1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
package lib
import (
"io"
"sync"
"time"
"github.com/emersion/go-imap"
"git.sr.ht/~sircmpwn/aerc2/worker/types"
)
// Accesses to fields must be guarded by MessageStore.Lock/Unlock
type MessageStore struct {
sync.Mutex
Deleted map[uint32]interface{}
DirInfo types.DirectoryInfo
Messages map[uint32]*types.MessageInfo
// Ordered list of known UIDs
Uids []uint32
bodyCallbacks map[uint32][]func(io.Reader)
headerCallbacks map[uint32][]func(*types.MessageInfo)
// 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{
Deleted: make(map[uint32]interface{}),
DirInfo: *dirInfo,
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,
}
}
func (store *MessageStore) FetchHeaders(uids []uint32,
cb func(*types.MessageInfo)) {
store.Lock()
defer store.Unlock()
// 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 cb != nil {
if list, ok := store.headerCallbacks[uid]; ok {
store.headerCallbacks[uid] = append(list, cb)
} else {
store.headerCallbacks[uid] = []func(*types.MessageInfo){cb}
}
}
}
}
if !toFetch.Empty() {
store.worker.PostAction(&types.FetchMessageHeaders{Uids: toFetch}, nil)
}
}
func (store *MessageStore) FetchFull(uids []uint32, cb func(io.Reader)) {
store.Lock()
defer store.Unlock()
// 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.pendingBodies[uid]; !ok {
toFetch.AddNum(uint32(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 !toFetch.Empty() {
store.worker.PostAction(&types.FetchFullMessages{Uids: toFetch}, nil)
}
}
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.Reader)
})
}
func merge(to *types.MessageInfo, from *types.MessageInfo) {
if from.BodyStructure != nil {
to.BodyStructure = from.BodyStructure
}
if from.Envelope != nil {
to.Envelope = from.Envelope
}
if len(from.Flags) != 0 {
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) {
store.Lock()
update := false
switch msg := msg.(type) {
case *types.DirectoryInfo:
store.DirInfo = *msg
if store.DirInfo.Exists != len(store.Uids) {
store.worker.PostAction(&types.FetchDirectoryContents{}, nil)
}
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:
if existing, ok := store.Messages[msg.Uid]; ok && existing != nil {
merge(existing, msg)
} else {
store.Messages[msg.Uid] = msg
}
if _, ok := store.pendingHeaders[msg.Uid]; msg.Envelope != nil && ok {
delete(store.pendingHeaders, msg.Uid)
if cbs, ok := store.headerCallbacks[msg.Uid]; ok {
for _, cb := range cbs {
cb(msg)
}
}
}
update = true
case *types.FullMessage:
if _, ok := store.pendingBodies[msg.Uid]; ok {
delete(store.pendingBodies, msg.Uid)
if cbs, ok := store.bodyCallbacks[msg.Uid]; ok {
for _, cb := range cbs {
cb(msg.Reader)
}
}
}
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
}
store.Unlock()
if update {
store.update()
}
}
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)) {
store.Lock()
var set imap.SeqSet
for _, uid := range uids {
set.AddNum(uid)
store.Deleted[uid] = nil
}
store.Unlock()
store.worker.PostAction(&types.DeleteMessages{Uids: set}, cb)
store.update()
}
func (store *MessageStore) Copy(uids []uint32, dest string,
cb func(msg types.WorkerMessage)) {
var set imap.SeqSet
for _, uid := range uids {
set.AddNum(uid)
}
store.worker.PostAction(&types.CopyMessages{
Destination: dest,
Uids: set,
}, cb)
}
func (store *MessageStore) Move(uids []uint32, dest string,
cb func(msg types.WorkerMessage)) {
store.Lock()
var set imap.SeqSet
for _, uid := range uids {
set.AddNum(uid)
store.Deleted[uid] = nil
}
store.Unlock()
store.worker.PostAction(&types.CopyMessages{
Destination: dest,
Uids: set,
}, func(msg types.WorkerMessage) {
switch msg.(type) {
case *types.Error:
cb(msg)
case *types.Done:
store.worker.PostAction(&types.DeleteMessages{Uids: set}, cb)
}
})
store.update()
}
|