class Action(MonkeyDocument):
    __collection__='actions'
    KIND_APPROVAL=u'approval request'
    KIND_MESSAGE=u'message'
    STATUS_DONE=u'done'
    STATUS_REJECTED=u'rejected'
    STATUS_PENDING=u'pending'
    STATUS_DELETED=u'deleted'
    CREATOR_SYSTEM=u'Monkey Application'
    LOCATION_INBOX=u'inbox'
    LOCATION_NONE=u''

    structure={
               'account':unicode,
               'project':unicode,
               'kind':IS(KIND_APPROVAL,KIND_MESSAGE),
               'user_creator':{'account_member_id':unicode, 'user_name':unicode},
               'created':datetime.datetime,
               'message':unicode,
               'payload':dict,
               'destination':{'account_member_id':unicode, 'user_name':unicode, 'location':unicode},
               'status':IS(STATUS_DONE,STATUS_PENDING,STATUS_DELETED,STATUS_REJECTED),
               'root_action_id':unicode,
               'dirty':bool,
               'show_as_activity':bool
               }

    required_fields = ['project','account', 'kind','user_creator.account_member_id','message']
    default_values = {'created':datetime.datetime.utcnow, 'kind':KIND_APPROVAL,
                      'status':STATUS_PENDING, 'dirty':False, 'show_as_activity':False,'destination.location':LOCATION_NONE}