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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+/* global window */
+
+/**
+ * Redux store utils
+ * @module utils/create-store
+ */
+
+import { createStore, applyMiddleware } from "redux";
+import { waitUntilService } from "./middleware/wait-service";
+import { log } from "./middleware/log";
+import { promise } from "./middleware/promise";
+import { thunk } from "./middleware/thunk";
+import { timing } from "./middleware/timing";
+import { context } from "./middleware/context";
+
+/**
+ * @memberof utils/create-store
+ * @static
+ */
+
+/**
+ * This creates a dispatcher with all the standard middleware in place
+ * that all code requires. It can also be optionally configured in
+ * various ways, such as logging and recording.
+ *
+ * @param {object} opts:
+ * - log: log all dispatched actions to console
+ * - history: an array to store every action in. Should only be
+ * used in tests.
+ * - middleware: array of middleware to be included in the redux store
+ * @memberof utils/create-store
+ * @static
+ */
+const configureStore = (opts = {}) => {
+ const middleware = [
+ thunk(opts.makeThunkArgs),
+ context,
+ promise,
+
+ // Order is important: services must go last as they always
+ // operate on "already transformed" actions. Actions going through
+ // them shouldn't have any special fields like promises, they
+ // should just be normal JSON objects.
+ waitUntilService,
+ ];
+
+ if (opts.middleware) {
+ opts.middleware.forEach(fn => middleware.push(fn));
+ }
+
+ if (opts.log) {
+ middleware.push(log);
+ }
+
+ if (opts.timing) {
+ middleware.push(timing);
+ }
+
+ // Hook in the redux devtools browser extension if it exists
+ const devtoolsExt =
+ typeof window === "object" && window.devToolsExtension
+ ? window.devToolsExtension()
+ : f => f;
+
+ return applyMiddleware(...middleware)(devtoolsExt(createStore));
+};
+
+export default configureStore;