This is a Symfony (3.4) project which integrates chgst-bundle.
The application is very basic entry/exit system where you can register events of someone's entering any building and after that exiting it.
In first iteration (iteration-1 branch) it can only tell you if someone is in the building and how many people are in each building.
In second iteration (cqrs-es branch) I've added CQRS/ES and application can tell you same information at any point in the past. Also you can get more information like what are the busiest times.