| 1 | package replication |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "fmt" |
| 6 | "time" |
| 7 | |
| 8 | "github.com/FelineStateMachine/tinyrelay/internal/event" |
| 9 | "github.com/FelineStateMachine/tinyrelay/internal/storage" |
| 10 | ) |
| 11 | |
| 12 | // PullTransport reads events from target. The transport owns network clients |
| 13 | // and their lifecycle; PullOnce owns validation and storage. |
| 14 | type PullTransport interface { |
| 15 | Query(ctx context.Context, target string, filter event.Filter) ([]event.Event, error) |
| 16 | } |
| 17 | |
| 18 | // PushTransport sends one event to target. PushAfter advances its cursor only |
| 19 | // after Send returns, including a relay duplicate acknowledgment. |
| 20 | type PushTransport interface { |
| 21 | Send(ctx context.Context, target string, e event.Event) (DeliveryResult, error) |
| 22 | } |
| 23 | |
| 24 | // SyncStats summarizes one pull or push pass. |
| 25 | type SyncStats struct { |
| 26 | Stored int |
| 27 | Duplicates int |
| 28 | Rejected int |
| 29 | Sent int |
| 30 | Refused int |
| 31 | } |
| 32 | |
| 33 | func PullOnce(ctx context.Context, store *storage.Store, transport PullTransport, target string, filter event.Filter, now int64) (SyncStats, error) { |
| 34 | return PullOnceWithIngest(ctx, store, transport, target, filter, now, nil) |
| 35 | } |
| 36 | |
| 37 | func PullOnceWithIngest(ctx context.Context, store *storage.Store, transport PullTransport, target string, filter event.Filter, now int64, ingest func(context.Context, event.Event, Origin) error) (SyncStats, error) { |
| 38 | if !safeRelayURL(target) { |
| 39 | return SyncStats{}, fmt.Errorf("replication: invalid pull target %q" , target) |
| 40 | } |
| 41 | items, err := transport.Query(ctx, target, filter) |
| 42 | if err != nil { |
| 43 | return SyncStats{}, fmt.Errorf("replication: query %s: %w" , target, err) |
| 44 | } |
| 45 | var stats SyncStats |
| 46 | for _, item := range items { |
| 47 | if err := ctx.Err(); err != nil { |
| 48 | return stats, err |
| 49 | } |
| 50 | if err := event.Validate(item); err != nil { |
| 51 | stats.Rejected++ |
| 52 | continue |
| 53 | } |
| 54 | var saveErr error |
| 55 | if ingest != nil { |
| 56 | saveErr = ingest(ctx, item, OriginImport) |
| 57 | } else { |
| 58 | _, saveErr = store.Save(ctx, item, storage.SaveOptions{Now: now}) |
| 59 | } |
| 60 | switch { |
| 61 | case saveErr == nil: |
| 62 | stats.Stored++ |
| 63 | case saveErr == storage.ErrDuplicate || saveErr == storage.ErrReplaced: |
| 64 | stats.Duplicates++ |
| 65 | default: |
| 66 | stats.Rejected++ |
| 67 | } |
| 68 | } |
| 69 | return stats, nil |
| 70 | } |
| 71 | |
| 72 | func PushAfter(ctx context.Context, store *storage.Store, transport PushTransport, target string, cursor int64, filter event.Filter, now int64) (SyncStats, int64, error) { |
| 73 | if !safeRelayURL(target) { |
| 74 | return SyncStats{}, cursor, fmt.Errorf("replication: invalid push target %q" , target) |
| 75 | } |
| 76 | rows, err := store.After(ctx, cursor, filter, storage.QueryOptions{Now: now, Access: storage.Access{All: true}, Limit: 0}) |
| 77 | if err != nil { |
| 78 | return SyncStats{}, cursor, fmt.Errorf("replication: read push cursor: %w" , err) |
| 79 | } |
| 80 | var stats SyncStats |
| 81 | last := cursor |
| 82 | for _, row := range rows { |
| 83 | if err := ctx.Err(); err != nil { |
| 84 | return stats, last, err |
| 85 | } |
| 86 | result, sendErr := transport.Send(ctx, target, row.Event) |
| 87 | if sendErr != nil { |
| 88 | return stats, last, fmt.Errorf("replication: push event: %w" , sendErr) |
| 89 | } |
| 90 | if result.Accepted || isDuplicate(result.Message) { |
| 91 | stats.Sent++ |
| 92 | } else { |
| 93 | stats.Refused++ |
| 94 | } |
| 95 | last = row.Sequence |
| 96 | } |
| 97 | return stats, last, nil |
| 98 | } |
| 99 | |
| 100 | func NextRun(spec JobSpec, finished time.Time) time.Time { |
| 101 | if spec.Every <= 0 { |
| 102 | return time.Time{} |
| 103 | } |
| 104 | return finished.Add(time.Duration(spec.Every) * time.Hour) |
| 105 | } |