[Bugs] #2192 UNSP: When owner leaves, shared activity does not always go away on his own view

[Sugar Labs Bugs]

#2192: When owner leaves, shared activity does not always go away on his own view
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    Reporter:  erikos                     |          Owner:  tomeu                      
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  sugar-presence-service     |        Version:  0.84.x                     
    Severity:  Unspecified                |       Keywords:                             
Distribution:  Unspecified                |   Status_field:  Unconfirmed                
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Comment(by erikos):

 I tracked this down to the following:

 http://git.sugarlabs.org/projects/sugar-presence-
 service/repos/mainline/blobs/sucrose-0.84/src/activity.py#line1192

 When 'A' leaves 'A' and 'B' are still in self._claimed_buddies.
 self_buddies only contains buddy 'A'. That means that new_buddies will
 contain 'B' when calling self._add_buddies(new_buddies). When we then try
 to remove buddy 'A' the disappeared signal is never called because the
 list of buddies is not empty (B has been added again).

 http://git.sugarlabs.org/projects/sugar-presence-
 service/repos/mainline/blobs/sucrose-0.84/src/activity.py#line784

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Ticket URL: <http://bugs.sugarlabs.org/ticket/2192#comment:1>
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