package lib import ( "io" "time" "github.com/emersion/go-imap" "git.sr.ht/~sircmpwn/aerc/models" "git.sr.ht/~sircmpwn/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 // Ordered list of known UIDs uids []uint32 selected int bodyCallbacks map[uint32][]func(io.Reader) headerCallbacks map[uint32][]func(*types.MessageInfo) // Search/filter results results []uint32 resultIndex int filter bool // Map of uids we've asked the worker to fetch onUpdate func(store *MessageStore) // TODO: multiple onUpdate handlers pendingBodies map[uint32]interface{} pendingHeaders map[uint32]interface{} worker *types.Worker triggerNewEmail func(*models.MessageInfo) triggerDirectoryChange func() } func NewMessageStore(worker *types.Worker, dirInfo *models.DirectoryInfo, triggerNewEmail func(*models.MessageInfo), triggerDirectoryChange func()) *MessageStore { return &MessageStore{ Deleted: make(map[uint32]interface{}), DirInfo: *dirInfo, selected: 0, bodyCallbacks: make(map[uint32][]func(io.Reader)), headerCallbacks: make(map[uint32][]func(*types.MessageInfo)), pendingBodies: make(map[uint32]interface{}), pendingHeaders: make(map[uint32]interface{}), worker: worker, triggerNewEmail: triggerNewEmail, triggerDirectoryChange: triggerDirectoryChange, } } 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}, nil) } } func (store *MessageStore) FetchFull(uids []uint32, cb func(io.Reader)) { // 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(io.Reader){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 { if _, ok := store.bodyCallbacks[uid]; ok { 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 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 store.worker.PostAction(&types.FetchDirectoryContents{}, 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 update = true case *types.MessageInfo: if existing, ok := store.Messages[msg.Info.Uid]; ok && existing != nil { merge(existing, msg.Info) } else { 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) } } } 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.Content.Reader) } delete(store.bodyCallbacks, msg.Content.Uid) } } case *types.MessagesDeleted: toDelete := make(map[uint32]interface{}) for _, uid := range msg.Uids { toDelete[uid] = nil delete(store.Messages, uid) if _, ok := store.Deleted[uid]; ok { delete(store.Deleted, 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 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) update() { 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}, cb) store.update() } 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, }, cb) } store.worker.PostAction(&types.CopyMessages{ Destination: dest, Uids: uids, }, func(msg types.WorkerMessage) { switch msg.(type) { case *types.Error: cb(msg) case *types.Done: store.worker.PostAction(&types.DeleteMessages{Uids: uids}, cb) } }) store.update() } func (store *MessageStore) Read(uids []uint32, read bool, cb func(msg types.WorkerMessage)) { store.worker.PostAction(&types.ReadMessages{ Read: read, Uids: uids, }, cb) } func (store *MessageStore) Uids() []uint32 { if store.filter { return store.results } return store.uids } func (store *MessageStore) Selected() *models.MessageInfo { return store.Messages[store.Uids()[len(store.Uids())-store.selected-1]] } func (store *MessageStore) SelectedIndex() int { return store.selected } func (store *MessageStore) Select(index int) { uids := store.Uids() store.selected = index for ; store.selected < 0; store.selected = len(uids) + store.selected { /* This space deliberately left blank */ } if store.selected > len(uids) { store.selected = len(uids) } } func (store *MessageStore) NextPrev(delta int) { uids := store.Uids() if len(uids) == 0 { return } store.selected += delta if store.selected < 0 { store.selected = 0 } if store.selected >= len(uids) { store.selected = len(uids) - 1 } nextResultIndex := len(store.results) - store.resultIndex - 2*delta if nextResultIndex < 0 || nextResultIndex >= len(store.results) { return } nextResultUid := store.results[nextResultIndex] selectedUid := uids[len(uids)-store.selected-1] if nextResultUid == selectedUid { store.resultIndex += delta } } func (store *MessageStore) Next() { store.NextPrev(1) } func (store *MessageStore) Prev() { store.NextPrev(-1) } func (store *MessageStore) Search(c *imap.SearchCriteria, cb func([]uint32)) { store.worker.PostAction(&types.SearchDirectory{ Criteria: c, }, func(msg types.WorkerMessage) { switch msg := msg.(type) { case *types.SearchResults: cb(msg.Uids) } }) } func (store *MessageStore) ApplySearch(results []uint32) { store.results = results store.resultIndex = -1 store.NextResult() } func (store *MessageStore) ApplyFilter(results []uint32) { store.results = results store.filter = true store.update() } func (store *MessageStore) ApplyClear() { store.results = nil store.filter = false } 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 } for i, uid := range store.uids { if store.results[len(store.results)-store.resultIndex-1] == uid { store.Select(len(store.uids) - i - 1) break } } store.update() } func (store *MessageStore) NextResult() { store.nextPrevResult(1) } func (store *MessageStore) PrevResult() { store.nextPrevResult(-1) }