| 1 | package cli |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "path/filepath" |
| 6 | "strings" |
| 7 | |
| 8 | "reasonix/internal/agent" |
| 9 | "reasonix/internal/control" |
| 10 | ) |
| 11 | |
| 12 | // sessionLeaseResumeRefusal is the startup-time refusal for `reasonix |
| 13 | // [--resume|--continue]` and `reasonix run --resume/--continue`: it names the |
| 14 | // holder and offers the two ways out (close the holder, or continue in a |
| 15 | // duplicated session via --copy). |
| 16 | func sessionLeaseResumeRefusal(err error) string { |
| 17 | return control.SessionInUseMessage(err) + |
| 18 | "; close the other Reasonix window or process, or rerun with --copy to continue in a duplicated session" |
| 19 | } |
| 20 | |
| 21 | // sessionLeaseHeldNotice is the in-TUI refusal for /resume and /switch, where |
| 22 | // exiting to rerun with --copy is not the natural move. |
| 23 | func sessionLeaseHeldNotice(err error) string { |
| 24 | return control.SessionInUseMessage(err) + "; " + control.SessionLeaseCloseHint |
| 25 | } |
| 26 | |
| 27 | // rebindSessionLease moves the chat TUI's session lease to path before the |
| 28 | // controller binds it for writing. A nil keeper (tests, persistence disabled) |
| 29 | // gates nothing. On error the keeper still guards the previous session. |
| 30 | func (m *chatTUI) rebindSessionLease(path string) error { |
| 31 | if m.leases == nil { |
| 32 | return nil |
| 33 | } |
| 34 | return m.leases.Rebind(path) |
| 35 | } |
| 36 | |
| 37 | // restoreSessionLease re-points the lease at the controller's current session |
| 38 | // after a switch attempt moved it but the switch itself then failed. |
| 39 | // Best-effort: the old lease was released during the rebind, so in the |
| 40 | // (unlikely) case another runtime grabbed it in between this stays silent and |
| 41 | // the next write surfaces the conflict. |
| 42 | func (m *chatTUI) restoreSessionLease() { |
| 43 | if m.leases == nil { |
| 44 | return |
| 45 | } |
| 46 | _ = m.leases.Rebind(m.ctrl.SessionPath()) |
| 47 | } |
| 48 | |
| 49 | // followSessionLease re-points the TUI's session lease at the controller's |
| 50 | // current session file after an operation that rotated it to a fresh path |
| 51 | // (/new, /clear, /branch, fork). A fresh path cannot be held by anyone else, |
| 52 | // so failure is theoretical — but never silent. |
| 53 | func (m *chatTUI) followSessionLease() { |
| 54 | if m.leases == nil { |
| 55 | return |
| 56 | } |
| 57 | if err := m.leases.Rebind(m.ctrl.SessionPath()); err != nil { |
| 58 | m.notice(sessionLeaseHeldNotice(err)) |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | // cliSessionRecoveredHandler moves the single-session CLI lease during the |
| 63 | // controller's recovery commit. The callback runs before Controller changes its |
| 64 | // session path, closing the unguarded interval that event-driven follow-up |
| 65 | // calls left after ordinary turn-end and mid-turn autosaves. |
| 66 | func cliSessionRecoveredHandler(leases *control.SessionLeaseKeeper) func(control.SessionRecoveryInfo) error { |
| 67 | return leases.HandleSessionRecovered |
| 68 | } |
| 69 | |
| 70 | // copySessionForWriting duplicates the session at src into a fresh session |
| 71 | // file beside it and returns the new path. It backs the --copy escape hatch: |
| 72 | // when src is held by another runtime, the copy gives this process a session |
| 73 | // it can own. The duplicate is written through Session.Save, so it is |
| 74 | // event-log aware (authoritative event log plus .jsonl checkpoint) and starts |
| 75 | // with no lease/lock sidecars of its own; src is only read. When src is being |
| 76 | // written concurrently, the copy captures the transcript as of the load — an |
| 77 | // append-only prefix, the same view a resume would see. |
| 78 | func copySessionForWriting(src string) (string, error) { |
| 79 | loaded, err := loadResumableSession(src) |
| 80 | if err != nil { |
| 81 | return "", err |
| 82 | } |
| 83 | msgs := loaded.Snapshot() |
| 84 | |
| 85 | var srcMeta agent.BranchMeta |
| 86 | if meta, ok, metaErr := agent.LoadBranchMeta(src); metaErr == nil && ok { |
| 87 | srcMeta = meta |
| 88 | } |
| 89 | label := "session" |
| 90 | if model, ok := agent.LoadSessionModel(src); ok && strings.TrimSpace(model) != "" { |
| 91 | label = model |
| 92 | } |
| 93 | |
| 94 | newPath := agent.NewSessionPath(filepath.Dir(src), label) |
| 95 | copySess := agent.NewSession("") |
| 96 | copySess.Messages = msgs |
| 97 | if err := copySess.Save(newPath); err != nil { |
| 98 | return "", fmt.Errorf("copy session: %w", err) |
| 99 | } |
| 100 | preview, turns := agent.SessionPreviewFromMessages(msgs) |
| 101 | meta := agent.BranchMeta{ |
| 102 | ParentID: agent.BranchID(src), |
| 103 | ForkTurn: -1, |
| 104 | ForkMessageIndex: len(msgs), |
| 105 | Preview: preview, |
| 106 | Turns: turns, |
| 107 | SchemaVersion: agent.BranchMetaCountsVersion, |
| 108 | Model: srcMeta.Model, |
| 109 | } |
| 110 | if title := strings.TrimSpace(firstNonEmpty(srcMeta.CustomTitle, srcMeta.TopicTitle)); title != "" { |
| 111 | meta.CustomTitle = title + " (copy)" |
| 112 | } |
| 113 | if err := agent.SaveBranchMeta(newPath, meta); err != nil { |
| 114 | return "", fmt.Errorf("copy session meta: %w", err) |
| 115 | } |
| 116 | return newPath, nil |
| 117 | } |
| 118 |