There has been extensive research on modeling emotions. Here is an example of a professor, but there are others (http://web.eecs.umich.edu/~emilykmp/ http://web

There has been extensive research on modeling emotions. Here is an example of a professor, but there are others (http://web.eecs.umich.edu/~emilykmp/ http://web.eecs.umich.edu/~emilykmp/). Apple recently acquired a machine learning startup that mainly focused on emotion.