summaryrefslogtreecommitdiff
path: root/lib/rbot/ircbot.rb
blob: ed435fb407c700ea61a817e37362cb0349a71c19 (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
require 'thread'

require 'etc'
require 'fileutils'
require 'logger'

$debug = false unless $debug
$daemonize = false unless $daemonize

$dateformat = "%Y/%m/%d %H:%M:%S"
$logger = Logger.new($stderr)
$logger.datetime_format = $dateformat
$logger.level = $cl_loglevel if $cl_loglevel
$logger.level = 0 if $debug

def rawlog(level, message=nil, who_pos=1)
  call_stack = caller
  if call_stack.length > who_pos
    who = call_stack[who_pos].sub(%r{(?:.+)/([^/]+):(\d+)(:in .*)?}) { "#{$1}:#{$2}#{$3}" }
  else
    who = "(unknown)"
  end
  # Output each line. To distinguish between separate messages and multi-line
  # messages originating at the same time, we blank #{who} after the first message
  # is output.
  message.to_s.each_line { |l|
    $logger.add(level, l.chomp, who)
    who.gsub!(/./," ")
  }
end

def log_session_start
  $logger << "\n\n=== #{botclass} session started on #{Time.now.strftime($dateformat)} ===\n\n"
end

def log_session_end
  $logger << "\n\n=== #{botclass} session ended on #{Time.now.strftime($dateformat)} ===\n\n"
end

def debug(message=nil, who_pos=1)
  rawlog(Logger::Severity::DEBUG, message, who_pos)
end

def log(message=nil, who_pos=1)
  rawlog(Logger::Severity::INFO, message, who_pos)
end

def warning(message=nil, who_pos=1)
  rawlog(Logger::Severity::WARN, message, who_pos)
end

def error(message=nil, who_pos=1)
  rawlog(Logger::Severity::ERROR, message, who_pos)
end

def fatal(message=nil, who_pos=1)
  rawlog(Logger::Severity::FATAL, message, who_pos)
end

debug "debug test"
log "log test"
warning "warning test"
error "error test"
fatal "fatal test"

# The following global is used for the improved signal handling.
$interrupted = 0

# these first
require 'rbot/rbotconfig'
require 'rbot/config'
# require 'rbot/utils'

require 'rbot/irc'
require 'rbot/rfc2812'
require 'rbot/ircsocket'
require 'rbot/botuser'
require 'rbot/timer'
require 'rbot/plugins'
# require 'rbot/channel'
require 'rbot/message'
require 'rbot/language'
require 'rbot/dbhash'
require 'rbot/registry'
# require 'rbot/httputil'

module Irc

# Main bot class, which manages the various components, receives messages,
# handles them or passes them to plugins, and contains core functionality.
class IrcBot
  # the bot's IrcAuth data
  attr_reader :auth

  # the bot's BotConfig data
  attr_reader :config

  # the botclass for this bot (determines configdir among other things)
  attr_reader :botclass

  # used to perform actions periodically (saves configuration once per minute
  # by default)
  attr_reader :timer

  # synchronize with this mutex while touching permanent data files:
  # saving, flushing, cleaning up ...
  attr_reader :save_mutex

  # bot's Language data
  attr_reader :lang

  # bot's irc socket
  # TODO multiserver
  attr_reader :socket

  # bot's object registry, plugins get an interface to this for persistant
  # storage (hash interface tied to a bdb file, plugins use Accessors to store
  # and restore objects in their own namespaces.)
  attr_reader :registry

  # bot's plugins. This is an instance of class Plugins
  attr_reader :plugins

  # bot's httputil help object, for fetching resources via http. Sets up
  # proxies etc as defined by the bot configuration/environment
  attr_reader :httputil

  # server we are connected to
  # TODO multiserver
  def server
    @client.server
  end

  # bot User in the client/server connection
  # TODO multiserver
  def myself
    @client.client
  end

  # bot User in the client/server connection
  def nick
    myself.nick
  end

  # create a new IrcBot with botclass +botclass+
  def initialize(botclass, params = {})
    # BotConfig for the core bot
    # TODO should we split socket stuff into ircsocket, etc?
    BotConfig.register BotConfigStringValue.new('server.name',
      :default => "localhost", :requires_restart => true,
      :desc => "What server should the bot connect to?",
      :wizard => true)
    BotConfig.register BotConfigIntegerValue.new('server.port',
      :default => 6667, :type => :integer, :requires_restart => true,
      :desc => "What port should the bot connect to?",
      :validate => Proc.new {|v| v > 0}, :wizard => true)
    BotConfig.register BotConfigBooleanValue.new('server.ssl',
      :default => false, :requires_restart => true, :wizard => true,
      :desc => "Use SSL to connect to this server?")
    BotConfig.register BotConfigStringValue.new('server.password',
      :default => false, :requires_restart => true,
      :desc => "Password for connecting to this server (if required)",
      :wizard => true)
    BotConfig.register BotConfigStringValue.new('server.bindhost',
      :default => false, :requires_restart => true,
      :desc => "Specific local host or IP for the bot to bind to (if required)",
      :wizard => true)
    BotConfig.register BotConfigIntegerValue.new('server.reconnect_wait',
      :default => 5, :validate => Proc.new{|v| v >= 0},
      :desc => "Seconds to wait before attempting to reconnect, on disconnect")
    BotConfig.register BotConfigFloatValue.new('server.sendq_delay',
      :default => 2.0, :validate => Proc.new{|v| v >= 0},
      :desc => "(flood prevention) the delay between sending messages to the server (in seconds)",
      :on_change => Proc.new {|bot, v| bot.socket.sendq_delay = v })
    BotConfig.register BotConfigIntegerValue.new('server.sendq_burst',
      :default => 4, :validate => Proc.new{|v| v >= 0},
      :desc => "(flood prevention) max lines to burst to the server before throttling. Most ircd's allow bursts of up 5 lines",
      :on_change => Proc.new {|bot, v| bot.socket.sendq_burst = v })
    BotConfig.register BotConfigIntegerValue.new('server.ping_timeout',
      :default => 30, :validate => Proc.new{|v| v >= 0},
      :desc => "reconnect if server doesn't respond to PING within this many seconds (set to 0 to disable)")

    BotConfig.register BotConfigStringValue.new('irc.nick', :default => "rbot",
      :desc => "IRC nickname the bot should attempt to use", :wizard => true,
      :on_change => Proc.new{|bot, v| bot.sendq "NICK #{v}" })
    BotConfig.register BotConfigStringValue.new('irc.user', :default => "rbot",
      :requires_restart => true,
      :desc => "local user the bot should appear to be", :wizard => true)
    BotConfig.register BotConfigArrayValue.new('irc.join_channels',
      :default => [], :wizard => true,
      :desc => "What channels the bot should always join at startup. List multiple channels using commas to separate. If a channel requires a password, use a space after the channel name. e.g: '#chan1, #chan2, #secretchan secritpass, #chan3'")
    BotConfig.register BotConfigArrayValue.new('irc.ignore_users',
      :default => [], 
      :desc => "Which users to ignore input from. This is mainly to avoid bot-wars triggered by creative people")

    BotConfig.register BotConfigIntegerValue.new('core.save_every',
      :default => 60, :validate => Proc.new{|v| v >= 0},
      :on_change => Proc.new { |bot, v|
        if @save_timer
          if v > 0
            @timer.reschedule(@save_timer, v)
            @timer.unblock(@save_timer)
          else
            @timer.block(@save_timer)
          end
        else
          if v > 0
            @save_timer = @timer.add(v) { bot.save }
          end
          # Nothing to do when v == 0
        end
      },
      :desc => "How often the bot should persist all configuration to disk (in case of a server crash, for example)")

    BotConfig.register BotConfigBooleanValue.new('core.run_as_daemon',
      :default => false, :requires_restart => true,
      :desc => "Should the bot run as a daemon?")

    BotConfig.register BotConfigStringValue.new('log.file',
      :default => false, :requires_restart => true,
      :desc => "Name of the logfile to which console messages will be redirected when the bot is run as a daemon")
    BotConfig.register BotConfigIntegerValue.new('log.level',
      :default => 1, :requires_restart => false,
      :validate => Proc.new { |v| (0..5).include?(v) },
      :on_change => Proc.new { |bot, v|
        $logger.level = v
      },
      :desc => "The minimum logging level (0=DEBUG,1=INFO,2=WARN,3=ERROR,4=FATAL) for console messages")
    BotConfig.register BotConfigIntegerValue.new('log.keep',
      :default => 1, :requires_restart => true,
      :validate => Proc.new { |v| v >= 0 },
      :desc => "How many old console messages logfiles to keep")
    BotConfig.register BotConfigIntegerValue.new('log.max_size',
      :default => 10, :requires_restart => true,
      :validate => Proc.new { |v| v > 0 },
      :desc => "Maximum console messages logfile size (in megabytes)")

    BotConfig.register BotConfigEnumValue.new('send.newlines',
      :values => ['split', 'join'], :default => 'split',
      :on_change => Proc.new { |bot, v|
        bot.set_default_send_options :newlines => v.to_sym
      },
      :desc => "When set to split, messages with embedded newlines will be sent as separate lines. When set to join, newlines will be replaced by the value of join_with")
    BotConfig.register BotConfigStringValue.new('send.join_with',
      :default => ' ',
      :on_change => Proc.new { |bot, v|
        bot.set_default_send_options :join_with => v.dup
      },
      :desc => "String used to replace newlines when send.newlines is set to join")
    BotConfig.register BotConfigIntegerValue.new('send.max_lines',
      :default => 0,
      :validate => Proc.new { |v| v >= 0 },
      :on_change => Proc.new { |bot, v|
        bot.set_default_send_options :max_lines => v
      },
      :desc => "Maximum number of IRC lines to send for each message (set to 0 for no limit)")
    BotConfig.register BotConfigEnumValue.new('send.overlong',
      :values => ['split', 'truncate'], :default => 'split',
      :on_change => Proc.new { |bot, v|
        bot.set_default_send_options :overlong => v.to_sym
      },
      :desc => "When set to split, messages which are too long to fit in a single IRC line are split into multiple lines. When set to truncate, long messages are truncated to fit the IRC line length")
    BotConfig.register BotConfigStringValue.new('send.split_at',
      :default => '\s+',
      :on_change => Proc.new { |bot, v|
        bot.set_default_send_options :split_at => Regexp.new(v)
      },
      :desc => "A regular expression that should match the split points for overlong messages (see send.overlong)")
    BotConfig.register BotConfigBooleanValue.new('send.purge_split',
      :default => true,
      :on_change => Proc.new { |bot, v|
        bot.set_default_send_options :purge_split => v
      },
      :desc => "Set to true if the splitting boundary (set in send.split_at) should be removed when splitting overlong messages (see send.overlong)")
    BotConfig.register BotConfigStringValue.new('send.truncate_text',
      :default => "#{Reverse}...#{Reverse}",
      :on_change => Proc.new { |bot, v|
        bot.set_default_send_options :truncate_text => v.dup
      },
      :desc => "When truncating overlong messages (see send.overlong) or when sending too many lines per message (see send.max_lines) replace the end of the last line with this text")

    @argv = params[:argv]

    unless FileTest.directory? Config::coredir
      error "core directory '#{Config::coredir}' not found, did you setup.rb?"
      exit 2
    end

    unless FileTest.directory? Config::datadir
      error "data directory '#{Config::datadir}' not found, did you setup.rb?"
      exit 2
    end

    unless botclass and not botclass.empty?
      # We want to find a sensible default.
      #  * On POSIX systems we prefer ~/.rbot for the effective uid of the process
      #  * On Windows (at least the NT versions) we want to put our stuff in the
      #    Application Data folder.
      # We don't use any particular O/S detection magic, exploiting the fact that
      # Etc.getpwuid is nil on Windows
      if Etc.getpwuid(Process::Sys.geteuid)
        botclass = Etc.getpwuid(Process::Sys.geteuid)[:dir].dup
      else
        if ENV.has_key?('APPDATA')
          botclass = ENV['APPDATA'].dup
          botclass.gsub!("\\","/")
        end
      end
      botclass += "/.rbot"
    end
    botclass = File.expand_path(botclass)
    @botclass = botclass.gsub(/\/$/, "")

    unless FileTest.directory? botclass
      log "no #{botclass} directory found, creating from templates.."
      if FileTest.exist? botclass
        error "file #{botclass} exists but isn't a directory"
        exit 2
      end
      FileUtils.cp_r Config::datadir+'/templates', botclass
    end

    Dir.mkdir("#{botclass}/logs") unless File.exist?("#{botclass}/logs")
    Dir.mkdir("#{botclass}/registry") unless File.exist?("#{botclass}/registry")
    Dir.mkdir("#{botclass}/safe_save") unless File.exist?("#{botclass}/safe_save")

    # Time at which the last PING was sent
    @last_ping = nil
    # Time at which the last line was RECV'd from the server
    @last_rec = nil

    @startup_time = Time.new

    begin
      @config = BotConfig.configmanager
      @config.bot_associate(self)
    rescue => e
      fatal e.inspect
      fatal e.backtrace.join("\n")
      log_session_end
      exit 2
    end

    if @config['core.run_as_daemon']
      $daemonize = true
    end

    @logfile = @config['log.file']
    if @logfile.class!=String || @logfile.empty?
      @logfile = "#{botclass}/#{File.basename(botclass).gsub(/^\.+/,'')}.log"
    end

    # See http://blog.humlab.umu.se/samuel/archives/000107.html
    # for the backgrounding code 
    if $daemonize
      begin
        exit if fork
        Process.setsid
        exit if fork
      rescue NotImplementedError
        warning "Could not background, fork not supported"
      rescue => e
        warning "Could not background. #{e.inspect}"
      end
      Dir.chdir botclass
      # File.umask 0000                # Ensure sensible umask. Adjust as needed.
      log "Redirecting standard input/output/error"
      begin
        STDIN.reopen "/dev/null"
      rescue Errno::ENOENT
        # On Windows, there's not such thing as /dev/null
        STDIN.reopen "NUL"
      end
      def STDOUT.write(str=nil)
        log str, 2
        return str.to_s.size
      end
      def STDERR.write(str=nil)
        if str.to_s.match(/:\d+: warning:/)
          warning str, 2
        else
          error str, 2
        end
        return str.to_s.size
      end
    end

    # Set the new logfile and loglevel. This must be done after the daemonizing
    $logger = Logger.new(@logfile, @config['log.keep'], @config['log.max_size']*1024*1024)
    $logger.datetime_format= $dateformat
    $logger.level = @config['log.level']
    $logger.level = $cl_loglevel if $cl_loglevel
    $logger.level = 0 if $debug

    log_session_start

    @registry = BotRegistry.new self

    @timer = Timer::Timer.new(1.0) # only need per-second granularity
    @save_mutex = Mutex.new
    if @config['core.save_every'] > 0
      @save_timer = @timer.add(@config['core.save_every']) { save }
    else
      @save_timer = nil
    end
    @quit_mutex = Mutex.new

    @logs = Hash.new

    @plugins = nil
    @lang = Language::Language.new(self, @config['core.language'])

    begin
      @auth = Auth::authmanager
      @auth.bot_associate(self)
      # @auth.load("#{botclass}/botusers.yaml")
    rescue => e
      fatal e.inspect
      fatal e.backtrace.join("\n")
      log_session_end
      exit 2
    end
    @auth.everyone.set_default_permission("*", true)
    @auth.botowner.password= @config['auth.password']

    Dir.mkdir("#{botclass}/plugins") unless File.exist?("#{botclass}/plugins")
    @plugins = Plugins::pluginmanager
    @plugins.bot_associate(self)
    @plugins.add_botmodule_dir(Config::coredir + "/utils")
    @plugins.add_botmodule_dir(Config::coredir)
    @plugins.add_botmodule_dir("#{botclass}/plugins")
    @plugins.add_botmodule_dir(Config::datadir + "/plugins")
    @plugins.scan

    Utils.set_safe_save_dir("#{botclass}/safe_save")
    @httputil = Utils::HttpUtil.new(self)


    @socket = IrcSocket.new(@config['server.name'], @config['server.port'], @config['server.bindhost'], @config['server.sendq_delay'], @config['server.sendq_burst'], :ssl => @config['server.ssl'])
    @client = IrcClient.new
    myself.nick = @config['irc.nick']

    # Channels where we are quiet
    # Array of channels names where the bot should be quiet
    # '*' means all channels
    #
    @quiet = []

    @client[:welcome] = proc {|data|
      irclog "joined server #{@client.server} as #{myself}", "server"

      @plugins.delegate("connect")

      @config['irc.join_channels'].each { |c|
        debug "autojoining channel #{c}"
        if(c =~ /^(\S+)\s+(\S+)$/i)
          join $1, $2
        else
          join c if(c)
        end
      }
    }

    # TODO the next two @client should go into rfc2812.rb, probably
    # Since capabs are two-steps processes, server.supports[:capab]
    # should be a three-state: nil, [], [....]
    asked_for = { :"identify-msg" => false }
    @client[:isupport] = proc { |data|
      if server.supports[:capab] and !asked_for[:"identify-msg"]
        sendq "CAPAB IDENTIFY-MSG"
        asked_for[:"identify-msg"] = true
      end
    }
    @client[:datastr] = proc { |data|
      if data[:text] == "IDENTIFY-MSG"
        server.capabilities[:"identify-msg"] = true
      else
        debug "Not handling RPL_DATASTR #{data[:servermessage]}"
      end
    }

    @client[:privmsg] = proc { |data|
      m = PrivMessage.new(self, server, data[:source], data[:target], data[:message])
      # debug "Message source is #{data[:source].inspect}"
      # debug "Message target is #{data[:target].inspect}"
      # debug "Bot is #{myself.inspect}"

      ignored = false
      @config['irc.ignore_users'].each { |mask|
        if m.source.matches?(server.new_netmask(mask))
          ignored = true
          break
        end
      }

      irclogprivmsg(m)

      unless ignored
        @plugins.delegate "listen", m
        @plugins.privmsg(m) if m.address?
      end
    }
    @client[:notice] = proc { |data|
      message = NoticeMessage.new(self, server, data[:source], data[:target], data[:message])
      # pass it off to plugins that want to hear everything
      @plugins.delegate "listen", message
    }
    @client[:motd] = proc { |data|
      data[:motd].each_line { |line|
        irclog "MOTD: #{line}", "server"
      }
    }
    @client[:nicktaken] = proc { |data|
      nickchg "#{data[:nick]}_"
      @plugins.delegate "nicktaken", data[:nick]
    }
    @client[:badnick] = proc {|data|
      warning "bad nick (#{data[:nick]})"
    }
    @client[:ping] = proc {|data|
      sendq "PONG #{data[:pingid]}"
    }
    @client[:pong] = proc {|data|
      @last_ping = nil
    }
    @client[:nick] = proc {|data|
      source = data[:source]
      old = data[:oldnick]
      new = data[:newnick]
      m = NickMessage.new(self, server, source, old, new)
      if source == myself
        debug "my nick is now #{new}"
      end
      data[:is_on].each { |ch|
        irclog "@ #{old} is now known as #{new}", ch
      }
      @plugins.delegate("listen", m)
      @plugins.delegate("nick", m)
    }
    @client[:quit] = proc {|data|
      source = data[:source]
      message = data[:message]
      m = QuitMessage.new(self, server, source, source, message)
      data[:was_on].each { |ch|
        irclog "@ Quit: #{source}: #{message}", ch
      }
      @plugins.delegate("listen", m)
      @plugins.delegate("quit", m)
    }
    @client[:mode] = proc {|data|
      irclog "@ Mode #{data[:modestring]} by #{data[:source]}", data[:channel]
    }
    @client[:join] = proc {|data|
      m = JoinMessage.new(self, server, data[:source], data[:channel], data[:message])
      irclogjoin(m)

      @plugins.delegate("listen", m)
      @plugins.delegate("join", m)
    }
    @client[:part] = proc {|data|
      m = PartMessage.new(self, server, data[:source], data[:channel], data[:message])
      irclogpart(m)

      @plugins.delegate("listen", m)
      @plugins.delegate("part", m)
    }
    @client[:kick] = proc {|data|
      m = KickMessage.new(self, server, data[:source], data[:target], data[:channel],data[:message])
      irclogkick(m)

      @plugins.delegate("listen", m)
      @plugins.delegate("kick", m)
    }
    @client[:invite] = proc {|data|
      if data[:target] == myself
        join data[:channel] if @auth.allow?("join", data[:source], data[:source].nick)
      end
    }
    @client[:changetopic] = proc {|data|
      m = TopicMessage.new(self, server, data[:source], data[:channel], data[:topic])
      irclogtopic(m)

      @plugins.delegate("listen", m)
      @plugins.delegate("topic", m)
    }
    @client[:topic] = proc { |data|
      irclog "@ Topic is \"#{data[:topic]}\"", data[:channel]
    }
    @client[:topicinfo] = proc { |data|
      channel = data[:channel]
      topic = channel.topic
      irclog "@ Topic set by #{topic.set_by} on #{topic.set_on}", channel
      m = TopicMessage.new(self, server, data[:source], channel, topic)

      @plugins.delegate("listen", m)
      @plugins.delegate("topic", m)
    }
    @client[:names] = proc { |data|
      @plugins.delegate "names", data[:channel], data[:users]
    }
    @client[:unknown] = proc { |data|
      #debug "UNKNOWN: #{data[:serverstring]}"
      irclog data[:serverstring], ".unknown"
    }

    set_default_send_options :newlines => @config['send.newlines'].to_sym,
      :join_with => @config['send.join_with'].dup,
      :max_lines => @config['send.max_lines'],
      :overlong => @config['send.overlong'].to_sym,
      :split_at => Regexp.new(@config['send.split_at']),
      :purge_split => @config['send.purge_split'],
      :truncate_text => @config['send.truncate_text'].dup
  end

  def set_default_send_options(opts={})
    # Default send options for NOTICE and PRIVMSG
    unless defined? @default_send_options
      @default_send_options = {
        :queue_channel => nil,      # use default queue channel
        :queue_ring => nil,         # use default queue ring
        :newlines => :split,        # or :join
        :join_with => ' ',          # by default, use a single space
        :max_lines => 0,          # maximum number of lines to send with a single command
        :overlong => :split,        # or :truncate
        # TODO an array of splitpoints would be preferrable for this option:
        :split_at => /\s+/,         # by default, split overlong lines at whitespace
        :purge_split => true,       # should the split string be removed?
        :truncate_text => "#{Reverse}...#{Reverse}"  # text to be appened when truncating
      }
    end
    @default_send_options.update opts unless opts.empty?
    end

  # checks if we should be quiet on a channel
  def quiet_on?(channel)
    return @quiet.include?('*') || @quiet.include?(channel.downcase)
  end

  def set_quiet(channel)
    if channel
      ch = channel.downcase.dup
      @quiet << ch unless @quiet.include?(ch)
    else
      @quiet.clear
      @quiet << '*'
    end
  end

  def reset_quiet(channel)
    if channel
      @quiet.delete channel.downcase
    else
      @quiet.clear
    end
  end

  # things to do when we receive a signal
  def got_sig(sig)
    debug "received #{sig}, queueing quit"
    $interrupted += 1
    quit unless @quit_mutex.locked?
    debug "interrupted #{$interrupted} times"
    if $interrupted >= 3
      debug "drastic!"
      log_session_end
      exit 2
    end
  end

  # connect the bot to IRC
  def connect
    begin
      trap("SIGINT") { got_sig("SIGINT") }
      trap("SIGTERM") { got_sig("SIGTERM") }
      trap("SIGHUP") { got_sig("SIGHUP") }
    rescue ArgumentError => e
      debug "failed to trap signals (#{e.inspect}): running on Windows?"
    rescue => e
      debug "failed to trap signals: #{e.inspect}"
    end
    begin
      quit if $interrupted > 0
      @socket.connect
    rescue => e
      raise e.class, "failed to connect to IRC server at #{@config['server.name']} #{@config['server.port']}: " + e
    end
    quit if $interrupted > 0
    @socket.emergency_puts "PASS " + @config['server.password'] if @config['server.password']
    @socket.emergency_puts "NICK #{@config['irc.nick']}\nUSER #{@config['irc.user']} 4 #{@config['server.name']} :Ruby bot. (c) Tom Gilbert"
    quit if $interrupted > 0
  end

  # begin event handling loop
  def mainloop
    while true
      begin
        quit if $interrupted > 0
        connect
        @timer.start

        while @socket.connected?
          quit if $interrupted > 0

          # Wait for messages and process them as they arrive. If nothing is
          # received, we call the ping_server() method that will PING the
          # server if appropriate, or raise a TimeoutError if no PONG has been
          # received in the user-chosen timeout since the last PING sent.
          if @socket.select(1)
            break unless reply = @socket.gets
            @last_rec = Time.now
            @client.process reply
          else
            ping_server
          end
        end

      # I despair of this. Some of my users get "connection reset by peer"
      # exceptions that ARENT SocketError's. How am I supposed to handle
      # that?
      rescue SystemExit
        log_session_end
        exit 0
      rescue Errno::ETIMEDOUT, Errno::ECONNABORTED, TimeoutError, SocketError => e
        error "network exception: #{e.class}: #{e}"
        debug e.backtrace.join("\n")
      rescue BDB::Fatal => e
        fatal "fatal bdb error: #{e.class}: #{e}"
        fatal e.backtrace.join("\n")
        DBTree.stats
        # Why restart? DB problems are serious stuff ...
        # restart("Oops, we seem to have registry problems ...")
        log_session_end
        exit 2
      rescue Exception => e
        error "non-net exception: #{e.class}: #{e}"
        error e.backtrace.join("\n")
      rescue => e
        fatal "unexpected exception: #{e.class}: #{e}"
        fatal e.backtrace.join("\n")
        log_session_end
        exit 2
      end

      stop_server_pings
      server.clear
      if @socket.connected?
        @socket.clearq
        @socket.shutdown
      end

      log "disconnected"

      quit if $interrupted > 0

      log "waiting to reconnect"
      sleep @config['server.reconnect_wait']
    end
  end

  # type:: message type
  # where:: message target
  # message:: message text
  # send message +message+ of type +type+ to target +where+
  # Type can be PRIVMSG, NOTICE, etc, but those you should really use the
  # relevant say() or notice() methods. This one should be used for IRCd
  # extensions you want to use in modules.
  def sendmsg(type, where, original_message, options={})
    opts = @default_send_options.merge(options)

    # For starters, set up appropriate queue channels and rings
    mchan = opts[:queue_channel]
    mring = opts[:queue_ring]
    if mchan
      chan = mchan
    else
      chan = where
    end
    if mring
      ring = mring
    else
      case where
      when User
        ring = 1
      else
        ring = 2
      end
    end

    message = original_message.to_s.gsub(/[\r\n]+/, "\n")
    case opts[:newlines]
    when :join
      lines = [message.gsub("\n", opts[:join_with])]
    when :split
      lines = Array.new
      message.each_line { |line|
        line.chomp!
        next unless(line.size > 0)
        lines << line
      }
    else
      raise "Unknown :newlines option #{opts[:newlines]} while sending #{original_message.inspect}"
    end

    # The IRC protocol requires that each raw message must be not longer
    # than 512 characters. From this length with have to subtract the EOL
    # terminators (CR+LF) and the length of ":botnick!botuser@bothost "
    # that will be prepended by the server to all of our messages.

    # The maximum raw message length we can send is therefore 512 - 2 - 2
    # minus the length of our hostmask.

    max_len = 508 - myself.fullform.size

    # On servers that support IDENTIFY-MSG, we have to subtract 1, because messages
    # will have a + or - prepended
    if server.capabilities[:"identify-msg"]
      max_len -= 1
    end

    # When splitting the message, we'll be prefixing the following string:
    # (e.g. "PRIVMSG #rbot :")
    fixed = "#{type} #{where} :"

    # And this is what's left
    left = max_len - fixed.size

    case opts[:overlong]
    when :split
      truncate = false
      split_at = opts[:split_at]
    when :truncate
      truncate = opts[:truncate_text]
      truncate = @default_send_options[:truncate_text] if truncate.size > left
      truncate = "" if truncate.size > left
    else
      raise "Unknown :overlong option #{opts[:overlong]} while sending #{original_message.inspect}"
    end

    # Counter to check the number of lines sent by this command
    cmd_lines = 0
    max_lines = opts[:max_lines]
    maxed = false
    line = String.new
    lines.each { |msg|
      begin
        if max_lines > 0 and cmd_lines == max_lines - 1
          truncate = opts[:truncate_text]
          truncate = @default_send_options[:truncate_text] if truncate.size > left
          truncate = "" if truncate.size > left
          maxed = true
        end
        if(left >= msg.size) and not maxed
          sendq "#{fixed}#{msg}", chan, ring
          log_sent(type, where, msg)
          cmd_lines += 1
          break
        end
        if truncate
          line.replace msg.slice(0, left-truncate.size)
          # line.sub!(/\s+\S*$/, truncate)
          line << truncate
          raise "PROGRAMMER ERROR! #{line.inspect} of size #{line.size} > #{left}" if line.size > left
          sendq "#{fixed}#{line}", chan, ring
          log_sent(type, where, line)
          return
        end
        line.replace msg.slice!(0, left)
        lastspace = line.rindex(opts[:split_at])
        if(lastspace)
          msg.replace line.slice!(lastspace, line.size) + msg
          msg.gsub!(/^#{opts[:split_at]}/, "") if opts[:purge_split]
        end
        sendq "#{fixed}#{line}", chan, ring
        log_sent(type, where, line)
        cmd_lines += 1
      end while(msg.size > 0)
    }
  end

  # queue an arbitraty message for the server
  def sendq(message="", chan=nil, ring=0)
    # temporary
    @socket.queue(message, chan, ring)
  end

  # send a notice message to channel/nick +where+
  def notice(where, message, options={})
    return if where.kind_of?(Channel) and quiet_on?(where)
    sendmsg "NOTICE", where, message, options
  end

  # say something (PRIVMSG) to channel/nick +where+
  def say(where, message, options={})
    return if where.kind_of?(Channel) and quiet_on?(where)
    sendmsg "PRIVMSG", where, message, options
  end

  # perform a CTCP action with message +message+ to channel/nick +where+
  def action(where, message, options={})
    return if where.kind_of?(Channel) and quiet_on?(where)
    mchan = options.fetch(:queue_channel, nil)
    mring = options.fetch(:queue_ring, nil)
    if mchan
      chan = mchan
    else
      chan = where
    end
    if mring
      ring = mring
    else
      case where
      when User
        ring = 1
      else
        ring = 2
      end
    end
    # FIXME doesn't check message length. Can we make this exploit sendmsg?
    sendq "PRIVMSG #{where} :\001ACTION #{message}\001", chan, ring
    case where
    when Channel
      irclog "* #{myself} #{message}", where
    else
      irclog "* #{myself}[#{where}] #{message}", where
    end
  end

  # quick way to say "okay" (or equivalent) to +where+
  def okay(where)
    say where, @lang.get("okay")
  end

  # log IRC-related message +message+ to a file determined by +where+.
  # +where+ can be a channel name, or a nick for private message logging
  def irclog(message, where="server")
    message = message.chomp
    stamp = Time.now.strftime("%Y/%m/%d %H:%M:%S")
    where = where.downcase.gsub(/[:!?$*()\/\\<>|"']/, "_")
    unless(@logs.has_key?(where))
      @logs[where] = File.new("#{@botclass}/logs/#{where}", "a")
      @logs[where].sync = true
    end
    @logs[where].puts "[#{stamp}] #{message}"
    #debug "[#{stamp}] <#{where}> #{message}"
  end

  # set topic of channel +where+ to +topic+
  def topic(where, topic)
    sendq "TOPIC #{where} :#{topic}", where, 2
  end

  # disconnect from the server and cleanup all plugins and modules
  def shutdown(message = nil)
    @quit_mutex.synchronize do
      debug "Shutting down ..."
      ## No we don't restore them ... let everything run through
      # begin
      #   trap("SIGINT", "DEFAULT")
      #   trap("SIGTERM", "DEFAULT")
      #   trap("SIGHUP", "DEFAULT")
      # rescue => e
      #   debug "failed to restore signals: #{e.inspect}\nProbably running on windows?"
      # end
      message = @lang.get("quit") if (message.nil? || message.empty?)
      if @socket.connected?
        debug "Clearing socket"
        @socket.clearq
        debug "Sending quit message"
        @socket.emergency_puts "QUIT :#{message}"
        debug "Flushing socket"
        @socket.flush
        debug "Shutting down socket"
        @socket.shutdown
      end
      debug "Logging quits"
      server.channels.each { |ch|
        irclog "@ quit (#{message})", ch
      }
      debug "Saving"
      save
      debug "Cleaning up"
      @save_mutex.synchronize do
        @plugins.cleanup
      end
      # debug "Closing registries"
      # @registry.close
      debug "Cleaning up the db environment"
      DBTree.cleanup_env
      log "rbot quit (#{message})"
    end
  end

  # message:: optional IRC quit message
  # quit IRC, shutdown the bot
  def quit(message=nil)
    begin
      shutdown(message)
    ensure
      exit 0
    end
  end

  # totally shutdown and respawn the bot
  def restart(message = false)
    msg = message ? message : "restarting, back in #{@config['server.reconnect_wait']}..."
    shutdown(msg)
    sleep @config['server.reconnect_wait']
    # now we re-exec
    # Note, this fails on Windows
    exec($0, *@argv)
  end

  # call the save method for all of the botmodules
  def save
    @save_mutex.synchronize do
      @plugins.save
      DBTree.cleanup_logs
    end
  end

  # call the rescan method for all of the botmodules
  def rescan
    @save_mutex.synchronize do
      @lang.rescan
      @plugins.rescan
    end
  end

  # channel:: channel to join
  # key::     optional channel key if channel is +s
  # join a channel
  def join(channel, key=nil)
    if(key)
      sendq "JOIN #{channel} :#{key}", channel, 2
    else
      sendq "JOIN #{channel}", channel, 2
    end
  end

  # part a channel
  def part(channel, message="")
    sendq "PART #{channel} :#{message}", channel, 2
  end

  # attempt to change bot's nick to +name+
  def nickchg(name)
    sendq "NICK #{name}"
  end

  # changing mode
  def mode(channel, mode, target)
    sendq "MODE #{channel} #{mode} #{target}", channel, 2
  end

  # kicking a user
  def kick(channel, user, msg)
    sendq "KICK #{channel} #{user} :#{msg}", channel, 2
  end

  # m::     message asking for help
  # topic:: optional topic help is requested for
  # respond to online help requests
  def help(topic=nil)
    topic = nil if topic == ""
    case topic
    when nil
      helpstr = "help topics: "
      helpstr += @plugins.helptopics
      helpstr += " (help <topic> for more info)"
    else
      unless(helpstr = @plugins.help(topic))
        helpstr = "no help for topic #{topic}"
      end
    end
    return helpstr
  end

  # returns a string describing the current status of the bot (uptime etc)
  def status
    secs_up = Time.new - @startup_time
    uptime = Utils.secs_to_string secs_up
    # return "Uptime #{uptime}, #{@plugins.length} plugins active, #{@registry.length} items stored in registry, #{@socket.lines_sent} lines sent, #{@socket.lines_received} received."
    return "Uptime #{uptime}, #{@plugins.length} plugins active, #{@socket.lines_sent} lines sent, #{@socket.lines_received} received."
  end

  # We want to respond to a hung server in a timely manner. If nothing was received
  # in the user-selected timeout and we haven't PINGed the server yet, we PING
  # the server. If the PONG is not received within the user-defined timeout, we
  # assume we're in ping timeout and act accordingly.
  def ping_server
    act_timeout = @config['server.ping_timeout']
    return if act_timeout <= 0
    now = Time.now
    if @last_rec && now > @last_rec + act_timeout
      if @last_ping.nil?
        # No previous PING pending, send a new one
        sendq "PING :rbot"
        @last_ping = Time.now
      else
        diff = now - @last_ping
        if diff > act_timeout
          debug "no PONG from server in #{diff} seconds, reconnecting"
          # the actual reconnect is handled in the main loop:
          raise TimeoutError, "no PONG from server in #{diff} seconds"
        end
      end
    end
  end

  def stop_server_pings
    # cancel previous PINGs and reset time of last RECV
    @last_ping = nil
    @last_rec = nil
  end

  private

  def irclogprivmsg(m)
    if(m.action?)
      if(m.private?)
        irclog "* [#{m.sourcenick}(#{m.sourceaddress})] #{m.message}", m.sourcenick
      else
        irclog "* #{m.sourcenick} #{m.message}", m.target
      end
    else
      if(m.public?)
        irclog "<#{m.sourcenick}> #{m.message}", m.target
      else
        irclog "[#{m.sourcenick}(#{m.sourceaddress})] #{m.message}", m.sourcenick
      end
    end
  end

  # log a message. Internal use only.
  def log_sent(type, where, message)
    case type
      when "NOTICE"
        case where
        when Channel
          irclog "-=#{myself}=- #{message}", where
        else
          irclog "[-=#{where}=-] #{message}", where
        end
      when "PRIVMSG"
        case where
        when Channel
          irclog "<#{myself}> #{message}", where
        else
          irclog "[msg(#{where})] #{message}", where
        end
    end
  end

  def irclogjoin(m)
    if m.address?
      debug "joined channel #{m.channel}"
      irclog "@ Joined channel #{m.channel}", m.channel
    else
      irclog "@ #{m.sourcenick} joined channel #{m.channel}", m.channel
    end
  end

  def irclogpart(m)
    if(m.address?)
      debug "left channel #{m.channel}"
      irclog "@ Left channel #{m.channel} (#{m.message})", m.channel
    else
      irclog "@ #{m.sourcenick} left channel #{m.channel} (#{m.message})", m.channel
    end
  end

  def irclogkick(m)
    if(m.address?)
      debug "kicked from channel #{m.channel}"
      irclog "@ You have been kicked from #{m.channel} by #{m.sourcenick} (#{m.message})", m.channel
    else
      irclog "@ #{m.target} has been kicked from #{m.channel} by #{m.sourcenick} (#{m.message})", m.channel
    end
  end

  def irclogtopic(m)
    if m.source == myself
      irclog "@ I set topic \"#{m.topic}\"", m.channel
    else
      irclog "@ #{m.source} set topic \"#{m.topic}\"", m.channel
    end
  end

end

end