PostDefault
PostAnnouncement
PostVote
Topic
+ getId()+ setId()+ getTitle()+ setTitle()
PostParticipate
TopicHandler
+ checkExist($topicId)+ checkExistByIds($topicIds)+ getchOne($topicId): Topic
HubHandler
+ checkExist($hubId)+ checkExistByIds($hubIds)+ getchOne($hubId): Hub
Participate
+ join(array $dataSet)
Hub
Post
