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

machine.js

/*
 * FETCH MACHINE (work in progress)
 * preview: https://xstate.js.org/viz/?gist=0291cafd5f583c165a3ef1dd35bf02af
 */

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
  const sellMachine = Machine({
    id: 'sellVehicle',
    initial: 'idle',
    context: {
      busy: undefined,
      attempts: 0,
      retries: 0
    },
    states: {
      idle: {
        on: {
          FETCH_LIST: {
            target: 'loading',
            actions: assign({
              fetchingType: (ctx, event) => ctx.busy = 'LIST'
            }),
            cond: ctx => {
              ctx.busy = 'fetchingList'
              return ctx.attempts < 3
            }
          },
          FETCH_ITEM: {
            target: 'loading',
            actions: assign({
              fetchingType: (ctx, event) => ctx.busy = 'ITEM'
            }),
            cond: ctx => {
              ctx.busy = 'fetchingItem'
              return ctx.attempts < 3
            }
          }
        }
      },
      loading: {
        entry: assign({
          attempts: ctx => ctx.attempts + 1
        }),
        after: {
          TIMEOUT: 'failure'
        },
        on: {
          RESOLVE: 'success',
          REJECT: 'failure'
        }
      },
      success: {
        // type: 'final'
        initial: 'first',
        states: {
          first: {
            on: {
              '': {
                target: 'second',
                cond: 'maxAttempts'
              },
              NEXT: 'second'
            }
          },
          second: {
            on: {
              NEXT: 'third'
            }
          },
          third: {
            type: 'final'
          }
        }
      },
      failure: {
        on: {
          RETRY: {
            target: 'loading',
            actions: assign({
              retries: (context, event) => context.retries + 1
            })
          }
        }
      }
    }
  },
  {
  guards: {
    maxAttempts: ctx =>  ctx.attempts >= 3,
    listLoaded: ctx => ctx.busy === 'fetchingList',
    itemLoaded: ctx => ctx.busy === 'fetchingItem',
  },
  delays: {
    TIMEOUT: 2000
  }
});