This file is indexed.

/usr/share/pyshared/wokkel/iwokkel.py is in python-wokkel 0.7.0-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
# -*- test-case-name: wokkel.test.test_iwokkel -*-
#
# Copyright (c) Ralph Meijer.
# See LICENSE for details.

"""
Wokkel interfaces.
"""

__all__ = ['IXMPPHandler', 'IXMPPHandlerCollection',
           'IPubSubClient', 'IPubSubService', 'IPubSubResource',
           'IMUCClient', 'IMUCStatuses']

from zope.interface import Interface
from twisted.python.deprecate import deprecatedModuleAttribute
from twisted.python.versions import Version
from twisted.words.protocols.jabber.ijabber import IXMPPHandler
from twisted.words.protocols.jabber.ijabber import IXMPPHandlerCollection

deprecatedModuleAttribute(
        Version("Wokkel", 0, 7, 0),
        "Use twisted.words.protocols.jabber.ijabber.IXMPPHandler instead.",
        __name__,
        "IXMPPHandler")

deprecatedModuleAttribute(
        Version("Wokkel", 0, 7, 0),
        "Use twisted.words.protocols.jabber.ijabber.IXMPPHandlerCollection "
                "instead.",
        __name__,
        "IXMPPHandlerCollection")


class IDisco(Interface):
    """
    Interface for XMPP service discovery.
    """

    def getDiscoInfo(requestor, target, nodeIdentifier=''):
        """
        Get identity and features from this entity, node.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param target: The target entity to which the request is made.
        @type target: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The optional identifier of the node at this
            entity to retrieve the identify and features of.  The default is
            C{''}, meaning the root node.
        @type nodeIdentifier: C{unicode}
        """

    def getDiscoItems(requestor, target, nodeIdentifier=''):
        """
        Get contained items for this entity, node.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param target: The target entity to which the request is made.
        @type target: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The optional identifier of the node at this
                               entity to retrieve the identify and features of.
                               The default is C{''}, meaning the root node.
        @type nodeIdentifier: C{unicode}
        """



class IPubSubClient(Interface):

    def itemsReceived(event):
        """
        Called when an items notification has been received for a node.

        An item can be an element named C{item} or C{retract}. Respectively,
        they signal an item being published or retracted, optionally
        accompanied with an item identifier in the C{id} attribute.

        @param event: The items event.
        @type event: L{ItemsEvent<wokkel.pubsub.ItemsEvent>}
        """


    def deleteReceived(event):
        """
        Called when a deletion notification has been received for a node.

        @param event: The items event.
        @type event: L{ItemsEvent<wokkel.pubsub.DeleteEvent>}
        """


    def purgeReceived(event):
        """
        Called when a purge notification has been received for a node.

        Upon receiving this notification all items associated should be
        considered retracted.

        @param event: The items event.
        @type event: L{ItemsEvent<wokkel.pubsub.PurgeEvent>}
        """

    def createNode(service, nodeIdentifier=None):
        """
        Create a new publish subscribe node.

        @param service: The publish-subscribe service entity.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: Optional suggestion for the new node's
                               identifier. If omitted, the creation of an
                               instant node will be attempted.
        @type nodeIdentifier: C{unicode}
        @return: a deferred that fires with the identifier of the newly created
                 node. Note that this can differ from the suggested identifier
                 if the publish subscribe service chooses to modify or ignore
                 the suggested identifier.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def deleteNode(service, nodeIdentifier):
        """
        Delete a node.

        @param service: The publish-subscribe service entity.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: Identifier of the node to be deleted.
        @type nodeIdentifier: C{unicode}
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def subscribe(service, nodeIdentifier, subscriber):
        """
        Subscribe to a node with a given JID.

        @param service: The publish-subscribe service entity.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: Identifier of the node to subscribe to.
        @type nodeIdentifier: C{unicode}
        @param subscriber: JID to subscribe to the node.
        @type subscriber: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def unsubscribe(service, nodeIdentifier, subscriber):
        """
        Unsubscribe from a node with a given JID.

        @param service: The publish-subscribe service entity.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: Identifier of the node to unsubscribe from.
        @type nodeIdentifier: C{unicode}
        @param subscriber: JID to unsubscribe from the node.
        @type subscriber: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def publish(service, nodeIdentifier, items=[]):
        """
        Publish to a node.

        Node that the C{items} parameter is optional, because so-called
        transient, notification-only nodes do not use items and publish
        actions only signify a change in some resource.

        @param service: The publish-subscribe service entity.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: Identifier of the node to publish to.
        @type nodeIdentifier: C{unicode}
        @param items: List of item elements.
        @type items: C{list} of L{Item}
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """



class IPubSubService(Interface):
    """
    Interface for an XMPP Publish Subscribe Service.

    All methods that are called as the result of an XMPP request are to
    return a deferred that fires when the requested action has been performed.
    Alternatively, exceptions maybe raised directly or by calling C{errback}
    on the returned deferred.
    """

    def notifyPublish(service, nodeIdentifier, notifications):
        """
        Send out notifications for a publish event.

        @param service: The entity the notifications will originate from.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The identifier of the node that was published
            to.
        @type nodeIdentifier: C{unicode}
        @param notifications: The notifications as tuples of subscriber, the
            list of subscriptions and the list of items to be notified.
        @type notifications: C{list} of
            (L{JID<twisted.words.protocols.jabber.jid.JID>}, C{list} of
            L{Subscription<wokkel.pubsub.Subscription>}, C{list} of
            L{Element<twisted.words.xish.domish.Element>})
        """


    def notifyDelete(service, nodeIdentifier, subscribers,
                     redirectURI=None):
        """
        Send out node deletion notifications.

        @param service: The entity the notifications will originate from.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The identifier of the node that was deleted.
        @type nodeIdentifier: C{unicode}
        @param subscribers: The subscribers for which a notification should be
            sent out.
        @type subscribers: C{list} of
            L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param redirectURI: Optional XMPP URI of another node that subscribers
            are redirected to.
        @type redirectURI: C{str}
        """

    def publish(requestor, service, nodeIdentifier, items):
        """
        Called when a publish request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The identifier of the node to publish to.
        @type nodeIdentifier: C{unicode}
        @param items: The items to be published as elements.
        @type items: C{list} of C{Element<twisted.words.xish.domish.Element>}
        @return: deferred that fires on success.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def subscribe(requestor, service, nodeIdentifier, subscriber):
        """
        Called when a subscribe request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The identifier of the node to subscribe to.
        @type nodeIdentifier: C{unicode}
        @param subscriber: The entity to be subscribed.
        @type subscriber: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @return: A deferred that fires with a
                 L{Subscription<wokkel.pubsub.Subscription>}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def unsubscribe(requestor, service, nodeIdentifier, subscriber):
        """
        Called when a subscribe request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The identifier of the node to unsubscribe from.
        @type nodeIdentifier: C{unicode}
        @param subscriber: The entity to be unsubscribed.
        @type subscriber: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @return: A deferred that fires with C{None} when unsubscription has
                 succeeded.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def subscriptions(requestor, service):
        """
        Called when a subscriptions retrieval request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @return: A deferred that fires with a C{list} of subscriptions as
                 L{Subscription<wokkel.pubsub.Subscription>}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def affiliations(requestor, service):
        """
        Called when a affiliations retrieval request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @return: A deferred that fires with a C{list} of affiliations as
            C{tuple}s of (node identifier as C{unicode}, affiliation state as
            C{str}). The affiliation can be C{'owner'}, C{'publisher'}, or
            C{'outcast'}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def create(requestor, service, nodeIdentifier):
        """
        Called when a node creation request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The suggestion for the identifier of the node
            to be created. If the request did not include a suggestion for the
            node identifier, the value is C{None}.
        @type nodeIdentifier: C{unicode} or C{NoneType}
        @return: A deferred that fires with a C{unicode} that represents
                 the identifier of the new node.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def getConfigurationOptions():
        """
        Retrieve all known node configuration options.

        The returned dictionary holds the possible node configuration options
        by option name. The value of each entry represents the specifics for
        that option in a dictionary:

         - C{'type'} (C{str}): The option's type (see
           L{Field<wokkel.data_form.Field>}'s doc string for possible values).
         - C{'label'} (C{unicode}): A human readable label for this option.
         - C{'options'} (C{dict}): Optional list of possible values for this
           option.

        Example::

            {
            "pubsub#persist_items":
                {"type": "boolean",
                 "label": "Persist items to storage"},
            "pubsub#deliver_payloads":
                {"type": "boolean",
                 "label": "Deliver payloads with event notifications"},
            "pubsub#send_last_published_item":
                {"type": "list-single",
                 "label": "When to send the last published item",
                 "options": {
                     "never": "Never",
                     "on_sub": "When a new subscription is processed"}
                }
            }

        @rtype: C{dict}.
        """

    def getDefaultConfiguration(requestor, service, nodeType):
        """
        Called when a default node configuration request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeType: The type of node for which the configuration is
                         retrieved, C{'leaf'} or C{'collection'}.
        @type nodeType: C{str}
        @return: A deferred that fires with a C{dict} representing the default
                 node configuration. Keys are C{str}s that represent the
                 field name. Values can be of types C{unicode}, C{int} or
                 C{bool}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def getConfiguration(requestor, service, nodeIdentifier):
        """
        Called when a node configuration retrieval request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The identifier of the node to retrieve the
                               configuration from.
        @type nodeIdentifier: C{unicode}
        @return: A deferred that fires with a C{dict} representing the node
            configuration. Keys are C{str}s that represent the field name.
            Values can be of types C{unicode}, C{int} or C{bool}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def setConfiguration(requestor, service, nodeIdentifier, options):
        """
        Called when a node configuration change request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The identifier of the node to change the
                               configuration of.
        @type nodeIdentifier: C{unicode}
        @return: A deferred that fires with C{None} when the node's
                 configuration has been changed.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """

    def items(requestor, service, nodeIdentifier, maxItems, itemIdentifiers):
        """
        Called when a items retrieval request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The identifier of the node to retrieve items
                               from.
        @type nodeIdentifier: C{unicode}
        """

    def retract(requestor, service, nodeIdentifier, itemIdentifiers):
        """
        Called when a item retraction request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The identifier of the node to retract items
                               from.
        @type nodeIdentifier: C{unicode}
        """

    def purge(requestor, service, nodeIdentifier):
        """
        Called when a node purge request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The identifier of the node to be purged.
        @type nodeIdentifier: C{unicode}
        """

    def delete(requestor, service, nodeIdentifier):
        """
        Called when a node deletion request has been received.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The entity the request was addressed to.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: The identifier of the node to be delete.
        @type nodeIdentifier: C{unicode}
        """



class IPubSubResource(Interface):

    def locateResource(request):
        """
        Locate a resource that will handle the request.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        """


    def getInfo(requestor, service, nodeIdentifier):
        """
        Get node type and meta data.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The publish-subscribe service entity.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: Identifier of the node to request the info for.
        @type nodeIdentifier: C{unicode}
        @return: A deferred that fires with a dictionary. If not empty,
                 it must have the keys C{'type'} and C{'meta-data'} to keep
                 respectively the node type and a dictionary with the meta
                 data for that node.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def getNodes(requestor, service, nodeIdentifier):
        """
        Get all nodes contained by this node.

        @param requestor: The entity the request originated from.
        @type requestor: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param service: The publish-subscribe service entity.
        @type service: L{JID<twisted.words.protocols.jabber.jid.JID>}
        @param nodeIdentifier: Identifier of the node to request the childs
            for.
        @type nodeIdentifier: C{unicode}
        @return: A deferred that fires with a list of child node identifiers.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def getConfigurationOptions():
        """
        Retrieve all known node configuration options.

        The returned dictionary holds the possible node configuration options
        by option name. The value of each entry represents the specifics for
        that option in a dictionary:

         - C{'type'} (C{str}): The option's type (see
           L{Field<wokkel.data_form.Field>}'s doc string for possible values).
         - C{'label'} (C{unicode}): A human readable label for this option.
         - C{'options'} (C{dict}): Optional list of possible values for this
           option.

        Example::

            {
            "pubsub#persist_items":
                {"type": "boolean",
                 "label": "Persist items to storage"},
            "pubsub#deliver_payloads":
                {"type": "boolean",
                 "label": "Deliver payloads with event notifications"},
            "pubsub#send_last_published_item":
                {"type": "list-single",
                 "label": "When to send the last published item",
                 "options": {
                     "never": "Never",
                     "on_sub": "When a new subscription is processed"}
                }
            }

        @rtype: C{dict}.
        """


    def publish(request):
        """
        Called when a publish request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: deferred that fires on success.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def subscribe(request):
        """
        Called when a subscribe request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with a
                 L{Subscription<wokkel.pubsub.Subscription>}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def unsubscribe(request):
        """
        Called when a subscribe request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with C{None} when unsubscription has
                 succeeded.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def subscriptions(request):
        """
        Called when a subscriptions retrieval request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with a C{list} of subscriptions as
                 L{Subscription<wokkel.pubsub.Subscription>}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def affiliations(request):
        """
        Called when a affiliations retrieval request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with a C{list} of affiliations as
            C{tuple}s of (node identifier as C{unicode}, affiliation state as
            C{str}). The affiliation can be C{'owner'}, C{'publisher'}, or
            C{'outcast'}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def create(request):
        """
        Called when a node creation request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with a C{unicode} that represents
                 the identifier of the new node.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def default(request):
        """
        Called when a default node configuration request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with a C{dict} representing the default
                 node configuration. Keys are C{str}s that represent the
                 field name. Values can be of types C{unicode}, C{int} or
                 C{bool}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def configureGet(request):
        """
        Called when a node configuration retrieval request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with a C{dict} representing the node
            configuration. Keys are C{str}s that represent the field name.
            Values can be of types C{unicode}, C{int} or C{bool}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def configureSet(request):
        """
        Called when a node configuration change request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with C{None} when the node's
                 configuration has been changed.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def items(request):
        """
        Called when a items retrieval request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with a C{list} of L{pubsub.Item}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def retract(request):
        """
        Called when a item retraction request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with C{None} when the given items have
                 been retracted.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def purge(request):
        """
        Called when a node purge request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with C{None} when the node has been
                 purged.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def delete(request):
        """
        Called when a node deletion request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with C{None} when the node has been
                 deleted.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}
        """


    def affiliationsGet(request):
        """
        Called when an owner affiliations retrieval request been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}
        @return: A deferred that fires with a C{dict} of affiliations with the
            entity as key (L{JID<twisted.words.protocols.jabber.jid.JID>}) and
            the affiliation state as value (C{unicode}).  The affiliation can
            be C{u'owner'}, C{u'publisher'}, or C{u'outcast'}.
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}

        @note: Affiliations are always on the bare JID. An implementation of
        this method MUST NOT return JIDs with a resource part.
        """


    def affiliationsSet(request):
        """
        Called when a affiliations modify request has been received.

        @param request: The publish-subscribe request.
        @type request: L{wokkel.pubsub.PubSubRequest}

        @return: A deferred that fires with C{None} when the affiliation
            changes were succesfully processed..
        @rtype: L{Deferred<twisted.internet.defer.Deferred>}

        @note: Affiliations are always on the bare JID. The JIDs in
            L{wokkel.pubsub.PubSubRequest}'s C{affiliations} attribute are
            already stripped of any resource.
        """



class IMUCClient(Interface):
    """
    Multi-User Chat Client.

    A client interface to XEP-045 : http://xmpp.org/extensions/xep-0045.html
    """

    def receivedSubject(room, user, subject):
        """
        The room subject has been received.

        A subject is received when you join a room and when the subject is
        changed.

        @param room: The room the subject was accepted for.
        @type room: L{muc.Room}

        @param user: The user that set the subject.
        @type  user: L{muc.User}

        @param subject: The subject of the given room.
        @type subject: C{unicode}
        """


    def receivedHistory(room, user, message):
        """
        Past messages from a chat room have been received.

        This occurs when you join a room.
        """


    def configure(roomJID, options):
        """
        Configure a room.

        @param roomJID: The room to configure.
        @type roomJID: L{JID<twisted.words.protocols.jabber.jid.JID>}

        @param options: A mapping of field names to values, or C{None} to
            cancel.
        @type options: C{dict}
        """


    def getConfiguration(roomJID):
        """
        Grab the configuration from the room.

        This sends an iq request to the room.

        @param roomJID: The bare JID of the room.
        @type roomJID: L{JID<twisted.words.protocols.jabber.jid.JID>}

        @return: A deferred that fires with the room's configuration form as
            a L{data_form.Form} or C{None} if there are no configuration
            options available.
        """


    def join(roomJID, nick, historyOptions=None, password=None):
        """
        Join a MUC room by sending presence to it.

        @param roomJID: The JID of the room the entity is joining.
        @type roomJID: L{JID<twisted.words.protocols.jabber.jid.JID>}

        @param nick: The nick name for the entitity joining the room.
        @type nick: C{unicode}

        @param historyOptions: Options for conversation history sent by the
            room upon joining.
        @type historyOptions: L{HistoryOptions}

        @param password: Optional password for the room.
        @type password: C{unicode}

        @return: A deferred that fires when the entity is in the room or an
                 error has occurred.
        """


    def nick(roomJID, nick):
        """
        Change an entity's nick name in a MUC room.

        See: http://xmpp.org/extensions/xep-0045.html#changenick

        @param roomJID: The JID of the room, i.e. without a resource.
        @type roomJID: L{JID<twisted.words.protocols.jabber.jid.JID>}

        @param nick: The new nick name within the room.
        @type nick: C{unicode}
        """


    def leave(roomJID):
        """
        Leave a MUC room.

        See: http://xmpp.org/extensions/xep-0045.html#exit

        @param roomJID: The Room JID of the room to leave.
        @type roomJID: L{JID<twisted.words.protocols.jabber.jid.JID>}
        """


    def userJoinedRoom(room, user):
        """
        User has joined a MUC room.

        This method will need to be modified inorder for clients to
        do something when this event occurs.

        @param room: The room the user joined.
        @type  room: L{muc.Room}

        @param user: The user that joined the room.
        @type  user: L{muc.User}
        """


    def groupChat(roomJID, body):
        """
        Send a groupchat message.
        """


    def chat(occupantJID, body):
        """
        Send a private chat message to a user in a MUC room.

        See: http://xmpp.org/extensions/xep-0045.html#privatemessage

        @param occupantJID: The Room JID of the other user.
        @type occupantJID: L{JID<twisted.words.protocols.jabber.jid.JID>}
        """


    def register(roomJID, options):
        """
        Send a request to register for a room.

        @param roomJID: The bare JID of the room.
        @type roomJID: L{JID<twisted.words.protocols.jabber.jid.JID>}

        @param options: A mapping of field names to values, or C{None} to
            cancel.
        @type options: C{dict}
        """


    def subject(roomJID, subject):
        """
        Change the subject of a MUC room.

        See: http://xmpp.org/extensions/xep-0045.html#subject-mod

        @param roomJID: The bare JID of the room.
        @type roomJID: L{JID<twisted.words.protocols.jabber.jid.JID>}

        @param subject: The subject you want to set.
        @type subject: C{unicode}
        """


    def voice(roomJID):
        """
        Request voice for a moderated room.

        @param roomJID: The room jabber/xmpp entity id.
        @type roomJID: L{JID<twisted.words.protocols.jabber.jid.JID>}
        """


    def history(roomJID, messages):
        """
        Send history to create a MUC based on a one on one chat.

        See: http://xmpp.org/extensions/xep-0045.html#continue

        @param roomJID: The room jabber/xmpp entity id.
        @type roomJID: L{JID<twisted.words.protocols.jabber.jid.JID>}

        @param messages: The history to send to the room as an ordered list of
            message, represented by a dictionary with the keys C{'stanza'},
            holding the original stanza a
            L{Element<twisted.words.xish.domish.Element>}, and C{'timestamp'}
            with the timestamp.
        @type messages: C{list} of
            L{Element<twisted.words.xish.domish.Element>}
        """


    def ban(roomJID, entity, reason=None, sender=None):
        """
        Ban a user from a MUC room.

        @param roomJID: The bare JID of the room.
        @type roomJID: L{JID<twisted.words.protocols.jabber.jid.JID>}

        @param entity: The bare JID of the entity to be banned.
        @type entity: L{JID<twisted.words.protocols.jabber.jid.JID>}

        @param reason: The reason for banning the entity.
        @type reason: C{unicode}

        @param sender: The entity sending the request.
        @type sender: L{JID<twisted.words.protocols.jabber.jid.JID>}
        """


    def kick(roomJID, nick, reason=None, sender=None):
        """
        Kick a user from a MUC room.

        @param roomJID: The bare JID of the room.
        @type roomJID: L{JID<twisted.words.protocols.jabber.jid.JID>}

        @param nick: The occupant to be banned.
        @type nick: L{JID<twisted.words.protocols.jabber.jid.JID>} or
            C{unicode}

        @param reason: The reason given for the kick.
        @type reason: C{unicode}

        @param sender: The entity sending the request.
        @type sender: L{JID<twisted.words.protocols.jabber.jid.JID>}
        """



class IMUCStatuses(Interface):
    """
    Interface for a container of Multi-User Chat status conditions.
    """

    def __contains__(key):
        """
        Return if a status exists in the container.
        """


    def __iter__():
        """
        Return an iterator over the status codes.
        """


    def __len__():
        """
        Return the number of status conditions.
        """