[React]Cmarket Redux

목차

• Action 생성
• Reducer 생성
• dispatch 생성

 

 

 

📌 My Agora states server

 

 

📖 학습 목표

 

pass한 순서대로 문제 해결

 

 

 

Action 생성

 

actions - index.js

 

// action types
export const ADD_TO_CART = "ADD_TO_CART";
export const REMOVE_FROM_CART = "REMOVE_FROM_CART";
export const SET_QUANTITY = "SET_QUANTITY";
export const NOTIFY = "NOTIFY";
export const ENQUEUE_NOTIFICATION = "ENQUEUE_NOTIFICATION";
export const DEQUEUE_NOTIFICATION = "DEQUEUE_NOTIFICATION";

// actions creator functions
export const addToCart = (itemId) => {
  return {
    type: ADD_TO_CART,
    payload: {
      quantity: 1,
      itemId
    }
  }
}

export const removeFromCart = (itemId) => {
  return {
    type: REMOVE_FROM_CART,
    payload: {
      itemId
    }
  }
}

export const setQuantity = (itemId, quantity) => {
  return {
    type: SET_QUANTITY,
    payload: {
      quantity,
      itemId
    }
  }
}

export const notify = (message, dismissTime = 5000) => dispatch => {
  const uuid = Math.random()
  dispatch(enqueueNotification(message, dismissTime, uuid))
  setTimeout(() => {
    dispatch(dequeueNotification())
  }, dismissTime)
}

export const enqueueNotification = (message, dismissTime, uuid) => {
  return {
    type: ENQUEUE_NOTIFICATION,
    payload: {
      message,
      dismissTime,
      uuid
    }
  }
}

export const dequeueNotification = () => {
  return {
    type: DEQUEUE_NOTIFICATION
  }
}

 

 

Reducer 생성

 

reducers - itemReducer.js

 

import { REMOVE_FROM_CART, ADD_TO_CART, SET_QUANTITY } from "../actions/index";
import { initialState } from "./initialState";

const itemReducer = (state = initialState, action) => {

  switch (action.type) {
    case ADD_TO_CART:
      //TODO
      return Object.assign({}, state, {
        cartItems: [...state.cartItems, action.payload]
      })

      break;
    case REMOVE_FROM_CART:
      //TODO
      let currentItem = state.cartItems.filter((el) => el.itemId !== action.payload.itemId)
      return Object.assign({}, state, {
        cartItems: currentItem
      })

      break;
      case SET_QUANTITY:
        let idx = state.cartItems.findIndex(el => el.itemId === action.payload.itemId)
        return {
          ...state,
          cartItems: [...state.cartItems.slice(0, idx), action.payload, ...state.cartItems.slice(idx + 1)]
        }
      break;
    default:
      return state;
  }
}

export default itemReducer;

 

 

dispatch 생성

 

pages - itemListContainer.js

 

import React from 'react';
import { addToCart, notify } from '../actions/index';
import { useSelector, useDispatch } from 'react-redux';
import Item from '../components/Item';

function ItemListContainer() {
  const state = useSelector(state => state.itemReducer);
  const { items, cartItems } = state;
  const dispatch = useDispatch();

  const handleClick = (item) => {
    if (!cartItems.map((el) => el.itemId).includes(item.id)) {
      //TODO: dispatch 함수를 호출하여 아이템 추가에 대한 액션을 전달하세요.
      dispatch(addToCart(item.id))
      dispatch(notify(`장바구니에 ${item.name}이(가) 추가되었습니다.`))
    }
    else {
      dispatch(notify('이미 추가된 상품입니다.'))
    }
  }

  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(item)
        }} />)}
      </div>
    </div>
  );
}



export default ItemListContainer;

 

pages - ShoppingCart.js

 

...
  const handleQuantityChange = (quantity, itemId) => {
    //TODO: dispatch 함수를 호출하여 액션을 전달하세요.
    dispatch(setQuantity(itemId,quantity))
  }

  const handleDelete = (itemId) => {
    setCheckedItems(checkedItems.filter((el) => el !== itemId))
    dispatch(removeFromCart(itemId))
    //TODO: dispatch 함수를 호출하여 액션을 전달하세요.
    dispatch(removeFromCart(itemId))
  }
  ...