react-chrome-redux/lib/store/applyMiddleware.js

A set of utilities for building Redux applications in Google Chrome Extensions.

'use strict';

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

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

// Function taken from redux source
// https://github.com/reactjs/redux/blob/master/src/compose.js
function compose() {
  for (var _len = arguments.length, funcs = Array(_len), _key = 0; _key < _len; _key++) {
    funcs[_key] = arguments[_key];
  }

  if (funcs.length === 0) {
    return function (arg) {
      return arg;
    };
  }

  if (funcs.length === 1) {
    return funcs[0];
  }

  return funcs.reduce(function (a, b) {
    return function () {
      return a(b.apply(undefined, arguments));
    };
  });
}

// Based on redux implementation of applyMiddleware to support all standard
// redux middlewares
function applyMiddleware(store) {
  for (var _len2 = arguments.length, middlewares = Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
    middlewares[_key2 - 1] = arguments[_key2];
  }

  var _dispatch = function dispatch() {
    throw new Error('Dispatching while constructing your middleware is not allowed. ' + 'Other middleware would not be applied to this dispatch.');
  };

  var middlewareAPI = {
    getState: store.getState.bind(store),
    dispatch: function dispatch() {
      return _dispatch.apply(undefined, arguments);
    }
  };

  middlewares = (middlewares || []).map(function (middleware) {
    return middleware(middlewareAPI);
  });

  _dispatch = compose.apply(undefined, _toConsumableArray(middlewares))(store.dispatch);
  store.dispatch = _dispatch;

  return store;
}