| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "os" |
| 5 | "reasonix/desktop/internal/workspacestate" |
| 6 | "reasonix/internal/agent" |
| 7 | "reasonix/internal/store" |
| 8 | "sync" |
| 9 | ) |
| 10 | |
| 11 | type sourceHeadObservation struct { |
| 12 | info os.FileInfo |
| 13 | index *agent.SessionHeadIndex |
| 14 | } |
| 15 | |
| 16 | var sourceHeadRows sync.Map |
| 17 | |
| 18 | // A mapped DAG head must not return as an unidentified path placeholder while |
| 19 | // its index is unavailable. This is a display filter, not an ownership alias: |
| 20 | // independently identified siblings remain eligible for their own rows. |
| 21 | // Adoption belongs to the source, not to the workspace a sidecar lists it in. |
| 22 | func adoptedSourceRows(state workspacestate.State) map[string]bool { |
| 23 | adopted := map[string]bool{} |
| 24 | for _, mapping := range state.SourceMappings { |
| 25 | for _, key := range state.SourceKeys(mapping.SourceKey) { |
| 26 | adopted["source\x00local\x00"+key] = true |
| 27 | } |
| 28 | adopted["source\x00local\x00"+desktopSourceKey(mapping.Path, "")] = true |
| 29 | if sourceMappingHasPathAlias(mapping) { |
| 30 | adopted[sessionRuntimeKey(mapping.Path)] = true |
| 31 | } |
| 32 | } |
| 33 | return adopted |
| 34 | } |
| 35 | |
| 36 | // A single-head DAG is displayed by path, while upgrades record its head ID. |
| 37 | // Use the same path alias in every projection so retained originals cannot |
| 38 | // reappear after their canonical session is archived. Multi-head rows keep |
| 39 | // independent identities; adopting one must never hide its siblings. |
| 40 | func sourceMappingHasPathAlias(mapping workspacestate.SourceMapping) bool { |
| 41 | if mapping.HeadID == "" { |
| 42 | return true |
| 43 | } |
| 44 | heads, err := sessionSourceHeads(mapping.Path) |
| 45 | if err != nil { |
| 46 | return false |
| 47 | } |
| 48 | visible := 0 |
| 49 | selected := false |
| 50 | for _, head := range heads { |
| 51 | if head.Retired { |
| 52 | continue |
| 53 | } |
| 54 | if head.Kind != agent.HeadKindConcurrent { |
| 55 | visible++ |
| 56 | } |
| 57 | if head.Selected && head.ID == mapping.HeadID { |
| 58 | selected = true |
| 59 | } |
| 60 | } |
| 61 | return selected && visible <= 1 |
| 62 | } |
| 63 | |
| 64 | // Listing consumes only the published head index. Replaying an event log here |
| 65 | // would make sidebar pagination perform content work and contend with writers. |
| 66 | // Missing/stale indices degrade to one path row and are repaired separately. |
| 67 | func sessionSourceHeads(path string) ([]agent.SessionHead, error) { |
| 68 | if _, err := os.Stat(path); err != nil { |
| 69 | sourceHeadRows.Delete(path) |
| 70 | return nil, err |
| 71 | } |
| 72 | info, err := os.Stat(store.SessionEventIndex(path)) |
| 73 | if err != nil { |
| 74 | sourceHeadRows.Delete(path) |
| 75 | if os.IsNotExist(err) { |
| 76 | return nil, nil |
| 77 | } |
| 78 | return nil, err |
| 79 | } |
| 80 | // The checkpoint, event log, and head index are published independently. |
| 81 | // Cache only the decoded index, keyed by that file's own identity, and |
| 82 | // validate its log coverage on every read. A transient missing/stale index |
| 83 | // must not survive publication merely because the checkpoint is unchanged. |
| 84 | var index *agent.SessionHeadIndex |
| 85 | if cached, ok := sourceHeadRows.Load(path); ok { |
| 86 | entry := cached.(sourceHeadObservation) |
| 87 | if os.SameFile(entry.info, info) && entry.info.Size() == info.Size() && entry.info.ModTime().Equal(info.ModTime()) { |
| 88 | index = entry.index |
| 89 | } |
| 90 | } |
| 91 | if index == nil { |
| 92 | index, err = agent.ReadSessionHeadIndex(path) |
| 93 | if err != nil || index == nil { |
| 94 | sourceHeadRows.Delete(path) |
| 95 | return nil, err |
| 96 | } |
| 97 | sourceHeadRows.Store(path, sourceHeadObservation{info: info, index: index}) |
| 98 | } |
| 99 | if !index.Current(path) { |
| 100 | return nil, nil |
| 101 | } |
| 102 | return index.Heads, nil |
| 103 | } |
| 104 | |
| 105 | func expandSessionSourceRows(node ProjectNode) []ProjectNode { |
| 106 | if node.Session != nil || node.SessionPath == "" || node.RecoveryState == "recovery_only" { |
| 107 | return []ProjectNode{node} |
| 108 | } |
| 109 | heads, err := sessionSourceHeads(node.SessionPath) |
| 110 | if err != nil { |
| 111 | node.Health = "degraded" |
| 112 | } |
| 113 | live := []agent.SessionHead{} |
| 114 | for _, head := range heads { |
| 115 | if !head.Retired && head.Kind != agent.HeadKindConcurrent { |
| 116 | live = append(live, head) |
| 117 | } |
| 118 | } |
| 119 | if len(live) <= 1 { |
| 120 | headID := "" |
| 121 | if len(live) == 1 { |
| 122 | headID = live[0].ID |
| 123 | } |
| 124 | node.Source = &SessionSourceRef{HostID: localDesktopHostID, Path: node.SessionPath, HeadID: headID, SourceKey: desktopSourceKey(node.SessionPath, headID)} |
| 125 | node.Historical = true |
| 126 | return []ProjectNode{node} |
| 127 | } |
| 128 | rows := []ProjectNode{} |
| 129 | for _, head := range live { |
| 130 | row := node |
| 131 | row.Source = &SessionSourceRef{HostID: localDesktopHostID, Path: node.SessionPath, HeadID: head.ID, SourceKey: desktopSourceKey(node.SessionPath, head.ID)} |
| 132 | row.Historical, row.HistoricalBranch = true, true |
| 133 | row.Key = "source_" + row.Source.SourceKey |
| 134 | row.Turns, row.Preview = head.Turns, head.Preview |
| 135 | if !head.LastActivity.IsZero() { |
| 136 | row.LastActivityAt = head.LastActivity.UnixMilli() |
| 137 | } |
| 138 | if !head.CreatedAt.IsZero() { |
| 139 | row.CreatedAt = head.CreatedAt.UnixMilli() |
| 140 | } |
| 141 | rows = append(rows, row) |
| 142 | } |
| 143 | return rows |
| 144 | } |
| 145 |