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machine.js

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
  const fetchMachine = Machine({
    id: 'services-and-provision',
    initial: 'init',
    states: {
      init: {
        always: [
          {
            target: 'select-entities',
            cond: 'lastEventIsNext'
          },
          {
            target: 'answer-questions',
            actions: ['assignLastEntity'],
            cond: 'lastEntityNeedsAnswerQuestions'
          },
          {
            target: 'provide-documents',
            actions: ['assignLastEntity'],
            cond: 'lastEntityNeedsProvideDocuments'
          },
          {
            target: 'select-services',
            actions: ['assignLastEntity'],
            cond: 'lastEntityIsApplyingForServices'
          }
        ]
      },
      'select-entities': {
        on: {
          NEXT: [
            {
              target: 'select-services',
              actions: ['assignNextEntity'],
              cond: 'nextEntityIsApplyingForServices'
            },
            {
              target: 'provide-documents',
              actions: ['assignNextEntity'],
              cond: 'nextEntityNeedsProvideDocuments'
            },
            {
              target: 'answer-questions',
              actions: ['assignNextEntity'],
              cond: 'nextEntityNeedsAnswerQuestions'
            },
            {
              target: 'provide-documents',
              actions: ['assignNextEntityThatNeedsProvideDocuments'],
              cond: 'hasSomeNextEntityToProvideDocument'
            },
            {
              target: 'answer-questions',
              actions: ['assignNextEntityThatNeedsAnswerQuestions'],
              cond: 'hasSomeNextEntityToAnswerQuestions'
            },
            {
              target: 'success'
            }
          ]
        }
      },
      'select-services': {
        entry: ['assignCurrentEntityFromQueryString', 'clearCurrentEntityCards'],
        on: {
          NEXT: [
            {
              target: 'provide-documents',
              cond: 'currentEntityNeedsProvideDocuments'
            },
            {
              target: 'answer-questions',
              cond: 'currentEntityNeedsAnswerQuestions'
            },
            {
              target: 'select-services',
              actions: ['assignNextEntity'],
              cond: 'nextEntityIsApplyingForServices'
            },
            {
              target: 'provide-documents',
              actions: ['assignNextEntity'],
              cond: 'nextEntityNeedsProvideDocuments'
            },
            {
              target: 'answer-questions',
              actions: ['assignNextEntity'],
              cond: 'nextEntityNeedsAnswerQuestions'
            },
            {
              target: 'provide-documents',
              actions: ['assignNextEntityThatNeedsProvideDocuments'],
              cond: 'hasSomeNextEntityToProvideDocument'
            },
            {
              target: 'answer-questions',
              actions: ['assignNextEntityThatNeedsAnswerQuestions'],
              cond: 'hasSomeNextEntityToAnswerQuestions'
            },
            {
              target: 'success'
            }
          ],
          BACK: [
            {
              target: 'answer-questions',
              actions: ['assignPreviousEntity'],
              cond: 'previousEntityNeedsAnswerQuestions'
            },
            {
              target: 'provide-documents',
              actions: ['assignPreviousEntity'],
              cond: 'previousEntityNeedsProvideDocuments'
            },
            {
              target: 'select-services',
              actions: ['assignPreviousEntity'],
              cond: 'previousEntityIsApplyingForServices'
            },
            {
              target: 'select-entities',
              actions: ['clearCurrentEntity']
            }
          ]
        }
      },
      'provide-documents': {
        entry: ['assignCurrentEntityFromQueryString', 'clearCurrentEntityCards'],
        on: {
          NEXT: [
            {
              target: 'answer-questions',
              cond: 'currentEntityNeedsAnswerQuestions'
            },
            {
              target: 'select-services',
              actions: ['assignNextEntity'],
              cond: 'nextEntityIsApplyingForServices'
            },
            {
              target: 'provide-documents',
              actions: ['assignNextEntity'],
              cond: 'nextEntityNeedsProvideDocuments'
            },
            {
              target: 'answer-questions',
              actions: ['assignNextEntity'],
              cond: 'nextEntityNeedsAnswerQuestions'
            },
            {
              target: 'provide-documents',
              actions: ['assignNextEntityThatNeedsProvideDocuments'],
              cond: 'hasSomeNextEntityToProvideDocument'
            },
            {
              target: 'answer-questions',
              actions: ['assignNextEntityThatNeedsAnswerQuestions'],
              cond: 'hasSomeNextEntityToAnswerQuestions'
            },
            {
              target: 'success'
            }
          ],
          BACK: [
            {
              target: 'select-services',
              cond: 'currentEntityIsApplyingForServices'
            },
            {
              target: 'answer-questions',
              actions: ['assignPreviousEntity'],
              cond: 'previousEntityNeedsAnswerQuestions'
            },
            {
              target: 'provide-documents',
              actions: ['assignPreviousEntity'],
              cond: 'previousEntityNeedsProvideDocuments'
            },
            {
              target: 'select-services',
              actions: ['assignPreviousEntity'],
              cond: 'previousEntityIsApplyingForServices'
            },
            {
              target: 'answer-questions',
              actions: ['assignPreviousEntityThatNeedsAnswerQuestions'],
              cond: 'hasSomePreviousEntityToAnswerQuestions'
            },
            {
              target: 'provide-documents',
              actions: ['assignPreviousEntityThatNeedsProvideDocuments'],
              cond: 'hasSomePreviousEntityToProvideDocument'
            },
            {
              target: 'select-entities',
              actions: ['clearCurrentEntity']
            }
          ]
        }
      },
      'answer-questions': {
        entry: ['assignCurrentEntityFromQueryString', 'clearCurrentEntityCards'],
        on: {
          NEXT: [
            {
              target: 'success',
              cond: 'currentEntityIsTheLastEntity'
            },
            {
              target: 'select-services',
              actions: ['assignNextEntity'],
              cond: 'nextEntityIsApplyingForServices'
            },
            {
              target: 'provide-documents',
              actions: ['assignNextEntity'],
              cond: 'nextEntityNeedsProvideDocuments'
            },
            {
              target: 'answer-questions',
              actions: ['assignNextEntity'],
              cond: 'nextEntityNeedsAnswerQuestions'
            },
            {
              target: 'provide-documents',
              actions: ['assignNextEntityThatNeedsProvideDocuments'],
              cond: 'hasSomeNextEntityToProvideDocument'
            },
            {
              target: 'answer-questions',
              actions: ['assingNextEntityThatNeedsAnswerQuestions'],
              cond: 'hasSomeNextEntityToAnswerQuestions'
            },
            {
              target: 'success'
            }
          ],
          BACK: [
            {
              target: 'provide-documents',
              cond: 'currentEntityNeedsProvideDocuments'
            },
            {
              target: 'select-services',
              cond: 'currentEntityIsApplyingForServices'
            },
            {
              target: 'answer-questions',
              actions: ['assignPreviousEntity'],
              cond: 'previousEntityNeedsAnswerQuestions'
            },
            {
              target: 'provide-documents',
              actions: ['assignPreviousEntity'],
              cond: 'previousEntityNeedsProvideDocuments'
            },
            {
              target: 'answer-questions',
              actions: ['assignPreviousEntityThatNeedsAnswerQuestions'],
              cond: 'hasSomePreviousEntityToAnswerQuestions'
            },
            {
              target: 'provide-documents',
              actions: ['assignPreviousEntityThatNeedsProvideDocuments'],
              cond: 'hasSomePreviousEntityToProvideDocument'
            },
            {
              target: 'select-entities',
              actions: ['clearCurrentEntity']
            }
          ]
        }
      },
      success: {
        type: 'final'
      }
    }
  });