context) ([]Draft, error) { |
| 482 | out := []Draft{} |
| 483 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 484 | rows, err := db.QueryContext(ctx, `SELECT `+draftColumns+` FROM drafts WHERE status='active' ORDER BY updated_at DESC`) |
| 485 | if err != nil { |
| 486 | return err |
| 487 | } |
| 488 | defer rows.Close() |
| 489 | for rows.Next() { |
| 490 | draft, err := scanDraft(rows) |
| 491 | if err != nil { |
| 492 | return err |
| 493 | } |
| 494 | out = append(out, draft) |
| 495 | } |
| 496 | return rows.Err() |
| 497 | }) |
| 498 | return out, err |
| 499 | } |
| 500 | |
| 501 | func (s *Store) Discard(ctx context.Context, draftID string, expected uint64) error { |
| 502 | return s.withDB(ctx, func(db *sql.DB) error { |
| 503 | tx, err := db.BeginTx(ctx, nil) |
| 504 | if err != nil { |
| 505 | return err |
| 506 | } |
| 507 | defer rollbackTransaction(tx) |
| 508 | current, err := scanDraft(tx.QueryRowContext(ctx, `SELECT `+draftColumns+` FROM drafts WHERE id=?`, draftID)) |
| 509 | if err != nil { |
| 510 | return err |
| 511 | } |
| 512 | if current.Status != "active" { |
| 513 | return ErrConverted |
| 514 | } |
| 515 | if current.Revision != expected { |
| 516 | return ErrConflict |
| 517 | } |
| 518 | var count int |
| 519 | if err := tx.QueryRowContext(ctx, `SELECT COUNT(*) FROM operations WHERE draft_id=? AND phase NOT IN ('cancelled','terminal_failed')`, draftID).Scan(&count); err != nil { |
| 520 | return err |
| 521 | } |
| 522 | if count > 0 { |
| 523 | return ErrOperationConflict |
| 524 | } |
| 525 | if _, err = tx.ExecContext(ctx, `UPDATE drafts SET status='discarded',revision=revision+1,updated_at=? WHERE id=?`, time.Now().UTC().UnixMilli(), draftID); err != nil { |
| 526 | return err |
| 527 | } |
| 528 | if _, err = tx.ExecContext(ctx, `DELETE FROM restore_state WHERE slot='active' AND draft_id=?`, draftID); err != nil { |
| 529 | return err |
| 530 | } |
| 531 | return tx.Commit() |
| 532 | }) |
| 533 | } |
| 534 | |
| 535 | func (s *Store) BeginOperation(ctx context.Context, op Operation) (Operation, bool, error) { |
| 536 | var result Operation |
| 537 | created := false |
| 538 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 539 | tx, err := db.BeginTx(ctx, nil) |
| 540 | if err != nil { |
| 541 | return err |
| 542 | } |
| 543 | defer rollbackTransaction(tx) |
| 544 | // Resolve request identity before checking the editable slot: a lost |
| 545 | // response may be retried after receipt has converted the draft. |
| 546 | if op.RequestID != "" { |
| 547 | prior, lookupErr := scanOperation(tx.QueryRowContext(ctx, `SELECT `+operationColumns+` FROM operations WHERE draft_id=? AND request_id=?`, op.DraftID, op.RequestID)) |
| 548 | if lookupErr == nil { |
| 549 | if prior.Fingerprint != op.Fingerprint || prior.SourceDigest != op.SourceDigest { |
| 550 | return ErrOperationConflict |
| 551 | } |
| 552 | result = prior |
| 553 | return nil |
| 554 | } |
| 555 | if !errors.Is(lookupErr, ErrOperationNotFound) { |
| 556 | return lookupErr |
| 557 | } |
| 558 | } |
| 559 | draft, err := scanDraft(tx.QueryRowContext(ctx, `SELECT `+draftColumns+` FROM drafts WHERE id=?`, op.DraftID)) |
| 560 | if err != nil { |
| 561 | return err |
| 562 | } |
| 563 | if draft.Status != "active" { |
| 564 | return ErrConverted |
| 565 | } |
| 566 | if draft.Revision != op.DraftRevision { |
| 567 | return ErrConflict |
| 568 | } |
| 569 | if op.SourceDigest != "" { |
| 570 | digest, err := SnapshotDigest(draft.ContentJSON, draft.SettingsJSON) |
| 571 | if err != nil { |
| 572 | return err |
| 573 | } |
| 574 | if digest != op.SourceDigest { |
| 575 | return ErrConflict |
| 576 | } |
| 577 | } |
| 578 | prior, err := scanOperation(tx.QueryRowContext(ctx, `SELECT id,draft_id,workspace_id,draft_revision,session_id,topic_id,submission_id,fingerprint,request_json,phase,error,created_at,updated_at,request_id,source_digest,operation_revision,execution_json FROM operations WHERE draft_id=? ORDER BY rowid DESC LIMIT 1`, op.DraftID)) |
| 579 | if err == nil && prior.Phase != "cancelled" && prior.Phase != "terminal_failed" { |
| 580 | if prior.Fingerprint != op.Fingerprint { |
| 581 | return ErrOperationConflict |
| 582 | } |
| 583 | result = prior |
| 584 | return nil |
| 585 | } |
| 586 | if err != nil && !errors.Is(err, ErrOperationNotFound) { |
| 587 | return err |
| 588 | } |
| 589 | if err == nil && prior.SessionID != "" { |
| 590 | op.SessionID = prior.SessionID |
| 591 | op.TopicID = prior.TopicID |
| 592 | } |
| 593 | now := time.Now().UTC() |
| 594 | op.CreatedAt, op.UpdatedAt, op.Phase, op.Error, op.Revision = now, now, "reserved", "", 1 |
| 595 | _, err = tx.ExecContext(ctx, `INSERT INTO operations(id,draft_id,workspace_id,draft_revision,session_id,topic_id,submission_id,fingerprint,request_json,phase,error,created_at,updated_at,request_id,source_digest,operation_revision) VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)`, op.ID, op.DraftID, op.WorkspaceID, op.DraftRevision, op.SessionID, op.TopicID, op.SubmissionID, op.Fingerprint, op.RequestJSON, op.Phase, op.Error, now.UnixMilli(), now.UnixMilli(), op.RequestID, op.SourceDigest, op.Revision) |
| 596 | if err != nil { |
| 597 | return err |
| 598 | } |
| 599 | if err := tx.Commit(); err != nil { |
| 600 | return err |
| 601 | } |
| 602 | result, created = op, true |
| 603 | return nil |
| 604 | }) |
| 605 | return result, created, err |
| 606 | } |
| 607 | |
| 608 | func scanOperation(row interface{ Scan(...any) error }) (Operation, error) { |
| 609 | var op Operation |
| 610 | var created, updated int64 |
| 611 | err := row.Scan(&op.ID, &op.DraftID, &op.WorkspaceID, &op.DraftRevision, &op.SessionID, &op.TopicID, &op.SubmissionID, &op.Fingerprint, &op.RequestJSON, &op.Phase, &op.Error, &created, &updated, &op.RequestID, &op.SourceDigest, &op.Revision, &op.ExecutionJSON) |
| 612 | if errors.Is(err, sql.ErrNoRows) { |
| 613 | return Operation{}, ErrOperationNotFound |
| 614 | } |
| 615 | op.CreatedAt, op.UpdatedAt = time.UnixMilli(created).UTC(), time.UnixMilli(updated).UTC() |
| 616 | return op, err |
| 617 | } |
| 618 | |
| 619 | func (s *Store) Operation(ctx context.Context, id string) (Operation, error) { |
| 620 | var result Operation |
| 621 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 622 | var err error |
| 623 | result, err = scanOperation(db.QueryRowContext(ctx, `SELECT id,draft_id,workspace_id,draft_revision,session_id,topic_id,submission_id,fingerprint,request_json,phase,error,created_at,updated_at,request_id,source_digest,operation_revision,execution_json FROM operations WHERE id=?`, id)) |
| 624 | return err |
| 625 | }) |
| 626 | return result, err |
| 627 | } |
| 628 | |
| 629 | func (s *Store) PendingOperations(ctx context.Context) ([]Operation, error) { |
| 630 | out := []Operation{} |
| 631 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 632 | rows, err := db.QueryContext(ctx, `SELECT o.id,o.draft_id,o.workspace_id,o.draft_revision,o.session_id,o.topic_id,o.submission_id,o.fingerprint,o.request_json,o.phase,o.error,o.created_at,o.updated_at,o.request_id,o.source_digest,o.operation_revision,o.execution_json FROM operations o JOIN drafts d ON d.id=o.draft_id WHERE d.status='active' AND o.phase NOT IN ('cancelled','terminal_failed') ORDER BY o.created_at`) |
| 633 | if err != nil { |
| 634 | return err |
| 635 | } |
| 636 | defer rows.Close() |
| 637 | for rows.Next() { |
| 638 | op, err := scanOperation(rows) |
| 639 | if err != nil { |
| 640 | return err |
| 641 | } |
| 642 | out = append(out, op) |
| 643 | } |
| 644 | return rows.Err() |
| 645 | }) |
| 646 | return out, err |
| 647 | } |
| 648 | |
| 649 | func (s *Store) SetOperationPhase(ctx context.Context, id, phase, message string) (Operation, error) { |
| 650 | var result Operation |
| 651 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 652 | now := time.Now().UTC().UnixMilli() |
| 653 | if _, err := db.ExecContext(ctx, `UPDATE operations SET phase=?,error=?,updated_at=?,operation_revision=operation_revision+1 WHERE id=?`, phase, message, now, id); err != nil { |
| 654 | return err |
| 655 | } |
| 656 | var err error |
| 657 | result, err = scanOperation(db.QueryRowContext(ctx, `SELECT id,draft_id,workspace_id,draft_revision,session_id,topic_id,submission_id,fingerprint,request_json,phase,error,created_at,updated_at,request_id,source_digest,operation_revision,execution_json FROM operations WHERE id=?`, id)) |
| 658 | return err |
| 659 | }) |
| 660 | return result, err |
| 661 | } |
| 662 | |
| 663 | func (s *Store) ClaimOperationPhase(ctx context.Context, id string, from []string, phase string) (Operation, bool, error) { |
| 664 | return s.TransitionOperationPhase(ctx, id, from, phase, "") |
| 665 | } |
| 666 | |
| 667 | func (s *Store) TransitionOperationPhase(ctx context.Context, id string, from []string, phase, message string) (Operation, bool, error) { |
| 668 | var result Operation |
| 669 | claimed := false |
| 670 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 671 | if len(from) == 0 { |
| 672 | return ErrOperationConflict |
| 673 | } |
| 674 | placeholders := make([]string, len(from)) |
| 675 | args := make([]any, 0, len(from)+4) |
| 676 | args = append(args, phase, message, time.Now().UTC().UnixMilli(), id) |
| 677 | for i, value := range from { |
| 678 | placeholders[i] = "?" |
| 679 | args = append(args, value) |
| 680 | } |
| 681 | updated, err := db.ExecContext(ctx, `UPDATE operations SET phase=?,error=?,updated_at=?,operation_revision=operation_revision+1 WHERE id=? AND phase IN (`+strings.Join(placeholders, ",")+`)`, args...) |
| 682 | if err != nil { |
| 683 | return err |
| 684 | } |
| 685 | count, err := updated.RowsAffected() |
| 686 | if err != nil { |
| 687 | return err |
| 688 | } |
| 689 | claimed = count == 1 |
| 690 | result, err = scanOperation(db.QueryRowContext(ctx, `SELECT id,draft_id,workspace_id,draft_revision,session_id,topic_id,submission_id,fingerprint,request_json,phase,error,created_at,updated_at,request_id,source_digest,operation_revision,execution_json FROM operations WHERE id=?`, id)) |
| 691 | return err |
| 692 | }) |
| 693 | return result, claimed, err |
| 694 | } |
| 695 | |
| 696 | func (s *Store) UpdateOperationRequest(ctx context.Context, id, phase, requestJSON string) (Operation, bool, error) { |
| 697 | var result Operation |
| 698 | updated := false |
| 699 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 700 | now := time.Now().UTC().UnixMilli() |
| 701 | change, err := db.ExecContext(ctx, `UPDATE operations SET execution_json=?,updated_at=?,operation_revision=operation_revision+1 WHERE id=? AND phase=?`, requestJSON, now, id, phase) |
| 702 | if err != nil { |
| 703 | return err |
| 704 | } |
| 705 | count, err := change.RowsAffected() |
| 706 | if err != nil { |
| 707 | return err |
| 708 | } |
| 709 | updated = count == 1 |
| 710 | result, err = scanOperation(db.QueryRowContext(ctx, `SELECT id,draft_id,workspace_id,draft_revision,session_id,topic_id,submission_id,fingerprint,request_json,phase,error,created_at,updated_at,request_id,source_digest,operation_revision,execution_json FROM operations WHERE id=?`, id)) |
| 711 | return err |
| 712 | }) |
| 713 | return result, updated, err |
| 714 | } |
| 715 | |
| 716 | func (s *Store) EnsureOperationTopic(ctx context.Context, id, topicID string) (Operation, error) { |
| 717 | var result Operation |
| 718 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 719 | if _, err := db.ExecContext(ctx, `UPDATE operations SET topic_id=?,updated_at=?,operation_revision=operation_revision+1 WHERE id=? AND topic_id=''`, topicID, time.Now().UTC().UnixMilli(), id); err != nil { |
| 720 | return err |
| 721 | } |
| 722 | var err error |
| 723 | result, err = scanOperation(db.QueryRowContext(ctx, `SELECT id,draft_id,workspace_id,draft_revision,session_id,topic_id,submission_id,fingerprint,request_json,phase,error,created_at,updated_at,request_id,source_digest,operation_revision,execution_json FROM operations WHERE id=?`, id)) |
| 724 | return err |
| 725 | }) |
| 726 | return result, err |
| 727 | } |
| 728 | |
| 729 | // AcceptAndConvert publishes the durable submission receipt and releases the |
| 730 | // Workspace draft slot in one database transaction. |
| 731 | func (s *Store) AcceptAndConvert(ctx context.Context, draftID, operationID string) (Operation, error) { |
| 732 | var result Operation |
| 733 | err := s.withDB(ctx, func(db *sql.DB) error { |
| 734 | tx, err := db.BeginTx(ctx, nil) |
| 735 | if err != nil { |
| 736 | return err |
| 737 | } |
| 738 | defer rollbackTransaction(tx) |
| 739 | op, err := scanOperation(tx.QueryRowContext(ctx, `SELECT id,draft_id,workspace_id,draft_revision,session_id,topic_id,submission_id,fingerprint,request_json,phase,error,created_at,updated_at,request_id,source_digest,operation_revision,execution_json FROM operations WHERE id=? AND draft_id=?`, operationID, draftID)) |
| 740 | if err != nil { |
| 741 | return err |
| 742 | } |
| 743 | if op.Phase != "accepted" && op.Phase != "dispatching" && op.Phase != "dispatch_unknown" && op.Phase != "dispatching_shell" { |
| 744 | return ErrOperationConflict |
| 745 | } |
| 746 | now := time.Now().UTC().UnixMilli() |
| 747 | if op.Phase != "accepted" { |
| 748 | changed, err := tx.ExecContext(ctx, `UPDATE operations SET phase='accepted',error='',updated_at=?,operation_revision=operation_revision+1 WHERE id=? AND phase=?`, now, operationID, op.Phase) |
| 749 | if err != nil { |
| 750 | return err |
| 751 | } |
| 752 | op.Revision++ |
| 753 | if count, err := changed.RowsAffected(); err != nil || count != 1 { |
| 754 | if err != nil { |
| 755 | return err |
| 756 | } |
| 757 | return ErrOperationConflict |
| 758 | } |
| 759 | } |
| 760 | converted, err := tx.ExecContext(ctx, `UPDATE drafts SET status='converted',revision=revision+1,updated_at=? WHERE id=? AND status='active'`, now, draftID) |
| 761 | if err != nil { |
| 762 | return err |
| 763 | } |
| 764 | if count, err := converted.RowsAffected(); err != nil { |
| 765 | return err |
| 766 | } else if count == 0 { |
| 767 | var status string |
| 768 | if err := tx.QueryRowContext(ctx, `SELECT status FROM drafts WHERE id=?`, draftID).Scan(&status); err != nil { |
| 769 | return err |
| 770 | } |
| 771 | if status != "converted" { |
| 772 | return ErrOperationConflict |
| 773 | } |
| 774 | } |
| 775 | if _, err := tx.ExecContext(ctx, `DELETE FROM restore_state WHERE slot='active' AND draft_id=?`, draftID); err != nil { |
| 776 | return err |
| 777 | } |
| 778 | if err := tx.Commit(); err != nil { |
| 779 | return err |
| 780 | } |
| 781 | op.Phase, op.Error, op.UpdatedAt = "accepted", "", time.UnixMilli(now).UTC() |
| 782 | result = op |
| 783 | return nil |
| 784 | }) |
| 785 | return result, err |
| 786 | } |
| 787 | |
| 788 | func (s *Store) Convert(ctx context.Context, draftID, operationID string) error { |
| 789 | return s.withDB(ctx, func(db *sql.DB) error { |
| 790 | tx, err := db.BeginTx(ctx, nil) |
| 791 | if err != nil { |
| 792 | return err |
| 793 | } |
| 794 | defer rollbackTransaction(tx) |
| 795 | var phase string |
| 796 | if err := tx.QueryRowContext(ctx, `SELECT phase FROM operations WHERE id=? AND draft_id=?`, operationID, draftID).Scan(&phase); err != nil { |
| 797 | return err |
| 798 | } |
| 799 | if phase != "accepted" { |
| 800 | return ErrOperationConflict |
| 801 | } |
| 802 | if _, err := tx.ExecContext(ctx, `UPDATE drafts SET status='converted',revision=revision+1,updated_at=? WHERE id=? AND status='active'`, time.Now().UTC().UnixMilli(), draftID); err != nil { |
| 803 | return err |
| 804 | } |
| 805 | return tx.Commit() |
| 806 | }) |
| 807 | } |
| 808 |