| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "encoding/json" |
| 5 | "errors" |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | |
| 9 | "reasonix/internal/fileutil" |
| 10 | ) |
| 11 | |
| 12 | var errTabsSnapshotChanged = errors.New("desktop tabs changed during startup reconciliation") |
| 13 | |
| 14 | func (a *App) loadTabsForRestore() (desktopTabsFile, uint64) { |
| 15 | version := a.tabsSnapshotVersion() |
| 16 | file := loadTabsFile() |
| 17 | a.rememberTabsFileExtra(file.extra) |
| 18 | return file, version |
| 19 | } |
| 20 | |
| 21 | // saveTabsWrite writes the tab snapshot outside a.mu. tabsSaveMu serializes |
| 22 | // writes because every save shares one destination and fixed temporary path. |
| 23 | func (a *App) saveTabsWrite(dir string, entries []desktopTabEntry, activeID string, version uint64) { |
| 24 | a.tabsSaveMu.Lock() |
| 25 | defer a.tabsSaveMu.Unlock() |
| 26 | if version < a.tabsLastWrittenVersion { |
| 27 | return |
| 28 | } |
| 29 | localIDs := make([]string, 0, len(entries)) |
| 30 | for _, entry := range entries { |
| 31 | localIDs = append(localIDs, entry.ID) |
| 32 | } |
| 33 | remoteEntries, remoteOrder, tabOrder, remoteActive := a.remoteTabsFileEntries(localIDs) |
| 34 | if remoteActive != "" { |
| 35 | activeID = remoteActive |
| 36 | } |
| 37 | file := desktopTabsFile{ |
| 38 | Tabs: entries, ActiveTab: activeID, RemoteTabs: remoteEntries, |
| 39 | RemoteTabOrder: remoteOrder, TabOrder: tabOrder, |
| 40 | extra: cloneDesktopJSONFields(a.tabsFileExtra), |
| 41 | } |
| 42 | _ = a.writeTabsFileLocked(dir, file, version) |
| 43 | } |
| 44 | |
| 45 | func (a *App) rememberTabsFileExtra(extra map[string]json.RawMessage) { |
| 46 | a.tabsSaveMu.Lock() |
| 47 | a.tabsFileExtra = cloneDesktopJSONFields(extra) |
| 48 | a.tabsSaveMu.Unlock() |
| 49 | } |
| 50 | |
| 51 | func (a *App) tabsSnapshotVersion() uint64 { |
| 52 | a.mu.RLock() |
| 53 | defer a.mu.RUnlock() |
| 54 | return a.tabsSaveVersion |
| 55 | } |
| 56 | |
| 57 | func (a *App) tabsSnapshotCurrent(version uint64) bool { |
| 58 | a.mu.RLock() |
| 59 | defer a.mu.RUnlock() |
| 60 | return a.tabsSaveVersion == version |
| 61 | } |
| 62 | |
| 63 | func (a *App) persistReconciledTabsFile(file desktopTabsFile, expectedVersion uint64) (uint64, error) { |
| 64 | a.mu.Lock() |
| 65 | if a.tabsSaveVersion != expectedVersion { |
| 66 | a.mu.Unlock() |
| 67 | return 0, errTabsSnapshotChanged |
| 68 | } |
| 69 | a.tabsSaveVersion++ |
| 70 | version := a.tabsSaveVersion |
| 71 | a.mu.Unlock() |
| 72 | |
| 73 | a.tabsSaveMu.Lock() |
| 74 | defer a.tabsSaveMu.Unlock() |
| 75 | if version < a.tabsLastWrittenVersion { |
| 76 | return 0, errTabsSnapshotChanged |
| 77 | } |
| 78 | file.extra = cloneDesktopJSONFields(a.tabsFileExtra) |
| 79 | if err := a.writeTabsFileLocked(desktopConfigDir(), file, version); err != nil { |
| 80 | return version, err |
| 81 | } |
| 82 | return version, nil |
| 83 | } |
| 84 | |
| 85 | // writeTabsFileLocked writes an already-reconciled snapshot under tabsSaveMu. |
| 86 | func (a *App) writeTabsFileLocked(dir string, file desktopTabsFile, version uint64) error { |
| 87 | if err := os.MkdirAll(dir, 0o755); err != nil { |
| 88 | return err |
| 89 | } |
| 90 | body, err := json.MarshalIndent(file, "", " ") |
| 91 | if err != nil { |
| 92 | return err |
| 93 | } |
| 94 | path := filepath.Join(dir, tabsFileName) |
| 95 | tmp := path + ".tmp" |
| 96 | if err := os.WriteFile(tmp, body, 0o644); err != nil { |
| 97 | return err |
| 98 | } |
| 99 | if err := fileutil.ReplaceFile(tmp, path); err != nil { |
| 100 | return err |
| 101 | } |
| 102 | a.tabsLastWrittenVersion = version |
| 103 | return nil |
| 104 | } |
| 105 |