Exercise - Ander Taxi

• A passenger may request a taxi ride, sending their current location and their desired destination.
• The system will pick one ore more available taxi drivers (prefer drivers that are close to the passenger).
• The taxi driver can accept or decline rides.
• The system makes sure that only one taxi driver is assigned to pick up a passenger.
• A taxi driver is in one of the following states:
  • Unavailable
  • Available
  • OfferedRide
  • OnRouteToPassenger
  • OnRouteToDestination
• A taxi driver will at all times report its current location and state to the system.
• Passengers will receive an invoice upon a completed ride, based on the distance and a rate (€/km).
• The system will log all messages.