[AFP-48 Shaphen Pangburn]: Clear global state cart when logging out

ecom-web/src/actions/cart_actions.js

 import * as ApiUtil from '../util/cart_api_util';
 
 export const RECEIVE_USER_CART = "RECEIVE_USER_CART";
+export const CLEAR_USER_CART = "CLEAR_USER_CART";
 
 const receiveUserCart = cart => ({
     type: RECEIVE_USER_CART,
     cart
 })
 
+export const clearUserCart = () => ({
+    type: CLEAR_USER_CART
+})
+
 export const fetchUserCart = userEmail => dispatch => ApiUtil.fetchUserCart(userEmail)
     .then(cart => dispatch(receiveUserCart(cart)));
 

ecom-web/src/components/session/session-container.jsx

 import { connect } from 'react-redux';
 import Session from './session';
 import {login, logOut} from '../../actions/session_actions';
-import { fetchUserCart, createUserCart } from '../../actions/cart_actions';
+import { fetchUserCart, createUserCart, clearUserCart } from '../../actions/cart_actions';
 
 const mSTP = state => ({
     currentUser: state.user
@@ -11,7 +11,8 @@ const mDTP = dispatch => ({
     login: (userResponse) => dispatch(login(userResponse)),
     logOut: () => dispatch(logOut()),
     getUserCart: userId => dispatch(fetchUserCart(userId)),
-    createCart: newCart => dispatch(createUserCart(newCart))
+    createCart: newCart => dispatch(createUserCart(newCart)),
+    clearCart: () => dispatch(clearUserCart())
 });
 
 export default connect(mSTP, mDTP)(Session);
\ No newline at end of file

ecom-web/src/components/session/session.jsx

@@ -42,6 +42,7 @@ export default class Session extends Component {
 
     logOutSuccess = (response) => {
         this.props.logOut()
+        this.props.clearCart()
         this.setState({logIn: false})
     }
     

ecom-web/src/reducers/cart_reducer.js

-import { RECEIVE_USER_CART } from '../actions/cart_actions';
+import { RECEIVE_USER_CART, CLEAR_USER_CART } from '../actions/cart_actions';
 
 const initialState = []
 
@@ -8,6 +8,8 @@ const cartReducer = (state = initialState, action) => {
     switch (action.type) {
         case RECEIVE_USER_CART:
             return newState.cart = action.cart.data.cartItems
+        case CLEAR_USER_CART:
+            return []
         default:
             return state;
     }