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 fetchMachine = Machine({
  id: "nearbyFriends",
  initial: "pending",
  context: {
    currentLocation: null,
    locationError: null,
    locationPersistError: null,
    locationPersistAttempted: false,
  },
  states: {
    pending: {
      on: {
        CHECK_PERMISSIONS: "checkingPermissions",
      },
    },
    checkingPermissions: {
      invoke: {
        src: "checkPermissions",
      },
      on: {
        PERMISSIONS_BLOCKED: "permissionsBlocked",
        PERMISSIONS_GRANTED: "fetchingLocation",
        PERMISSIONS_REQUESTABLE: "permissionsPending",
        PLATFORM_NOT_SUPPORTED: "unsupportedPlatform",
      },
    },
    permissionsPending: {
      on: {
        REQUEST_PERMISSION: "permissionsRequested",
      },
    },
    permissionsRequested: {
      invoke: {
        src: "requestPermissions",
        onDone: "fetchingLocation",
        onError: "permissionsBlocked",
      },
    },
    permissionsBlocked: {
      on: {
        REREQUEST_PERMISSION: "checkingPermissions",
      },
    },
    fetchingLocation: {
      invoke: {
        src: "readCurrentLocation",
        onDone: {
          target: "persistingLocation",
          actions: assign({ currentLocation: (_context, event) => event.data }),
        },
        onError: {
          target: "locationError",
          actions: assign({ locationError: (_context, event) => event.data }),
        },
      },
    },
    persistingLocation: {
      invoke: {
        src: "persistCurrentLocation",
      },
      on: {
        LOCATION_PERSISTED: {
          target: "friendsNearby",
          actions: assign({
            locationPersistError: (_context, _event) => null,
            locationPersistAttempted: (_context, _event) => true,
          }),
        },
        LOCATION_PERSIST_FAILED: {
          target: "locationPersistError",
          actions: assign({
            locationPersistError: (_context, event) => event.error,
            locationPersistAttempted: (_context, _event) => true,
          }),
        },
      },
    },
    friendsNearby: {
      on: {
        REREQUEST_PERMISSION: "checkingPermissions",
      },
    },
    locationPersistError: {
      on: {
        REREQUEST_PERMISSION: "checkingPermissions",
      },
    },
    locationError: {},
    unsupportedPlatform: {},
  },
});