A block that changes colour with how happy your village is

I would like to know at a glance how happy my villagers are by colour code. This would give a goal to reach to make all villagers happy and give best trade rates. Possibly even a scorecard you can look at as to how many villagers and how many offspring and nitwits in the village and what they need to be made happier. Things such as requests to build more housing or jobs blocks or protection.