summaryrefslogtreecommitdiff
path: root/include/modules.h
blob: 8bc52b683db6b51acecf12570b1f20a96e1837bd (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
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
 * See: http://www.inspircd.org/wiki/index.php/Credits
 *
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

#ifndef __MODULES_H
#define __MODULES_H

/** Used with OnAccessCheck() method of modules
 */
enum AccessControlType {
	ACR_DEFAULT,		// Do default action (act as if the module isnt even loaded)
	ACR_DENY,		// deny the action
	ACR_ALLOW,		// allow the action
	AC_KICK,		// a user is being kicked
	AC_DEOP,		// a user is being deopped
	AC_OP,			// a user is being opped
	AC_VOICE,		// a user is being voiced
	AC_DEVOICE,		// a user is being devoiced
	AC_HALFOP,		// a user is being halfopped
	AC_DEHALFOP,		// a user is being dehalfopped
	AC_INVITE,		// a user is being invited
	AC_GENERAL_MODE		// a channel mode is being changed
};

/** Used to define a set of behavior bits for a module
 */
enum ModuleFlags {
	VF_STATIC = 1,		// module is static, cannot be /unloadmodule'd
	VF_VENDOR = 2,		// module is a vendor module (came in the original tarball, not 3rd party)
	VF_SERVICEPROVIDER = 4,	// module provides a service to other modules (can be a dependency)
	VF_COMMON = 8		// module needs to be common on all servers in a network to link
};

enum WriteModeFlags {
	WM_AND = 1,
	WM_OR = 2
};

enum TargetTypeFlags {
	TYPE_USER = 1,
	TYPE_CHANNEL,
	TYPE_SERVER,
	TYPE_OTHER
};

enum MessageType {
	MSG_PRIVMSG = 0,
	MSG_NOTICE = 1
};

#include "globals.h"
#include "dynamic.h"
#include "base.h"
#include "ctables.h"
#include "inspsocket.h"
#include <string>
#include <deque>
#include <sstream>
#include "timer.h"
#include "mode.h"
#include "dns.h"

/** If you change the module API, change this value.
 * If you have enabled ipv6, the sizes of structs is
 * different, and modules will be incompatible with
 * ipv4 servers, so this value will be ten times as
 * high on ipv6 servers.
 */
#define NATIVE_API_VERSION 11011
#ifdef IPV6
#define API_VERSION (NATIVE_API_VERSION * 10)
#else
#define API_VERSION (NATIVE_API_VERSION * 1)
#endif

class ServerConfig;

/* Forward-delacare module for ModuleMessage etc
 */
class Module;

/** Low level definition of a FileReader classes file cache area
 */
typedef std::deque<std::string> file_cache;
typedef file_cache string_list;

/** Holds a list of 'published features' for modules.
 */
typedef std::map<std::string,Module*> featurelist;

/** Holds a list of modules which implement an interface
 */
typedef std::deque<Module*> modulelist;

/** Holds a list of all modules which implement interfaces, by interface name
 */
typedef std::map<std::string, std::pair<int, modulelist> > interfacelist;

/**
 * This #define allows us to call a method in all
 * loaded modules in a readable simple way, e.g.:
 * 'FOREACH_MOD(I_OnXonnwxr,OnConnect(user));'
 */
#define FOREACH_MOD(y,x) if (ServerInstance->Config->global_implementation[y] > 0) { \
	for (int _i = 0; _i <= ServerInstance->GetModuleCount(); _i++) { \
	if (ServerInstance->Config->implement_lists[_i][y]) \
		try \
		{ \
			ServerInstance->modules[_i]->x ; \
		} \
		catch (CoreException& modexcept) \
		{ \
			ServerInstance->Log(DEFAULT,"Exception cought: %s",modexcept.GetReason()); \
		} \
	} \
  }

#define FOREACH_MOD_I(z,y,x) if (z->Config->global_implementation[y] > 0) { \
	for (int _i = 0; _i <= z->GetModuleCount(); _i++) { \
		if (z->Config->implement_lists[_i][y]) \
		try \
		{ \
			z->modules[_i]->x ; \
		} \
		catch (CoreException& modexcept) \
		{ \
			z->Log(DEFAULT,"Exception cought: %s",modexcept.GetReason()); \
		} \
	} \
}
/**
 *  This define is similar to the one above but returns a result in MOD_RESULT.
 * The first module to return a nonzero result is the value to be accepted,
 * and any modules after are ignored.
 */
#define FOREACH_RESULT(y,x) { if (ServerInstance->Config->global_implementation[y] > 0) { \
			MOD_RESULT = 0; \
			for (int _i = 0; _i <= ServerInstance->GetModuleCount(); _i++) { \
			if (ServerInstance->Config->implement_lists[_i][y]) { \
				try \
				{ \
					int res = ServerInstance->modules[_i]->x ; \
					if (res != 0) { \
						MOD_RESULT = res; \
						break; \
					} \
				} \
				catch (CoreException& modexcept) \
				{ \
					ServerInstance->Log(DEFAULT,"Exception cought: %s",modexcept.GetReason()); \
				} \
			} \
		} \
	} \
 }

#define FOREACH_RESULT_I(z,y,x) { if (z->Config->global_implementation[y] > 0) { \
			MOD_RESULT = 0; \
			for (int _i = 0; _i <= z->GetModuleCount(); _i++) { \
			if (z->Config->implement_lists[_i][y]) { \
				try \
				{ \
					int res = z->modules[_i]->x ; \
					if (res != 0) { \
						MOD_RESULT = res; \
						break; \
					} \
				} \
				catch (CoreException& modexcept) \
				{ \
					z->Log(DEBUG,"Exception cought: %s",modexcept.GetReason()); \
				} \
			} \
		} \
	} \
}

#define FD_MAGIC_NUMBER -42

// useful macros

#define IS_LOCAL(x) ((x->GetFd() > -1) && (x->GetFd() <= MAX_DESCRIPTORS))
#define IS_REMOTE(x) (x->GetFd() < 0)
#define IS_MODULE_CREATED(x) (x->GetFd() == FD_MAGIC_NUMBER)

/** Holds a module's Version information
 *  The four members (set by the constructor only) indicate details as to the version number
 *  of a module. A class of type Version is returned by the GetVersion method of the Module class.
 */
class Version : public classbase
{
 public:
	 const int Major, Minor, Revision, Build, Flags, API;
	 Version(int major, int minor, int revision, int build, int flags, int api_ver);
};

/** The ModuleMessage class is the base class of Request and Event
 * This class is used to represent a basic data structure which is passed
 * between modules for safe inter-module communications.
 */
class ModuleMessage : public Extensible
{
 public:
	virtual ~ModuleMessage() {};
};

/** The Request class is a unicast message directed at a given module.
 * When this class is properly instantiated it may be sent to a module
 * using the Send() method, which will call the given module's OnRequest
 * method with this class as its parameter.
 */
class Request : public ModuleMessage
{
 protected:
	/** This member holds a pointer to arbitary data set by the emitter of the message
	 */
	char* data;
 	/** This should be a null-terminated string identifying the type of request,
 	 * all modules should define this and use it to determine the nature of the
 	 * request before they attempt to cast the Request in any way.
 	 */
 	const char* id;
	/** This is a pointer to the sender of the message, which can be used to
	 * directly trigger events, or to create a reply.
	 */
	Module* source;
	/** The single destination of the Request
	 */
	Module* dest;
 public:
	/** Create a new Request
 	 * This is for the 'old' way of casting whatever the data is
 	 * to char* and hoping you get the right thing at the other end.
 	 * This is slowly being depreciated in favor of the 'new' way.
	 */
	Request(char* anydata, Module* src, Module* dst);
 	/** Create a new Request
 	 * This is for the 'new' way of defining a subclass
 	 * of Request and defining it in a common header,
	 * passing an object of your Request subclass through
 	 * as a Request* and using the ID string to determine
 	 * what to cast it back to and the other end. This is
 	 * much safer as there are no casts not confirmed by
 	 * the ID string, and all casts are child->parent and
 	 * can be checked at runtime with dynamic_cast<>()
 	 */
 	Request(Module* src, Module* dst, const char* idstr);
	/** Fetch the Request data
	 */
	char* GetData();
 	/** Fetch the ID string
	 */
	const char* GetId();
	/** Fetch the request source
	 */
	Module* GetSource();
	/** Fetch the request destination (should be 'this' in the receiving module)
	 */
	Module* GetDest();
	/** Send the Request.
	 * Upon returning the result will be arbitary data returned by the module you
	 * sent the request to. It is up to your module to know what this data is and
	 * how to deal with it.
	 */
	char* Send();
};


/** The Event class is a unicast message directed at all modules.
 * When the class is properly instantiated it may be sent to all modules
 * using the Send() method, which will trigger the OnEvent method in
 * all modules passing the object as its parameter.
 */
class Event : public ModuleMessage
{
 protected:
	/** This member holds a pointer to arbitary data set by the emitter of the message
	 */
	char* data;
	/** This is a pointer to the sender of the message, which can be used to
	 * directly trigger events, or to create a reply.
	 */
	Module* source;
	/** The event identifier.
	 * This is arbitary text which should be used to distinguish
	 * one type of event from another.
	 */
	std::string id;
 public:
	/** Create a new Event
	 */
	Event(char* anydata, Module* src, const std::string &eventid);
	/** Get the Event data
	 */
	char* GetData();
	/** Get the event Source
	 */
	Module* GetSource();
	/** Get the event ID.
	 * Use this to determine the event type for safe casting of the data
	 */
	std::string GetEventID();
	/** Send the Event.
	 * The return result of an Event::Send() will always be NULL as
	 * no replies are expected.
	 */
	char* Send(InspIRCd* ServerInstance);
};

/** This class can be used on its own to represent an exception, or derived to represent a module-specific exception.
 * When a module whishes to abort, e.g. within a constructor, it should throw an exception using ModuleException or
 * a class derived from ModuleException. If a module throws an exception during its constructor, the module will not
 * be loaded. If this happens, the error message returned by ModuleException::GetReason will be displayed to the user
 * attempting to load the module, or dumped to the console if the ircd is currently loading for the first time.
 */
class CoreException : public std::exception
{
 protected:
	/** Holds the error message to be displayed
	 */
	const std::string err;
	const std::string source;
 public:
	/** Default constructor, just uses the error mesage 'Core threw an exception'.
	 */
	CoreException() : err("Core threw an exception"), source("The core") {}
	/** This constructor can be used to specify an error message before throwing.
	 */
	CoreException(const std::string &message) : err(message), source("The core") {}
	/** This constructor can be used to specify an error message before throwing,
	 * and to specify the source of the exception.
	 */
	CoreException(const std::string &message, const std::string &src) : err(message), source(src) {}
	/** This destructor solves world hunger, cancels the world debt, and causes the world to end.
	 * Actually no, it does nothing. Never mind.
	 * @throws Nothing!
	 */
	virtual ~CoreException() throw() {};
	/** Returns the reason for the exception.
	 * The module should probably put something informative here as the user will see this upon failure.
	 */
	virtual const char* GetReason()
	{
		return err.c_str();
	}

	virtual const char* GetSource()
	{
		return source.c_str();
	}
};

class ModuleException : public CoreException
{
 public:
	/** Default constructor, just uses the error mesage 'Module threw an exception'.
	 */
	ModuleException() : CoreException("Module threw an exception", "A Module") {}

	/** This constructor can be used to specify an error message before throwing.
	 */
	ModuleException(const std::string &message) : CoreException(message, "A Module") {}
	/** This destructor solves world hunger, cancels the world debt, and causes the world to end.
	 * Actually no, it does nothing. Never mind.
	 * @throws Nothing!
	 */
	virtual ~ModuleException() throw() {};
};

/** Priority types which can be returned from Module::Prioritize()
 */
enum Priority { PRIORITY_FIRST, PRIORITY_DONTCARE, PRIORITY_LAST, PRIORITY_BEFORE, PRIORITY_AFTER };

/** Implementation-specific flags which may be set in Module::Implements()
 */
enum Implementation {	I_OnUserConnect, I_OnUserQuit, I_OnUserDisconnect, I_OnUserJoin, I_OnUserPart, I_OnRehash, I_OnServerRaw, 
			I_OnUserPreJoin, I_OnUserPreKick, I_OnUserKick, I_OnOper, I_OnInfo, I_OnWhois, I_OnUserPreInvite,
			I_OnUserInvite, I_OnUserPreMessage, I_OnUserPreNotice, I_OnUserPreNick, I_OnUserMessage, I_OnUserNotice, I_OnMode,
			I_OnGetServerDescription, I_OnSyncUser, I_OnSyncChannel, I_OnSyncChannelMetaData, I_OnSyncUserMetaData,
			I_OnDecodeMetaData, I_ProtoSendMode, I_ProtoSendMetaData, I_OnWallops, I_OnChangeHost, I_OnChangeName, I_OnAddGLine,
			I_OnAddZLine, I_OnAddQLine, I_OnAddKLine, I_OnAddELine, I_OnDelGLine, I_OnDelZLine, I_OnDelKLine, I_OnDelELine, I_OnDelQLine,
			I_OnCleanup, I_OnUserPostNick, I_OnAccessCheck, I_On005Numeric, I_OnKill, I_OnRemoteKill, I_OnLoadModule, I_OnUnloadModule,
			I_OnBackgroundTimer, I_OnPreCommand, I_OnCheckReady, I_OnUserRrgister, I_OnCheckInvite,
			I_OnCheckKey, I_OnCheckLimit, I_OnCheckBan, I_OnStats, I_OnChangeLocalUserHost, I_OnChangeLocalUserGecos, I_OnLocalTopicChange,
			I_OnPostLocalTopicChange, I_OnEvent, I_OnRequest, I_OnOperCompre, I_OnGlobalOper, I_OnPostConnect, I_OnAddBan, I_OnDelBan,
			I_OnRawSocketAccept, I_OnRawSocketClose, I_OnRawSocketWrite, I_OnRawSocketRead, I_OnChangeLocalUserGECOS, I_OnUserRegister,
			I_OnOperCompare, I_OnChannelDelete, I_OnPostOper, I_OnSyncOtherMetaData, I_OnSetAway, I_OnCancelAway, I_OnUserList,
			I_OnPostCommand, I_OnPostJoin, I_OnWhoisLine, I_OnBuildExemptList, I_OnRawSocketConnect, I_OnGarbageCollect };

/** Base class for all InspIRCd modules
 *  This class is the base class for InspIRCd modules. All modules must inherit from this class,
 *  its methods will be called when irc server events occur. class inherited from module must be
 *  instantiated by the ModuleFactory class (see relevent section) for the module to be initialised.
 */
class Module : public Extensible
{
 protected:
	InspIRCd* ServerInstance;
 public:

	/** Default constructor
	 * Creates a module class.
	 * @param Me An instance of the InspIRCd class which will be saved into ServerInstance for your use
	 * \exception ModuleException Throwing this class, or any class derived from ModuleException, causes loading of the module to abort.
	 */
	Module(InspIRCd* Me);

	/** Default destructor
	 * destroys a module class
	 */
	virtual ~Module();

	/** Returns the version number of a Module.
	 * The method should return a Version object with its version information assigned via
	 * Version::Version
	 */
	virtual Version GetVersion();

	/** The Implements function specifies which methods a module should receive events for.
	 * The char* parameter passed to this function contains a set of true or false values
	 * (1 or 0) which indicate wether each function is implemented. You must use the Iimplementation
	 * enum (documented elsewhere on this page) to mark functions as active. For example, to
	 * receive events for OnUserJoin():
	 *
	 * Implements[I_OnUserJoin] = 1;
	 *
	 * @param The implement list
	 */
	virtual void Implements(char* Implements);

	/** Used to set the 'priority' of a module (e.g. when it is called in relation to other modules.
	 * Some modules prefer to be called before other modules, due to their design. For example, a
	 * module which is expected to operate on complete information would expect to be placed last, so
	 * that any other modules which wish to adjust that information would execute before it, to be sure
	 * its information is correct. You can change your module's priority by returning one of:
	 *
	 * PRIORITY_FIRST - To place your module first in the list
	 * 
	 * PRIORITY_LAST - To place your module last in the list
	 *
	 * PRIORITY_DONTCARE - To leave your module as it is (this is the default value, if you do not implement this function)
	 *
	 * The result of InspIRCd::PriorityBefore() - To move your module before another named module
	 *
	 * The result of InspIRCd::PriorityLast() - To move your module after another named module
	 *
	 * For a good working example of this method call, please see src/modules/m_spanningtree.cpp
	 * and src/modules/m_hostchange.so which make use of it. It is highly recommended that unless
	 * your module has a real need to reorder its priority, it should not implement this function,
	 * as many modules changing their priorities can make the system redundant.
	 */
	virtual Priority Prioritize();

	/** Called when a user connects.
	 * The details of the connecting user are available to you in the parameter userrec *user
	 * @param user The user who is connecting
	 */
	virtual void OnUserConnect(userrec* user);

	/** Called when a user quits.
	 * The details of the exiting user are available to you in the parameter userrec *user
	 * This event is only called when the user is fully registered when they quit. To catch
	 * raw disconnections, use the OnUserDisconnect method.
	 * @param user The user who is quitting
	 * @param message The user's quit message
	 */
	virtual void OnUserQuit(userrec* user, const std::string &message);

	/** Called whenever a user's socket is closed.
	 * The details of the exiting user are available to you in the parameter userrec *user
	 * This event is called for all users, registered or not, as a cleanup method for modules
	 * which might assign resources to user, such as dns lookups, objects and sockets.
	 * @param user The user who is disconnecting
	 */
	virtual void OnUserDisconnect(userrec* user);

	/** Called whenever a channel is deleted, either by QUIT, KICK or PART.
	 * @param chan The channel being deleted
	 */
	virtual void OnChannelDelete(chanrec* chan);

	/** Called when a user joins a channel.
	 * The details of the joining user are available to you in the parameter userrec *user,
	 * and the details of the channel they have joined is available in the variable chanrec *channel
	 * @param user The user who is joining
	 * @param channel The channel being joined
	 */
	virtual void OnUserJoin(userrec* user, chanrec* channel);

	/** Called after a user joins a channel
	 * Identical to OnUserJoin, but called immediately afterwards, when any linking module has
	 * seen the join.
	 * @param user The user who is joining
	 * @param channel The channel being joined
	 */
	virtual void OnPostJoin(userrec* user, chanrec* channel);

	/** Called when a user parts a channel.
	 * The details of the leaving user are available to you in the parameter userrec *user,
	 * and the details of the channel they have left is available in the variable chanrec *channel
	 * @param user The user who is parting
	 * @param channel The channel being parted
	 * @param partmessage The part message, or an empty string
	 */
	virtual void OnUserPart(userrec* user, chanrec* channel, const std::string &partmessage);

	/** Called on rehash.
	 * This method is called prior to a /REHASH or when a SIGHUP is received from the operating
	 * system. You should use it to reload any files so that your module keeps in step with the
	 * rest of the application. If a parameter is given, the core has done nothing. The module
	 * receiving the event can decide if this parameter has any relevence to it.
	 * @param user The user performing the rehash, if any -- if this is server initiated, the
	 * value of this variable will be NULL.
	 * @param parameter The (optional) parameter given to REHASH from the user.
	 */
 	virtual void OnRehash(userrec* user, const std::string &parameter);

	/** Called when a raw command is transmitted or received.
	 * This method is the lowest level of handler available to a module. It will be called with raw
	 * data which is passing through a connected socket. If you wish, you may munge this data by changing
	 * the string parameter "raw". If you do this, after your function exits it will immediately be
	 * cut down to 510 characters plus a carriage return and linefeed. For INBOUND messages only (where
	 * inbound is set to true) the value of user will be the userrec of the connection sending the
	 * data. This is not possible for outbound data because the data may be being routed to multiple targets.
	 * @param raw The raw string in RFC1459 format
	 * @param inbound A flag to indicate wether the data is coming into the daemon or going out to the user
	 * @param user The user record sending the text, when inbound == true.
	 */
 	virtual void OnServerRaw(std::string &raw, bool inbound, userrec* user);

	/** Called whenever a user is about to join a channel, before any processing is done.
	 * Returning a value of 1 from this function stops the process immediately, causing no
	 * output to be sent to the user by the core. If you do this you must produce your own numerics,
	 * notices etc. This is useful for modules which may want to mimic +b, +k, +l etc. Returning -1 from
	 * this function forces the join to be allowed, bypassing restrictions such as banlists, invite, keys etc.
	 *
	 * IMPORTANT NOTE!
	 *
	 * If the user joins a NEW channel which does not exist yet, OnUserPreJoin will be called BEFORE the channel
	 * record is created. This will cause chanrec* chan to be NULL. There is very little you can do in form of
	 * processing on the actual channel record at this point, however the channel NAME will still be passed in
	 * char* cname, so that you could for example implement a channel blacklist or whitelist, etc.
	 * @param user The user joining the channel
	 * @param chan If the  channel is a new channel, this will be NULL, otherwise it will be a pointer to the channel being joined
	 * @param cname The channel name being joined. For new channels this is valid where chan is not.
	 * @param privs A string containing the users privilages when joining the channel. For new channels this will contain "@".
	 * You may alter this string to alter the user's modes on the channel.
	 * @return 1 To prevent the join, 0 to allow it.
	 */
	virtual int OnUserPreJoin(userrec* user, chanrec* chan, const char* cname, std::string &privs);
	
	/** Called whenever a user is about to be kicked.
	 * Returning a value of 1 from this function stops the process immediately, causing no
	 * output to be sent to the user by the core. If you do this you must produce your own numerics,
	 * notices etc.
	 * @param source The user issuing the kick
	 * @param user The user being kicked
	 * @param chan The channel the user is being kicked from
	 * @param reason The kick reason
	 * @return 1 to prevent the kick, 0 to continue normally, -1 to explicitly allow the kick regardless of normal operation
	 */
	virtual int OnUserPreKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason);

	/** Called whenever a user is kicked.
	 * If this method is called, the kick is already underway and cannot be prevented, so
	 * to prevent a kick, please use Module::OnUserPreKick instead of this method.
	 * @param source The user issuing the kick
	 * @param user The user being kicked
	 * @param chan The channel the user is being kicked from
	 * @param reason The kick reason
	 */
	virtual void OnUserKick(userrec* source, userrec* user, chanrec* chan, const std::string &reason);

	/** Called whenever a user opers locally.
	 * The userrec will contain the oper mode 'o' as this function is called after any modifications
	 * are made to the user's structure by the core.
	 * @param user The user who is opering up
	 * @param opertype The opers type name
	 */
	virtual void OnOper(userrec* user, const std::string &opertype);

	/** Called after a user opers locally.
	 * This is identical to Module::OnOper(), except it is called after OnOper so that other modules
	 * can be gauranteed to already have processed the oper-up, for example m_spanningtree has sent
	 * out the OPERTYPE, etc.
	 * @param user The user who is opering up
	 * @param opertype The opers type name
	 */
	virtual void OnPostOper(userrec* user, const std::string &opertype);
	
	/** Called whenever a user types /INFO.
	 * The userrec will contain the information of the user who typed the command. Modules may use this
	 * method to output their own credits in /INFO (which is the ircd's version of an about box).
	 * It is purposefully not possible to modify any info that has already been output, or halt the list.
	 * You must write a 371 numeric to the user, containing your info in the following format:
	 *
	 * &lt;nick&gt; :information here
	 *
	 * @param user The user issuing /INFO
	 */
	virtual void OnInfo(userrec* user);
	
	/** Called whenever a /WHOIS is performed on a local user.
	 * The source parameter contains the details of the user who issued the WHOIS command, and
	 * the dest parameter contains the information of the user they are whoising.
	 * @param source The user issuing the WHOIS command
	 * @param dest The user who is being WHOISed
	 */
	virtual void OnWhois(userrec* source, userrec* dest);
	
	/** Called whenever a user is about to invite another user into a channel, before any processing is done.
	 * Returning 1 from this function stops the process immediately, causing no
	 * output to be sent to the user by the core. If you do this you must produce your own numerics,
	 * notices etc. This is useful for modules which may want to filter invites to channels.
	 * @param source The user who is issuing the INVITE
	 * @param dest The user being invited
	 * @param channel The channel the user is being invited to
	 * @return 1 to deny the invite, 0 to allow
	 */
	virtual int OnUserPreInvite(userrec* source,userrec* dest,chanrec* channel);
	
	/** Called after a user has been successfully invited to a channel.
	 * You cannot prevent the invite from occuring using this function, to do that,
	 * use OnUserPreInvite instead.
	 * @param source The user who is issuing the INVITE
	 * @param dest The user being invited
	 * @param channel The channel the user is being invited to
	 */
	virtual void OnUserInvite(userrec* source,userrec* dest,chanrec* channel);
	
	/** Called whenever a user is about to PRIVMSG A user or a channel, before any processing is done.
	 * Returning any nonzero value from this function stops the process immediately, causing no
	 * output to be sent to the user by the core. If you do this you must produce your own numerics,
	 * notices etc. This is useful for modules which may want to filter or redirect messages.
	 * target_type can be one of TYPE_USER or TYPE_CHANNEL. If the target_type value is a user,
	 * you must cast dest to a userrec* otherwise you must cast it to a chanrec*, this is the details
	 * of where the message is destined to be sent.
	 * @param user The user sending the message
	 * @param dest The target of the message (chanrec* or userrec*)
	 * @param target_type The type of target (TYPE_USER or TYPE_CHANNEL)
	 * @param text Changeable text being sent by the user
	 * @param status The status being used, e.g. PRIVMSG @#chan has status== '@', 0 to send to everyone.
	 * @param exempt_list A list of users not to send to. For channel messages, this will usually contain just the sender.
	 * It will be ignored for private messages.
	 * @return 1 to deny the NOTICE, 0 to allow it
	 */
	virtual int OnUserPreMessage(userrec* user,void* dest,int target_type, std::string &text,char status, CUList &exempt_list);

	/** Called whenever a user is about to NOTICE A user or a channel, before any processing is done.
	 * Returning any nonzero value from this function stops the process immediately, causing no
	 * output to be sent to the user by the core. If you do this you must produce your own numerics,
	 * notices etc. This is useful for modules which may want to filter or redirect messages.
	 * target_type can be one of TYPE_USER or TYPE_CHANNEL. If the target_type value is a user,
	 * you must cast dest to a userrec* otherwise you must cast it to a chanrec*, this is the details
	 * of where the message is destined to be sent.
	 * You may alter the message text as you wish before relinquishing control to the next module
	 * in the chain, and if no other modules block the text this altered form of the text will be sent out
	 * to the user and possibly to other servers.
	 * @param user The user sending the message
	 * @param dest The target of the message (chanrec* or userrec*)
	 * @param target_type The type of target (TYPE_USER or TYPE_CHANNEL)
	 * @param text Changeable text being sent by the user
	 * @param status The status being used, e.g. PRIVMSG @#chan has status== '@', 0 to send to everyone.
	 * @param exempt_list A list of users not to send to. For channel notices, this will usually contain just the sender.
	 * It will be ignored for private notices.
	 * @return 1 to deny the NOTICE, 0 to allow it
	 */
	virtual int OnUserPreNotice(userrec* user,void* dest,int target_type, std::string &text,char status, CUList &exempt_list);

	/** Called whenever the server wants to build the exemption list for a channel, but is not directly doing a PRIVMSG or NOTICE.
	 * For example, the spanningtree protocol will call this event when passing a privmsg on (but not processing it directly).
	 * @param message_type The message type, either MSG_PRIVMSG or MSG_NOTICE
	 * @param chan The channel to build the exempt list of
	 * @param sender The original sender of the PRIVMSG or NOTICE
	 * @param status The status char to be used for the channel list
	 * @param exempt_list The exempt list to be populated
	 */
	virtual void OnBuildExemptList(MessageType message_type, chanrec* chan, userrec* sender, char status, CUList &exempt_list);
	
	/** Called before any nickchange, local or remote. This can be used to implement Q-lines etc.
	 * Please note that although you can see remote nickchanges through this function, you should
	 * NOT make any changes to the userrec if the user is a remote user as this may cause a desnyc.
	 * check user->server before taking any action (including returning nonzero from the method).
	 * If your method returns nonzero, the nickchange is silently forbidden, and it is down to your
	 * module to generate some meaninful output.
	 * @param user The username changing their nick
	 * @param newnick Their new nickname
	 * @return 1 to deny the change, 0 to allow
	 */
	virtual int OnUserPreNick(userrec* user, const std::string &newnick);

	/** Called after any PRIVMSG sent from a user.
	 * The dest variable contains a userrec* if target_type is TYPE_USER and a chanrec*
	 * if target_type is TYPE_CHANNEL.
	 * @param user The user sending the message
	 * @param dest The target of the message
	 * @param target_type The type of target (TYPE_USER or TYPE_CHANNEL)
	 * @param text the text being sent by the user
	 * @param status The status being used, e.g. PRIVMSG @#chan has status== '@', 0 to send to everyone.
	 */
	virtual void OnUserMessage(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list);

	/** Called after any NOTICE sent from a user.
	 * The dest variable contains a userrec* if target_type is TYPE_USER and a chanrec*
	 * if target_type is TYPE_CHANNEL.
	 * @param user The user sending the message
	 * @param dest The target of the message
	 * @param target_type The type of target (TYPE_USER or TYPE_CHANNEL)
	 * @param text the text being sent by the user
	 * @param status The status being used, e.g. NOTICE @#chan has status== '@', 0 to send to everyone.
	 */
	virtual void OnUserNotice(userrec* user, void* dest, int target_type, const std::string &text, char status, const CUList &exempt_list);

	/** Called after every MODE command sent from a user
	 * The dest variable contains a userrec* if target_type is TYPE_USER and a chanrec*
	 * if target_type is TYPE_CHANNEL. The text variable contains the remainder of the
	 * mode string after the target, e.g. "+wsi" or "+ooo nick1 nick2 nick3".
	 * @param user The user sending the MODEs
	 * @param dest The target of the modes (userrec* or chanrec*)
	 * @param target_type The type of target (TYPE_USER or TYPE_CHANNEL)
	 * @param text The actual modes and their parameters if any
	 */
	virtual void OnMode(userrec* user, void* dest, int target_type, const std::string &text);

	/** Allows modules to alter or create server descriptions
	 * Whenever a module requires a server description, for example for display in
	 * WHOIS, this function is called in all modules. You may change or define the
	 * description given in std::string &description. If you do, this description
	 * will be shown in the WHOIS fields.
	 * @param servername The servername being searched for
	 * @param description Alterable server description for this server
	 */
	virtual void OnGetServerDescription(const std::string &servername,std::string &description);

	/** Allows modules to synchronize data which relates to users during a netburst.
	 * When this function is called, it will be called from the module which implements
	 * the linking protocol. This currently is m_spanningtree.so. A pointer to this module
	 * is given in Module* proto, so that you may call its methods such as ProtoSendMode
	 * (see below). This function will be called for every user visible on your side
	 * of the burst, allowing you to for example set modes, etc. Do not use this call to
	 * synchronize data which you have stored using class Extensible -- There is a specialist
	 * function OnSyncUserMetaData and OnSyncChannelMetaData for this!
	 * @param user The user being syncronized
	 * @param proto A pointer to the module handling network protocol
	 * @param opaque An opaque pointer set by the protocol module, should not be modified!
	 */
	virtual void OnSyncUser(userrec* user, Module* proto, void* opaque);

	/** Allows modules to synchronize data which relates to channels during a netburst.
	 * When this function is called, it will be called from the module which implements
	 * the linking protocol. This currently is m_spanningtree.so. A pointer to this module
	 * is given in Module* proto, so that you may call its methods such as ProtoSendMode
	 * (see below). This function will be called for every user visible on your side
	 * of the burst, allowing you to for example set modes, etc. Do not use this call to
	 * synchronize data which you have stored using class Extensible -- There is a specialist
	 * function OnSyncUserMetaData and OnSyncChannelMetaData for this!
	 *
	 * For a good example of how to use this function, please see src/modules/m_chanprotect.cpp
	 *
	 * @param chan The channel being syncronized
	 * @param proto A pointer to the module handling network protocol
	 * @param opaque An opaque pointer set by the protocol module, should not be modified!
	 */
	virtual void OnSyncChannel(chanrec* chan, Module* proto, void* opaque);

	/* Allows modules to syncronize metadata related to channels over the network during a netburst.
	 * Whenever the linking module wants to send out data, but doesnt know what the data
	 * represents (e.g. it is Extensible metadata, added to a userrec or chanrec by a module) then
	 * this method is called.You should use the ProtoSendMetaData function after you've
	 * correctly decided how the data should be represented, to send the metadata on its way if it belongs
	 * to your module. For a good example of how to use this method, see src/modules/m_swhois.cpp.
	 * @param chan The channel whos metadata is being syncronized
	 * @param proto A pointer to the module handling network protocol
	 * @param opaque An opaque pointer set by the protocol module, should not be modified!
	 * @param extname The extensions name which is being searched for
	 */
	virtual void OnSyncChannelMetaData(chanrec* chan, Module* proto,void* opaque, const std::string &extname);

	/* Allows modules to syncronize metadata related to users over the network during a netburst.
	 * Whenever the linking module wants to send out data, but doesnt know what the data
	 * represents (e.g. it is Extensible metadata, added to a userrec or chanrec by a module) then
	 * this method is called. You should use the ProtoSendMetaData function after you've
	 * correctly decided how the data should be represented, to send the metadata on its way if
	 * if it belongs to your module.
	 * @param user The user whos metadata is being syncronized
	 * @param proto A pointer to the module handling network protocol
	 * @param opaque An opaque pointer set by the protocol module, should not be modified!
	 * @param extname The extensions name which is being searched for
	 */
	virtual void OnSyncUserMetaData(userrec* user, Module* proto,void* opaque, const std::string &extname);

	/* Allows modules to syncronize metadata not related to users or channels, over the network during a netburst.
	 * Whenever the linking module wants to send out data, but doesnt know what the data
	 * represents (e.g. it is Extensible metadata, added to a userrec or chanrec by a module) then
	 * this method is called. You should use the ProtoSendMetaData function after you've
	 * correctly decided how the data should be represented, to send the metadata on its way if
	 * if it belongs to your module.
	 * @param proto A pointer to the module handling network protocol
	 * @param opaque An opaque pointer set by the protocol module, should not be modified!
	 */
	virtual void OnSyncOtherMetaData(Module* proto, void* opaque);

	/** Allows module data, sent via ProtoSendMetaData, to be decoded again by a receiving module.
	 * Please see src/modules/m_swhois.cpp for a working example of how to use this method call.
	 * @param target_type The type of item to decode data for, TYPE_USER or TYPE_CHANNEL
	 * @param target The chanrec* or userrec* that data should be added to
	 * @param extname The extension name which is being sent
	 * @param extdata The extension data, encoded at the other end by an identical module through OnSyncChannelMetaData or OnSyncUserMetaData
	 */
	virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata);

	/** Implemented by modules which provide the ability to link servers.
	 * These modules will implement this method, which allows transparent sending of servermodes
	 * down the network link as a broadcast, without a module calling it having to know the format
	 * of the MODE command before the actual mode string.
	 *
	 * More documentation to follow soon. Please see src/modules/m_chanprotect.cpp for examples
	 * of how to use this function.
	 *
	 * @param opaque An opaque pointer set by the protocol module, should not be modified!
	 * @param target_type The type of item to decode data for, TYPE_USER or TYPE_CHANNEL
	 * @param target The chanrec* or userrec* that modes should be sent for
	 * @param modeline The modes and parameters to be sent
	 */
	virtual void ProtoSendMode(void* opaque, int target_type, void* target, const std::string &modeline);

	/** Implemented by modules which provide the ability to link servers.
	 * These modules will implement this method, which allows metadata (extra data added to
	 * user and channel records using class Extensible, Extensible::Extend, etc) to be sent
	 * to other servers on a netburst and decoded at the other end by the same module on a
	 * different server.
	 *
	 * More documentation to follow soon. Please see src/modules/m_swhois.cpp for example of
	 * how to use this function.
	 * @param opaque An opaque pointer set by the protocol module, should not be modified!
	 * @param target_type The type of item to decode data for, TYPE_USER or TYPE_CHANNEL
	 * @param target The chanrec* or userrec* that metadata should be sent for
	 * @param extname The extension name to send metadata for
	 * @param extdata Encoded data for this extension name, which will be encoded at the oppsite end by an identical module using OnDecodeMetaData
	 */
	virtual void ProtoSendMetaData(void* opaque, int target_type, void* target, const std::string &extname, const std::string &extdata);
	
	/** Called after every WALLOPS command.
	 * @param user The user sending the WALLOPS
	 * @param text The content of the WALLOPS message
	 */
	virtual void OnWallops(userrec* user, const std::string &text);

	/** Called whenever a user's hostname is changed.
	 * This event triggers after the host has been set.
	 * @param user The user whos host is being changed
	 * @param newhost The new hostname being set
	 */
	virtual void OnChangeHost(userrec* user, const std::string &newhost);

	/** Called whenever a user's GECOS (realname) is changed.
	 * This event triggers after the name has been set.
	 * @param user The user who's GECOS is being changed
	 * @param gecos The new GECOS being set on the user
	 */
	virtual void OnChangeName(userrec* user, const std::string &gecos);

	/** Called whenever a gline is added by a local user.
	 * This method is triggered after the line is added.
	 * @param duration The duration of the line in seconds
	 * @param source The sender of the line
	 * @param reason The reason text to be displayed
	 * @param hostmask The hostmask to add
	 */
	virtual void OnAddGLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask);

	/** Called whenever a zline is added by a local user.
	 * This method is triggered after the line is added.
	 * @param duration The duration of the line in seconds
	 * @param source The sender of the line
	 * @param reason The reason text to be displayed
	 * @param ipmask The hostmask to add
	 */
	virtual void OnAddZLine(long duration, userrec* source, const std::string &reason, const std::string &ipmask);

	/** Called whenever a kline is added by a local user.
	 * This method is triggered after the line is added.
	 * @param duration The duration of the line in seconds
	 * @param source The sender of the line
	 * @param reason The reason text to be displayed
	 * @param hostmask The hostmask to add
	 */
	virtual void OnAddKLine(long duration, userrec* source, const std::string &reason, const std::string &hostmask);

	/** Called whenever a qline is added by a local user.
	 * This method is triggered after the line is added.
	 * @param duration The duration of the line in seconds
	 * @param source The sender of the line
	 * @param reason The reason text to be displayed
	 * @param nickmask The hostmask to add
	 */
	virtual void OnAddQLine(long duration, userrec* source, const std::string &reason, const std::string &nickmask);

	/** Called whenever a eline is added by a local user.
	 * This method is triggered after the line is added.
	 * @param duration The duration of the line in seconds
	 * @param source The sender of the line
	 * @param reason The reason text to be displayed
	 * @param hostmask The hostmask to add
	 */
	virtual void OnAddELine(long duration, userrec* source, const std::string &reason, const std::string &hostmask);

	/** Called whenever a gline is deleted.
	 * This method is triggered after the line is deleted.
	 * @param source The user removing the line
	 * @param hostmask The hostmask to delete
	 */
	virtual void OnDelGLine(userrec* source, const std::string &hostmask);

	/** Called whenever a zline is deleted.
	 * This method is triggered after the line is deleted.
	 * @param source The user removing the line
	 * @param hostmask The hostmask to delete
	 */
	virtual void OnDelZLine(userrec* source, const std::string &ipmask);

	/** Called whenever a kline is deleted.
	 * This method is triggered after the line is deleted.
	 * @param source The user removing the line
	 * @param hostmask The hostmask to delete
	 */
	virtual void OnDelKLine(userrec* source, const std::string &hostmask);
	
	/** Called whenever a qline is deleted.
	 * This method is triggered after the line is deleted.
	 * @param source The user removing the line
	 * @param hostmask The hostmask to delete
	 */
	virtual void OnDelQLine(userrec* source, const std::string &nickmask);

	/** Called whenever a eline is deleted.
	 * This method is triggered after the line is deleted.
	 * @param source The user removing the line
	 * @param hostmask The hostmask to delete
	 */
	virtual void OnDelELine(userrec* source, const std::string &hostmask);

	/** Called before your module is unloaded to clean up Extensibles.
	 * This method is called once for every user and channel on the network,
	 * so that when your module unloads it may clear up any remaining data
	 * in the form of Extensibles added using Extensible::Extend().
	 * If the target_type variable is TYPE_USER, then void* item refers to
	 * a userrec*, otherwise it refers to a chanrec*.
	 * @param target_type The type of item being cleaned
	 * @param item A pointer to the item's class
	 */
	virtual void OnCleanup(int target_type, void* item);

	/** Called after any nickchange, local or remote. This can be used to track users after nickchanges
	 * have been applied. Please note that although you can see remote nickchanges through this function, you should
	 * NOT make any changes to the userrec if the user is a remote user as this may cause a desnyc.
	 * check user->server before taking any action (including returning nonzero from the method).
	 * Because this method is called after the nickchange is taken place, no return values are possible
	 * to indicate forbidding of the nick change. Use OnUserPreNick for this.
	 * @param user The user changing their nick
	 * @param oldnick The old nickname of the user before the nickchange
	 */
	virtual void OnUserPostNick(userrec* user, const std::string &oldnick);

	/** Called before an action which requires a channel privilage check.
	 * This function is called before many functions which check a users status on a channel, for example
	 * before opping a user, deopping a user, kicking a user, etc.
	 * There are several values for access_type which indicate for what reason access is being checked.
	 * These are:<br><br>
	 * AC_KICK (0) - A user is being kicked<br>
	 * AC_DEOP (1) - a user is being deopped<br>
	 * AC_OP (2) - a user is being opped<br>
	 * AC_VOICE (3) - a user is being voiced<br>
	 * AC_DEVOICE (4) - a user is being devoiced<br>
	 * AC_HALFOP (5) - a user is being halfopped<br>
	 * AC_DEHALFOP (6) - a user is being dehalfopped<br>
	 * AC_INVITE () - a user is being invited<br>
	 * AC_GENERAL_MODE (8) - a user channel mode is being changed<br><br>
	 * Upon returning from your function you must return either ACR_DEFAULT, to indicate the module wishes
	 * to do nothing, or ACR_DENY where approprate to deny the action, and ACR_ALLOW where appropriate to allow
	 * the action. Please note that in the case of some access checks (such as AC_GENERAL_MODE) access may be
	 * denied 'upstream' causing other checks such as AC_DEOP to not be reached. Be very careful with use of the
	 * AC_GENERAL_MODE type, as it may inadvertently override the behaviour of other modules. When the access_type
	 * is AC_GENERAL_MODE, the destination of the mode will be NULL (as it has not yet been determined).
	 * @param source The source of the access check
	 * @param dest The destination of the access check
	 * @param channel The channel which is being checked
	 * @param access_type See above
	 */
	virtual int OnAccessCheck(userrec* source,userrec* dest,chanrec* channel,int access_type);

	/** Called when a 005 numeric is about to be output.
	 * The module should modify the 005 numeric if needed to indicate its features.
	 * @param output The 005 string to be modified if neccessary.
	 */
	virtual void On005Numeric(std::string &output);

	/** Called when a client is disconnected by KILL.
	 * If a client is killed by a server, e.g. a nickname collision or protocol error,
	 * source is NULL.
	 * Return 1 from this function to prevent the kill, and 0 from this function to allow
	 * it as normal. If you prevent the kill no output will be sent to the client, it is
	 * down to your module to generate this information.
	 * NOTE: It is NOT advisable to stop kills which originate from servers or remote users.
	 * If you do so youre risking race conditions, desyncs and worse!
	 * @param source The user sending the KILL
	 * @param dest The user being killed
	 * @param reason The kill reason
	 * @return 1 to prevent the kill, 0 to allow
	 */
	virtual int OnKill(userrec* source, userrec* dest, const std::string &reason);

	/** Called when an oper wants to disconnect a remote user via KILL
	 * @param source The user sending the KILL
	 * @param dest The user being killed
	 * @param reason The kill reason
	 */
	virtual void OnRemoteKill(userrec* source, userrec* dest, const std::string &reason);

	/** Called whenever a module is loaded.
	 * mod will contain a pointer to the module, and string will contain its name,
	 * for example m_widgets.so. This function is primary for dependency checking,
	 * your module may decide to enable some extra features if it sees that you have
	 * for example loaded "m_killwidgets.so" with "m_makewidgets.so". It is highly
	 * recommended that modules do *NOT* bail if they cannot satisfy dependencies,
	 * but instead operate under reduced functionality, unless the dependency is
	 * absolutely neccessary (e.g. a module that extends the features of another
	 * module).
	 * @param mod A pointer to the new module
	 * @param name The new module's filename
	 */
	virtual void OnLoadModule(Module* mod,const std::string &name);

	/** Called whenever a module is unloaded.
	 * mod will contain a pointer to the module, and string will contain its name,
	 * for example m_widgets.so. This function is primary for dependency checking,
	 * your module may decide to enable some extra features if it sees that you have
	 * for example loaded "m_killwidgets.so" with "m_makewidgets.so". It is highly
	 * recommended that modules do *NOT* bail if they cannot satisfy dependencies,
	 * but instead operate under reduced functionality, unless the dependency is
	 * absolutely neccessary (e.g. a module that extends the features of another
	 * module).
	 * @param mod Pointer to the module being unloaded (still valid)
	 * @param name The filename of the module being unloaded
	 */
	virtual void OnUnloadModule(Module* mod,const std::string &name);

	/** Called once every five seconds for background processing.
	 * This timer can be used to control timed features. Its period is not accurate
	 * enough to be used as a clock, but it is gauranteed to be called at least once in
	 * any five second period, directly from the main loop of the server.
	 * @param curtime The current timer derived from time(2)
	 */
	virtual void OnBackgroundTimer(time_t curtime);

	/** Called whenever any command is about to be executed.
	 * This event occurs for all registered commands, wether they are registered in the core,
	 * or another module, and for invalid commands. Invalid commands may only be sent to this
	 * function when the value of validated is false. By returning 1 from this method you may prevent the
	 * command being executed. If you do this, no output is created by the core, and it is
	 * down to your module to produce any output neccessary.
	 * Note that unless you return 1, you should not destroy any structures (e.g. by using
	 * InspIRCd::QuitUser) otherwise when the command's handler function executes after your
	 * method returns, it will be passed an invalid pointer to the user object and crash!)
	 * @param command The command being executed
	 * @param parameters An array of array of characters containing the parameters for the command
	 * @param pcnt The nuimber of parameters passed to the command
	 * @param user the user issuing the command
	 * @param validated True if the command has passed all checks, e.g. it is recognised, has enough parameters, the user has permission to execute it, etc.
	 * @param original_line The entire original line as passed to the parser from the user
	 * @return 1 to block the command, 0 to allow
	 */
	virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line);

	/** Called after any command has been executed.
	 * This event occurs for all registered commands, wether they are registered in the core,
	 * or another module, but it will not occur for invalid commands (e.g. ones which do not
	 * exist within the command table). The result code returned by the command handler is
	 * provided.
	 * @param command The command being executed
	 * @param parameters An array of array of characters containing the parameters for the command
	 * @param pcnt The nuimber of parameters passed to the command
	 * @param user the user issuing the command
	 * @param result The return code given by the command handler, one of CMD_SUCCESS or CMD_FAILURE
	 * @param original_line The entire original line as passed to the parser from the user
	 */
	virtual void OnPostCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, CmdResult result, const std::string &original_line);

	/** Called to check if a user who is connecting can now be allowed to register
	 * If any modules return false for this function, the user is held in the waiting
	 * state until all modules return true. For example a module which implements ident
	 * lookups will continue to return false for a user until their ident lookup is completed.
	 * Note that the registration timeout for a user overrides these checks, if the registration
	 * timeout is reached, the user is disconnected even if modules report that the user is
	 * not ready to connect.
	 * @param user The user to check
	 * @return true to indicate readiness, false if otherwise
	 */
	virtual bool OnCheckReady(userrec* user);

	/** Called whenever a user is about to register their connection (e.g. before the user
	 * is sent the MOTD etc). Modules can use this method if they are performing a function
	 * which must be done before the actual connection is completed (e.g. ident lookups,
	 * dnsbl lookups, etc).
	 * Note that you should NOT delete the user record here by causing a disconnection!
	 * Use OnUserConnect for that instead.
	 * @param user The user registering
	 * @return 1 to indicate user quit, 0 to continue
	 */
	virtual int OnUserRegister(userrec* user);

	/** Called whenever a user joins a channel, to determine if invite checks should go ahead or not.
	 * This method will always be called for each join, wether or not the channel is actually +i, and
	 * determines the outcome of an if statement around the whole section of invite checking code.
	 * return 1 to explicitly allow the join to go ahead or 0 to ignore the event.
	 * @param user The user joining the channel
	 * @param chan The channel being joined
	 * @return 1 to explicitly allow the join, 0 to proceed as normal
	 */
	virtual int OnCheckInvite(userrec* user, chanrec* chan);

	/** Called whenever a user joins a channel, to determine if key checks should go ahead or not.
	 * This method will always be called for each join, wether or not the channel is actually +k, and
	 * determines the outcome of an if statement around the whole section of key checking code.
	 * if the user specified no key, the keygiven string will be a valid but empty value.
	 * return 1 to explicitly allow the join to go ahead or 0 to ignore the event.
	 * @param user The user joining the channel
	 * @param chan The channel being joined
	 * @return 1 to explicitly allow the join, 0 to proceed as normal
	 */
	virtual int OnCheckKey(userrec* user, chanrec* chan, const std::string &keygiven);

	/** Called whenever a user joins a channel, to determine if channel limit checks should go ahead or not.
	 * This method will always be called for each join, wether or not the channel is actually +l, and
	 * determines the outcome of an if statement around the whole section of channel limit checking code.
	 * return 1 to explicitly allow the join to go ahead or 0 to ignore the event.
	 * @param user The user joining the channel
	 * @param chan The channel being joined
	 * @return 1 to explicitly allow the join, 0 to proceed as normal
	 */
	virtual int OnCheckLimit(userrec* user, chanrec* chan);

	/** Called whenever a user joins a channel, to determine if banlist checks should go ahead or not.
	 * This method will always be called for each join, wether or not the user actually matches a channel ban, and
	 * determines the outcome of an if statement around the whole section of ban checking code.
	 * return 1 to explicitly allow the join to go ahead or 0 to ignore the event.
	 * @param user The user joining the channel
	 * @param chan The channel being joined
	 * @return 1 to explicitly allow the join, 0 to proceed as normal
	 */
	virtual int OnCheckBan(userrec* user, chanrec* chan);

	/** Called on all /STATS commands
	 * This method is triggered for all /STATS use, including stats symbols handled by the core.
	 * @param symbol the symbol provided to /STATS
	 * @param user the user issuing the /STATS command
	 * @param results A string_list to append results into. You should put all your results
	 * into this string_list, rather than displaying them directly, so that your handler will
	 * work when remote STATS queries are received.
	 * @return 1 to block the /STATS from being processed by the core, 0 to allow it
	 */
	virtual int OnStats(char symbol, userrec* user, string_list &results);

	/** Called whenever a change of a local users displayed host is attempted.
	 * Return 1 to deny the host change, or 0 to allow it.
	 * @param user The user whos host will be changed
	 * @param newhost The new hostname
	 * @return 1 to deny the host change, 0 to allow
	 */
	virtual int OnChangeLocalUserHost(userrec* user, const std::string &newhost);

	/** Called whenever a change of a local users GECOS (fullname field) is attempted.
	 * return 1 to deny the name change, or 0 to allow it.
	 * @param user The user whos GECOS will be changed
	 * @param newhost The new GECOS
	 * @return 1 to deny the GECOS change, 0 to allow
	 */
	virtual int OnChangeLocalUserGECOS(userrec* user, const std::string &newhost); 

	/** Called whenever a topic is changed by a local user.
	 * Return 1 to deny the topic change, or 0 to allow it.
	 * @param user The user changing the topic
	 * @param chan The channels who's topic is being changed
	 * @param topic The actual topic text
	 * @param 1 to block the topic change, 0 to allow
	 */
	virtual int OnLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic);

	/** Called whenever a local topic has been changed.
	 * To block topic changes you must use OnLocalTopicChange instead.
	 * @param user The user changing the topic
	 * @param chan The channels who's topic is being changed
	 * @param topic The actual topic text
	 */
	virtual void OnPostLocalTopicChange(userrec* user, chanrec* chan, const std::string &topic);

	/** Called whenever an Event class is sent to all module by another module.
	 * Please see the documentation of Event::Send() for further information. The Event sent can
	 * always be assumed to be non-NULL, you should *always* check the value of Event::GetEventID()
	 * before doing anything to the event data, and you should *not* change the event data in any way!
	 * @param event The Event class being received
	 */
	virtual void OnEvent(Event* event);

	/** Called whenever a Request class is sent to your module by another module.
	 * Please see the documentation of Request::Send() for further information. The Request sent
	 * can always be assumed to be non-NULL, you should not change the request object or its data.
	 * Your method may return arbitary data in the char* result which the requesting module
	 * may be able to use for pre-determined purposes (e.g. the results of an SQL query, etc).
	 * @param request The Request class being received
	 */
	virtual char* OnRequest(Request* request);

	/** Called whenever an oper password is to be compared to what a user has input.
	 * The password field (from the config file) is in 'password' and is to be compared against
	 * 'input'. This method allows for encryption of oper passwords and much more besides.
	 * You should return a nonzero value if you want to allow the comparison or zero if you wish
	 * to do nothing.
	 * @param password The oper's password
	 * @param input The password entered
	 * @param tagnumber The tag number (from the configuration file) of this oper's tag
	 * @return 1 to match the passwords, 0 to do nothing. -1 to not match, and not continue.
	 */
	virtual int OnOperCompare(const std::string &password, const std::string &input, int tagnumber);

	/** Called whenever a user is given usermode +o, anywhere on the network.
	 * You cannot override this and prevent it from happening as it is already happened and
	 * such a task must be performed by another server. You can however bounce modes by sending
	 * servermodes out to reverse mode changes.
	 * @param user The user who is opering
	 */
	virtual void OnGlobalOper(userrec* user);

	/** Called after a user has fully connected and all modules have executed OnUserConnect
	 * This event is informational only. You should not change any user information in this
	 * event. To do so, use the OnUserConnect method to change the state of local users.
	 * This is called for both local and remote users.
	 * @param user The user who is connecting
	 */
	virtual void OnPostConnect(userrec* user);

	/** Called whenever a ban is added to a channel's list.
	 * Return a non-zero value to 'eat' the mode change and prevent the ban from being added.
	 * @param source The user adding the ban
	 * @param channel The channel the ban is being added to
	 * @param banmask The ban mask being added
	 * @return 1 to block the ban, 0 to continue as normal
	 */
	virtual int OnAddBan(userrec* source, chanrec* channel,const std::string &banmask);

	/** Called whenever a ban is removed from a channel's list.
	 * Return a non-zero value to 'eat' the mode change and prevent the ban from being removed.
	 * @param source The user deleting the ban
	 * @param channel The channel the ban is being deleted from
	 * @param banmask The ban mask being deleted
	 * @return 1 to block the unban, 0 to continue as normal
	 */
	virtual int OnDelBan(userrec* source, chanrec* channel,const std::string &banmask);

	/** Called immediately after any  connection is accepted. This is intended for raw socket
	 * processing (e.g. modules which wrap the tcp connection within another library) and provides
	 * no information relating to a user record as the connection has not been assigned yet.
	 * There are no return values from this call as all modules get an opportunity if required to
	 * process the connection.
	 * @param fd The file descriptor returned from accept()
	 * @param ip The IP address of the connecting user
	 * @param localport The local port number the user connected to
	 */
	virtual void OnRawSocketAccept(int fd, const std::string &ip, int localport);

	/** Called immediately before any write() operation on a user's socket in the core. Because
	 * this event is a low level event no user information is associated with it. It is intended
	 * for use by modules which may wrap connections within another API such as SSL for example.
	 * return a non-zero result if you have handled the write operation, in which case the core
	 * will not call write().
	 * @param fd The file descriptor of the socket
	 * @param buffer A char* buffer being written
	 * @param Number of characters to write
	 * @return Number of characters actually written or 0 if you didn't handle the operation
	 */
	virtual int OnRawSocketWrite(int fd, const char* buffer, int count);

	/** Called immediately before any socket is closed. When this event is called, shutdown()
	 * has not yet been called on the socket.
	 * @param fd The file descriptor of the socket prior to close()
	 */
	virtual void OnRawSocketClose(int fd);

	virtual void OnRawSocketConnect(int fd);

	/** Called immediately before any read() operation on a client socket in the core.
	 * This occurs AFTER the select() or poll() so there is always data waiting to be read
	 * when this event occurs.
	 * Your event should return 1 if it has handled the reading itself, which prevents the core
	 * just using read(). You should place any data read into buffer, up to but NOT GREATER THAN
	 * the value of count. The value of readresult must be identical to an actual result that might
	 * be returned from the read() system call, for example, number of bytes read upon success,
	 * 0 upon EOF or closed socket, and -1 for error. If your function returns a nonzero value,
	 * you MUST set readresult.
	 * @param fd The file descriptor of the socket
	 * @param buffer A char* buffer being read to
	 * @param count The size of the buffer
	 * @param readresult The amount of characters read, or 0
	 * @return nonzero if the event was handled, in which case readresult must be valid on exit
	 */
	virtual int OnRawSocketRead(int fd, char* buffer, unsigned int count, int &readresult);

	/** Called whenever a user sets away.
	 * This method has no parameter for the away message, as it is available in the
	 * user record as userrec::awaymsg.
	 */
	virtual void OnSetAway(userrec* user);

	/** Called when a user cancels their away state.
	 */
	virtual void OnCancelAway(userrec* user);

	/** Called whenever a NAMES list is requested.
	 * You can produce the nameslist yourself, overriding the current list,
	 * and if you do you must return 1. If you do not handle the names list,
	 * return 0.
	 */
	virtual int OnUserList(userrec* user, chanrec* Ptr);

	/** Called whenever a line of WHOIS output is sent to a user.
	 * You may change the numeric and the text of the output by changing
	 * the values numeric and text, but you cannot change the user the
	 * numeric is sent to. You may however change the user's userrec values.
	 * @param user The user the numeric is being sent to
	 * @param dest The user being WHOISed
	 * @param numeric The numeric of the line being sent
	 * @param text The text of the numeric, including any parameters
	 * @return nonzero to drop the line completely so that the user does not
	 * receive it, or zero to allow the line to be sent.
	 */
	virtual int OnWhoisLine(userrec* user, userrec* dest, int &numeric, std::string &text);

	/** Called at intervals for modules to garbage-collect any hashes etc.
	 * Certain data types such as hash_map 'leak' buckets, which must be
	 * tidied up and freed by copying into a new item every so often. This
	 * method is called when it is time to do that.
	 */
	virtual void OnGarbageCollect();
};


#define CONF_NOT_A_NUMBER	0x000010
#define CONF_NOT_UNSIGNED	0x000080
#define CONF_VALUE_NOT_FOUND	0x000100
#define CONF_FILE_NOT_FOUND	0x000200


/** Allows reading of values from configuration files
 * This class allows a module to read from either the main configuration file (inspircd.conf) or from
 * a module-specified configuration file. It may either be instantiated with one parameter or none.
 * Constructing the class using one parameter allows you to specify a path to your own configuration
 * file, otherwise, inspircd.conf is read.
 */
class ConfigReader : public classbase
{
  protected:
	InspIRCd* ServerInstance;
	/** The contents of the configuration file
	 * This protected member should never be accessed by a module (and cannot be accessed unless the
	 * core is changed). It will contain a pointer to the configuration file data with unneeded data
	 * (such as comments) stripped from it.
	 */
	ConfigDataHash* data;
	std::ostringstream* errorlog;;
	/** Used to store errors
	 */
	bool privatehash; // If we're using our own config data hash or not.
	bool readerror;
	long error;
	
  public:
	/** Default constructor.
	 * This constructor initialises the ConfigReader class to read the inspircd.conf file
	 * as specified when running ./configure.
	 */
	ConfigReader(InspIRCd* Instance);
	/** Overloaded constructor.
	 * This constructor initialises the ConfigReader class to read a user-specified config file
	 */
	ConfigReader(InspIRCd* Instance, const std::string &filename);
	/** Default destructor.
	 * This method destroys the ConfigReader class.
	 */
	~ConfigReader();

	/** Retrieves a value from the config file.
	 * This method retrieves a value from the config file. Where multiple copies of the tag
	 * exist in the config file, index indicates which of the values to retrieve.
	 */
	std::string ReadValue(const std::string &tag, const std::string &name, int index, bool allow_linefeeds = false);
	/** Retrieves a value from the config file.
	 * This method retrieves a value from the config file. Where multiple copies of the tag
	 * exist in the config file, index indicates which of the values to retrieve. If the
	 * tag is not found the default value is returned instead.
	 */
	std::string ReadValue(const std::string &tag, const std::string &name, const std::string &default_value, int index, bool allow_linefeeds = false);

	/** Retrieves a boolean value from the config file.
	 * This method retrieves a boolean value from the config file. Where multiple copies of the tag
	 * exist in the config file, index indicates which of the values to retrieve. The values "1", "yes"
	 * and "true" in the config file count as true to ReadFlag, and any other value counts as false.
	 */
	bool ReadFlag(const std::string &tag, const std::string &name, int index);
	/** Retrieves a boolean value from the config file.
	 * This method retrieves a boolean value from the config file. Where multiple copies of the tag
	 * exist in the config file, index indicates which of the values to retrieve. The values "1", "yes"
	 * and "true" in the config file count as true to ReadFlag, and any other value counts as false.
	 * If the tag is not found, the default value is used instead.
	 */
	bool ReadFlag(const std::string &tag, const std::string &name, const std::string &default_value, int index);

	/** Retrieves an integer value from the config file.
	 * This method retrieves an integer value from the config file. Where multiple copies of the tag
	 * exist in the config file, index indicates which of the values to retrieve. Any invalid integer
	 * values in the tag will cause the objects error value to be set, and any call to GetError() will
	 * return CONF_INVALID_NUMBER to be returned. needs_unsigned is set if the number must be unsigned.
	 * If a signed number is placed into a tag which is specified unsigned, 0 will be returned and GetError()
	 * will return CONF_NOT_UNSIGNED
	 */
	long ReadInteger(const std::string &tag, const std::string &name, int index, bool needs_unsigned);
	/** Retrieves an integer value from the config file.
	 * This method retrieves an integer value from the config file. Where multiple copies of the tag
	 * exist in the config file, index indicates which of the values to retrieve. Any invalid integer
	 * values in the tag will cause the objects error value to be set, and any call to GetError() will
	 * return CONF_INVALID_NUMBER to be returned. needs_unsigned is set if the number must be unsigned.
	 * If a signed number is placed into a tag which is specified unsigned, 0 will be returned and GetError()
	 * will return CONF_NOT_UNSIGNED. If the tag is not found, the default value is used instead.
	 */
	long ReadInteger(const std::string &tag, const std::string &name, const std::string &default_value, int index, bool needs_unsigned);

	/** Returns the last error to occur.
	 * Valid errors can be found by looking in modules.h. Any nonzero value indicates an error condition.
	 * A call to GetError() resets the error flag back to 0.
	 */
	long GetError();
	/** Counts the number of times a given tag appears in the config file.
	 * This method counts the number of times a tag appears in a config file, for use where
	 * there are several tags of the same kind, e.g. with opers and connect types. It can be
	 * used with the index value of ConfigReader::ReadValue to loop through all copies of a
	 * multiple instance tag.
	 */
	int Enumerate(const std::string &tag);
	/** Returns true if a config file is valid.
	 * This method is partially implemented and will only return false if the config
	 * file does not exist or could not be opened.
	 */
	bool Verify();
	/** Dumps the list of errors in a config file to an output location. If bail is true,
	 * then the program will abort. If bail is false and user points to a valid user
	 * record, the error report will be spooled to the given user by means of NOTICE.
	 * if bool is false AND user is false, the error report will be spooled to all opers
	 * by means of a NOTICE to all opers.
	 */
	void DumpErrors(bool bail,userrec* user);

	/** Returns the number of items within a tag.
	 * For example if the tag was &lt;test tag="blah" data="foo"&gt; then this
	 * function would return 2. Spaces and newlines both qualify as valid seperators
	 * between values.
	 */
	int EnumerateValues(const std::string &tag, int index);
};



/** Caches a text file into memory and can be used to retrieve lines from it.
 * This class contains methods for read-only manipulation of a text file in memory.
 * Either use the constructor type with one parameter to load a file into memory
 * at construction, or use the LoadFile method to load a file.
 */
class FileReader : public classbase
{
	InspIRCd* ServerInstance;
	/** The file contents
	 */
	file_cache fc;

	unsigned long contentsize;

	void CalcSize();

 public:
	/** Default constructor.
	 * This method does not load any file into memory, you must use the LoadFile method
	 * after constructing the class this way.
	 */
	FileReader(InspIRCd* Instance);

	/** Secondary constructor.
	 * This method initialises the class with a file loaded into it ready for GetLine and
	 * and other methods to be called. If the file could not be loaded, FileReader::FileSize
	 * returns 0.
	 */
	FileReader(InspIRCd* Instance, const std::string &filename);

	/** Default destructor.
	 * This deletes the memory allocated to the file.
	 */
	~FileReader();

	/** Used to load a file.
	 * This method loads a file into the class ready for GetLine and
	 * and other methods to be called. If the file could not be loaded, FileReader::FileSize
	 * returns 0.
	 */
	void LoadFile(const std::string &filename);

	/** Returns the whole content of the file as std::string
	 */
	std::string Contents();

	/** Returns the entire size of the file as std::string
	 */
	unsigned long ContentSize();

	/** Returns true if the file exists
	 * This function will return false if the file could not be opened.
	 */
	bool Exists();
 
	/** Retrieve one line from the file.
	 * This method retrieves one line from the text file. If an empty non-NULL string is returned,
	 * the index was out of bounds, or the line had no data on it.
	 */
	std::string GetLine(int x);

	/** Returns the size of the file in lines.
	 * This method returns the number of lines in the read file. If it is 0, no lines have been
	 * read into memory, either because the file is empty or it does not exist, or cannot be
	 * opened due to permission problems.
	 */
	int FileSize();
};


/** Instantiates classes inherited from Module.
 * This class creates a class inherited from type Module, using new. This is to allow for modules
 * to create many different variants of Module, dependent on architecture, configuration, etc.
 * In most cases, the simple class shown in the example module m_foobar.so will suffice for most
 * modules.
 */
class ModuleFactory : public classbase
{
 public:
	/** The default constructor does nothing.
	 */
	ModuleFactory() { }
	/** The default destructor does nothing
	 */
	virtual ~ModuleFactory() { }
	/** Creates a new module.
	 * Your inherited class of ModuleFactory must return a pointer to your Module class
	 * using this method.
	 */
	virtual Module * CreateModule(InspIRCd* Me) = 0;
};

/** A DLLFactory (designed to load shared objects) containing a ModuleFactory.
 */
typedef DLLFactory<ModuleFactory> ircd_module;

/** A list of loaded Modules
 */
typedef std::vector<Module*> ModuleList;

/** A list of loaded ModuleFactories
 */
typedef std::vector<ircd_module*> FactoryList;

#endif