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

machine.js

// Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
  const onFetchTripsSuccess = assign({
    basket: (ctx, e) => ({
      ...ctx.basket,
      selectedCompanies: Array(e.data && e.data.tripsWithDictionary.length).fill("")
    }),
    trips: (_, e) => e.data && e.data.tripsWithDictionary
  });
  
  const steps = {
    one: {
      valid: false,
      completed: false,
      companies: []
    },
    two: {
      valid: false,
      completed: false
    },
    three: {
      valid: false,
      completed: false
    }
  }
    
  const WITHOUT_FIRST_TRIP = "https://api.myjson.com/bins/yacvc";
  
  const fetchTrips = (ctx, e) => {
      
    console.log('CTX', {ctx, e})
    
    return fetch(WITHOUT_FIRST_TRIP).then(response => response.json());
  }
  
  const stepMachine = Machine({
    id: 'stepMachine',
    initial: 'stepOne',
    context: {
      locations: [],
      trips: [],
      basket: {
        allowedCompany: null,
        valid: false,
        selectedCompanies: ["", "", ""]
      },
      tripQuery: {
        type: "SINGLE",
        passengers: 1,
        vehicles: 0,
      },
      steps,
    },
    states: {
      stepOne: {
        initial: 'success',
        states: {
          idle: {
            on: {
              SEARCH: {
                target: 'searching'
              }
            },
          },
          searching: {
            invoke: {
              id: 'getTrips',
              src: 'fetchTrips',
              onDone: {
                target: 'success',
                actions: 'onFetchTripsSuccess'
              },
              onError: {
                target: 'error',
                actions: assign({ error: (ctx, e) => event.data })
              }
            }
          },
          success: {
            on: {
              NEXT: {
                target: '#stepMachine.stepTwo',
                actions: 'submitOne',
                cond: 'isBasketValid',
              },
              SEARCH: {
                target: 'searching'
              },
              SELECT_COMPANY: {
                actions: 'selectCompany'
              },
            }
          },
          error: {
              
          },
        },
        on: {
          TO_STEP_2: {
            target: 'stepTwo',
            cond: 'isOneCompleted'
          },
          TO_STEP_3: {
            target: 'stepThree',
            cond: 'isTwoCompleted'
          },
          SET_TRIP_QUERY: {
            actions: 'setTripQuery',
            cond: 'isValidTripQueryData'
          }
        }
      },
      stepTwo: {
          on: {
            NEXT: {
            target: 'stepThree',
            actions: 'submitTwo',
         
          },
          TO_STEP_1: {
            target: '#stepMachine.stepOne.success',
            cond: 'isOneCompleted'
          },
          TO_STEP_3: {
            target: 'stepThree',
            cond: 'isTwoCompleted'
          }
        }
      },
      stepThree: {
        on: {
          TO_STEP_2: {
            target: 'stepTwo',
            cond: 'isTwoCompleted'
          },
          TO_STEP_1: {
            target: '#stepMachine.stepOne.success',
            cond: 'isOneCompleted'
          }
        }
      }
    }
  }, {
    actions: {
      onFetchTripsSuccess,
      selectCompany: assign({
        basket: (ctx, e) => {
          let selectedCompanies = [...ctx.basket.selectedCompanies]
          
          selectedCompanies[e.idx] = e.value;
          
          const valid = ctx.basket.allowedCompany && selectedCompanies.every(company => company === ctx.basket.allowedCompany)
          
          const allowedCompany = e.idx === 0 ? e.value : ctx.basket.allowedCompany
          
          return ({
            valid,
            allowedCompany,
            selectedCompanies
          })
        }
      }),
      submitOne: assign({
        steps: ctx => ({
          ...ctx.steps,
          one: {
            completed: true  
          }
        })
      }),
      submitTwo: assign({
        steps: ctx => ({
          ...ctx.steps,
          two: {
            completed: true  
          }
        })
      }),
      setTripQuery: assign({
        tripQuery: (ctx, e) => ({
          ...ctx.tripQuery,
          [e.name]: e.payload
        })
      }),
      goBack: () => console.log('go back'),
      submit: () => console.log('submit')
    },
    guards: {
      isOneValid: ctx => ctx.steps.one.valid,
      isOneCompleted: ctx => ctx.steps.one.completed,
      isTwoCompleted: ctx => ctx.steps.two.completed,
      isThreeCompleted: ctx => ctx.steps.three.completed,
      isValidTripQueryData: (_, e) => e.name === "type" || e.name === "passengers" || e.name === "vehicles",
      isBasketValid: ctx => ctx.basket.valid
    },
    services: {
      fetchTrips
    }
  });