package lib import ( "io" "sync" "time" "git.sr.ht/~rjarry/aerc/lib/sort" "git.sr.ht/~rjarry/aerc/logging" "git.sr.ht/~rjarry/aerc/models" "git.sr.ht/~rjarry/aerc/worker/types" ) // Accesses to fields must be guarded by MessageStore.Lock/Unlock type MessageStore struct { Deleted map[uint32]interface{} DirInfo models.DirectoryInfo Messages map[uint32]*models.MessageInfo Sorting bool // Ordered list of known UIDs uids []uint32 threads []*types.Thread selectedUid uint32 reselect *models.MessageInfo bodyCallbacks map[uint32][]func(*types.FullMessage) headerCallbacks map[uint32][]func(*types.MessageInfo) // marking marked map[uint32]struct{} lastMarked map[uint32]struct{} visualStartUid uint32 visualMarkMode bool // Search/filter results results []uint32 resultIndex int filter []string sortCriteria []*types.SortCriterion threadedView bool buildThreads bool builder *ThreadBuilder // Map of uids we've asked the worker to fetch onUpdate func(store *MessageStore) // TODO: multiple onUpdate handlers onFilterChange func(store *MessageStore) onUpdateDirs func() pendingBodies map[uint32]interface{} pendingHeaders map[uint32]interface{} worker *types.Worker triggerNewEmail func(*models.MessageInfo) triggerDirectoryChange func() threadBuilderDebounce *time.Timer threadBuilderDelay time.Duration threadsMutex sync.Mutex } const MagicUid = 0xFFFFFFFF func NewMessageStore(worker *types.Worker, dirInfo *models.DirectoryInfo, defaultSortCriteria []*types.SortCriterion, thread bool, clientThreads bool, clientThreadsDelay time.Duration, triggerNewEmail func(*models.MessageInfo), triggerDirectoryChange func(), ) *MessageStore { if !dirInfo.Caps.Thread { clientThreads = true } return &MessageStore{ Deleted: make(map[uint32]interface{}), DirInfo: *dirInfo, Messages: make(map[uint32]*models.MessageInfo), selectedUid: MagicUid, marked: make(map[uint32]struct{}), bodyCallbacks: make(map[uint32][]func(*types.FullMessage)), headerCallbacks: make(map[uint32][]func(*types.MessageInfo)), threadedView: thread, buildThreads: clientThreads, filter: []string{"filter"}, sortCriteria: defaultSortCriteria, pendingBodies: make(map[uint32]interface{}), pendingHeaders: make(map[uint32]interface{}), worker: worker, triggerNewEmail: triggerNewEmail, triggerDirectoryChange: triggerDirectoryChange, threadBuilderDelay: clientThreadsDelay, } } func (store *MessageStore) FetchHeaders(uids []uint32, cb func(*types.MessageInfo), ) { // TODO: this could be optimized by pre-allocating toFetch and trimming it // at the end. In practice we expect to get most messages back in one frame. var toFetch []uint32 for _, uid := range uids { if _, ok := store.pendingHeaders[uid]; !ok { toFetch = append(toFetch, uid) store.pendingHeaders[uid] = nil if cb != nil { if list, ok := store.headerCallbacks[uid]; ok { store.headerCallbacks[uid] = append(list, cb) } else { store.headerCallbacks[uid] = []func(*types.MessageInfo){cb} } } } } if len(toFetch) > 0 { store.worker.PostAction(&types.FetchMessageHeaders{Uids: toFetch}, func(msg types.WorkerMessage) { switch msg.(type) { case *types.Error: for _, uid := range toFetch { delete(store.pendingHeaders, uid) delete(store.headerCallbacks, uid) } } }) } } func (store *MessageStore) FetchFull(uids []uint32, cb func(*types.FullMessage)) { // TODO: this could be optimized by pre-allocating toFetch and trimming it // at the end. In practice we expect to get most messages back in one frame. var toFetch []uint32 for _, uid := range uids { if _, ok := store.pendingBodies[uid]; !ok { toFetch = append(toFetch, uid) store.pendingBodies[uid] = nil if cb != nil { if list, ok := store.bodyCallbacks[uid]; ok { store.bodyCallbacks[uid] = append(list, cb) } else { store.bodyCallbacks[uid] = []func(*types.FullMessage){cb} } } } } if len(toFetch) > 0 { store.worker.PostAction(&types.FetchFullMessages{ Uids: toFetch, }, func(msg types.WorkerMessage) { switch msg.(type) { case *types.Error: for _, uid := range toFetch { delete(store.pendingBodies, uid) delete(store.bodyCallbacks, uid) } } }) } } func (store *MessageStore) FetchBodyPart(uid uint32, part []int, cb func(io.Reader)) { store.worker.PostAction(&types.FetchMessageBodyPart{ Uid: uid, Part: part, }, func(resp types.WorkerMessage) { msg, ok := resp.(*types.MessageBodyPart) if !ok { return } cb(msg.Part.Reader) }) } func merge(to *models.MessageInfo, from *models.MessageInfo) { if from.BodyStructure != nil { to.BodyStructure = from.BodyStructure } if from.Envelope != nil { to.Envelope = from.Envelope } to.Flags = from.Flags to.Labels = from.Labels if from.Size != 0 { to.Size = from.Size } var zero time.Time if from.InternalDate != zero { to.InternalDate = from.InternalDate } } func (store *MessageStore) Update(msg types.WorkerMessage) { update := false directoryChange := false switch msg := msg.(type) { case *types.DirectoryInfo: store.DirInfo = *msg.Info if !msg.SkipSort { store.Sort(store.sortCriteria, nil) } update = true case *types.DirectoryContents: newMap := make(map[uint32]*models.MessageInfo) for _, uid := range msg.Uids { if msg, ok := store.Messages[uid]; ok { newMap[uid] = msg } else { newMap[uid] = nil directoryChange = true } } store.Messages = newMap store.uids = msg.Uids store.checkMark() update = true case *types.DirectoryThreaded: var uids []uint32 newMap := make(map[uint32]*models.MessageInfo) for i := len(msg.Threads) - 1; i >= 0; i-- { msg.Threads[i].Walk(func(t *types.Thread, level int, currentErr error) error { uid := t.Uid uids = append([]uint32{uid}, uids...) if msg, ok := store.Messages[uid]; ok { newMap[uid] = msg } else { newMap[uid] = nil directoryChange = true } return nil }) } store.Messages = newMap store.uids = uids store.checkMark() store.threads = msg.Threads update = true case *types.MessageInfo: if existing, ok := store.Messages[msg.Info.Uid]; ok && existing != nil { merge(existing, msg.Info) } else { if msg.Info.Envelope != nil { store.Messages[msg.Info.Uid] = msg.Info } } seen := false recent := false for _, flag := range msg.Info.Flags { if flag == models.RecentFlag { recent = true } else if flag == models.SeenFlag { seen = true } } if !seen && recent { store.triggerNewEmail(msg.Info) } if _, ok := store.pendingHeaders[msg.Info.Uid]; msg.Info.Envelope != nil && ok { delete(store.pendingHeaders, msg.Info.Uid) if cbs, ok := store.headerCallbacks[msg.Info.Uid]; ok { for _, cb := range cbs { cb(msg) } } } if store.builder != nil { store.builder.Update(msg.Info) } update = true case *types.FullMessage: if _, ok := store.pendingBodies[msg.Content.Uid]; ok { delete(store.pendingBodies, msg.Content.Uid) if cbs, ok := store.bodyCallbacks[msg.Content.Uid]; ok { for _, cb := range cbs { cb(msg) } delete(store.bodyCallbacks, msg.Content.Uid) } } case *types.MessagesDeleted: if len(store.uids) < len(msg.Uids) { update = true break } toDelete := make(map[uint32]interface{}) for _, uid := range msg.Uids { toDelete[uid] = nil delete(store.Messages, uid) delete(store.Deleted, uid) delete(store.marked, uid) } uids := make([]uint32, len(store.uids)-len(msg.Uids)) j := 0 for _, uid := range store.uids { if _, deleted := toDelete[uid]; !deleted && j < len(uids) { uids[j] = uid j += 1 } } store.uids = uids var newResults []uint32 for _, res := range store.results { if _, deleted := toDelete[res]; !deleted { newResults = append(newResults, res) } } store.results = newResults for _, thread := range store.Threads() { thread.Walk(func(t *types.Thread, _ int, _ error) error { if _, deleted := toDelete[t.Uid]; deleted { t.Deleted = true } return nil }) } update = true } if update { store.update() } if directoryChange && store.triggerDirectoryChange != nil { store.triggerDirectoryChange() } } func (store *MessageStore) OnUpdate(fn func(store *MessageStore)) { store.onUpdate = fn } func (store *MessageStore) OnFilterChange(fn func(store *MessageStore)) { store.onFilterChange = fn } func (store *MessageStore) OnUpdateDirs(fn func()) { store.onUpdateDirs = fn } func (store *MessageStore) update() { if store.onUpdate != nil { store.onUpdate(store) } if store.onUpdateDirs != nil { store.onUpdateDirs() } if store.BuildThreads() && store.ThreadedView() { store.runThreadBuilder() } } func (store *MessageStore) SetThreadedView(thread bool) { store.threadedView = thread if store.buildThreads { if store.threadedView { store.runThreadBuilder() } return } store.Sort(store.sortCriteria, nil) } func (store *MessageStore) Threads() []*types.Thread { store.threadsMutex.Lock() defer store.threadsMutex.Unlock() return store.threads } func (store *MessageStore) ThreadedView() bool { return store.threadedView } func (store *MessageStore) BuildThreads() bool { return store.buildThreads } func (store *MessageStore) runThreadBuilder() { if store.builder == nil { store.builder = NewThreadBuilder() for _, msg := range store.Messages { store.builder.Update(msg) } } if store.threadBuilderDebounce != nil { if store.threadBuilderDebounce.Stop() { logging.Infof("thread builder debounced") } } store.threadBuilderDebounce = time.AfterFunc(store.threadBuilderDelay, func() { // temporarily deactiviate the selector in the message list by // setting SelectedUid to the MagicUid oldUid := store.SelectedUid() store.Select(MagicUid) // Get the current index (we want to stay at that position in // the updated uid list to provide a similar scrolling // experience to the user as in the regular view idx := store.FindIndexByUid(oldUid) // build new threads th := store.builder.Threads(store.uids) // try to select the same index in the updated uid list; if // index is out of bound, stay at the selected message rebuildUids := store.builder.Uids() if idx >= 0 && idx < len(rebuildUids) { store.Select(rebuildUids[idx]) } else { store.Select(oldUid) } // save local threads to the message store variable store.threadsMutex.Lock() store.threads = th store.threadsMutex.Unlock() // invalidate message list so that it is redrawn with the new // threads and selected message if store.onUpdate != nil { store.onUpdate(store) } }) } func (store *MessageStore) Delete(uids []uint32, cb func(msg types.WorkerMessage), ) { for _, uid := range uids { store.Deleted[uid] = nil } store.worker.PostAction(&types.DeleteMessages{Uids: uids}, func(msg types.WorkerMessage) { switch msg.(type) { case *types.Error: store.revertDeleted(uids) } cb(msg) }) } func (store *MessageStore) revertDeleted(uids []uint32) { for _, uid := range uids { delete(store.Deleted, uid) } } func (store *MessageStore) Copy(uids []uint32, dest string, createDest bool, cb func(msg types.WorkerMessage), ) { if createDest { store.worker.PostAction(&types.CreateDirectory{ Directory: dest, Quiet: true, }, cb) } store.worker.PostAction(&types.CopyMessages{ Destination: dest, Uids: uids, }, cb) } func (store *MessageStore) Move(uids []uint32, dest string, createDest bool, cb func(msg types.WorkerMessage), ) { for _, uid := range uids { store.Deleted[uid] = nil } if createDest { store.worker.PostAction(&types.CreateDirectory{ Directory: dest, Quiet: true, }, nil) // quiet doesn't return an error, don't want the done cb here } store.worker.PostAction(&types.CopyMessages{ Destination: dest, Uids: uids, }, func(msg types.WorkerMessage) { switch msg.(type) { case *types.Error: store.revertDeleted(uids) cb(msg) case *types.Done: store.Delete(uids, cb) } }) } func (store *MessageStore) Flag(uids []uint32, flag models.Flag, enable bool, cb func(msg types.WorkerMessage), ) { store.worker.PostAction(&types.FlagMessages{ Enable: enable, Flag: flag, Uids: uids, }, cb) } func (store *MessageStore) Answered(uids []uint32, answered bool, cb func(msg types.WorkerMessage), ) { store.worker.PostAction(&types.AnsweredMessages{ Answered: answered, Uids: uids, }, cb) } func (store *MessageStore) Uids() []uint32 { if store.ThreadedView() && store.builder != nil { if uids := store.builder.Uids(); len(uids) > 0 { return uids } } return store.uids } func (store *MessageStore) Selected() *models.MessageInfo { return store.Messages[store.selectedUid] } func (store *MessageStore) SelectedUid() uint32 { if store.selectedUid == MagicUid && len(store.Uids()) > 0 { uids := store.Uids() store.selectedUid = uids[len(uids)-1] } return store.selectedUid } func (store *MessageStore) Select(uid uint32) { store.selectedUid = uid store.updateVisual() } // Mark sets the marked state on a MessageInfo func (store *MessageStore) Mark(uid uint32) { if store.visualMarkMode { // visual mode has override, bogus input from user return } store.marked[uid] = struct{}{} } // Unmark removes the marked state on a MessageInfo func (store *MessageStore) Unmark(uid uint32) { if store.visualMarkMode { // user probably wanted to clear the visual marking store.ClearVisualMark() return } delete(store.marked, uid) } func (store *MessageStore) Remark() { store.marked = store.lastMarked } // ToggleMark toggles the marked state on a MessageInfo func (store *MessageStore) ToggleMark(uid uint32) { if store.visualMarkMode { // visual mode has override, bogus input from user return } if store.IsMarked(uid) { store.Unmark(uid) } else { store.Mark(uid) } } // resetMark removes the marking from all messages func (store *MessageStore) resetMark() { store.lastMarked = store.marked store.marked = make(map[uint32]struct{}) } // checkMark checks that no stale uids remain marked func (store *MessageStore) checkMark() { for mark := range store.marked { present := false for _, uid := range store.uids { if mark == uid { present = true break } } if !present { delete(store.marked, mark) } } } // IsMarked checks whether a MessageInfo has been marked func (store *MessageStore) IsMarked(uid uint32) bool { _, marked := store.marked[uid] return marked } // ToggleVisualMark enters or leaves the visual marking mode func (store *MessageStore) ToggleVisualMark() { store.visualMarkMode = !store.visualMarkMode switch store.visualMarkMode { case true: // just entered visual mode, reset whatever marking was already done store.resetMark() store.visualStartUid = store.Selected().Uid store.marked[store.visualStartUid] = struct{}{} case false: // visual mode ended, nothing to do return } } // ClearVisualMark leaves the visual marking mode and resets any marking func (store *MessageStore) ClearVisualMark() { store.resetMark() store.visualMarkMode = false store.visualStartUid = 0 } // Marked returns the uids of all marked messages func (store *MessageStore) Marked() []uint32 { marked := make([]uint32, len(store.marked)) i := 0 for uid := range store.marked { marked[i] = uid i++ } return marked } func (store *MessageStore) updateVisual() { if !store.visualMarkMode { // nothing to do return } startIdx := store.visualStartIdx() if startIdx < 0 { // something deleted the startuid, abort the marking process store.ClearVisualMark() return } selectedIdx := store.FindIndexByUid(store.SelectedUid()) if selectedIdx < 0 { store.ClearVisualMark() return } var visUids []uint32 if selectedIdx > startIdx { visUids = store.Uids()[startIdx : selectedIdx+1] } else { visUids = store.Uids()[selectedIdx : startIdx+1] } store.resetMark() for _, uid := range visUids { store.marked[uid] = struct{}{} } missing := make([]uint32, 0) for _, uid := range visUids { if msg := store.Messages[uid]; msg == nil { missing = append(missing, uid) } } store.FetchHeaders(missing, nil) } func (store *MessageStore) NextPrev(delta int) { uids := store.Uids() if len(uids) == 0 { return } uid := store.SelectedUid() newIdx := store.FindIndexByUid(uid) if newIdx < 0 { store.Select(uids[len(uids)-1]) return } newIdx -= delta if newIdx >= len(uids) { newIdx = len(uids) - 1 } else if newIdx < 0 { newIdx = 0 } store.Select(uids[newIdx]) store.updateVisual() nextResultIndex := len(store.results) - store.resultIndex - 2*delta if nextResultIndex < 0 || nextResultIndex >= len(store.results) { return } nextResultUid := store.results[nextResultIndex] if nextResultUid == store.SelectedUid() { store.resultIndex += delta } } func (store *MessageStore) Next() { store.NextPrev(1) } func (store *MessageStore) Prev() { store.NextPrev(-1) } func (store *MessageStore) Search(args []string, cb func([]uint32)) { store.worker.PostAction(&types.SearchDirectory{ Argv: args, }, func(msg types.WorkerMessage) { switch msg := msg.(type) { case *types.SearchResults: allowedUids := store.Uids() uids := make([]uint32, 0, len(msg.Uids)) for _, uid := range msg.Uids { for _, uidCheck := range allowedUids { if uid == uidCheck { uids = append(uids, uid) break } } } sort.SortBy(uids, allowedUids) cb(uids) } }) } func (store *MessageStore) ApplySearch(results []uint32) { store.results = results store.resultIndex = -1 store.NextResult() } func (store *MessageStore) SetFilter(args []string) { store.filter = append(store.filter, args...) } func (store *MessageStore) ApplyClear() { store.filter = []string{"filter"} store.results = nil if store.onFilterChange != nil { store.onFilterChange(store) } store.Sort(nil, nil) } func (store *MessageStore) nextPrevResult(delta int) { if len(store.results) == 0 { return } store.resultIndex += delta if store.resultIndex >= len(store.results) { store.resultIndex = 0 } if store.resultIndex < 0 { store.resultIndex = len(store.results) - 1 } store.Select(store.results[len(store.results)-store.resultIndex-1]) store.update() } func (store *MessageStore) NextResult() { store.nextPrevResult(1) } func (store *MessageStore) PrevResult() { store.nextPrevResult(-1) } func (store *MessageStore) ModifyLabels(uids []uint32, add, remove []string, cb func(msg types.WorkerMessage), ) { store.worker.PostAction(&types.ModifyLabels{ Uids: uids, Add: add, Remove: remove, }, cb) } func (store *MessageStore) Sort(criteria []*types.SortCriterion, cb func(types.WorkerMessage)) { store.sortCriteria = criteria store.Sorting = true handle_return := func(msg types.WorkerMessage) { store.Sorting = false if cb != nil { cb(msg) } } if store.threadedView && !store.buildThreads { store.worker.PostAction(&types.FetchDirectoryThreaded{ SortCriteria: criteria, FilterCriteria: store.filter, }, handle_return) } else { store.worker.PostAction(&types.FetchDirectoryContents{ SortCriteria: criteria, FilterCriteria: store.filter, }, handle_return) } } func (store *MessageStore) GetCurrentSortCriteria() []*types.SortCriterion { return store.sortCriteria } // returns the index of needle in haystack or -1 if not found func (store *MessageStore) visualStartIdx() int { for idx, u := range store.Uids() { if u == store.visualStartUid { return idx } } return -1 } // FindIndexByUid returns the index in store.Uids() or -1 if not found func (store *MessageStore) FindIndexByUid(uid uint32) int { for idx, u := range store.Uids() { if u == uid { return idx } } return -1 } // Capabilities returns a models.Capabilities struct or nil if not available func (store *MessageStore) Capabilities() *models.Capabilities { return store.DirInfo.Caps }