react-behave/build/cjs/useAsyncMemo/useAsyncMemo.js

A library of behaviors for React applications.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useAsyncMemo = useAsyncMemo;

var _react = _interopRequireDefault(require("react"));

var _asyncState = require("../asyncState");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }

function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }

function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }

function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance"); }

function _iterableToArrayLimit(arr, i) { if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === "[object Arguments]")) { return; } var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"] != null) _i["return"](); } finally { if (_d) throw _e; } } return _arr; }

function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }

function useAsyncMemo(factory, deps) {
  var _ref = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {},
      _ref$initialValue = _ref.initialValue,
      initialValue = _ref$initialValue === void 0 ? null : _ref$initialValue;

  var _React$useReducer = _react["default"].useReducer(_asyncState.asyncStateReducer, initialValue, _asyncState.initializeStateWithValue),
      _React$useReducer2 = _slicedToArray(_React$useReducer, 2),
      state = _React$useReducer2[0],
      dispatch = _React$useReducer2[1];

  _react["default"].useEffect(function () {
    var canceled = false;

    function requestValue() {
      return _requestValue.apply(this, arguments);
    }

    function _requestValue() {
      _requestValue = _asyncToGenerator(
      /*#__PURE__*/
      regeneratorRuntime.mark(function _callee() {
        var value;
        return regeneratorRuntime.wrap(function _callee$(_context) {
          while (1) {
            switch (_context.prev = _context.next) {
              case 0:
                dispatch({
                  type: _asyncState.START
                });
                _context.prev = 1;
                _context.next = 4;
                return factory();

              case 4:
                value = _context.sent;

                if (!canceled) {
                  dispatch({
                    type: _asyncState.SUCCESS,
                    value: value
                  });
                }

                _context.next = 11;
                break;

              case 8:
                _context.prev = 8;
                _context.t0 = _context["catch"](1);

                if (!canceled) {
                  dispatch({
                    type: _asyncState.ERROR,
                    error: _context.t0
                  });
                }

              case 11:
              case "end":
                return _context.stop();
            }
          }
        }, _callee, null, [[1, 8]]);
      }));
      return _requestValue.apply(this, arguments);
    }

    requestValue();
    return function () {
      canceled = true;
    };
  }, // We don't add `callback` to deps to let the caller manage it himself.
  // This is _ok_ as the latest `callback` will only be used if `deps`
  // changes, which is the behaviour of `React.useMemo`.
  // eslint-disable-next-line react-hooks/exhaustive-deps
  deps);

  return [state.value, state];
}