summaryrefslogtreecommitdiff
path: root/rddb/rddb.go
blob: 4fbb303874c0cb009c6498a0eec2895ee7f60400 (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
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
//
//  rhrd-go
//
//  The Radio Helsinki Rivendell Go Package
//
//
//  Copyright (C) 2016 Christian Pointner <equinox@helsinki.at>
//
//  This file is part of rhrd-go.
//
//  rhrd-go is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  any later version.
//
//  rhrd-go is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with rhrd-go. If not, see <http://www.gnu.org/licenses/>.
//

package rddb

import (
	"database/sql"
	"fmt"
	"path/filepath"
	"regexp"
	"strconv"
	"strings"
	"time"

	"github.com/ziutek/mymysql/godrv"
)

var (
	showMacroRe      = regexp.MustCompile(`^LL 1 ([^ ]+) 0\!$`)
	mysqlTableNameRe = regexp.MustCompile(`^[_0-9a-zA-Z-]+$`)
)

const (
	DB_VERSION           = 250
	dropboxPseudoStation = "import-dropbox"
	defaultCartTitle     = "[new cart]"
)

type getPasswordResult struct {
	password string
	err      error
}

type getPasswordRequest struct {
	username string
	cached   bool
	response chan<- getPasswordResult
}

type getGroupOfCartResult struct {
	group string
	err   error
}

type getGroupOfCartRequest struct {
	cart     uint
	response chan<- getGroupOfCartResult
}

type getShowInfoResult struct {
	title   string
	group   string
	carts   []uint
	normLvl int
	trimLvl int
	err     error
}

type getShowInfoRequest struct {
	showid   uint
	response chan<- getShowInfoResult
}

type checkMusicGroupResult struct {
	ismusic bool
	err     error
}

type checkMusicGroupRequest struct {
	group    string
	response chan<- checkMusicGroupResult
}

type getMusicInfoResult struct {
	normLvl int
	trimLvl int
	err     error
}

type getMusicInfoRequest struct {
	group    string
	response chan<- getMusicInfoResult
}

type ShowListEntry struct {
	ID       uint
	Title    string
	log      string
	lowCart  int
	highCart int
}

type ShowList map[uint]ShowListEntry

type getShowListResult struct {
	shows ShowList
	err   error
}

type getShowListRequest struct {
	username string
	response chan<- getShowListResult
}

type CutListEntry struct {
	Number      uint
	Evergreen   bool
	Description string
	Duration    time.Duration
	Imported    NullTime
	NumPlayed   uint
	LastPlayed  NullTime
}

type CartListEntry struct {
	Number uint
	Exists bool
	Artist string
	Title  string
	Album  string
	Cuts   []CutListEntry
}

type getShowCartListResult struct {
	carts []CartListEntry
	err   error
}

type getShowCartListRequest struct {
	show     ShowListEntry
	response chan<- getShowCartListResult
}

type JingleListEntry struct {
	Group        string
	Description  string
	ActiveCart   int
	InactiveCart int
}

type JingleList map[string]JingleListEntry

type getJingleListResult struct {
	jingles JingleList
	err     error
}

type getJingleListRequest struct {
	username string
	response chan<- getJingleListResult
}

type getJingleCutListResult struct {
	active   CartListEntry
	inactive CartListEntry
	err      error
}

type getJingleCutListRequest struct {
	jingle   JingleListEntry
	response chan<- getJingleCutListResult
}

type PoolListEntry struct {
	Group       string
	Description string
}

type PoolList map[string]PoolListEntry

type getPoolListResult struct {
	pools PoolList
	err   error
}

type getPoolListRequest struct {
	username string
	response chan<- getPoolListResult
}

type getPoolCartListResult struct {
	carts map[uint]CartListEntry
	err   error
}

type getPoolCartListRequest struct {
	pool     PoolListEntry
	response chan<- getPoolCartListResult
}

type updateCutCartTitleResult struct {
	err error
}

type updateCutCartTitleRequest struct {
	cart       uint
	cut        uint
	groupName  string
	sourceFile string
	response   chan<- updateCutCartTitleResult
}

type db struct {
	conf                     *config
	dbh                      *sql.DB
	passwordCache            map[string]string
	getPasswordChan          chan getPasswordRequest
	getPasswordStmt          *sql.Stmt
	getGroupOfCartChan       chan getGroupOfCartRequest
	getGroupOfCartStmt       *sql.Stmt
	getShowInfoChan          chan getShowInfoRequest
	getShowInfoStmt          *sql.Stmt
	checkMusicGroupChan      chan checkMusicGroupRequest
	checkMusicGroupStmt      *sql.Stmt
	getMusicInfoChan         chan getMusicInfoRequest
	getMusicInfoStmt         *sql.Stmt
	getShowListChan          chan getShowListRequest
	getShowListStmt          *sql.Stmt
	getShowCartListChan      chan getShowCartListRequest
	getCartInfoStmt          *sql.Stmt
	getCutInfoStmt           *sql.Stmt
	getJingleListChan        chan getJingleListRequest
	getJingleListStmt        *sql.Stmt
	getJingleCutListChan     chan getJingleCutListRequest
	getPoolListChan          chan getPoolListRequest
	getPoolListStmt          *sql.Stmt
	getPoolCartListChan      chan getPoolCartListRequest
	getPoolCartsStmt         *sql.Stmt
	updateCutCartTitleChan   chan updateCutCartTitleRequest
	getGroupDefaultTitleStmt *sql.Stmt
	updateCutTitleStmt       *sql.Stmt
	updateCartTitleMaybeStmt *sql.Stmt
	quit                     chan bool
	done                     chan bool
}

func (d *db) init() (err error) {
	godrv.Register("SET CHARACTER SET utf8;")

	dsn := fmt.Sprintf("tcp:%s:3306*%s/%s/%s", d.conf.dbHost, d.conf.dbDb, d.conf.dbUser, d.conf.dbPasswd)
	if d.dbh, err = sql.Open("mymysql", dsn); err != nil {
		return
	}

	var dbver int
	err = d.dbh.QueryRow("select DB from VERSION;").Scan(&dbver)
	if err != nil {
		err = fmt.Errorf("fetching version: %s", err)
		return
	}
	if dbver != DB_VERSION {
		err = fmt.Errorf("version mismatch is %d, should be %d", dbver, DB_VERSION)
		return
	}

	if d.getPasswordStmt, err = d.dbh.Prepare("select PASSWORD from USERS where LOGIN_NAME = ?;"); err != nil {
		return
	}
	if d.getGroupOfCartStmt, err = d.dbh.Prepare("select NAME,DEFAULT_LOW_CART,DEFAULT_HIGH_CART from GROUPS where DEFAULT_LOW_CART <= ? and DEFAULT_HIGH_CART >= ?;"); err != nil {
		return
	}
	if d.getShowInfoStmt, err = d.dbh.Prepare("select CART.TITLE,CART.MACROS,DROPBOXES.GROUP_NAME,DROPBOXES.NORMALIZATION_LEVEL,DROPBOXES.AUTOTRIM_LEVEL,GROUPS.DEFAULT_LOW_CART,GROUPS.DEFAULT_HIGH_CART from CART, DROPBOXES, GROUPS where CART.NUMBER = DROPBOXES.TO_CART and GROUPS.NAME = DROPBOXES.GROUP_NAME and CART.NUMBER = ?;"); err != nil {
		return
	}
	if d.checkMusicGroupStmt, err = d.dbh.Prepare("select count(*) from DROPBOXES where GROUP_NAME = ? and SET_USER_DEFINED like \"M;%\";"); err != nil {
		return
	}
	if d.getMusicInfoStmt, err = d.dbh.Prepare("select NORMALIZATION_LEVEL,AUTOTRIM_LEVEL from DROPBOXES where DROPBOXES.GROUP_NAME = ?;"); err != nil {
		return
	}
	if d.getShowListStmt, err = d.dbh.Prepare("select CART.TITLE,CART.MACROS,DROPBOXES.TO_CART,DROPBOXES.SET_USER_DEFINED,GROUPS.DEFAULT_LOW_CART,GROUPS.DEFAULT_HIGH_CART from CART, USER_PERMS, DROPBOXES, GROUPS where CART.NUMBER = DROPBOXES.TO_CART and USER_PERMS.USER_NAME = ? and DROPBOXES.GROUP_NAME = USER_PERMS.GROUP_NAME and DROPBOXES.GROUP_NAME = GROUPS.NAME and DROPBOXES.STATION_NAME = ?;"); err != nil {
		return
	}
	if d.getCartInfoStmt, err = d.dbh.Prepare("select TITLE from CART where TYPE=1 and NUMBER = ?"); err != nil {
		return
	}
	if d.getCutInfoStmt, err = d.dbh.Prepare("select CUT_NAME,EVERGREEN,DESCRIPTION,LENGTH,ORIGIN_DATETIME,PLAY_COUNTER,LAST_PLAY_DATETIME from CUTS where CART_NUMBER = ?"); err != nil {
		return
	}
	if d.getJingleListStmt, err = d.dbh.Prepare("select GROUPS.NAME,DROPBOXES.SET_USER_DEFINED,GROUPS.DEFAULT_LOW_CART,GROUPS.DEFAULT_HIGH_CART,GROUPS.DESCRIPTION from USER_PERMS, DROPBOXES, GROUPS where USER_PERMS.USER_NAME = ? and DROPBOXES.GROUP_NAME = USER_PERMS.GROUP_NAME and DROPBOXES.GROUP_NAME = GROUPS.NAME and DROPBOXES.STATION_NAME = ?;"); err != nil {
		return
	}
	if d.getPoolListStmt, err = d.dbh.Prepare("select GROUPS.NAME,DROPBOXES.SET_USER_DEFINED,GROUPS.DESCRIPTION from USER_PERMS, DROPBOXES, GROUPS where USER_PERMS.USER_NAME = ? and DROPBOXES.GROUP_NAME = USER_PERMS.GROUP_NAME and DROPBOXES.GROUP_NAME = GROUPS.NAME and DROPBOXES.STATION_NAME = ?;"); err != nil {
		return
	}
	if d.getPoolCartsStmt, err = d.dbh.Prepare("select CART.NUMBER,CART.ARTIST,CART.TITLE,CART.ALBUM,CUTS.CUT_NAME,CUTS.EVERGREEN,CUTS.DESCRIPTION,CUTS.LENGTH,CUTS.ORIGIN_DATETIME,CUTS.PLAY_COUNTER,CUTS.LAST_PLAY_DATETIME from CUTS,CART where CUTS.CART_NUMBER = CART.NUMBER and CART.GROUP_NAME = ?;"); err != nil {
		return
	}
	if d.getGroupDefaultTitleStmt, err = d.dbh.Prepare("select DEFAULT_TITLE from GROUPS where NAME = ?;"); err != nil {
		return
	}
	if d.updateCutTitleStmt, err = d.dbh.Prepare("update CUTS set DESCRIPTION = ? where CUT_NAME = ?;"); err != nil {
		return
	}
	if d.updateCartTitleMaybeStmt, err = d.dbh.Prepare("update CART set TITLE = ? where NUMBER = ? and TITLE = ?;"); err != nil {
		return
	}

	return
}

func (d *db) getPassword(username string, cached bool) (result getPasswordResult) {
	if cached {
		result.password = d.passwordCache[username]
	}

	if result.password == "" {
		if result.err = d.getPasswordStmt.QueryRow(username).Scan(&result.password); result.err != nil {
			if result.err == sql.ErrNoRows {
				result.err = fmt.Errorf("user '%s' not known by rivendell", username)
			}
			return
		}
		d.passwordCache[username] = result.password
	}

	return
}

func (d *db) getGroupOfCart(cart uint) (result getGroupOfCartResult) {
	var rows *sql.Rows
	if rows, result.err = d.getGroupOfCartStmt.Query(cart, cart); result.err != nil {
		return
	}
	defer rows.Close()
	sizeMin := ^uint(0)
	for rows.Next() {
		var name string
		var lowCart, highCart uint
		if result.err = rows.Scan(&name, &lowCart, &highCart); result.err != nil {
			return
		}
		if highCart >= lowCart {
			size := (highCart - lowCart) + 1
			if sizeMin > size {
				result.group = name
				sizeMin = size
			}
		}
	}
	if result.err = rows.Err(); result.err != nil {
		return
	}
	if result.group == "" {
		result.err = fmt.Errorf("cart is outside of all group cart ranges")
	}
	return
}

func (d *db) getLogTableName(log string) (logtable string, err error) {
	logtable = strings.Replace(log, " ", "_", -1) + "_LOG"
	if !mysqlTableNameRe.MatchString(logtable) {
		return "", fmt.Errorf("the log table name contains illegal charecters: %s", logtable)
	}
	return
}

func (d *db) getShowCarts(log string, lowCart, highCart int) (carts []uint, err error) {
	var logtable string
	if logtable, err = d.getLogTableName(log); err != nil {
		return
	}
	q := fmt.Sprintf("select CART_NUMBER from %s where CART_NUMBER >= %d and CART_NUMBER <= %d order by COUNT;", logtable, lowCart, highCart)
	var rows *sql.Rows
	if rows, err = d.dbh.Query(q); err != nil {
		return
	}
	defer rows.Close()
	for rows.Next() {
		var cart uint
		if err = rows.Scan(&cart); err != nil {
			return
		}
		carts = append(carts, cart)
	}
	err = rows.Err()
	return
}

func (d *db) getShowInfo(showid uint) (result getShowInfoResult) {
	var macros string
	var lowCart, highCart int
	result.err = d.getShowInfoStmt.QueryRow(showid).Scan(&result.title, &macros, &result.group, &result.normLvl, &result.trimLvl, &lowCart, &highCart)
	if result.err != nil {
		if result.err == sql.ErrNoRows {
			result.err = fmt.Errorf("show '%d' not found", showid)
		}
		return
	}
	result.normLvl /= 100
	result.trimLvl /= 100
	result.carts, result.err = d.getShowCarts(showMacroRe.FindStringSubmatch(macros)[1], lowCart, highCart)
	return
}

func (d *db) checkMusicGroup(group string) (result checkMusicGroupResult) {
	var cnt int
	if result.err = d.checkMusicGroupStmt.QueryRow(group).Scan(&cnt); result.err != nil {
		if result.err == sql.ErrNoRows {
			result.err = nil
			result.ismusic = false
		}
		return
	}
	result.ismusic = cnt > 0
	return
}

func (d *db) getMusicInfo(group string) (result getMusicInfoResult) {
	result.err = d.getMusicInfoStmt.QueryRow(group).Scan(&result.normLvl, &result.trimLvl)
	if result.err != nil {
		if result.err == sql.ErrNoRows {
			result.err = fmt.Errorf("music pool '%s' not found", group)
		}
		return
	}
	return
}

func (d *db) getShowList(username string) (result getShowListResult) {
	var rows *sql.Rows
	if rows, result.err = d.getShowListStmt.Query(username, dropboxPseudoStation); result.err != nil {
		return
	}
	defer rows.Close()

	result.shows = make(map[uint]ShowListEntry)
	for rows.Next() {
		var show ShowListEntry
		var macros, params string

		if result.err = rows.Scan(&show.Title, &macros, &show.ID, &params, &show.lowCart, &show.highCart); result.err != nil {
			return
		}
		if params[0] != 'S' {
			continue
		}
		show.log = showMacroRe.FindStringSubmatch(macros)[1]
		result.shows[show.ID] = show
	}
	result.err = rows.Err()
	return
}

func (d *db) getCutInfo(cart uint) (cuts []CutListEntry, err error) {
	var rows *sql.Rows
	if rows, err = d.getCutInfoStmt.Query(cart); err != nil {
		return
	}
	defer rows.Close()

	for rows.Next() {
		var cut = CutListEntry{}
		var cutName, evergreen string
		var length uint

		if err = rows.Scan(&cutName, &evergreen, &cut.Description, &length, &cut.Imported, &cut.NumPlayed, &cut.LastPlayed); err != nil {
			return
		}

		parts := strings.Split(cutName, "_")
		if len(parts) == 2 {
			if cn, converr := strconv.ParseUint(parts[1], 10, 32); converr != nil {
				continue
			} else {
				cut.Number = uint(cn)
			}
		} else {
			continue
		}
		switch evergreen {
		case "Y":
			cut.Evergreen = true
		default:
			cut.Evergreen = false
		}
		cut.Duration = time.Duration(length) * time.Millisecond

		cuts = append(cuts, cut)
	}
	err = rows.Err()
	return
}

func (d *db) getCartInfo(cart uint) (c CartListEntry, err error) {
	c = CartListEntry{}
	c.Number = cart
	c.Exists = true
	err = d.getCartInfoStmt.QueryRow(cart).Scan(&c.Title)
	if err != nil {
		if err == sql.ErrNoRows {
			err = nil
			c.Exists = false
		}
		return
	}
	if c.Cuts, err = d.getCutInfo(cart); err != nil {
		return
	}
	return
}

func (d *db) getShowCartList(show ShowListEntry) (result getShowCartListResult) {
	var carts []uint
	if carts, result.err = d.getShowCarts(show.log, show.lowCart, show.highCart); result.err != nil {
		return
	}

	for _, cart := range carts {
		var c CartListEntry
		if c, result.err = d.getCartInfo(cart); result.err != nil {
			return
		}
		result.carts = append(result.carts, c)
	}
	return
}

func (d *db) getJingleList(username string) (result getJingleListResult) {
	var rows *sql.Rows
	if rows, result.err = d.getJingleListStmt.Query(username, dropboxPseudoStation); result.err != nil {
		return
	}
	defer rows.Close()

	result.jingles = make(map[string]JingleListEntry)
	for rows.Next() {
		var jingle JingleListEntry
		var params string

		if result.err = rows.Scan(&jingle.Group, &params, &jingle.ActiveCart, &jingle.InactiveCart, &jingle.Description); result.err != nil {
			return
		}
		if params[0] != 'J' {
			continue
		}
		result.jingles[jingle.Group] = jingle
	}
	result.err = rows.Err()
	return
}

func (d *db) getJingleCutList(jingle JingleListEntry) (result getJingleCutListResult) {
	if result.active, result.err = d.getCartInfo(uint(jingle.ActiveCart)); result.err != nil {
		return
	}
	if result.inactive, result.err = d.getCartInfo(uint(jingle.InactiveCart)); result.err != nil {
		return
	}
	return
}

func (d *db) getPoolList(username string) (result getPoolListResult) {
	var rows *sql.Rows
	if rows, result.err = d.getPoolListStmt.Query(username, dropboxPseudoStation); result.err != nil {
		return
	}
	defer rows.Close()

	result.pools = make(map[string]PoolListEntry)
	for rows.Next() {
		var pool PoolListEntry
		var params string

		if result.err = rows.Scan(&pool.Group, &params, &pool.Description); result.err != nil {
			return
		}
		if params[0] != 'M' {
			continue
		}
		result.pools[pool.Group] = pool
	}
	result.err = rows.Err()
	return
}

func (d *db) getPoolCartList(pool PoolListEntry) (result getPoolCartListResult) {
	var rows *sql.Rows
	if rows, result.err = d.getPoolCartsStmt.Query(pool.Group); result.err != nil {
		return
	}
	defer rows.Close()

	result.carts = make(map[uint]CartListEntry)
	for rows.Next() {
		var cut CutListEntry
		var cart, length uint
		var cutName, evergreen string
		var artist, title, album sql.NullString

		if result.err = rows.Scan(&cart, &artist, &title, &album, &cutName, &evergreen, &cut.Description, &length, &cut.Imported, &cut.NumPlayed, &cut.LastPlayed); result.err != nil {
			return
		}

		parts := strings.Split(cutName, "_")
		if len(parts) == 2 {
			if cn, converr := strconv.ParseUint(parts[1], 10, 32); converr != nil {
				continue
			} else {
				cut.Number = uint(cn)
			}
		} else {
			continue
		}
		switch evergreen {
		case "Y":
			cut.Evergreen = true
		default:
			cut.Evergreen = false
		}
		cut.Duration = time.Duration(length) * time.Millisecond

		if c, exists := result.carts[cart]; !exists {
			c = CartListEntry{cart, true, artist.String, title.String, album.String, nil}
			c.Cuts = append(c.Cuts, cut)
			result.carts[cart] = c
		} else {
			c.Cuts = append(c.Cuts, cut)
		}
	}
	result.err = rows.Err()
	return
}

func (d *db) updateCutCartTitle(cart, cut uint, groupName, sourceFile string) (result updateCutCartTitleResult) {
	path, filename := filepath.Split(sourceFile)
	ext := strings.TrimLeft(filepath.Ext(filename), ".")
	filename = strings.TrimRight(strings.TrimSuffix(filename, ext), ".")

	if groupName == "" {
		res := d.getGroupOfCart(cart)
		if res.err != nil {
			result.err = res.err
			return
		}
		groupName = res.group
	}

	groupDefaultTitle := ""
	result.err = d.getGroupDefaultTitleStmt.QueryRow(groupName).Scan(&groupDefaultTitle)
	if result.err != nil {
		return
	}

	r := strings.NewReplacer("%p", path, "%f", filename, "%e", ext)
	title := r.Replace(groupDefaultTitle)

	if _, result.err = d.updateCutTitleStmt.Exec(title, fmt.Sprintf("%06d_%03d", cart, cut)); result.err != nil {
		return
	}
	if _, result.err = d.updateCartTitleMaybeStmt.Exec(title, cart, defaultCartTitle); result.err != nil {
		return
	}
	return
}

func (d *db) dispatchRequests() {
	defer func() { d.done <- true }()
	for {
		select {
		case <-d.quit:
			return
		case req := <-d.getPasswordChan:
			req.response <- d.getPassword(req.username, req.cached)
		case req := <-d.getGroupOfCartChan:
			req.response <- d.getGroupOfCart(req.cart)
		case req := <-d.getShowInfoChan:
			req.response <- d.getShowInfo(req.showid)
		case req := <-d.checkMusicGroupChan:
			req.response <- d.checkMusicGroup(req.group)
		case req := <-d.getMusicInfoChan:
			req.response <- d.getMusicInfo(req.group)
		case req := <-d.getShowListChan:
			req.response <- d.getShowList(req.username)
		case req := <-d.getShowCartListChan:
			req.response <- d.getShowCartList(req.show)
		case req := <-d.getJingleListChan:
			req.response <- d.getJingleList(req.username)
		case req := <-d.getJingleCutListChan:
			req.response <- d.getJingleCutList(req.jingle)
		case req := <-d.getPoolListChan:
			req.response <- d.getPoolList(req.username)
		case req := <-d.getPoolCartListChan:
			req.response <- d.getPoolCartList(req.pool)
		case req := <-d.updateCutCartTitleChan:
			req.response <- d.updateCutCartTitle(req.cart, req.cut, req.groupName, req.sourceFile)
		}
	}
}

// *********************************************************
// Public Interface

type DB struct {
	getPasswordChan        chan<- getPasswordRequest
	getGroupOfCartChan     chan<- getGroupOfCartRequest
	getShowInfoChan        chan<- getShowInfoRequest
	checkMusicGroupChan    chan<- checkMusicGroupRequest
	getMusicInfoChan       chan<- getMusicInfoRequest
	getShowListChan        chan<- getShowListRequest
	getShowCartListChan    chan<- getShowCartListRequest
	getJingleListChan      chan<- getJingleListRequest
	getJingleCutListChan   chan<- getJingleCutListRequest
	getPoolListChan        chan<- getPoolListRequest
	getPoolCartListChan    chan<- getPoolCartListRequest
	updateCutCartTitleChan chan<- updateCutCartTitleRequest
}

func (d *DB) GetPassword(username string, cached bool) (string, error) {
	resCh := make(chan getPasswordResult)
	req := getPasswordRequest{}
	req.username = username
	req.cached = cached
	req.response = resCh
	d.getPasswordChan <- req

	res := <-resCh
	if res.err != nil {
		return "", res.err
	}
	return res.password, nil
}

func (d *DB) CheckPassword(username, password string) (bool, error) {
	cached := true

	for {
		resCh := make(chan getPasswordResult)
		req := getPasswordRequest{}
		req.username = username
		req.cached = cached
		req.response = resCh
		d.getPasswordChan <- req

		res := <-resCh
		if res.err != nil {
			return false, res.err
		}
		if password == res.password {
			return true, nil
		}
		if cached {
			cached = false
		} else {
			break
		}
	}
	return false, nil
}

func (d *DB) GetGroupOfCart(cart uint) (string, error) {
	resCh := make(chan getGroupOfCartResult)
	req := getGroupOfCartRequest{}
	req.cart = cart
	req.response = resCh
	d.getGroupOfCartChan <- req

	res := <-resCh
	if res.err != nil {
		return "", res.err
	}
	return res.group, nil
}

func (d *DB) GetShowInfo(showid uint) (string, int, int, []uint, error) {
	resCh := make(chan getShowInfoResult)
	req := getShowInfoRequest{}
	req.showid = showid
	req.response = resCh
	d.getShowInfoChan <- req

	res := <-resCh
	if res.err != nil {
		return "", 0, 0, nil, res.err
	}
	return res.group, res.normLvl, res.trimLvl, res.carts, nil
}

func (d *DB) CheckMusicGroup(groupname string) (bool, error) {
	resCh := make(chan checkMusicGroupResult)
	req := checkMusicGroupRequest{}
	req.group = groupname
	req.response = resCh
	d.checkMusicGroupChan <- req

	res := <-resCh
	if res.err != nil {
		return false, res.err
	}
	return res.ismusic, nil
}

func (d *DB) GetMusicInfo(groupname string) (int, int, error) {
	resCh := make(chan getMusicInfoResult)
	req := getMusicInfoRequest{}
	req.group = groupname
	req.response = resCh
	d.getMusicInfoChan <- req

	res := <-resCh
	if res.err != nil {
		return 0, 0, res.err
	}
	return res.normLvl, res.trimLvl, nil
}

func (d *DB) GetShowList(username string) (ShowList, error) {
	resCh := make(chan getShowListResult)
	req := getShowListRequest{}
	req.username = username
	req.response = resCh
	d.getShowListChan <- req

	res := <-resCh
	if res.err != nil {
		return nil, res.err
	}
	return res.shows, nil
}

func (d *DB) GetShowCartList(show ShowListEntry) ([]CartListEntry, error) {
	resCh := make(chan getShowCartListResult)
	req := getShowCartListRequest{}
	req.show = show
	req.response = resCh
	d.getShowCartListChan <- req

	res := <-resCh
	if res.err != nil {
		return nil, res.err
	}
	return res.carts, nil
}

func (d *DB) GetJingleList(username string) (JingleList, error) {
	resCh := make(chan getJingleListResult)
	req := getJingleListRequest{}
	req.username = username
	req.response = resCh
	d.getJingleListChan <- req

	res := <-resCh
	if res.err != nil {
		return nil, res.err
	}
	return res.jingles, nil
}

func (d *DB) GetJingleCutList(jingle JingleListEntry) (CartListEntry, CartListEntry, error) {
	resCh := make(chan getJingleCutListResult)
	req := getJingleCutListRequest{}
	req.jingle = jingle
	req.response = resCh
	d.getJingleCutListChan <- req

	res := <-resCh
	return res.active, res.inactive, res.err
}

func (d *DB) GetPoolList(username string) (PoolList, error) {
	resCh := make(chan getPoolListResult)
	req := getPoolListRequest{}
	req.username = username
	req.response = resCh
	d.getPoolListChan <- req

	res := <-resCh
	if res.err != nil {
		return nil, res.err
	}
	return res.pools, nil
}

func (d *DB) GetPoolCartList(pool PoolListEntry) (map[uint]CartListEntry, error) {
	resCh := make(chan getPoolCartListResult)
	req := getPoolCartListRequest{}
	req.pool = pool
	req.response = resCh
	d.getPoolCartListChan <- req

	res := <-resCh
	if res.err != nil {
		return nil, res.err
	}
	return res.carts, nil
}

func (d *DB) UpdateCutCartTitle(cart, cut uint, groupName, sourceFile string) error {
	resCh := make(chan updateCutCartTitleResult)
	req := updateCutCartTitleRequest{}
	req.cart = cart
	req.cut = cut
	req.groupName = groupName
	req.sourceFile = sourceFile
	req.response = resCh
	d.updateCutCartTitleChan <- req

	res := <-resCh
	return res.err
}

func (d *db) GetInterface() *DB {
	ch := &DB{}
	ch.getPasswordChan = d.getPasswordChan
	ch.getGroupOfCartChan = d.getGroupOfCartChan
	ch.getShowInfoChan = d.getShowInfoChan
	ch.checkMusicGroupChan = d.checkMusicGroupChan
	ch.getMusicInfoChan = d.getMusicInfoChan
	ch.getShowListChan = d.getShowListChan
	ch.getShowCartListChan = d.getShowCartListChan
	ch.getJingleListChan = d.getJingleListChan
	ch.getJingleCutListChan = d.getJingleCutListChan
	ch.getPoolListChan = d.getPoolListChan
	ch.getPoolCartListChan = d.getPoolCartListChan
	ch.updateCutCartTitleChan = d.updateCutCartTitleChan
	return ch
}

func (d *db) Cleanup() {
	d.quit <- true
	<-d.done
	close(d.quit)
	close(d.done)
	close(d.getPasswordChan)
	if d.dbh != nil {
		d.dbh.Close()
	}
	if d.getPasswordStmt != nil {
		d.getPasswordStmt.Close()
	}
	if d.getGroupOfCartStmt != nil {
		d.getGroupOfCartStmt.Close()
	}
	if d.getShowInfoStmt != nil {
		d.getShowInfoStmt.Close()
	}
	if d.checkMusicGroupStmt != nil {
		d.checkMusicGroupStmt.Close()
	}
	if d.getMusicInfoStmt != nil {
		d.getMusicInfoStmt.Close()
	}
	if d.getShowListStmt != nil {
		d.getShowListStmt.Close()
	}
	if d.getCartInfoStmt != nil {
		d.getCartInfoStmt.Close()
	}
	if d.getCutInfoStmt != nil {
		d.getCutInfoStmt.Close()
	}
	if d.getJingleListStmt != nil {
		d.getJingleListStmt.Close()
	}
	if d.getPoolListStmt != nil {
		d.getPoolListStmt.Close()
	}
	if d.getPoolCartsStmt != nil {
		d.getPoolCartsStmt.Close()
	}
	if d.getGroupDefaultTitleStmt != nil {
		d.getGroupDefaultTitleStmt.Close()
	}
	if d.updateCutTitleStmt != nil {
		d.updateCutTitleStmt.Close()
	}
	if d.updateCartTitleMaybeStmt != nil {
		d.updateCartTitleMaybeStmt.Close()
	}

}

func NewDB(configfile string) (d *db, err error) {
	d = new(db)
	if d.conf, err = newConfig(configfile); err != nil {
		return
	}
	d.quit = make(chan bool)
	d.done = make(chan bool)
	d.passwordCache = make(map[string]string)
	d.getPasswordChan = make(chan getPasswordRequest, 10)
	d.getGroupOfCartChan = make(chan getGroupOfCartRequest, 10)
	d.getShowInfoChan = make(chan getShowInfoRequest, 10)
	d.checkMusicGroupChan = make(chan checkMusicGroupRequest, 10)
	d.getMusicInfoChan = make(chan getMusicInfoRequest, 10)
	d.getShowListChan = make(chan getShowListRequest, 10)
	d.getShowCartListChan = make(chan getShowCartListRequest, 10)
	d.getJingleListChan = make(chan getJingleListRequest, 10)
	d.getJingleCutListChan = make(chan getJingleCutListRequest, 10)
	d.getPoolListChan = make(chan getPoolListRequest, 10)
	d.getPoolCartListChan = make(chan getPoolCartListRequest, 10)
	d.updateCutCartTitleChan = make(chan updateCutCartTitleRequest, 10)

	if err = d.init(); err != nil {
		return
	}

	go d.dispatchRequests()
	return
}