Cmarket Hooks

App.js

function App() {

  const [items, setItems] = useState(initialState.items);
  const [cartItems, setCartItems] = useState(initialState.cartItems);
  const control = (e) => {
    let isinclude = false
    let cartItems_list = cartItems
    cartItems_list.forEach((el) => {
      if(el.itemId === e.itemId){
        el.quantity = el.quantity+1
        setCartItems(cartItems_list)
        isinclude = true
      }
    })
    if (isinclude === false){
      setCartItems([...cartItems, e])
    }
    console.log(e)
    console.log(cartItems)
  }
  const delete_item = (deleteid) => {
    setCartItems(cartItems.filter((el) => el.itemId !== deleteid))
  }
  const change = (item) => {
    setCartItems(item)
  }
  return (
    <Router>
      <Nav cartItems = {cartItems}/>
      <Switch>
        <Route exact={true} path="/">
          <ItemListContainer items={items} control={control}/>
        </Route>
        <Route path="/shoppingcart">
          <ShoppingCart cartItems={cartItems} items={items} delete_item={delete_item} change={change}/>
        </Route>
      </Switch>
    </Router>
  );
}

export default App;

Nav.js

function Nav({cartItems}) {

  return (
    <div id="nav-body">
      <span id="title">
        <img id="logo" src="../logo.png" alt="logo" />
        <span id="name">CMarket</span>
      </span>
      <div id="menu">
        <Link to="/">상품리스트</Link>
        <Link to="/shoppingcart">
          장바구니<span id="nav-item-counter">{cartItems.length}</span>
        </Link>
      </div>
    </div>
  );
}

export default Nav;

ShoppingCart.js

export default function ShoppingCart({ items, cartItems, delete_item, change }) {
  const [checkedItems, setCheckedItems] = useState(cartItems.map((el) => el.itemId))

  const handleCheckChange = (checked, id) => {
    if (checked) {
      setCheckedItems([...checkedItems, id]);
    }
    else {
      setCheckedItems(checkedItems.filter((el) => el !== id));
    }
  };

  const handleAllCheck = (checked) => {
    if (checked) {
      setCheckedItems(cartItems.map((el) => el.itemId))
    }
    else {
      setCheckedItems([]);
    }
  };

  const handleQuantityChange = (quantity, itemId) => {
    change((cartItems.map((el) => {
      if(el.itemId === itemId){
        return {...el, "quantity": quantity}
      }
      else{
        return el
      }
    })))
  }

  const handleDelete = (itemId) => {
    setCheckedItems(checkedItems.filter((el) => el !== itemId))
    delete_item(itemId)
  }

  const getTotal = () => {
    let cartIdArr = cartItems.map((el) => el.itemId)
    let total = {
      price: 0,
      quantity: 0,
    }
    for (let i = 0; i < cartIdArr.length; i++) {
      if (checkedItems.indexOf(cartIdArr[i]) > -1) {
        let quantity = cartItems[i].quantity
        let price = items.filter((el) => el.id === cartItems[i].itemId)[0].price

        total.price = total.price + quantity * price
        total.quantity = total.quantity + quantity
      }
    }
    return total
  }

  const renderItems = items.filter((el) => cartItems.map((el) => el.itemId).indexOf(el.id) > -1)
  const total = getTotal()

  return (
    <div id="item-list-container">
      <div id="item-list-body">
        <div id="item-list-title">장바구니</div>
        <span id="shopping-cart-select-all">
          <input
            type="checkbox"
            checked={
              checkedItems.length === cartItems.length ? true : false
            }
            onChange={(e) => handleAllCheck(e.target.checked)} >
          </input>
          <label >전체선택</label>
        </span>
        <div id="shopping-cart-container">
          {!cartItems.length ? (
            <div id="item-list-text">
              장바구니에 아이템이 없습니다.
            </div>
          ) : (
              <div id="cart-item-list">
                {renderItems.map((item, idx) => {
                  const quantity = cartItems.filter(el => el.itemId === item.id)[0].quantity
                  return <CartItem
                    key={idx}
                    handleCheckChange={handleCheckChange}
                    handleQuantityChange={handleQuantityChange}
                    handleDelete={handleDelete}
                    item={item}
                    checkedItems={checkedItems}
                    quantity={quantity}
                  />
                })}
              </div>
            )}
          <OrderSummary total={total.price} totalQty={total.quantity} />
        </div>
      </div >
    </div>
  )
}

ItemListContainer.js

function ItemListContainer({ items, control }) {
  const handleClick = (e, id) => {
    let item = {"itemId": id, "quantity": 1}
    control(item)
  }
  return (
    <div id="item-list-container">
      <div id="item-list-body">
        <div id="item-list-title">쓸모없는 선물 모음</div>
        {items.map((item, idx) => <Item item={item} key={idx} handleClick={handleClick} />)}
      </div>
    </div>
  );
}