zus/lib/zus-core/src/createPromiseMiddleware.js

> a lightweight front-end framework.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = createPromiseMiddleware;

var _constants = require("./constants");

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) { 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 _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; var ownKeys = Object.keys(source); if (typeof Object.getOwnPropertySymbols === 'function') { ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) { return Object.getOwnPropertyDescriptor(source, sym).enumerable; })); } ownKeys.forEach(function (key) { _defineProperty(target, key, 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 createPromiseMiddleware(app) {
  return function () {
    return function (next) {
      return function (action) {
        var type = action.type;

        if (isEffect(type)) {
          return new Promise(function (resolve, reject) {
            next(_objectSpread({
              __zus_resolve: resolve,
              __zus_reject: reject
            }, action));
          });
        }

        return next(action);
      };
    };
  };

  function isEffect(type) {
    if (!type || typeof type !== 'string') return false;

    var _type$split = type.split(_constants.NAMESPACE_SEP),
        _type$split2 = _slicedToArray(_type$split, 1),
        namespace = _type$split2[0];

    var model = app._models.filter(function (m) {
      return m.namespace === namespace;
    })[0];

    if (model) {
      if (model.effects && model.effects[type]) {
        return true;
      }
    }

    return false;
  }
}