react-hooks-async/dist/use-async-task.js

React custom hooks for async functions with abortability and composability

"use strict";

require("core-js/modules/es.symbol");

require("core-js/modules/es.symbol.description");

require("core-js/modules/es.symbol.iterator");

require("core-js/modules/es.array.concat");

require("core-js/modules/es.array.filter");

require("core-js/modules/es.array.for-each");

require("core-js/modules/es.array.from");

require("core-js/modules/es.array.is-array");

require("core-js/modules/es.array.iterator");

require("core-js/modules/es.array.slice");

require("core-js/modules/es.date.to-string");

require("core-js/modules/es.function.name");

require("core-js/modules/es.object.define-properties");

require("core-js/modules/es.object.define-property");

require("core-js/modules/es.object.get-own-property-descriptor");

require("core-js/modules/es.object.get-own-property-descriptors");

require("core-js/modules/es.object.keys");

require("core-js/modules/es.object.to-string");

require("core-js/modules/es.promise");

require("core-js/modules/es.regexp.to-string");

require("core-js/modules/es.string.iterator");

require("core-js/modules/web.dom-collections.for-each");

require("core-js/modules/web.dom-collections.iterator");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useAsyncTask = exports.SYMBOL_ABORTED = void 0;

require("regenerator-runtime/runtime");

var _react = require("react");

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

function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(n); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

function _iterableToArrayLimit(arr, i) { if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) 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 ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return 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); }); }; }

var SYMBOL_ABORTED = Symbol('ABORTED');
exports.SYMBOL_ABORTED = SYMBOL_ABORTED;

var createTask = function createTask(_ref) {
  var func = _ref.func,
      dispatchRef = _ref.dispatchRef;
  var taskId = Symbol('TASK_ID');
  var abortController = null;
  return {
    func: func,
    taskId: taskId,
    runId: null,
    start: function () {
      var _start = _asyncToGenerator( /*#__PURE__*/regeneratorRuntime.mark(function _callee() {
        var runId,
            _len,
            args,
            _key,
            result,
            _args = arguments;

        return regeneratorRuntime.wrap(function _callee$(_context) {
          while (1) {
            switch (_context.prev = _context.next) {
              case 0:
                if (abortController) {
                  abortController.abort();
                }

                abortController = new AbortController();
                runId = Symbol('RUN_ID');
                dispatchRef.current({
                  type: 'START',
                  taskId: taskId,
                  runId: runId
                });
                _context.prev = 4;

                for (_len = _args.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
                  args[_key] = _args[_key];
                }

                _context.next = 8;
                return func.apply(void 0, [abortController].concat(args));

              case 8:
                result = _context.sent;
                dispatchRef.current({
                  type: 'RESULT',
                  taskId: taskId,
                  runId: runId,
                  result: result
                });
                return _context.abrupt("return", result);

              case 13:
                _context.prev = 13;
                _context.t0 = _context["catch"](4);

                if (!(_context.t0.name === 'AbortError')) {
                  _context.next = 18;
                  break;
                }

                dispatchRef.current({
                  type: 'ABORT',
                  taskId: taskId,
                  runId: runId
                });
                return _context.abrupt("return", SYMBOL_ABORTED);

              case 18:
                dispatchRef.current({
                  type: 'ERROR',
                  taskId: taskId,
                  runId: runId,
                  error: _context.t0
                });
                throw _context.t0;

              case 20:
              case "end":
                return _context.stop();
            }
          }
        }, _callee, null, [[4, 13]]);
      }));

      function start() {
        return _start.apply(this, arguments);
      }

      return start;
    }(),
    abort: function abort() {
      if (abortController) {
        abortController.abort();
        abortController = null;
      }
    },
    started: false,
    pending: true,
    aborted: false,
    error: null,
    result: null
  };
};

var reducer = function reducer(task, action) {
  switch (action.type) {
    case 'INIT':
      return createTask(action);

    case 'START':
      if (task.taskId !== action.taskId) {
        return task; // bail out
      }

      return _objectSpread({}, task, {
        runId: action.runId,
        started: true,
        pending: true,
        aborted: false,
        error: null,
        result: null
      });

    case 'RESULT':
      if (task.taskId !== action.taskId || task.runId !== action.runId) {
        return task; // bail out
      }

      return _objectSpread({}, task, {
        started: false,
        pending: false,
        result: action.result
      });

    case 'ABORT':
      if (task.taskId !== action.taskId || task.runId !== action.runId) {
        return task; // bail out
      }

      return _objectSpread({}, task, {
        started: false,
        aborted: true
      });

    case 'ERROR':
      if (task.taskId !== action.taskId || task.runId !== action.runId) {
        return task; // bail out
      }

      return _objectSpread({}, task, {
        started: false,
        pending: false,
        error: action.error
      });

    default:
      throw new Error("unknown action type: ".concat(action.type));
  }
};

var useAsyncTask = function useAsyncTask(func) {
  var dispatchRef = (0, _react.useRef)(function () {
    throw new Error('not initialized');
  });

  var _useReducer = (0, _react.useReducer)(reducer, {
    func: func,
    dispatchRef: dispatchRef
  }, createTask),
      _useReducer2 = _slicedToArray(_useReducer, 2),
      task = _useReducer2[0],
      dispatch = _useReducer2[1];

  if (task.func !== func) {
    dispatch({
      type: 'INIT',
      func: func,
      dispatchRef: dispatchRef
    });
  }

  dispatchRef.current = dispatch;
  (0, _react.useEffect)(function () {
    var cleanup = function cleanup() {
      dispatchRef.current = function () {
        return null;
      };
    };

    return cleanup;
  }, []);
  return task;
};

exports.useAsyncTask = useAsyncTask;