455 lines
11 KiB
Go
455 lines
11 KiB
Go
package lib
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import (
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"io"
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"time"
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"git.sr.ht/~sircmpwn/aerc/models"
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"git.sr.ht/~sircmpwn/aerc/worker/types"
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)
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// Accesses to fields must be guarded by MessageStore.Lock/Unlock
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type MessageStore struct {
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Deleted map[uint32]interface{}
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DirInfo models.DirectoryInfo
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Messages map[uint32]*models.MessageInfo
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FetchingContents bool
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// Ordered list of known UIDs
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uids []uint32
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selected int
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bodyCallbacks map[uint32][]func(io.Reader)
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headerCallbacks map[uint32][]func(*types.MessageInfo)
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// Search/filter results
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results []uint32
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resultIndex int
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filter bool
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defaultSortCriteria []*types.SortCriterion
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// Map of uids we've asked the worker to fetch
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onUpdate func(store *MessageStore) // TODO: multiple onUpdate handlers
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onUpdateDirs func()
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pendingBodies map[uint32]interface{}
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pendingHeaders map[uint32]interface{}
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worker *types.Worker
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triggerNewEmail func(*models.MessageInfo)
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triggerDirectoryChange func()
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}
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func NewMessageStore(worker *types.Worker,
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dirInfo *models.DirectoryInfo,
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defaultSortCriteria []*types.SortCriterion,
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triggerNewEmail func(*models.MessageInfo),
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triggerDirectoryChange func()) *MessageStore {
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return &MessageStore{
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Deleted: make(map[uint32]interface{}),
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DirInfo: *dirInfo,
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selected: 0,
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bodyCallbacks: make(map[uint32][]func(io.Reader)),
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headerCallbacks: make(map[uint32][]func(*types.MessageInfo)),
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defaultSortCriteria: defaultSortCriteria,
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pendingBodies: make(map[uint32]interface{}),
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pendingHeaders: make(map[uint32]interface{}),
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worker: worker,
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triggerNewEmail: triggerNewEmail,
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triggerDirectoryChange: triggerDirectoryChange,
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}
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}
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func (store *MessageStore) FetchHeaders(uids []uint32,
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cb func(*types.MessageInfo)) {
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// TODO: this could be optimized by pre-allocating toFetch and trimming it
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// at the end. In practice we expect to get most messages back in one frame.
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var toFetch []uint32
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for _, uid := range uids {
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if _, ok := store.pendingHeaders[uid]; !ok {
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toFetch = append(toFetch, uid)
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store.pendingHeaders[uid] = nil
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if cb != nil {
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if list, ok := store.headerCallbacks[uid]; ok {
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store.headerCallbacks[uid] = append(list, cb)
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} else {
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store.headerCallbacks[uid] = []func(*types.MessageInfo){cb}
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}
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}
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}
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}
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if len(toFetch) > 0 {
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store.worker.PostAction(&types.FetchMessageHeaders{Uids: toFetch}, nil)
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}
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}
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func (store *MessageStore) FetchFull(uids []uint32, cb func(io.Reader)) {
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// TODO: this could be optimized by pre-allocating toFetch and trimming it
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// at the end. In practice we expect to get most messages back in one frame.
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var toFetch []uint32
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for _, uid := range uids {
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if _, ok := store.pendingBodies[uid]; !ok {
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toFetch = append(toFetch, uid)
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store.pendingBodies[uid] = nil
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if cb != nil {
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if list, ok := store.bodyCallbacks[uid]; ok {
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store.bodyCallbacks[uid] = append(list, cb)
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} else {
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store.bodyCallbacks[uid] = []func(io.Reader){cb}
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}
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}
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}
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}
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if len(toFetch) > 0 {
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store.worker.PostAction(&types.FetchFullMessages{
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Uids: toFetch,
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}, func(msg types.WorkerMessage) {
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switch msg.(type) {
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case *types.Error:
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for _, uid := range toFetch {
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delete(store.bodyCallbacks, uid)
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}
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}
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})
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}
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}
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func (store *MessageStore) FetchBodyPart(
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uid uint32, part []int, cb func(io.Reader)) {
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store.worker.PostAction(&types.FetchMessageBodyPart{
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Uid: uid,
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Part: part,
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}, func(resp types.WorkerMessage) {
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msg, ok := resp.(*types.MessageBodyPart)
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if !ok {
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return
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}
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cb(msg.Part.Reader)
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})
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}
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func merge(to *models.MessageInfo, from *models.MessageInfo) {
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if from.BodyStructure != nil {
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to.BodyStructure = from.BodyStructure
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}
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if from.Envelope != nil {
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to.Envelope = from.Envelope
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}
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to.Flags = from.Flags
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if from.Size != 0 {
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to.Size = from.Size
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}
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var zero time.Time
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if from.InternalDate != zero {
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to.InternalDate = from.InternalDate
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}
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}
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func (store *MessageStore) Update(msg types.WorkerMessage) {
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update := false
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directoryChange := false
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switch msg := msg.(type) {
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case *types.DirectoryInfo:
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store.DirInfo = *msg.Info
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store.worker.PostAction(&types.FetchDirectoryContents{
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SortCriteria: store.defaultSortCriteria,
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}, nil)
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store.FetchingContents = true
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update = true
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case *types.DirectoryContents:
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newMap := make(map[uint32]*models.MessageInfo)
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for _, uid := range msg.Uids {
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if msg, ok := store.Messages[uid]; ok {
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newMap[uid] = msg
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} else {
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newMap[uid] = nil
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directoryChange = true
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}
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}
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store.Messages = newMap
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store.uids = msg.Uids
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store.FetchingContents = false
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update = true
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case *types.MessageInfo:
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if existing, ok := store.Messages[msg.Info.Uid]; ok && existing != nil {
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merge(existing, msg.Info)
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} else {
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store.Messages[msg.Info.Uid] = msg.Info
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}
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seen := false
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recent := false
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for _, flag := range msg.Info.Flags {
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if flag == models.RecentFlag {
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recent = true
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} else if flag == models.SeenFlag {
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seen = true
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}
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}
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if !seen && recent {
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store.triggerNewEmail(msg.Info)
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}
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if _, ok := store.pendingHeaders[msg.Info.Uid]; msg.Info.Envelope != nil && ok {
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delete(store.pendingHeaders, msg.Info.Uid)
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if cbs, ok := store.headerCallbacks[msg.Info.Uid]; ok {
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for _, cb := range cbs {
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cb(msg)
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}
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}
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}
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update = true
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case *types.FullMessage:
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if _, ok := store.pendingBodies[msg.Content.Uid]; ok {
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delete(store.pendingBodies, msg.Content.Uid)
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if cbs, ok := store.bodyCallbacks[msg.Content.Uid]; ok {
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for _, cb := range cbs {
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cb(msg.Content.Reader)
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}
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delete(store.bodyCallbacks, msg.Content.Uid)
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}
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}
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case *types.MessagesDeleted:
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toDelete := make(map[uint32]interface{})
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for _, uid := range msg.Uids {
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toDelete[uid] = nil
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delete(store.Messages, uid)
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delete(store.Deleted, uid)
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}
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uids := make([]uint32, len(store.uids)-len(msg.Uids))
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j := 0
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for _, uid := range store.uids {
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if _, deleted := toDelete[uid]; !deleted && j < len(uids) {
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uids[j] = uid
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j += 1
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}
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}
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store.uids = uids
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update = true
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}
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if update {
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store.update()
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}
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if directoryChange && store.triggerDirectoryChange != nil {
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store.triggerDirectoryChange()
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}
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}
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func (store *MessageStore) OnUpdate(fn func(store *MessageStore)) {
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store.onUpdate = fn
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}
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func (store *MessageStore) OnUpdateDirs(fn func()) {
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store.onUpdateDirs = fn
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}
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func (store *MessageStore) update() {
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if store.onUpdate != nil {
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store.onUpdate(store)
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}
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if store.onUpdateDirs != nil {
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store.onUpdateDirs()
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}
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}
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func (store *MessageStore) Delete(uids []uint32,
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cb func(msg types.WorkerMessage)) {
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for _, uid := range uids {
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store.Deleted[uid] = nil
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}
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store.worker.PostAction(&types.DeleteMessages{Uids: uids}, cb)
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store.update()
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}
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func (store *MessageStore) Copy(uids []uint32, dest string, createDest bool,
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cb func(msg types.WorkerMessage)) {
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if createDest {
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store.worker.PostAction(&types.CreateDirectory{
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Directory: dest,
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Quiet: true,
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}, cb)
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}
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store.worker.PostAction(&types.CopyMessages{
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Destination: dest,
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Uids: uids,
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}, cb)
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}
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func (store *MessageStore) Move(uids []uint32, dest string, createDest bool,
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cb func(msg types.WorkerMessage)) {
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for _, uid := range uids {
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store.Deleted[uid] = nil
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}
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if createDest {
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store.worker.PostAction(&types.CreateDirectory{
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Directory: dest,
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Quiet: true,
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}, cb)
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}
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store.worker.PostAction(&types.CopyMessages{
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Destination: dest,
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Uids: uids,
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}, func(msg types.WorkerMessage) {
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switch msg.(type) {
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case *types.Error:
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cb(msg)
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case *types.Done:
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store.worker.PostAction(&types.DeleteMessages{Uids: uids}, cb)
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}
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})
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store.update()
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}
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func (store *MessageStore) Read(uids []uint32, read bool,
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cb func(msg types.WorkerMessage)) {
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store.worker.PostAction(&types.ReadMessages{
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Read: read,
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Uids: uids,
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}, cb)
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}
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func (store *MessageStore) Uids() []uint32 {
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if store.filter {
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return store.results
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}
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return store.uids
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}
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func (store *MessageStore) Selected() *models.MessageInfo {
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return store.Messages[store.Uids()[len(store.Uids())-store.selected-1]]
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}
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func (store *MessageStore) SelectedIndex() int {
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return store.selected
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}
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func (store *MessageStore) Select(index int) {
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uids := store.Uids()
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store.selected = index
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for ; store.selected < 0; store.selected = len(uids) + store.selected {
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/* This space deliberately left blank */
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}
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if store.selected > len(uids) {
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store.selected = len(uids)
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}
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}
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func (store *MessageStore) NextPrev(delta int) {
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uids := store.Uids()
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if len(uids) == 0 {
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return
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}
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store.selected += delta
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if store.selected < 0 {
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store.selected = 0
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}
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if store.selected >= len(uids) {
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store.selected = len(uids) - 1
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}
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nextResultIndex := len(store.results) - store.resultIndex - 2*delta
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if nextResultIndex < 0 || nextResultIndex >= len(store.results) {
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return
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}
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nextResultUid := store.results[nextResultIndex]
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selectedUid := uids[len(uids)-store.selected-1]
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if nextResultUid == selectedUid {
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store.resultIndex += delta
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}
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}
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func (store *MessageStore) Next() {
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store.NextPrev(1)
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}
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func (store *MessageStore) Prev() {
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store.NextPrev(-1)
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}
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func (store *MessageStore) Search(args []string, cb func([]uint32)) {
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store.worker.PostAction(&types.SearchDirectory{
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Argv: args,
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}, func(msg types.WorkerMessage) {
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switch msg := msg.(type) {
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case *types.SearchResults:
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cb(msg.Uids)
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}
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})
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}
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func (store *MessageStore) ApplySearch(results []uint32) {
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store.results = results
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store.resultIndex = -1
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store.NextResult()
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}
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func (store *MessageStore) ApplyFilter(results []uint32) {
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store.results = results
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store.filter = true
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store.update()
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}
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func (store *MessageStore) ApplyClear() {
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store.results = nil
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store.filter = false
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}
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func (store *MessageStore) nextPrevResult(delta int) {
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if len(store.results) == 0 {
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return
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}
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store.resultIndex += delta
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if store.resultIndex >= len(store.results) {
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store.resultIndex = 0
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}
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if store.resultIndex < 0 {
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store.resultIndex = len(store.results) - 1
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}
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for i, uid := range store.uids {
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if store.results[len(store.results)-store.resultIndex-1] == uid {
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store.Select(len(store.uids) - i - 1)
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break
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}
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}
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store.update()
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}
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func (store *MessageStore) NextResult() {
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store.nextPrevResult(1)
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}
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func (store *MessageStore) PrevResult() {
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store.nextPrevResult(-1)
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}
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func (store *MessageStore) ModifyLabels(uids []uint32, add, remove []string,
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cb func(msg types.WorkerMessage)) {
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store.worker.PostAction(&types.ModifyLabels{
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Uids: uids,
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Add: add,
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Remove: remove,
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}, cb)
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}
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func (store *MessageStore) Sort(criteria []*types.SortCriterion, cb func()) {
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store.worker.PostAction(&types.FetchDirectoryContents{
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SortCriteria: criteria,
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}, func(msg types.WorkerMessage) {
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cb()
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})
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}
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