aboutsummaryrefslogtreecommitdiff
path: root/worker/notmuch/worker.go
blob: 9443f6667d806beee035a7529b64bf16059e6d40 (plain)
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
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
//+build notmuch

package notmuch

import (
	"bufio"
	"fmt"
	"net/url"
	"os"
	"path/filepath"
	"strings"
	"time"

	"git.sr.ht/~sircmpwn/aerc/config"
	"git.sr.ht/~sircmpwn/aerc/lib/uidstore"
	"git.sr.ht/~sircmpwn/aerc/models"
	"git.sr.ht/~sircmpwn/aerc/worker/handlers"
	"git.sr.ht/~sircmpwn/aerc/worker/lib"
	notmuch "git.sr.ht/~sircmpwn/aerc/worker/notmuch/lib"
	"git.sr.ht/~sircmpwn/aerc/worker/types"
	"github.com/mitchellh/go-homedir"
)

func init() {
	handlers.RegisterWorkerFactory("notmuch", NewWorker)
}

var errUnsupported = fmt.Errorf("unsupported command")

const backgroundRefreshDelay = 1 * time.Minute

type worker struct {
	w                   *types.Worker
	nmEvents            chan eventType
	query               string
	currentQueryName    string
	uidStore            *uidstore.Store
	nameQueryMap        map[string]string
	db                  *notmuch.DB
	setupErr            error
	currentSortCriteria []*types.SortCriterion
}

// NewWorker creates a new maildir worker with the provided worker.
func NewWorker(w *types.Worker) (types.Backend, error) {
	events := make(chan eventType, 20)
	return &worker{w: w,
		nmEvents: events}, nil
}

// Run starts the worker's message handling loop.
func (w *worker) Run() {
	for {
		select {
		case action := <-w.w.Actions:
			msg := w.w.ProcessAction(action)
			if err := w.handleMessage(msg); err == errUnsupported {
				w.w.PostMessage(&types.Unsupported{
					Message: types.RespondTo(msg),
				}, nil)
				w.w.Logger.Printf("ProcessAction(%T) unsupported: %v", msg, err)
			} else if err != nil {
				w.w.PostMessage(&types.Error{
					Message: types.RespondTo(msg),
					Error:   err,
				}, nil)
				w.w.Logger.Printf("ProcessAction(%T) failure: %v", msg, err)
			}
		case nmEvent := <-w.nmEvents:
			err := w.handleNotmuchEvent(nmEvent)
			if err != nil {
				w.w.Logger.Printf("notmuch event failure: %v", err)
			}
		}
	}
}

func (w *worker) done(msg types.WorkerMessage) {
	w.w.PostMessage(&types.Done{types.RespondTo(msg)}, nil)
}

func (w *worker) err(msg types.WorkerMessage, err error) {
	w.w.PostMessage(&types.Error{
		Message: types.RespondTo(msg),
		Error:   err,
	}, nil)
}
func (w *worker) handleMessage(msg types.WorkerMessage) error {
	if w.setupErr != nil {
		// only configure can recover from a config error, bail for everything else
		_, isConfigure := msg.(*types.Configure)
		if !isConfigure {
			return w.setupErr
		}
	}

	switch msg := msg.(type) {
	case *types.Unsupported:
		// No-op
	case *types.Configure:
		return w.handleConfigure(msg)
	case *types.Connect:
		return w.handleConnect(msg)
	case *types.ListDirectories:
		return w.handleListDirectories(msg)
	case *types.OpenDirectory:
		return w.handleOpenDirectory(msg)
	case *types.FetchDirectoryContents:
		return w.handleFetchDirectoryContents(msg)
	case *types.FetchMessageHeaders:
		return w.handleFetchMessageHeaders(msg)
	case *types.FetchMessageBodyPart:
		return w.handleFetchMessageBodyPart(msg)
	case *types.FetchFullMessages:
		return w.handleFetchFullMessages(msg)
	case *types.ReadMessages:
		return w.handleReadMessages(msg)
	case *types.SearchDirectory:
		return w.handleSearchDirectory(msg)
	case *types.ModifyLabels:
		return w.handleModifyLabels(msg)

		// not implemented, they are generally not used
		// in a notmuch based workflow
		// case *types.DeleteMessages:
		// case *types.CopyMessages:
		// 	return w.handleCopyMessages(msg)
		// case *types.AppendMessage:
		// 	return w.handleAppendMessage(msg)
		// case *types.CreateDirectory:
		// 	return w.handleCreateDirectory(msg)
	}
	return errUnsupported
}

func (w *worker) handleConfigure(msg *types.Configure) error {
	var err error
	defer func() {
		if err == nil {
			w.setupErr = nil
			return
		}
		w.setupErr = fmt.Errorf("notmuch: %v", err)
	}()

	u, err := url.Parse(msg.Config.Source)
	if err != nil {
		w.w.Logger.Printf("error configuring notmuch worker: %v", err)
		return err
	}
	home, err := homedir.Expand(u.Hostname())
	if err != nil {
		return fmt.Errorf("could not resolve home directory: %v", err)
	}
	pathToDB := filepath.Join(home, u.Path)
	w.uidStore = uidstore.NewStore()
	err = w.loadQueryMap(msg.Config)
	if err != nil {
		return fmt.Errorf("could not load query map configuration: %v", err)
	}
	excludedTags := w.loadExcludeTags(msg.Config)
	w.db = notmuch.NewDB(pathToDB, excludedTags, w.w.Logger)
	return nil
}

func (w *worker) handleConnect(msg *types.Connect) error {
	err := w.db.Connect()
	if err != nil {
		return err
	}
	w.done(msg)
	w.emitLabelList()
	go func() {
		for {
			w.nmEvents <- &updateDirCounts{}
			time.Sleep(backgroundRefreshDelay)
		}
	}()
	return nil
}

func (w *worker) handleListDirectories(msg *types.ListDirectories) error {
	for name := range w.nameQueryMap {
		w.w.PostMessage(&types.Directory{
			Message: types.RespondTo(msg),
			Dir: &models.Directory{
				Name:       name,
				Attributes: []string{},
			},
		}, nil)
	}
	w.done(msg)
	return nil
}

func (w *worker) gatherDirectoryInfo(name string, query string) (
	*types.DirectoryInfo, error) {
	count, err := w.db.QueryCountMessages(query)
	if err != nil {
		return nil, err
	}
	info := &types.DirectoryInfo{
		Info: &models.DirectoryInfo{
			Name:     name,
			Flags:    []string{},
			ReadOnly: false,
			// total messages
			Exists: count.Exists,
			// new messages since mailbox was last opened
			Recent: 0,
			// total unread
			Unseen:         count.Unread,
			AccurateCounts: true,
		},
	}
	return info, nil
}

func (w *worker) emitDirectoryInfo(name string) error {
	query := w.queryFromName(name)
	info, err := w.gatherDirectoryInfo(name, query)
	if err != nil {
		return err
	}
	w.w.PostMessage(info, nil)
	return nil
}

//queryFromName either returns the friendly ID if aliased or the name itself
//assuming it to be the query
func (w *worker) queryFromName(name string) string {
	// try the friendly name first, if that fails assume it's a query
	q, ok := w.nameQueryMap[name]
	if !ok {
		return name
	}
	return q
}

func (w *worker) handleOpenDirectory(msg *types.OpenDirectory) error {
	w.w.Logger.Printf("opening %s", msg.Directory)
	// try the friendly name first, if that fails assume it's a query
	w.query = w.queryFromName(msg.Directory)
	w.currentQueryName = msg.Directory
	info, err := w.gatherDirectoryInfo(msg.Directory, w.query)
	if err != nil {
		return err
	}
	info.Message = types.RespondTo(msg)
	//TODO: why does this need to be sent twice??
	w.w.PostMessage(info, nil)
	w.w.PostMessage(info, nil)
	w.done(msg)
	return nil
}

func (w *worker) handleFetchDirectoryContents(
	msg *types.FetchDirectoryContents) error {
	w.currentSortCriteria = msg.SortCriteria
	err := w.emitDirectoryContents(msg)
	if err != nil {
		return err
	}
	w.done(msg)
	return nil
}

func (w *worker) handleFetchMessageHeaders(
	msg *types.FetchMessageHeaders) error {
	for _, uid := range msg.Uids {
		m, err := w.msgFromUid(uid)
		if err != nil {
			w.w.Logger.Printf("could not get message: %v", err)
			w.err(msg, err)
			continue
		}
		err = w.emitMessageInfo(m, msg)
		if err != nil {
			w.w.Logger.Printf(err.Error())
			w.err(msg, err)
			continue
		}
	}
	w.done(msg)
	return nil
}

func (w *worker) uidsFromQuery(query string) ([]uint32, error) {
	msgIDs, err := w.db.MsgIDsFromQuery(query)
	if err != nil {
		return nil, err
	}
	var uids []uint32
	for _, id := range msgIDs {
		uid := w.uidStore.GetOrInsert(id)
		uids = append(uids, uid)

	}
	return uids, nil
}

func (w *worker) msgFromUid(uid uint32) (*Message, error) {
	key, ok := w.uidStore.GetKey(uid)
	if !ok {
		return nil, fmt.Errorf("Invalid uid: %v", uid)
	}
	msg := &Message{
		key: key,
		uid: uid,
		db:  w.db,
	}
	return msg, nil
}

func (w *worker) handleFetchMessageBodyPart(
	msg *types.FetchMessageBodyPart) error {

	m, err := w.msgFromUid(msg.Uid)
	if err != nil {
		w.w.Logger.Printf("could not get message %d: %v", msg.Uid, err)
		return err
	}
	r, err := m.NewBodyPartReader(msg.Part)
	if err != nil {
		w.w.Logger.Printf(
			"could not get body part reader for message=%d, parts=%#v: %v",
			msg.Uid, msg.Part, err)
		return err
	}
	w.w.PostMessage(&types.MessageBodyPart{
		Message: types.RespondTo(msg),
		Part: &models.MessageBodyPart{
			Reader: r,
			Uid:    msg.Uid,
		},
	}, nil)

	if err := m.MarkRead(true); err != nil {
		w.w.Logger.Printf("could not mark message as read: %v", err)
		return err
	}

	// send updated flags to ui
	if err = w.emitMessageInfo(m, msg); err != nil {
		w.w.Logger.Printf(err.Error())
	}
	if err = w.emitDirectoryInfo(w.currentQueryName); err != nil {
		w.w.Logger.Printf(err.Error())
	}

	w.done(msg)
	return nil
}

func (w *worker) handleFetchFullMessages(msg *types.FetchFullMessages) error {
	for _, uid := range msg.Uids {
		m, err := w.msgFromUid(uid)
		if err != nil {
			w.w.Logger.Printf("could not get message %d: %v", uid, err)
			return err
		}
		r, err := m.NewReader()
		if err != nil {
			w.w.Logger.Printf("could not get message reader: %v", err)
			return err
		}
		w.w.PostMessage(&types.FullMessage{
			Message: types.RespondTo(msg),
			Content: &models.FullMessage{
				Uid:    uid,
				Reader: r,
			},
		}, nil)
	}
	w.done(msg)
	return nil
}

func (w *worker) handleReadMessages(msg *types.ReadMessages) error {
	for _, uid := range msg.Uids {
		m, err := w.msgFromUid(uid)
		if err != nil {
			w.w.Logger.Printf("could not get message: %v", err)
			w.err(msg, err)
			continue
		}
		if err := m.MarkRead(msg.Read); err != nil {
			w.w.Logger.Printf("could not mark message as read: %v", err)
			w.err(msg, err)
			continue
		}
		err = w.emitMessageInfo(m, msg)
		if err != nil {
			w.w.Logger.Printf(err.Error())
			w.err(msg, err)
			continue
		}
	}
	if err := w.emitDirectoryInfo(w.currentQueryName); err != nil {
		w.w.Logger.Printf(err.Error())
	}
	w.done(msg)
	return nil
}

func (w *worker) handleSearchDirectory(msg *types.SearchDirectory) error {
	// the first item is the command (search / filter)
	s := strings.Join(msg.Argv[1:], " ")
	// we only want to search in the current query, so merge the two together
	search := fmt.Sprintf("(%v) and (%v)", w.query, s)
	uids, err := w.uidsFromQuery(search)
	if err != nil {
		return err
	}
	w.w.PostMessage(&types.SearchResults{
		Message: types.RespondTo(msg),
		Uids:    uids,
	}, nil)
	return nil
}

func (w *worker) handleModifyLabels(msg *types.ModifyLabels) error {
	for _, uid := range msg.Uids {
		m, err := w.msgFromUid(uid)
		if err != nil {
			return fmt.Errorf("could not get message from uid %v: %v", uid, err)
		}
		err = m.ModifyTags(msg.Add, msg.Remove)
		if err != nil {
			return fmt.Errorf("could not modify message tags: %v", err)
		}
		err = w.emitMessageInfo(m, msg)
		if err != nil {
			return err
		}
	}
	// tags changed, most probably some messages shifted to other folders
	// so we need to re-enumerate the query content
	err := w.emitDirectoryContents(msg)
	if err != nil {
		return err
	}
	// and update the list of possible tags
	w.emitLabelList()
	if err = w.emitDirectoryInfo(w.currentQueryName); err != nil {
		w.w.Logger.Printf(err.Error())
	}
	w.done(msg)
	return nil
}

func (w *worker) loadQueryMap(acctConfig *config.AccountConfig) error {
	raw, ok := acctConfig.Params["query-map"]
	if !ok {
		// nothing to do
		return nil
	}
	file, err := homedir.Expand(raw)
	if err != nil {
		return err
	}
	f, err := os.Open(file)
	if err != nil {
		return err
	}
	defer f.Close()
	w.nameQueryMap = make(map[string]string)
	scanner := bufio.NewScanner(f)
	for scanner.Scan() {
		line := scanner.Text()
		if line == "" || line[0] == '#' {
			continue
		}

		split := strings.SplitN(line, "=", 2)
		if len(split) != 2 {
			return fmt.Errorf("%v: invalid line %q, want name=query", file, line)
		}
		w.nameQueryMap[split[0]] = split[1]
	}
	return nil
}

func (w *worker) loadExcludeTags(
	acctConfig *config.AccountConfig) []string {
	raw, ok := acctConfig.Params["exclude-tags"]
	if !ok {
		// nothing to do
		return nil
	}
	excludedTags := strings.Split(raw, ",")
	return excludedTags
}

func (w *worker) emitDirectoryContents(parent types.WorkerMessage) error {
	uids, err := w.uidsFromQuery(w.query)
	if err != nil {
		return fmt.Errorf("could not fetch uids: %v", err)
	}
	sortedUids, err := w.sort(uids, w.currentSortCriteria)
	if err != nil {
		w.w.Logger.Printf("error sorting directory: %v", err)
		return err
	}
	w.w.PostMessage(&types.DirectoryContents{
		Message: types.RespondTo(parent),
		Uids:    sortedUids,
	}, nil)
	return nil
}

func (w *worker) emitMessageInfo(m *Message,
	parent types.WorkerMessage) error {
	info, err := m.MessageInfo()
	if err != nil {
		return fmt.Errorf("could not get MessageInfo: %v", err)
	}
	w.w.PostMessage(&types.MessageInfo{
		Message: types.RespondTo(parent),
		Info:    info,
	}, nil)
	return nil
}

func (w *worker) emitLabelList() {
	tags, err := w.db.ListTags()
	if err != nil {
		w.w.Logger.Printf("could not load tags: %v", err)
		return
	}
	w.w.PostMessage(&types.LabelList{Labels: tags}, nil)
}

func (w *worker) sort(uids []uint32,
	criteria []*types.SortCriterion) ([]uint32, error) {
	if len(criteria) == 0 {
		return uids, nil
	}
	var msgInfos []*models.MessageInfo
	for _, uid := range uids {
		m, err := w.msgFromUid(uid)
		if err != nil {
			w.w.Logger.Printf("could not get message: %v", err)
			continue
		}
		info, err := m.MessageInfo()
		if err != nil {
			w.w.Logger.Printf("could not get message info: %v", err)
			continue
		}
		msgInfos = append(msgInfos, info)
	}
	sortedUids, err := lib.Sort(msgInfos, criteria)
	if err != nil {
		w.w.Logger.Printf("could not sort the messages: %v", err)
		return nil, err
	}
	return sortedUids, nil
}