Generated by XState Viz: https://xstate.js.org/viz

machine.js

const now = new Date();
const vehicles = [
	{ availableFrom: now },
	{ availableFrom: now.setMinutes(now.getMinutes() + 5) },
	{ availableFrom: null }
];

const VehicleTypeMachine = Machine({
  id: 'VehicleType',
  initial: 'unknown',
  context: {
		vehicles,
  },
  states: {
		unknown: {
			on: {
				'': [
					{ target: 'available', cond: 'isAvailable'},
					{ target: 'incoming', cond: 'isIncoming'},
					{ target: 'unavailable' }
				]
			}
		},
		available: {},
		incoming: {},
		unavailable: {},
  },
},
{
	guards: {
		isAvailable(context) {
			return context.vehicles.filter(vehicle => vehicle.availableFrom).some(vehicle => vehicle.availableFrom <= new Date());
		},
		isIncoming(context) {
			const unrented = context.vehicles
						.filter(vehicle => vehicle.availableFrom);
			return unrented.length ? 
				unrented.every(vehicle => vehicle.availableFrom > new Date()) : false;
		}
	}
});