Added a basic store, fleshing out for our use, including actions relevant to migationsTracker

src/redux/constants/action-types.js

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+export const ADD_ARTICLE = "ADD_ARTICLE";
+export const DATA_LOADED = "DATA_LOADED";
+export const API_ERRORED = "API_ERRORED";

src/redux/middleware/index.js

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+import { ADD_ARTICLE } from "../constants/action-types";
+
+const forbiddenWords = ["spam", "money"];
+
+export function forbiddenWordsMiddleware({ dispatch }) {
+  return function (next) {
+    return function (action) {
+      // do your stuff
+      if (action.type === ADD_ARTICLE) {
+        const foundWord = forbiddenWords.filter((word) =>
+          action.payload.title.includes(word)
+        );
+
+        if (foundWord.length) {
+          return dispatch({ type: "FOUND_BAD_WORD" });
+        }
+      }
+      return next(action);
+    };
+  };
+}

src/redux/reducers/index.js

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+import { ADD_ARTICLE, DATA_LOADED } from "../constants/action-types";
+
+const initialState = {
+  articles: [],
+  remoteArticles: [],
+};
+
+function rootReducer(state = initialState, action) {
+  if (action.type === ADD_ARTICLE) {
+    return Object.assign({}, state, {
+      articles: state.articles.concat(action.payload),
+    });
+  }
+
+  if (action.type === DATA_LOADED) {
+    return Object.assign({}, state, {
+      remoteArticles: state.remoteArticles.concat(action.payload),
+    });
+  }
+  return state;
+}
+
+export default rootReducer;

src/redux/store/index.js

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+import { createStore, applyMiddleware, compose } from "redux";
+import rootReducer from "../reducers";
+import { forbiddenWordsMiddleware } from "../middleware";
+import thunk from "redux-thunk";
+
+const storeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
+
+const store = createStore(
+  rootReducer,
+  storeEnhancers(applyMiddleware(forbiddenWordsMiddleware, thunk))
+);
+
+export default store;