TEXT       = 'Text'
MAP        = 'Map'
CARD       = 'Card'
NOTE       = 'Note'
SHARING    = 'Sharing'
PICTURE    = 'Picture'
RECORDING  = VOICE = 'Recording'
ATTACHMENT = 'Attachment'
VIDEO      = 'Video'
FRIENDS    = 'Friends'
SYSTEM     = 'System'

INCOME_MSG = [TEXT, MAP, CARD, NOTE, SHARING, PICTURE,
    RECORDING, VOICE, ATTACHMENT, VIDEO, FRIENDS, SYSTEM]