package lib
import (
"github.com/emersion/go-imap"
"git.sr.ht/~sircmpwn/aerc2/worker/types"
)
type MessageStore struct {
DirInfo types.DirectoryInfo
Messages map[uint32]*types.MessageInfo
// Ordered list of known UIDs
Uids []uint32
// 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
}
func NewMessageStore(worker *types.Worker,
dirInfo *types.DirectoryInfo) *MessageStore {
return &MessageStore{
DirInfo: *dirInfo,
pendingBodies: make(map[uint32]interface{}),
pendingHeaders: make(map[uint32]interface{}),
worker: worker,
}
}
func (store *MessageStore) FetchHeaders(uids []uint32) {
// 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 imap.SeqSet
for _, uid := range uids {
if _, ok := store.pendingHeaders[uid]; !ok {
toFetch.AddNum(uint32(uid))
store.pendingHeaders[uid] = nil
}
}
if !toFetch.Empty() {
store.worker.PostAction(&types.FetchMessageHeaders{
Uids: toFetch,
}, nil)
}
}
func (store *MessageStore) Update(msg types.WorkerMessage) {
update := false
switch msg := msg.(type) {
case *types.DirectoryInfo:
store.DirInfo = *msg
update = true
case *types.DirectoryContents:
newMap := make(map[uint32]*types.MessageInfo)
for _, uid := range msg.Uids {
if msg, ok := store.Messages[uid]; ok {
newMap[uid] = msg
} else {
newMap[uid] = nil
}
}
store.Messages = newMap
store.Uids = msg.Uids
update = true
case *types.MessageInfo:
// TODO: merge message info into existing record, if applicable
store.Messages[msg.Uid] = msg
if _, ok := store.pendingHeaders[msg.Uid]; msg.Envelope != nil && ok {
delete(store.pendingHeaders, msg.Uid)
}
update = true
case *types.MessagesDeleted:
toDelete := make(map[uint32]interface{})
for _, uid := range msg.Uids {
toDelete[uid] = nil
delete(store.Messages, uid)
}
uids := make([]uint32, len(store.Uids)-len(msg.Uids))
j := 0
for i, uid := range store.Uids {
if _, deleted := toDelete[uid]; !deleted {
uids[j] = store.Uids[i]
j += 1
}
}
store.Uids = uids
update = true
}
if update && store.onUpdate != nil {
store.onUpdate(store)
}
}
func (store *MessageStore) OnUpdate(fn func(store *MessageStore)) {
store.onUpdate = fn
}
func (store *MessageStore) Delete(uids []uint32) {
var set imap.SeqSet
for _, uid := range uids {
set.AddNum(uid)
}
store.worker.PostAction(&types.DeleteMessages{Uids: set}, nil)
}