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

machine.js

const isUndefined = (x) => typeof x === 'undefined';

const flightOpen = ({ flight }) => !isUndefined(flight);
const flightClosed = ({ flight }) => !!isUndefined(flight);

const flight = undefined;

const fetchMachine = Machine({
    id: 'flight',
    context: { flight, error: undefined },
    initial: 'unknown',
    states: {
      unknown: {
        on: {
          '': [
            { target: 'open', cond: flightOpen },
            { target: 'closed', cond: flightClosed }
          ]
        }
      },
      opening: {
        invoke: { // https://xstate.js.org/docs/guides/communication.html#invoking-promises
          id: 'createFlight',
          src: 'createFlight',
          onDone: {
            target: 'open',
            actions: 'assignOpenFlight'
          },
          onError: {
            target: 'failure',
            actions: 'assignError'
          }
        },
        entry: ['openMarketplace']
      },
      open: {
        on: {
          FLIGHT_DATA_CHANGED: { target: 'closing', actions: 'closeFlight' },
          CLOSE: { target: 'closing', actions: 'closeFlight' }
        },
        entry: ['notifyOpen']
      },
      closing: {
        invoke: { // https://xstate.js.org/docs/guides/communication.html#invoking-promises
          id: 'closeFlight',
          src: 'closeFlight',
          onDone: {
            target: 'closed',
            actions: 'assignClosedFlight'
          },
          onError: {
            target: 'failure',
            actions: 'assignError'
          }
        },
        entry: [ 'closeMarketplace']
      },
      closed: {
        on: {
          OPEN: { target: 'opening'},
          NO_PREVIOUS_FLIGHT_INFO: { target: 'opening'},
          FLIGHT_DATA_CHANGED: { target: 'opening'}
        },
        entry: ['notifyClose']
      },
      failure: {
      }
    }
  });