frontend/components/Cart.js


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import React from 'react';
import { Mutation, Query } from 'react-apollo';
import styled from 'styled-components';
import TakeMyMoney from './TakeMyMoney';
import formatMoney from '../lib/formatMoney';
import CartItem from './CartItem';
import { CURRENT_USER_QUERY, LOCAL_STATE_QUERY, TOGGLE_CART_MUTATION } from '../queries/index';
import calcTotalPrice from '../lib/calcTotalPrice';

const CartStyles = styled.div`
  padding: 20px;
  position: relative;
  background: white;
  position: fixed;
  height: 100%;
  top: 0;
  right: 0;
  width: 40%;
  min-width: 500px;
  bottom: 0;
  transform: translateX(100%);
  transition: all 0.3s;
  box-shadow: 0 0 10px 3px rgba(0, 0, 0, 0.2);
  z-index: 5;
  display: grid;
  grid-template-rows: auto 1fr auto;
  ${props => props.open && `transform: translateX(0);`};
  header {
    border-bottom: 5px solid ${props => props.theme.black};
    margin-bottom: 2rem;
    padding-bottom: 2rem;
  }
  footer {
    border-top: 10px double ${props => props.theme.black};
    margin-top: 2rem;
    padding-top: 2rem;
    display: grid;
    grid-template-columns: auto auto;
    align-items: center;
    font-size: 3rem;
    font-weight: 900;
    p {
      margin: 0;
    }
  }
`;

const CartUl = styled.ul`
  margin: 0;
  padding: 0;
  list-style: none;
  overflow: scroll;
`;

const Supreme = styled.h3`
  background: ${props => props.theme.red};
  color: white;
  display: inline-block;
  padding: 4px 5px;
  transform: skew(-3deg);
  margin: 0;
  font-size: 4rem;
`;

const CloseButton = styled.button`
  background: black;
  color: white;
  font-size: 3rem;
  border: 0;
  position: absolute;
  z-index: 2;
  right: 0;
`;

const Cart = props => (
  <Mutation mutation={TOGGLE_CART_MUTATION}>
    {toggle => (
      <Query query={LOCAL_STATE_QUERY}>
        {({ data }) => (
          <Query query={CURRENT_USER_QUERY}>
            {({ data: { me }, error, loading }) => {
              if (loading || error || !me) return null;
              return (
                <CartStyles open={data.cartOpen}>
                  <header>
                    <CloseButton title="close" onClick={toggle}>
                      &times;
                    </CloseButton>

                    <Supreme>{me.name}'s Cart.</Supreme>
                    <p>
                      You have {me.cart.length} item{me.cart.length === 1 ? '' : 's'} in your cart.
                    </p>
                  </header>

                  <CartUl>
                    {me.cart.map(cartItem => <CartItem key={cartItem.id} cartItem={cartItem} />)}
                  </CartUl>
                  <footer>
                    <p>{formatMoney(calcTotalPrice(me.cart))}</p>
                    <TakeMyMoney>
                      <button>Checkout</button>
                    </TakeMyMoney>
                  </footer>
                </CartStyles>
              );
            }}
          </Query>
        )}
      </Query>
    )}
  </Mutation>
);

export default Cart;