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machine.js

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
  // /home
  // /allow-location
  //   on yes -> start /results
  //   on no -> /invite to enter location
  // /invite to enter location
  // /loading
  // /results
  //   /no-selection
  //   /valid-selection
  //   /empty
  //   /error
  
  const fetchMachine = Machine({
    id: 'choose-home-patch',
    initial: 'allowLocation',
    states: {
      allowLocation: {
        on: {
          ALLOW_LOCATION: 'loading',
          NO_LOCATION: 'enterLocation',
        }
      },
      enterLocation: {
        on: {
          SUBMIT: 'loading',
        }
      },
      loading: {
        on: {
          ERROR: 'error',
          NO_RESULTS: 'noResults',
          RESULTS: 'results',
          SUBMIT: 'loading',
        }
      },
      results: {
        initial: 'noSelection',
        states: {
        noSelection: {
          on: {
            SELECT: 'selection',
          }
        },
        selection: {
          on: { 
            UN_SELECT: 'noSelection',
          }
        }}
      },
      noResults: {
        on: {
          SUBMIT: 'loading',
        }
      },
      error: {
        on: {
          SUBMIT: 'loading'
        }
      }
    }
  });