summaryrefslogtreecommitdiffstats
path: root/store/sqlstore/channel_store.go
blob: af78b06e08484f7401e537d8980ecec71638233a (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
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.

package sqlstore

import (
	"database/sql"
	"fmt"
	"net/http"
	"strconv"
	"strings"

	l4g "github.com/alecthomas/log4go"
	"github.com/mattermost/gorp"
	"github.com/mattermost/mattermost-server/einterfaces"
	"github.com/mattermost/mattermost-server/model"
	"github.com/mattermost/mattermost-server/store"
	"github.com/mattermost/mattermost-server/utils"
)

const (
	ALL_CHANNEL_MEMBERS_FOR_USER_CACHE_SIZE = model.SESSION_CACHE_SIZE
	ALL_CHANNEL_MEMBERS_FOR_USER_CACHE_SEC  = 900 // 15 mins

	ALL_CHANNEL_MEMBERS_NOTIFY_PROPS_FOR_CHANNEL_CACHE_SIZE = model.SESSION_CACHE_SIZE
	ALL_CHANNEL_MEMBERS_NOTIFY_PROPS_FOR_CHANNEL_CACHE_SEC  = 1800 // 30 mins

	CHANNEL_MEMBERS_COUNTS_CACHE_SIZE = model.CHANNEL_CACHE_SIZE
	CHANNEL_MEMBERS_COUNTS_CACHE_SEC  = 1800 // 30 mins

	CHANNEL_CACHE_SEC = 900 // 15 mins
)

type SqlChannelStore struct {
	SqlStore
	metrics einterfaces.MetricsInterface
}

var channelMemberCountsCache = utils.NewLru(CHANNEL_MEMBERS_COUNTS_CACHE_SIZE)
var allChannelMembersForUserCache = utils.NewLru(ALL_CHANNEL_MEMBERS_FOR_USER_CACHE_SIZE)
var allChannelMembersNotifyPropsForChannelCache = utils.NewLru(ALL_CHANNEL_MEMBERS_NOTIFY_PROPS_FOR_CHANNEL_CACHE_SIZE)
var channelCache = utils.NewLru(model.CHANNEL_CACHE_SIZE)
var channelByNameCache = utils.NewLru(model.CHANNEL_CACHE_SIZE)

func ClearChannelCaches() {
	channelMemberCountsCache.Purge()
	allChannelMembersForUserCache.Purge()
	allChannelMembersNotifyPropsForChannelCache.Purge()
	channelCache.Purge()
	channelByNameCache.Purge()
}

func NewSqlChannelStore(sqlStore SqlStore, metrics einterfaces.MetricsInterface) store.ChannelStore {
	s := &SqlChannelStore{
		SqlStore: sqlStore,
		metrics:  metrics,
	}

	for _, db := range sqlStore.GetAllConns() {
		table := db.AddTableWithName(model.Channel{}, "Channels").SetKeys(false, "Id")
		table.ColMap("Id").SetMaxSize(26)
		table.ColMap("TeamId").SetMaxSize(26)
		table.ColMap("Type").SetMaxSize(1)
		table.ColMap("DisplayName").SetMaxSize(64)
		table.ColMap("Name").SetMaxSize(64)
		table.SetUniqueTogether("Name", "TeamId")
		table.ColMap("Header").SetMaxSize(1024)
		table.ColMap("Purpose").SetMaxSize(250)
		table.ColMap("CreatorId").SetMaxSize(26)

		tablem := db.AddTableWithName(model.ChannelMember{}, "ChannelMembers").SetKeys(false, "ChannelId", "UserId")
		tablem.ColMap("ChannelId").SetMaxSize(26)
		tablem.ColMap("UserId").SetMaxSize(26)
		tablem.ColMap("Roles").SetMaxSize(64)
		tablem.ColMap("NotifyProps").SetMaxSize(2000)
	}

	return s
}

func (s SqlChannelStore) CreateIndexesIfNotExists() {
	s.CreateIndexIfNotExists("idx_channels_team_id", "Channels", "TeamId")
	s.CreateIndexIfNotExists("idx_channels_name", "Channels", "Name")
	s.CreateIndexIfNotExists("idx_channels_update_at", "Channels", "UpdateAt")
	s.CreateIndexIfNotExists("idx_channels_create_at", "Channels", "CreateAt")
	s.CreateIndexIfNotExists("idx_channels_delete_at", "Channels", "DeleteAt")

	if s.DriverName() == model.DATABASE_DRIVER_POSTGRES {
		s.CreateIndexIfNotExists("idx_channels_name_lower", "Channels", "lower(Name)")
		s.CreateIndexIfNotExists("idx_channels_displayname_lower", "Channels", "lower(DisplayName)")
	}

	s.CreateIndexIfNotExists("idx_channelmembers_channel_id", "ChannelMembers", "ChannelId")
	s.CreateIndexIfNotExists("idx_channelmembers_user_id", "ChannelMembers", "UserId")

	s.CreateFullTextIndexIfNotExists("idx_channels_txt", "Channels", "Name, DisplayName")
}

func (s SqlChannelStore) Save(channel *model.Channel, maxChannelsPerTeam int64) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		if channel.Type == model.CHANNEL_DIRECT {
			result.Err = model.NewAppError("SqlChannelStore.Save", "store.sql_channel.save.direct_channel.app_error", nil, "", http.StatusBadRequest)
		} else {
			if transaction, err := s.GetMaster().Begin(); err != nil {
				result.Err = model.NewAppError("SqlChannelStore.Save", "store.sql_channel.save.open_transaction.app_error", nil, err.Error(), http.StatusInternalServerError)
			} else {
				*result = s.saveChannelT(transaction, channel, maxChannelsPerTeam)
				if result.Err != nil {
					transaction.Rollback()
				} else {
					if err := transaction.Commit(); err != nil {
						result.Err = model.NewAppError("SqlChannelStore.Save", "store.sql_channel.save.commit_transaction.app_error", nil, err.Error(), http.StatusInternalServerError)
					}
				}
			}
		}
	})
}

func (s SqlChannelStore) CreateDirectChannel(userId string, otherUserId string) store.StoreChannel {
	channel := new(model.Channel)

	channel.DisplayName = ""
	channel.Name = model.GetDMNameFromIds(otherUserId, userId)

	channel.Header = ""
	channel.Type = model.CHANNEL_DIRECT

	cm1 := &model.ChannelMember{
		UserId:      userId,
		NotifyProps: model.GetDefaultChannelNotifyProps(),
		Roles:       model.CHANNEL_USER_ROLE_ID,
	}
	cm2 := &model.ChannelMember{
		UserId:      otherUserId,
		NotifyProps: model.GetDefaultChannelNotifyProps(),
		Roles:       model.CHANNEL_USER_ROLE_ID,
	}

	return s.SaveDirectChannel(channel, cm1, cm2)
}

func (s SqlChannelStore) SaveDirectChannel(directchannel *model.Channel, member1 *model.ChannelMember, member2 *model.ChannelMember) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		if directchannel.Type != model.CHANNEL_DIRECT {
			result.Err = model.NewAppError("SqlChannelStore.SaveDirectChannel", "store.sql_channel.save_direct_channel.not_direct.app_error", nil, "", http.StatusBadRequest)
		} else {
			if transaction, err := s.GetMaster().Begin(); err != nil {
				result.Err = model.NewAppError("SqlChannelStore.SaveDirectChannel", "store.sql_channel.save_direct_channel.open_transaction.app_error", nil, err.Error(), http.StatusInternalServerError)
			} else {
				directchannel.TeamId = ""
				channelResult := s.saveChannelT(transaction, directchannel, 0)

				if channelResult.Err != nil {
					transaction.Rollback()
					result.Err = channelResult.Err
					result.Data = channelResult.Data
				} else {
					newChannel := channelResult.Data.(*model.Channel)
					// Members need new channel ID
					member1.ChannelId = newChannel.Id
					member2.ChannelId = newChannel.Id

					member1Result := s.saveMemberT(transaction, member1, newChannel)
					member2Result := member1Result
					if member1.UserId != member2.UserId {
						member2Result = s.saveMemberT(transaction, member2, newChannel)
					}

					if member1Result.Err != nil || member2Result.Err != nil {
						transaction.Rollback()
						details := ""
						if member1Result.Err != nil {
							details += "Member1Err: " + member1Result.Err.Message
						}
						if member2Result.Err != nil {
							details += "Member2Err: " + member2Result.Err.Message
						}
						result.Err = model.NewAppError("SqlChannelStore.SaveDirectChannel", "store.sql_channel.save_direct_channel.add_members.app_error", nil, details, http.StatusInternalServerError)
					} else {
						if err := transaction.Commit(); err != nil {
							result.Err = model.NewAppError("SqlChannelStore.SaveDirectChannel", "store.sql_channel.save_direct_channel.commit.app_error", nil, err.Error(), http.StatusInternalServerError)
						} else {
							*result = channelResult
						}
					}
				}
			}
		}
	})
}

func (s SqlChannelStore) saveChannelT(transaction *gorp.Transaction, channel *model.Channel, maxChannelsPerTeam int64) store.StoreResult {
	result := store.StoreResult{}

	if len(channel.Id) > 0 {
		result.Err = model.NewAppError("SqlChannelStore.Save", "store.sql_channel.save_channel.existing.app_error", nil, "id="+channel.Id, http.StatusBadRequest)
		return result
	}

	channel.PreSave()
	if result.Err = channel.IsValid(); result.Err != nil {
		return result
	}

	if channel.Type != model.CHANNEL_DIRECT && channel.Type != model.CHANNEL_GROUP && maxChannelsPerTeam >= 0 {
		if count, err := transaction.SelectInt("SELECT COUNT(0) FROM Channels WHERE TeamId = :TeamId AND DeleteAt = 0 AND (Type = 'O' OR Type = 'P')", map[string]interface{}{"TeamId": channel.TeamId}); err != nil {
			result.Err = model.NewAppError("SqlChannelStore.Save", "store.sql_channel.save_channel.current_count.app_error", nil, "teamId="+channel.TeamId+", "+err.Error(), http.StatusInternalServerError)
			return result
		} else if count >= maxChannelsPerTeam {
			result.Err = model.NewAppError("SqlChannelStore.Save", "store.sql_channel.save_channel.limit.app_error", nil, "teamId="+channel.TeamId, http.StatusBadRequest)
			return result
		}
	}

	if err := transaction.Insert(channel); err != nil {
		if IsUniqueConstraintError(err, []string{"Name", "channels_name_teamid_key"}) {
			dupChannel := model.Channel{}
			s.GetMaster().SelectOne(&dupChannel, "SELECT * FROM Channels WHERE TeamId = :TeamId AND Name = :Name", map[string]interface{}{"TeamId": channel.TeamId, "Name": channel.Name})
			if dupChannel.DeleteAt > 0 {
				result.Err = model.NewAppError("SqlChannelStore.Save", "store.sql_channel.save_channel.previously.app_error", nil, "id="+channel.Id+", "+err.Error(), http.StatusBadRequest)
			} else {
				result.Err = model.NewAppError("SqlChannelStore.Save", store.CHANNEL_EXISTS_ERROR, nil, "id="+channel.Id+", "+err.Error(), http.StatusBadRequest)
				result.Data = &dupChannel
			}
		} else {
			result.Err = model.NewAppError("SqlChannelStore.Save", "store.sql_channel.save_channel.save.app_error", nil, "id="+channel.Id+", "+err.Error(), http.StatusInternalServerError)
		}
	} else {
		result.Data = channel
	}

	return result
}

func (s SqlChannelStore) Update(channel *model.Channel) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		channel.PreUpdate()

		if result.Err = channel.IsValid(); result.Err != nil {
			return
		}

		if count, err := s.GetMaster().Update(channel); err != nil {
			if IsUniqueConstraintError(err, []string{"Name", "channels_name_teamid_key"}) {
				dupChannel := model.Channel{}
				s.GetReplica().SelectOne(&dupChannel, "SELECT * FROM Channels WHERE TeamId = :TeamId AND Name= :Name AND DeleteAt > 0", map[string]interface{}{"TeamId": channel.TeamId, "Name": channel.Name})
				if dupChannel.DeleteAt > 0 {
					result.Err = model.NewAppError("SqlChannelStore.Update", "store.sql_channel.update.previously.app_error", nil, "id="+channel.Id+", "+err.Error(), http.StatusBadRequest)
				} else {
					result.Err = model.NewAppError("SqlChannelStore.Update", "store.sql_channel.update.exists.app_error", nil, "id="+channel.Id+", "+err.Error(), http.StatusBadRequest)
				}
			} else {
				result.Err = model.NewAppError("SqlChannelStore.Update", "store.sql_channel.update.updating.app_error", nil, "id="+channel.Id+", "+err.Error(), http.StatusInternalServerError)
			}
		} else if count != 1 {
			result.Err = model.NewAppError("SqlChannelStore.Update", "store.sql_channel.update.app_error", nil, "id="+channel.Id, http.StatusInternalServerError)
		} else {
			result.Data = channel
		}
	})
}

func (s SqlChannelStore) extraUpdated(channel *model.Channel) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		channel.ExtraUpdated()

		_, err := s.GetMaster().Exec(
			`UPDATE
				Channels
			SET
				ExtraUpdateAt = :Time
			WHERE
				Id = :Id`,
			map[string]interface{}{"Id": channel.Id, "Time": channel.ExtraUpdateAt})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.extraUpdated", "store.sql_channel.extra_updated.app_error", nil, "id="+channel.Id+", "+err.Error(), http.StatusInternalServerError)
		}
	})
}

func (s SqlChannelStore) GetChannelUnread(channelId, userId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		var unreadChannel model.ChannelUnread
		err := s.GetReplica().SelectOne(&unreadChannel,
			`SELECT
				Channels.TeamId TeamId, Channels.Id ChannelId, (Channels.TotalMsgCount - ChannelMembers.MsgCount) MsgCount, ChannelMembers.MentionCount MentionCount, ChannelMembers.NotifyProps NotifyProps
			FROM
				Channels, ChannelMembers
			WHERE
				Id = ChannelId
                AND Id = :ChannelId
                AND UserId = :UserId
                AND DeleteAt = 0`,
			map[string]interface{}{"ChannelId": channelId, "UserId": userId})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetChannelUnread", "store.sql_channel.get_unread.app_error", nil, "channelId="+channelId+" "+err.Error(), http.StatusInternalServerError)
			if err == sql.ErrNoRows {
				result.Err.StatusCode = http.StatusNotFound
			}
		} else {
			result.Data = &unreadChannel
		}
	})
}

func (us SqlChannelStore) InvalidateChannel(id string) {
	channelCache.Remove(id)
}

func (us SqlChannelStore) InvalidateChannelByName(teamId, name string) {
	channelByNameCache.Remove(teamId + name)
}

func (s SqlChannelStore) Get(id string, allowFromCache bool) store.StoreChannel {
	return s.get(id, false, allowFromCache)
}

func (s SqlChannelStore) GetPinnedPosts(channelId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		pl := model.NewPostList()

		var posts []*model.Post
		if _, err := s.GetReplica().Select(&posts, "SELECT * FROM Posts WHERE IsPinned = true AND ChannelId = :ChannelId AND DeleteAt = 0 ORDER BY CreateAt ASC", map[string]interface{}{"ChannelId": channelId}); err != nil {
			result.Err = model.NewAppError("SqlPostStore.GetPinnedPosts", "store.sql_channel.pinned_posts.app_error", nil, err.Error(), http.StatusInternalServerError)
		} else {
			for _, post := range posts {
				pl.AddPost(post)
				pl.AddOrder(post.Id)
			}
		}

		result.Data = pl
	})
}

func (s SqlChannelStore) GetFromMaster(id string) store.StoreChannel {
	return s.get(id, true, false)
}

func (s SqlChannelStore) get(id string, master bool, allowFromCache bool) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		var db *gorp.DbMap
		if master {
			db = s.GetMaster()
		} else {
			db = s.GetReplica()
		}

		if allowFromCache {
			if cacheItem, ok := channelCache.Get(id); ok {
				if s.metrics != nil {
					s.metrics.IncrementMemCacheHitCounter("Channel")
				}
				result.Data = (cacheItem.(*model.Channel)).DeepCopy()
				return
			} else {
				if s.metrics != nil {
					s.metrics.IncrementMemCacheMissCounter("Channel")
				}
			}
		} else {
			if s.metrics != nil {
				s.metrics.IncrementMemCacheMissCounter("Channel")
			}
		}

		if obj, err := db.Get(model.Channel{}, id); err != nil {
			result.Err = model.NewAppError("SqlChannelStore.Get", "store.sql_channel.get.find.app_error", nil, "id="+id+", "+err.Error(), http.StatusInternalServerError)
		} else if obj == nil {
			result.Err = model.NewAppError("SqlChannelStore.Get", "store.sql_channel.get.existing.app_error", nil, "id="+id, http.StatusNotFound)
		} else {
			result.Data = obj.(*model.Channel)
			channelCache.AddWithExpiresInSecs(id, obj.(*model.Channel), CHANNEL_CACHE_SEC)
		}
	})
}

func (s SqlChannelStore) Delete(channelId string, time int64) store.StoreChannel {
	return s.SetDeleteAt(channelId, time, time)
}

func (s SqlChannelStore) Restore(channelId string, time int64) store.StoreChannel {
	return s.SetDeleteAt(channelId, 0, time)
}

func (s SqlChannelStore) SetDeleteAt(channelId string, deleteAt int64, updateAt int64) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		_, err := s.GetMaster().Exec("Update Channels SET DeleteAt = :DeleteAt, UpdateAt = :UpdateAt WHERE Id = :ChannelId", map[string]interface{}{"DeleteAt": deleteAt, "UpdateAt": updateAt, "ChannelId": channelId})
		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.Delete", "store.sql_channel.delete.channel.app_error", nil, "id="+channelId+", err="+err.Error(), http.StatusInternalServerError)
		}
	})
}

func (s SqlChannelStore) PermanentDeleteByTeam(teamId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		if _, err := s.GetMaster().Exec("DELETE FROM Channels WHERE TeamId = :TeamId", map[string]interface{}{"TeamId": teamId}); err != nil {
			result.Err = model.NewAppError("SqlChannelStore.PermanentDeleteByTeam", "store.sql_channel.permanent_delete_by_team.app_error", nil, "teamId="+teamId+", "+err.Error(), http.StatusInternalServerError)
		}
	})
}

func (s SqlChannelStore) PermanentDelete(channelId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		if _, err := s.GetMaster().Exec("DELETE FROM Channels WHERE Id = :ChannelId", map[string]interface{}{"ChannelId": channelId}); err != nil {
			result.Err = model.NewAppError("SqlChannelStore.PermanentDelete", "store.sql_channel.permanent_delete.app_error", nil, "channel_id="+channelId+", "+err.Error(), http.StatusInternalServerError)
		}
	})
}

func (s SqlChannelStore) PermanentDeleteMembersByChannel(channelId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		_, err := s.GetMaster().Exec("DELETE FROM ChannelMembers WHERE ChannelId = :ChannelId", map[string]interface{}{"ChannelId": channelId})
		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.RemoveAllMembersByChannel", "store.sql_channel.remove_member.app_error", nil, "channel_id="+channelId+", "+err.Error(), http.StatusInternalServerError)
		}
	})
}

func (s SqlChannelStore) GetChannels(teamId string, userId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		data := &model.ChannelList{}
		_, err := s.GetReplica().Select(data, "SELECT Channels.* FROM Channels, ChannelMembers WHERE Id = ChannelId AND UserId = :UserId AND DeleteAt = 0 AND (TeamId = :TeamId OR TeamId = '') ORDER BY DisplayName", map[string]interface{}{"TeamId": teamId, "UserId": userId})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetChannels", "store.sql_channel.get_channels.get.app_error", nil, "teamId="+teamId+", userId="+userId+", err="+err.Error(), http.StatusInternalServerError)
		} else {
			if len(*data) == 0 {
				result.Err = model.NewAppError("SqlChannelStore.GetChannels", "store.sql_channel.get_channels.not_found.app_error", nil, "teamId="+teamId+", userId="+userId, http.StatusBadRequest)
			} else {
				result.Data = data
			}
		}
	})
}

func (s SqlChannelStore) GetMoreChannels(teamId string, userId string, offset int, limit int) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		data := &model.ChannelList{}
		_, err := s.GetReplica().Select(data,
			`SELECT
			    *
			FROM
			    Channels
			WHERE
			    TeamId = :TeamId1
					AND Type IN ('O')
					AND DeleteAt = 0
			        AND Id NOT IN (SELECT
			            Channels.Id
			        FROM
			            Channels,
			            ChannelMembers
			        WHERE
			            Id = ChannelId
			                AND TeamId = :TeamId2
			                AND UserId = :UserId
			                AND DeleteAt = 0)
			ORDER BY DisplayName
			LIMIT :Limit
			OFFSET :Offset`,
			map[string]interface{}{"TeamId1": teamId, "TeamId2": teamId, "UserId": userId, "Limit": limit, "Offset": offset})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetMoreChannels", "store.sql_channel.get_more_channels.get.app_error", nil, "teamId="+teamId+", userId="+userId+", err="+err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = data
		}
	})
}

func (s SqlChannelStore) GetPublicChannelsForTeam(teamId string, offset int, limit int) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		data := &model.ChannelList{}
		_, err := s.GetReplica().Select(data,
			`SELECT
			    *
			FROM
			    Channels
			WHERE
			    TeamId = :TeamId
					AND Type = 'O'
					AND DeleteAt = 0
			ORDER BY DisplayName
			LIMIT :Limit
			OFFSET :Offset`,
			map[string]interface{}{"TeamId": teamId, "Limit": limit, "Offset": offset})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetPublicChannelsForTeam", "store.sql_channel.get_public_channels.get.app_error", nil, "teamId="+teamId+", err="+err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = data
		}
	})
}

func (s SqlChannelStore) GetPublicChannelsByIdsForTeam(teamId string, channelIds []string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		props := make(map[string]interface{})
		props["teamId"] = teamId

		idQuery := ""

		for index, channelId := range channelIds {
			if len(idQuery) > 0 {
				idQuery += ", "
			}

			props["channelId"+strconv.Itoa(index)] = channelId
			idQuery += ":channelId" + strconv.Itoa(index)
		}

		data := &model.ChannelList{}
		_, err := s.GetReplica().Select(data,
			`SELECT
			    *
			FROM
			    Channels
			WHERE
			    TeamId = :teamId
					AND Type = 'O'
					AND DeleteAt = 0
					AND Id IN (`+idQuery+`)
			ORDER BY DisplayName`,
			props)

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetPublicChannelsByIdsForTeam", "store.sql_channel.get_channels_by_ids.get.app_error", nil, err.Error(), http.StatusInternalServerError)
		}

		if len(*data) == 0 {
			result.Err = model.NewAppError("SqlChannelStore.GetPublicChannelsByIdsForTeam", "store.sql_channel.get_channels_by_ids.not_found.app_error", nil, "", http.StatusNotFound)
		}

		result.Data = data
	})
}

type channelIdWithCountAndUpdateAt struct {
	Id            string
	TotalMsgCount int64
	UpdateAt      int64
}

func (s SqlChannelStore) GetChannelCounts(teamId string, userId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		var data []channelIdWithCountAndUpdateAt
		_, err := s.GetReplica().Select(&data, "SELECT Id, TotalMsgCount, UpdateAt FROM Channels WHERE Id IN (SELECT ChannelId FROM ChannelMembers WHERE UserId = :UserId) AND (TeamId = :TeamId OR TeamId = '') AND DeleteAt = 0 ORDER BY DisplayName", map[string]interface{}{"TeamId": teamId, "UserId": userId})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetChannelCounts", "store.sql_channel.get_channel_counts.get.app_error", nil, "teamId="+teamId+", userId="+userId+", err="+err.Error(), http.StatusInternalServerError)
		} else {
			counts := &model.ChannelCounts{Counts: make(map[string]int64), UpdateTimes: make(map[string]int64)}
			for i := range data {
				v := data[i]
				counts.Counts[v.Id] = v.TotalMsgCount
				counts.UpdateTimes[v.Id] = v.UpdateAt
			}

			result.Data = counts
		}
	})
}

func (s SqlChannelStore) GetTeamChannels(teamId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		data := &model.ChannelList{}
		_, err := s.GetReplica().Select(data, "SELECT * FROM Channels WHERE TeamId = :TeamId And Type != 'D' ORDER BY DisplayName", map[string]interface{}{"TeamId": teamId})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetChannels", "store.sql_channel.get_channels.get.app_error", nil, "teamId="+teamId+",  err="+err.Error(), http.StatusInternalServerError)
		} else {
			if len(*data) == 0 {
				result.Err = model.NewAppError("SqlChannelStore.GetChannels", "store.sql_channel.get_channels.not_found.app_error", nil, "teamId="+teamId, http.StatusNotFound)
			} else {
				result.Data = data
			}
		}
	})
}

func (s SqlChannelStore) GetByName(teamId string, name string, allowFromCache bool) store.StoreChannel {
	return s.getByName(teamId, name, false, allowFromCache)
}

func (s SqlChannelStore) GetByNames(teamId string, names []string, allowFromCache bool) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		var channels []*model.Channel

		if allowFromCache {
			var misses []string
			visited := make(map[string]struct{})
			for _, name := range names {
				if _, ok := visited[name]; ok {
					continue
				}
				visited[name] = struct{}{}
				if cacheItem, ok := channelByNameCache.Get(teamId + name); ok {
					if s.metrics != nil {
						s.metrics.IncrementMemCacheHitCounter("Channel By Name")
					}
					channels = append(channels, cacheItem.(*model.Channel))
				} else {
					if s.metrics != nil {
						s.metrics.IncrementMemCacheMissCounter("Channel By Name")
					}
					misses = append(misses, name)
				}
			}
			names = misses
		}

		if len(names) > 0 {
			props := map[string]interface{}{}
			var namePlaceholders []string
			for _, name := range names {
				key := fmt.Sprintf("Name%v", len(namePlaceholders))
				props[key] = name
				namePlaceholders = append(namePlaceholders, ":"+key)
			}

			var query string
			if teamId == "" {
				query = `SELECT * FROM Channels WHERE Name IN (` + strings.Join(namePlaceholders, ", ") + `) AND DeleteAt = 0`
			} else {
				props["TeamId"] = teamId
				query = `SELECT * FROM Channels WHERE Name IN (` + strings.Join(namePlaceholders, ", ") + `) AND TeamId = :TeamId AND DeleteAt = 0`
			}

			var dbChannels []*model.Channel
			if _, err := s.GetReplica().Select(&dbChannels, query, props); err != nil && err != sql.ErrNoRows {
				result.Err = model.NewAppError("SqlChannelStore.GetByName", "store.sql_channel.get_by_name.existing.app_error", nil, "teamId="+teamId+", "+err.Error(), http.StatusInternalServerError)
				return
			}
			for _, channel := range dbChannels {
				channelByNameCache.AddWithExpiresInSecs(teamId+channel.Name, channel, CHANNEL_CACHE_SEC)
				channels = append(channels, channel)
			}
		}

		result.Data = channels
	})
}

func (s SqlChannelStore) GetByNameIncludeDeleted(teamId string, name string, allowFromCache bool) store.StoreChannel {
	return s.getByName(teamId, name, true, allowFromCache)
}

func (s SqlChannelStore) getByName(teamId string, name string, includeDeleted bool, allowFromCache bool) store.StoreChannel {
	var query string
	if includeDeleted {
		query = "SELECT * FROM Channels WHERE (TeamId = :TeamId OR TeamId = '') AND Name = :Name"
	} else {
		query = "SELECT * FROM Channels WHERE (TeamId = :TeamId OR TeamId = '') AND Name = :Name AND DeleteAt = 0"
	}
	return store.Do(func(result *store.StoreResult) {
		channel := model.Channel{}

		if allowFromCache {
			if cacheItem, ok := channelByNameCache.Get(teamId + name); ok {
				if s.metrics != nil {
					s.metrics.IncrementMemCacheHitCounter("Channel By Name")
				}
				result.Data = cacheItem.(*model.Channel)
				return
			} else {
				if s.metrics != nil {
					s.metrics.IncrementMemCacheMissCounter("Channel By Name")
				}
			}
		}
		if err := s.GetReplica().SelectOne(&channel, query, map[string]interface{}{"TeamId": teamId, "Name": name}); err != nil {
			if err == sql.ErrNoRows {
				result.Err = model.NewAppError("SqlChannelStore.GetByName", store.MISSING_CHANNEL_ERROR, nil, "teamId="+teamId+", "+"name="+name+", "+err.Error(), http.StatusNotFound)
			} else {
				result.Err = model.NewAppError("SqlChannelStore.GetByName", "store.sql_channel.get_by_name.existing.app_error", nil, "teamId="+teamId+", "+"name="+name+", "+err.Error(), http.StatusInternalServerError)
			}
		} else {
			result.Data = &channel
			channelByNameCache.AddWithExpiresInSecs(teamId+name, &channel, CHANNEL_CACHE_SEC)
		}
	})
}

func (s SqlChannelStore) GetDeletedByName(teamId string, name string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		channel := model.Channel{}

		if err := s.GetReplica().SelectOne(&channel, "SELECT * FROM Channels WHERE (TeamId = :TeamId OR TeamId = '') AND Name = :Name AND DeleteAt != 0", map[string]interface{}{"TeamId": teamId, "Name": name}); err != nil {
			if err == sql.ErrNoRows {
				result.Err = model.NewAppError("SqlChannelStore.GetDeletedByName", "store.sql_channel.get_deleted_by_name.missing.app_error", nil, "teamId="+teamId+", "+"name="+name+", "+err.Error(), http.StatusNotFound)
			} else {
				result.Err = model.NewAppError("SqlChannelStore.GetDeletedByName", "store.sql_channel.get_deleted_by_name.existing.app_error", nil, "teamId="+teamId+", "+"name="+name+", "+err.Error(), http.StatusInternalServerError)
			}
		} else {
			result.Data = &channel
		}
	})
}

func (s SqlChannelStore) GetDeleted(teamId string, offset int, limit int) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		channels := &model.ChannelList{}

		if _, err := s.GetReplica().Select(channels, "SELECT * FROM Channels WHERE (TeamId = :TeamId OR TeamId = '') AND DeleteAt != 0 ORDER BY DisplayName LIMIT :Limit OFFSET :Offset", map[string]interface{}{"TeamId": teamId, "Limit": limit, "Offset": offset}); err != nil {
			if err == sql.ErrNoRows {
				result.Err = model.NewAppError("SqlChannelStore.GetDeleted", "store.sql_channel.get_deleted.missing.app_error", nil, "teamId="+teamId+", "+err.Error(), http.StatusNotFound)
			} else {
				result.Err = model.NewAppError("SqlChannelStore.GetDeleted", "store.sql_channel.get_deleted.existing.app_error", nil, "teamId="+teamId+", "+err.Error(), http.StatusInternalServerError)
			}
		} else {
			result.Data = channels
		}
	})
}

func (s SqlChannelStore) SaveMember(member *model.ChannelMember) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		// Grab the channel we are saving this member to
		if cr := <-s.GetFromMaster(member.ChannelId); cr.Err != nil {
			result.Err = cr.Err
		} else {
			channel := cr.Data.(*model.Channel)

			if transaction, err := s.GetMaster().Begin(); err != nil {
				result.Err = model.NewAppError("SqlChannelStore.SaveMember", "store.sql_channel.save_member.open_transaction.app_error", nil, err.Error(), http.StatusInternalServerError)
			} else {
				*result = s.saveMemberT(transaction, member, channel)
				if result.Err != nil {
					transaction.Rollback()
				} else {
					if err := transaction.Commit(); err != nil {
						result.Err = model.NewAppError("SqlChannelStore.SaveMember", "store.sql_channel.save_member.commit_transaction.app_error", nil, err.Error(), http.StatusInternalServerError)
					}
					// If sucessfull record members have changed in channel
					if mu := <-s.extraUpdated(channel); mu.Err != nil {
						result.Err = mu.Err
					}
				}
			}
		}

		s.InvalidateAllChannelMembersForUser(member.UserId)
	})
}

func (s SqlChannelStore) saveMemberT(transaction *gorp.Transaction, member *model.ChannelMember, channel *model.Channel) store.StoreResult {
	result := store.StoreResult{}

	member.PreSave()
	if result.Err = member.IsValid(); result.Err != nil {
		return result
	}

	if err := transaction.Insert(member); err != nil {
		if IsUniqueConstraintError(err, []string{"ChannelId", "channelmembers_pkey"}) {
			result.Err = model.NewAppError("SqlChannelStore.SaveMember", "store.sql_channel.save_member.exists.app_error", nil, "channel_id="+member.ChannelId+", user_id="+member.UserId+", "+err.Error(), http.StatusBadRequest)
		} else {
			result.Err = model.NewAppError("SqlChannelStore.SaveMember", "store.sql_channel.save_member.save.app_error", nil, "channel_id="+member.ChannelId+", user_id="+member.UserId+", "+err.Error(), http.StatusInternalServerError)
		}
	} else {
		result.Data = member
	}

	return result
}

func (s SqlChannelStore) UpdateMember(member *model.ChannelMember) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		member.PreUpdate()

		if result.Err = member.IsValid(); result.Err != nil {
			return
		}

		if _, err := s.GetMaster().Update(member); err != nil {
			result.Err = model.NewAppError("SqlChannelStore.UpdateMember", "store.sql_channel.update_member.app_error", nil, "channel_id="+member.ChannelId+", "+"user_id="+member.UserId+", "+err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = member
		}
	})
}

func (s SqlChannelStore) GetMembers(channelId string, offset, limit int) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		var members model.ChannelMembers
		_, err := s.GetReplica().Select(&members, "SELECT * FROM ChannelMembers WHERE ChannelId = :ChannelId LIMIT :Limit OFFSET :Offset", map[string]interface{}{"ChannelId": channelId, "Limit": limit, "Offset": offset})
		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetMembers", "store.sql_channel.get_members.app_error", nil, "channel_id="+channelId+err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = &members
		}
	})
}

func (s SqlChannelStore) GetMember(channelId string, userId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		var member model.ChannelMember

		if err := s.GetReplica().SelectOne(&member, "SELECT * FROM ChannelMembers WHERE ChannelId = :ChannelId AND UserId = :UserId", map[string]interface{}{"ChannelId": channelId, "UserId": userId}); err != nil {
			if err == sql.ErrNoRows {
				result.Err = model.NewAppError("SqlChannelStore.GetMember", store.MISSING_CHANNEL_MEMBER_ERROR, nil, "channel_id="+channelId+"user_id="+userId+","+err.Error(), http.StatusNotFound)
			} else {
				result.Err = model.NewAppError("SqlChannelStore.GetMember", "store.sql_channel.get_member.app_error", nil, "channel_id="+channelId+"user_id="+userId+","+err.Error(), http.StatusInternalServerError)
			}
		} else {
			result.Data = &member
		}
	})
}

func (us SqlChannelStore) InvalidateAllChannelMembersForUser(userId string) {
	allChannelMembersForUserCache.Remove(userId)
}

func (us SqlChannelStore) IsUserInChannelUseCache(userId string, channelId string) bool {
	if cacheItem, ok := allChannelMembersForUserCache.Get(userId); ok {
		if us.metrics != nil {
			us.metrics.IncrementMemCacheHitCounter("All Channel Members for User")
		}
		ids := cacheItem.(map[string]string)
		if _, ok := ids[channelId]; ok {
			return true
		} else {
			return false
		}
	} else {
		if us.metrics != nil {
			us.metrics.IncrementMemCacheMissCounter("All Channel Members for User")
		}
	}

	if result := <-us.GetAllChannelMembersForUser(userId, true); result.Err != nil {
		l4g.Error("SqlChannelStore.IsUserInChannelUseCache: " + result.Err.Error())
		return false
	} else {
		ids := result.Data.(map[string]string)
		if _, ok := ids[channelId]; ok {
			return true
		} else {
			return false
		}
	}
}

func (s SqlChannelStore) GetMemberForPost(postId string, userId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		member := &model.ChannelMember{}
		if err := s.GetReplica().SelectOne(
			member,
			`SELECT
				ChannelMembers.*
			FROM
				ChannelMembers,
				Posts
			WHERE
				ChannelMembers.ChannelId = Posts.ChannelId
				AND ChannelMembers.UserId = :UserId
				AND Posts.Id = :PostId`, map[string]interface{}{"UserId": userId, "PostId": postId}); err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetMemberForPost", "store.sql_channel.get_member_for_post.app_error", nil, "postId="+postId+", err="+err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = member
		}
	})
}

type allChannelMember struct {
	ChannelId string
	Roles     string
}

func (s SqlChannelStore) GetAllChannelMembersForUser(userId string, allowFromCache bool) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		if allowFromCache {
			if cacheItem, ok := allChannelMembersForUserCache.Get(userId); ok {
				if s.metrics != nil {
					s.metrics.IncrementMemCacheHitCounter("All Channel Members for User")
				}
				result.Data = cacheItem.(map[string]string)
				return
			} else {
				if s.metrics != nil {
					s.metrics.IncrementMemCacheMissCounter("All Channel Members for User")
				}
			}
		} else {
			if s.metrics != nil {
				s.metrics.IncrementMemCacheMissCounter("All Channel Members for User")
			}
		}

		var data []allChannelMember
		_, err := s.GetReplica().Select(&data, "SELECT ChannelId, Roles FROM Channels, ChannelMembers WHERE Channels.Id = ChannelMembers.ChannelId AND ChannelMembers.UserId = :UserId AND Channels.DeleteAt = 0", map[string]interface{}{"UserId": userId})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetAllChannelMembersForUser", "store.sql_channel.get_channels.get.app_error", nil, "userId="+userId+", err="+err.Error(), http.StatusInternalServerError)
		} else {

			ids := make(map[string]string)
			for i := range data {
				ids[data[i].ChannelId] = data[i].Roles
			}

			result.Data = ids

			if allowFromCache {
				allChannelMembersForUserCache.AddWithExpiresInSecs(userId, ids, ALL_CHANNEL_MEMBERS_FOR_USER_CACHE_SEC)
			}
		}
	})
}

func (us SqlChannelStore) InvalidateCacheForChannelMembersNotifyProps(channelId string) {
	allChannelMembersNotifyPropsForChannelCache.Remove(channelId)
}

type allChannelMemberNotifyProps struct {
	UserId      string
	NotifyProps model.StringMap
}

func (s SqlChannelStore) GetAllChannelMembersNotifyPropsForChannel(channelId string, allowFromCache bool) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		if allowFromCache {
			if cacheItem, ok := allChannelMembersNotifyPropsForChannelCache.Get(channelId); ok {
				if s.metrics != nil {
					s.metrics.IncrementMemCacheHitCounter("All Channel Members Notify Props for Channel")
				}
				result.Data = cacheItem.(map[string]model.StringMap)
				return
			} else {
				if s.metrics != nil {
					s.metrics.IncrementMemCacheMissCounter("All Channel Members Notify Props for Channel")
				}
			}
		} else {
			if s.metrics != nil {
				s.metrics.IncrementMemCacheMissCounter("All Channel Members Notify Props for Channel")
			}
		}

		var data []allChannelMemberNotifyProps
		_, err := s.GetReplica().Select(&data, `
			SELECT ChannelMembers.UserId, ChannelMembers.NotifyProps
			FROM Channels, ChannelMembers
			WHERE Channels.Id = ChannelMembers.ChannelId AND ChannelMembers.ChannelId = :ChannelId`, map[string]interface{}{"ChannelId": channelId})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetAllChannelMembersPropsForChannel", "store.sql_channel.get_members.app_error", nil, "channelId="+channelId+", err="+err.Error(), http.StatusInternalServerError)
		} else {

			props := make(map[string]model.StringMap)
			for i := range data {
				props[data[i].UserId] = data[i].NotifyProps
			}

			result.Data = props

			allChannelMembersNotifyPropsForChannelCache.AddWithExpiresInSecs(channelId, props, ALL_CHANNEL_MEMBERS_NOTIFY_PROPS_FOR_CHANNEL_CACHE_SEC)
		}
	})
}

func (us SqlChannelStore) InvalidateMemberCount(channelId string) {
	channelMemberCountsCache.Remove(channelId)
}

func (s SqlChannelStore) GetMemberCountFromCache(channelId string) int64 {
	if cacheItem, ok := channelMemberCountsCache.Get(channelId); ok {
		if s.metrics != nil {
			s.metrics.IncrementMemCacheHitCounter("Channel Member Counts")
		}
		return cacheItem.(int64)
	} else {
		if s.metrics != nil {
			s.metrics.IncrementMemCacheMissCounter("Channel Member Counts")
		}
	}

	if result := <-s.GetMemberCount(channelId, true); result.Err != nil {
		return 0
	} else {
		return result.Data.(int64)
	}
}

func (s SqlChannelStore) GetMemberCount(channelId string, allowFromCache bool) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		if allowFromCache {
			if cacheItem, ok := channelMemberCountsCache.Get(channelId); ok {
				if s.metrics != nil {
					s.metrics.IncrementMemCacheHitCounter("Channel Member Counts")
				}
				result.Data = cacheItem.(int64)
				return
			} else {
				if s.metrics != nil {
					s.metrics.IncrementMemCacheMissCounter("Channel Member Counts")
				}
			}
		} else {
			if s.metrics != nil {
				s.metrics.IncrementMemCacheMissCounter("Channel Member Counts")
			}
		}

		count, err := s.GetReplica().SelectInt(`
			SELECT
				count(*)
			FROM
				ChannelMembers,
				Users
			WHERE
				ChannelMembers.UserId = Users.Id
				AND ChannelMembers.ChannelId = :ChannelId
				AND Users.DeleteAt = 0`, map[string]interface{}{"ChannelId": channelId})
		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetMemberCount", "store.sql_channel.get_member_count.app_error", nil, "channel_id="+channelId+", "+err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = count

			if allowFromCache {
				channelMemberCountsCache.AddWithExpiresInSecs(channelId, count, CHANNEL_MEMBERS_COUNTS_CACHE_SEC)
			}
		}
	})
}

func (s SqlChannelStore) RemoveMember(channelId string, userId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		// Grab the channel we are saving this member to
		if cr := <-s.Get(channelId, true); cr.Err != nil {
			result.Err = cr.Err
		} else {
			channel := cr.Data.(*model.Channel)

			_, err := s.GetMaster().Exec("DELETE FROM ChannelMembers WHERE ChannelId = :ChannelId AND UserId = :UserId", map[string]interface{}{"ChannelId": channelId, "UserId": userId})
			if err != nil {
				result.Err = model.NewAppError("SqlChannelStore.RemoveMember", "store.sql_channel.remove_member.app_error", nil, "channel_id="+channelId+", user_id="+userId+", "+err.Error(), http.StatusInternalServerError)
			} else {
				// If sucessfull record members have changed in channel
				if mu := <-s.extraUpdated(channel); mu.Err != nil {
					result.Err = mu.Err
				}
			}
		}
	})
}

func (s SqlChannelStore) PermanentDeleteMembersByUser(userId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		if _, err := s.GetMaster().Exec("DELETE FROM ChannelMembers WHERE UserId = :UserId", map[string]interface{}{"UserId": userId}); err != nil {
			result.Err = model.NewAppError("SqlChannelStore.RemoveMember", "store.sql_channel.permanent_delete_members_by_user.app_error", nil, "user_id="+userId+", "+err.Error(), http.StatusInternalServerError)
		}
	})
}

func (s SqlChannelStore) UpdateLastViewedAt(channelIds []string, userId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		props := make(map[string]interface{})

		updateIdQuery := ""
		for index, channelId := range channelIds {
			if len(updateIdQuery) > 0 {
				updateIdQuery += " OR "
			}

			props["channelId"+strconv.Itoa(index)] = channelId
			updateIdQuery += "ChannelId = :channelId" + strconv.Itoa(index)
		}

		selectIdQuery := strings.Replace(updateIdQuery, "ChannelId", "Id", -1)

		var lastPostAtTimes []struct {
			Id            string
			LastPostAt    int64
			TotalMsgCount int64
		}

		selectQuery := "SELECT Id, LastPostAt, TotalMsgCount FROM Channels WHERE (" + selectIdQuery + ")"

		if _, err := s.GetMaster().Select(&lastPostAtTimes, selectQuery, props); err != nil {
			result.Err = model.NewAppError("SqlChannelStore.UpdateLastViewedAt", "store.sql_channel.update_last_viewed_at.app_error", nil, "channel_ids="+strings.Join(channelIds, ",")+", user_id="+userId+", "+err.Error(), http.StatusInternalServerError)
			return
		}

		times := map[string]int64{}
		msgCountQuery := ""
		lastViewedQuery := ""
		for index, t := range lastPostAtTimes {
			times[t.Id] = t.LastPostAt

			props["msgCount"+strconv.Itoa(index)] = t.TotalMsgCount
			msgCountQuery += fmt.Sprintf("WHEN :channelId%d THEN GREATEST(MsgCount, :msgCount%d) ", index, index)

			props["lastViewed"+strconv.Itoa(index)] = t.LastPostAt
			lastViewedQuery += fmt.Sprintf("WHEN :channelId%d THEN GREATEST(LastViewedAt, :lastViewed%d) ", index, index)

			props["channelId"+strconv.Itoa(index)] = t.Id
		}

		var updateQuery string

		if s.DriverName() == model.DATABASE_DRIVER_POSTGRES {
			updateQuery = `UPDATE
				ChannelMembers
			SET
			    MentionCount = 0,
			    MsgCount = CAST(CASE ChannelId ` + msgCountQuery + ` END AS BIGINT),
			    LastViewedAt = CAST(CASE ChannelId ` + lastViewedQuery + ` END AS BIGINT),
			    LastUpdateAt = CAST(CASE ChannelId ` + lastViewedQuery + ` END AS BIGINT)
			WHERE
			        UserId = :UserId
			        AND (` + updateIdQuery + `)`
		} else if s.DriverName() == model.DATABASE_DRIVER_MYSQL {
			updateQuery = `UPDATE
				ChannelMembers
			SET
			    MentionCount = 0,
			    MsgCount = CASE ChannelId ` + msgCountQuery + ` END,
			    LastViewedAt = CASE ChannelId ` + lastViewedQuery + ` END,
			    LastUpdateAt = CASE ChannelId ` + lastViewedQuery + ` END
			WHERE
			        UserId = :UserId
			        AND (` + updateIdQuery + `)`
		}

		props["UserId"] = userId

		if _, err := s.GetMaster().Exec(updateQuery, props); err != nil {
			result.Err = model.NewAppError("SqlChannelStore.UpdateLastViewedAt", "store.sql_channel.update_last_viewed_at.app_error", nil, "channel_ids="+strings.Join(channelIds, ",")+", user_id="+userId+", "+err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = times
		}
	})
}

func (s SqlChannelStore) IncrementMentionCount(channelId string, userId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		_, err := s.GetMaster().Exec(
			`UPDATE
				ChannelMembers
			SET
				MentionCount = MentionCount + 1,
				LastUpdateAt = :LastUpdateAt
			WHERE
				UserId = :UserId
					AND ChannelId = :ChannelId`,
			map[string]interface{}{"ChannelId": channelId, "UserId": userId, "LastUpdateAt": model.GetMillis()})
		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.IncrementMentionCount", "store.sql_channel.increment_mention_count.app_error", nil, "channel_id="+channelId+", user_id="+userId+", "+err.Error(), http.StatusInternalServerError)
		}
	})
}

func (s SqlChannelStore) GetAll(teamId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		var data []*model.Channel
		_, err := s.GetReplica().Select(&data, "SELECT * FROM Channels WHERE TeamId = :TeamId AND Type != 'D' ORDER BY Name", map[string]interface{}{"TeamId": teamId})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetAll", "store.sql_channel.get_all.app_error", nil, "teamId="+teamId+", err="+err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = data
		}
	})
}

func (s SqlChannelStore) GetForPost(postId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		channel := &model.Channel{}
		if err := s.GetReplica().SelectOne(
			channel,
			`SELECT
				Channels.*
			FROM
				Channels,
				Posts
			WHERE
				Channels.Id = Posts.ChannelId
				AND Posts.Id = :PostId`, map[string]interface{}{"PostId": postId}); err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetForPost", "store.sql_channel.get_for_post.app_error", nil, "postId="+postId+", err="+err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = channel
		}
	})
}

func (s SqlChannelStore) AnalyticsTypeCount(teamId string, channelType string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		query := "SELECT COUNT(Id) AS Value FROM Channels WHERE Type = :ChannelType"

		if len(teamId) > 0 {
			query += " AND TeamId = :TeamId"
		}

		v, err := s.GetReplica().SelectInt(query, map[string]interface{}{"TeamId": teamId, "ChannelType": channelType})
		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.AnalyticsTypeCount", "store.sql_channel.analytics_type_count.app_error", nil, err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = v
		}
	})
}

func (s SqlChannelStore) AnalyticsDeletedTypeCount(teamId string, channelType string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		query := "SELECT COUNT(Id) AS Value FROM Channels WHERE Type = :ChannelType AND DeleteAt > 0"

		if len(teamId) > 0 {
			query += " AND TeamId = :TeamId"
		}

		v, err := s.GetReplica().SelectInt(query, map[string]interface{}{"TeamId": teamId, "ChannelType": channelType})
		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.AnalyticsDeletedTypeCount", "store.sql_channel.analytics_deleted_type_count.app_error", nil, err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = v
		}
	})
}

func (s SqlChannelStore) ExtraUpdateByUser(userId string, time int64) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		_, err := s.GetMaster().Exec(
			`UPDATE Channels SET ExtraUpdateAt = :Time
			WHERE Id IN (SELECT ChannelId FROM ChannelMembers WHERE UserId = :UserId);`,
			map[string]interface{}{"UserId": userId, "Time": time})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.extraUpdated", "store.sql_channel.extra_updated.app_error", nil, "user_id="+userId+", "+err.Error(), http.StatusInternalServerError)
		}
	})
}

func (s SqlChannelStore) GetMembersForUser(teamId string, userId string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		members := &model.ChannelMembers{}
		_, err := s.GetReplica().Select(members, `
            SELECT cm.*
            FROM ChannelMembers cm
            INNER JOIN Channels c
                ON c.Id = cm.ChannelId
                AND (c.TeamId = :TeamId OR c.TeamId = '')
                AND c.DeleteAt = 0
            WHERE cm.UserId = :UserId
		`, map[string]interface{}{"TeamId": teamId, "UserId": userId})

		if err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetMembersForUser", "store.sql_channel.get_members.app_error", nil, "teamId="+teamId+", userId="+userId+", err="+err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = members
		}
	})
}

func (s SqlChannelStore) SearchInTeam(teamId string, term string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		searchQuery := `
			SELECT
			    *
			FROM
			    Channels
			WHERE
			    TeamId = :TeamId
				AND Type = 'O'
				AND DeleteAt = 0
			    SEARCH_CLAUSE
			ORDER BY DisplayName
			LIMIT 100`

		*result = s.performSearch(searchQuery, term, map[string]interface{}{"TeamId": teamId})
	})
}

func (s SqlChannelStore) SearchMore(userId string, teamId string, term string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		searchQuery := `
			SELECT
			    *
			FROM
			    Channels
			WHERE
			    TeamId = :TeamId
				AND Type = 'O'
				AND DeleteAt = 0
			    AND Id NOT IN (SELECT
			        Channels.Id
			    FROM
			        Channels,
			        ChannelMembers
			    WHERE
			        Id = ChannelId
			        AND TeamId = :TeamId
			        AND UserId = :UserId
			        AND DeleteAt = 0)
			    SEARCH_CLAUSE
			ORDER BY DisplayName
			LIMIT 100`

		*result = s.performSearch(searchQuery, term, map[string]interface{}{"TeamId": teamId, "UserId": userId})
	})
}

func (s SqlChannelStore) performSearch(searchQuery string, term string, parameters map[string]interface{}) store.StoreResult {
	result := store.StoreResult{}

	// Copy the terms as we will need to prepare them differently for each search type.
	likeTerm := term
	fulltextTerm := term

	searchColumns := "Name, DisplayName"

	// These chars must be removed from the like query.
	for _, c := range ignoreLikeSearchChar {
		likeTerm = strings.Replace(likeTerm, c, "", -1)
	}

	// These chars must be escaped in the like query.
	for _, c := range escapeLikeSearchChar {
		likeTerm = strings.Replace(likeTerm, c, "*"+c, -1)
	}

	// These chars must be treated as spaces in the fulltext query.
	for _, c := range spaceFulltextSearchChar {
		fulltextTerm = strings.Replace(fulltextTerm, c, " ", -1)
	}

	if likeTerm == "" {
		// If the likeTerm is empty after preparing, then don't bother searching.
		searchQuery = strings.Replace(searchQuery, "SEARCH_CLAUSE", "", 1)
	} else {
		// Prepare the LIKE portion of the query.
		var searchFields []string
		for _, field := range strings.Split(searchColumns, ", ") {
			if s.DriverName() == model.DATABASE_DRIVER_POSTGRES {
				searchFields = append(searchFields, fmt.Sprintf("lower(%s) LIKE lower(%s) escape '*'", field, ":LikeTerm"))
			} else {
				searchFields = append(searchFields, fmt.Sprintf("%s LIKE %s escape '*'", field, ":LikeTerm"))
			}
		}
		likeSearchClause := fmt.Sprintf("(%s)", strings.Join(searchFields, " OR "))
		parameters["LikeTerm"] = fmt.Sprintf("%s%%", likeTerm)

		// Prepare the FULLTEXT portion of the query.
		if s.DriverName() == model.DATABASE_DRIVER_POSTGRES {
			splitTerm := strings.Fields(fulltextTerm)
			for i, t := range strings.Fields(fulltextTerm) {
				if i == len(splitTerm)-1 {
					splitTerm[i] = t + ":*"
				} else {
					splitTerm[i] = t + ":* &"
				}
			}

			fulltextTerm = strings.Join(splitTerm, " ")

			fulltextSearchClause := fmt.Sprintf("((%s) @@ to_tsquery(:FulltextTerm))", convertMySQLFullTextColumnsToPostgres(searchColumns))
			searchQuery = strings.Replace(searchQuery, "SEARCH_CLAUSE", "AND ("+likeSearchClause+" OR "+fulltextSearchClause+")", 1)
		} else if s.DriverName() == model.DATABASE_DRIVER_MYSQL {
			splitTerm := strings.Fields(fulltextTerm)
			for i, t := range strings.Fields(fulltextTerm) {
				splitTerm[i] = "+" + t + "*"
			}

			fulltextTerm = strings.Join(splitTerm, " ")

			fulltextSearchClause := fmt.Sprintf("MATCH(%s) AGAINST (:FulltextTerm IN BOOLEAN MODE)", searchColumns)
			searchQuery = strings.Replace(searchQuery, "SEARCH_CLAUSE", fmt.Sprintf("AND (%s OR %s)", likeSearchClause, fulltextSearchClause), 1)
		}
	}

	parameters["FulltextTerm"] = fulltextTerm

	var channels model.ChannelList

	if _, err := s.GetReplica().Select(&channels, searchQuery, parameters); err != nil {
		result.Err = model.NewAppError("SqlChannelStore.Search", "store.sql_channel.search.app_error", nil, "term="+term+", "+", "+err.Error(), http.StatusInternalServerError)
	} else {
		result.Data = &channels
	}

	return result
}

func (s SqlChannelStore) GetMembersByIds(channelId string, userIds []string) store.StoreChannel {
	return store.Do(func(result *store.StoreResult) {
		var members model.ChannelMembers
		props := make(map[string]interface{})
		idQuery := ""

		for index, userId := range userIds {
			if len(idQuery) > 0 {
				idQuery += ", "
			}

			props["userId"+strconv.Itoa(index)] = userId
			idQuery += ":userId" + strconv.Itoa(index)
		}

		props["ChannelId"] = channelId

		if _, err := s.GetReplica().Select(&members, "SELECT * FROM ChannelMembers WHERE ChannelId = :ChannelId AND UserId IN ("+idQuery+")", props); err != nil {
			result.Err = model.NewAppError("SqlChannelStore.GetMembersByIds", "store.sql_channel.get_members_by_ids.app_error", nil, "channelId="+channelId+" "+err.Error(), http.StatusInternalServerError)
		} else {
			result.Data = &members

		}
	})
}