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

machine.js

const test = (regex, base) => base && base.name && regex.test(base.name);
const isStart = ({ base }) => test(/^start-/, base);
const isFull = ({ base }) => !test(/^start-/, base);

const baseMachine = Machine({
  id: 'base',
  initial: 'init',
  context: {
    startBase: null,
    base: {}
  },
  states: {
    init: {
      on: {
        next: {
          target: 'addFields',
          actions: [
            assign({
              base: (context, base) => base
            })
          ]
        }
      }
    },
    addEnd: {
      on: {
        next: {
          target: 'addFields',
          actions: [
            assign({
              startBase: ({base: startBase}) => startBase,
              base: (_, endBase) => endBase
            })
          ]
        }
      }
    },

    addFields: {
      on: {
        next: {
          target: 'determineBaseType',
          actions: [
            assign({
              base: ({base}, {fields}) => ({
                ...base,
                fields
              })
            })
          ]
        }
      }
    },

    determineBaseType: {
      on: {
        '': [
          { target: 'startCreated', cond: isStart },
          { target: 'fullCreated', cond: isFull }
        ]
      }
    },

    fullCreated: {
      type: 'final'
    },

    startCreated: {
      on: {
        '': 'addEnd'
      }
    }
  }
});