service

type Message interface {
	GroupID() string
	UserName() string
	UserID() string
	MessageID() string
	Text() string
	UserType() string
}

type Monitor interface {
	ValueFor(cachedID int) int
}

type Service interface {
	PostText(key, text string, cacheID int, groupMessage Message)
	MessageFromJSON(reader io.Reader) Message
	ServiceMonitor() (Monitor, error)
}