Codecademy export

Cart.js

import React from 'react';
import {
  calculateTotal,
  getCurrencySymbol,
} from '../../utilities/utilities.js';

// Import the changeItemQuantity() action creator.
import {changeItemQuantity} from './cartSlice.js';

export const Cart = (props) => {
  const { cart, currencyFilter, dispatch } = props;

  const onInputChangeHandler = (name, input) => {
    console.log(input);
    // If the user enters a bad value...
    if (input === '') {
      return;
    }

    // Otherwise, convert the input into a number and pass it along as the newQuantity.
    const newQuantity = Number(input);

    // Dispatch an action to change the quantity of the given name and quantity.
    dipatch(changeInputQuantity(name, newQuantity));

  };

  // Use the cart and currencyFilter slices to render their data.
  const cartElements = [];

  for (let item in cart) {
cartElements.push(createCartItem(item));
  }
  const total =  calculateTotal(cart, currencyFilter);

  return (
    <div id="cart-container">
      <ul id="cart-items">{cartElements}</ul>
      <h3 className="total">
        Total{' '}
        <span className="total-value">
          {getCurrencySymbol(currencyFilter)}{total} {currencyFilter}
        </span>
      </h3>
    </div>
  );

  function createCartItem(name) {
    const item = cart[name];

    if (item.quantity === 0) {
      return;
    }

    return (
      <li key={name}>
        <p>{name}</p>
        <select
          className="item-quantity"
          value={item.quantity}
          onChange={(e) => {
            onInputChangeHandler(name, e.target.value);
          }}
        >
          {[...Array(100).keys()].map((_, index) => (
            <option key={index} value={index}>
              {index}
            </option>
          ))}
        </select>
      </li>
    );
  }
};

cartSlice.js

export const addItem = (itemToAdd) => {
  return {
    type: 'cart/addItem',
    payload: itemToAdd,
  };
};

// Create your changeItemQuantity action creator here.
export const changeItemQuantity = ({name, newQuantity}) => {
  return {
  type: 'cart/changeItemQuantity',
  payload: {name, newQuantity},
  };
};


const initialCart = {};
export const cartReducer = (cart = initialCart, action) => {
  switch (action.type) {
    case 'cart/addItem': {
      const { name, price } = action.payload;

      // if the item already exists, increase the quantity by 1, otherwise set it to 1
      const quantity = cart[name] ? cart[name].quantity + 1 : 1;
      const newItem = { price, quantity };

      // Add the new item to the cart (or replace it if it existed already)
      return { 
        ...cart, 
        [name]: newItem 
      };
    }
    case 'cart/changeItemQuantity': {
      const { name, newQuantity } = action.payload;
      const itemToUpdate = cart[name];

      // Create a copy of itemToUpdate and update the quantity prop.
    const updatedItem = {...itemToUpdate,  quantity: newQuantity};
      // Return a copy of the cart with the updatedItem included.
      return {...cart, updatedItem};
    }
    default: {
      return cart;
    }
  }
};

index.js

import React from 'react';
import ReactDOM from 'react-dom';

import { App } from './app/App.js';
// Import the store here.
import { store} from './app/store.js';
 
// Pass state and dispatch props to the <App /> component.
const render = () => {
  ReactDOM.render(
    <App 
      state={store.getState()}
      dispatch={store.dispatch}
    />,
    document.getElementById('root')
  )
};
render();

// Subscribe render to the store.
store.subscribe(render);

store.js

// Import createStore and combineReducers here.
import {createStore, combineReducers} from 'redux';

// Import the slice reducers here.
import {inventoryReducer} from '../features/inventory/inventorySlice.js';
import {cartReducer} from '../features/cart/cartSlice.js';
import {currencyFilterReducer} from '../features/currencyFilter/currencyFilterSlice.js';

// Create and export the store here.
export const store = createStore(combineReducers({
  inventory: inventoryReducer,
  cart: cartReducer,
  currencyFilter: currencyFilterReducer
}));