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 parseScannedData = assign((context, event) => {
  let { data } = event;

  let parsed = JSON.parse(data);
  let isValid = Array.isArray(parsed);
  
  if (!isValid) {
    throw new Error('Malformed');
  }
  
  return parsed;
});


  
  const fetchMachine = Machine({
 
 
 
 
 
   id: 'scan-qr-code',
  strict: true,
  initial: 'scanner',
  context: {
    intent: undefined,
    data: undefined,
    error: undefined,
    parseError: undefined,
    t: () => '',
  },
  states: {
    scanner: {
      id: 'scanner',
      initial: 'scanning',
      onDone: [
        {
          target: '#loginToDevice',
          cond: 'isQRLogin',
        },
        {
          target: '#addFriend',
          cond: 'isQRAddFriend',
        },
      ],
      states: {
        scanning: {
          on: {
            SCAN: 'parsing',
          },
        },
        parsing: {
          invoke: {
            id: 'parse',
            src: 'parseScannedData',
            onDone: {
              target: 'scanned',
              actions: assign({
                intent: (_, event) => event.data[0],
                data: (_, event) => event.data[1],
              }),
            },
            onError: '#error',
          },
          on: {
            PARSED: 'scanned',
          },
        },
        scanned: {
          type: 'final',
        },
      },
    },

    loginToDevice: {
      id: 'loginToDevice',
      initial: 'checkLogin',
      states: {
        checkLogin: {
          on: {
            '': [
              {
                target: 'askPermission',
                cond: 'isLoggedIn',
              },
              { target: '#error' },
            ],
          },
        },
        askPermission: {
          on: {
            DENY: '#error',
            ALLOW: 'transferAllowed',
          },
        },
        transferAllowed: {
          exit: ['destroyConnection'],
          invoke: {
            id: 'transfer-data',
            src: 'transferData',
            onDone: 'transferComplete',
            onError: '#scan-qr-code.error',
          },
        },
        transferComplete: {
          type: 'final',
        },
      },
    },
    addFriend: {
      id: 'addFriend',
      initial: 'determineExistence',
      // context: {
      //   exists: false,
      // },
      states: {
        determineExistence: {
          entry: ['doesContactExist', send('HANDLE_EXISTENCE')],
          on: {
            HANDLE_EXISTENCE: [
              {
                target: 'contactExists',
                cond: 'isContactKnown',
              },
              {
                target: 'needToAddContact',
                actions: ['addContact'],
              },
            ],
          },
        },
        needToAddContact: {},
        contactExists: {},
      },
    },
    
    error: { id: 'error', on: { RETRY: '#scanner'}},

  },

 

  }, {
    guards: {
      //isLoggedIn: () => true,
      //isQRLogin: () => true,
    }
  });