add set meal or dish into shopping cart

sky-server/src/main/java/com/sky/controller/user/SetmealController.java

@@ -4,6 +4,7 @@ package com.sky.controller.user;
 import com.sky.entity.Setmeal;
 import com.sky.result.Result;
 import com.sky.service.SetmealService;
+import com.sky.service.ShoppingCartService;
 import com.sky.vo.DishItemVO;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;

sky-server/src/main/java/com/sky/controller/user/ShoppingCartController.java

@@ -0,0 +1,38 @@
+package com.sky.controller.user;
+
+import com.sky.dto.ShoppingCartDTO;
+import com.sky.result.Result;
+import com.sky.service.ShoppingCartService;
+import io.swagger.annotations.Api;
+import io.swagger.annotations.ApiOperation;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/user/shoppingCart")
+@Slf4j
+@Api(tags = "shoppingCart-controller")
+public class ShoppingCartController {
+
+    @Autowired
+    private ShoppingCartService shoppingCartService;
+
+    /**
+     * Adds an item into the shopping cart.
+     *
+     * @param shoppingCartDTO The data transfer object encapsulating the details of the item to be added.
+     *                       Includes 'dishId' for individual dishes, 'setmealId' for set meals, and 'dishFlavor' to specify dish flavors if applicable.
+     * @return A {@link Result} indicating the outcome of the operation, with a success code and no specific data content.
+     */
+    @PostMapping("/add")
+    @ApiOperation("add into shopping cart")
+    public Result add(@RequestBody ShoppingCartDTO shoppingCartDTO){
+        log.info("add into shopping cart, details: {}",shoppingCartDTO);
+        shoppingCartService.addIntoShoppingCart(shoppingCartDTO);
+        return Result.success();
+    }
+}

sky-server/src/main/java/com/sky/mapper/ShoppingCartMapper.java

@@ -0,0 +1,40 @@
+package com.sky.mapper;
+
+import com.sky.entity.ShoppingCart;
+import org.apache.ibatis.annotations.Insert;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Update;
+
+import java.util.List;
+
+@Mapper
+public interface ShoppingCartMapper {
+
+    /**
+     * Retrieves a list of shopping carts based on a given ShoppingCart instance.
+     * This method is typically used to fetch carts matching specific criteria
+     * encapsulated within the provided ShoppingCart object.
+     *
+     * @param shoppingCart An instance of ShoppingCart containing criteria
+     *                     for the search. The fields within this object may be
+     *                     used to filter or customize the retrieval of shopping carts.
+     * @return A list of ShoppingCart instances that match the criteria specified
+     * in the input ShoppingCart object. If no carts match, an empty list is returned.
+     */
+    List<ShoppingCart> list(ShoppingCart shoppingCart);
+
+    /**
+     * update the item number by item's id
+     * @param shoppingCart
+     */
+    @Update("update sky_take_out.shopping_cart set number = #{number} where id = #{id}")
+    void updateNumberById(ShoppingCart shoppingCart);
+
+    /**
+     * insert a new item into the shopping cart
+     * @param shoppingCart
+     */
+    @Insert("insert into sky_take_out.shopping_cart(name, image, user_id, dish_id, setmeal_id, dish_flavor, amount, create_time) " +
+            "values (#{name},#{image},#{userId},#{dishId},#{setmealId},#{dishFlavor},#{amount},#{createTime})")
+    void insert(ShoppingCart shoppingCart);
+}

sky-server/src/main/java/com/sky/service/ShoppingCartService.java

@@ -0,0 +1,16 @@
+package com.sky.service;
+
+import com.sky.dto.ShoppingCartDTO;
+import org.springframework.stereotype.Service;
+
+@Service
+public interface ShoppingCartService {
+
+    /**
+     * Adds a setmeal or dish to the shopping cart.
+     *
+     * @param shoppingCartDTO The data transfer object containing details of the item to be added to the shopping cart.
+     *                        It includes dishId, setmealId, and dishFlavor necessary for identifying and customizing the item.
+     */
+    void addIntoShoppingCart(ShoppingCartDTO shoppingCartDTO);
+}

sky-server/src/main/java/com/sky/service/impl/ShoppingCartServiceImpl.java

@@ -0,0 +1,74 @@
+package com.sky.service.impl;
+
+import com.sky.context.BaseContext;
+import com.sky.dto.ShoppingCartDTO;
+import com.sky.entity.Dish;
+import com.sky.entity.Setmeal;
+import com.sky.entity.ShoppingCart;
+import com.sky.mapper.DishMapper;
+import com.sky.mapper.SetmealMapper;
+import com.sky.mapper.ShoppingCartMapper;
+import com.sky.service.ShoppingCartService;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.BeanUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+@Service
+@Slf4j
+public class ShoppingCartServiceImpl implements ShoppingCartService {
+
+    @Autowired
+    private ShoppingCartMapper shoppingCartMapper;
+    @Autowired
+    private DishMapper dishMapper;
+    @Autowired
+    private SetmealMapper setmealMapper;
+
+    /**
+     * Adds an item to the shopping cart.
+     *
+     * @param shoppingCartDTO The data transfer object containing details of the item to be added.
+     *                       It includes the dish ID, setmeal ID, and dish flavor if applicable.
+     */
+    @Override
+    public void addIntoShoppingCart(ShoppingCartDTO shoppingCartDTO) {
+        //check the item if exists in the shopping cart
+        //fix properties
+        ShoppingCart shoppingCart = new ShoppingCart();
+        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
+        shoppingCart.setUserId(BaseContext.getCurrentId());
+
+        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
+
+        if (list != null && !list.isEmpty()){
+            //if exists
+            ShoppingCart cart = list.get(0);
+            cart.setNumber(cart.getNumber() +1);
+            shoppingCartMapper.updateNumberById(cart);
+        }else {
+            //if not,fix the rest properties: name, amount, image
+            //check the item to be added is of dish or set meal
+            Long dishId = shoppingCartDTO.getDishId();
+            if (dishId != null){
+                Dish dish = dishMapper.selectById(dishId);
+                shoppingCart.setName(dish.getName());
+                shoppingCart.setImage(dish.getImage());
+                shoppingCart.setAmount(dish.getPrice());
+            }else {
+                Long setmealId = shoppingCartDTO.getSetmealId();
+                Setmeal setmeal = setmealMapper.selectById(setmealId);
+                shoppingCart.setName(setmeal.getName());
+                shoppingCart.setImage(setmeal.getImage());
+                shoppingCart.setAmount(setmeal.getPrice());
+            }
+            shoppingCart.setNumber(1);
+            shoppingCart.setCreateTime(LocalDateTime.now());
+
+            shoppingCartMapper.insert(shoppingCart);
+        }
+    }
+}

sky-server/src/main/resources/mapper/ShoppingCartMapper.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE mapper
+        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.sky.mapper.ShoppingCartMapper">
+
+    <select id="list" resultType="com.sky.entity.ShoppingCart">
+        select * from sky_take_out.shopping_cart
+        <where>
+            <if test="userId != null">
+                and user_id = #{userId}
+            </if>
+            <if test="setmealId != null">
+                and setmeal_id = #{setmealId}
+            </if>
+            <if test="dishId!= null">
+                and dish_id = #{dishId}
+            </if>
+            <if test="dishFlavor != null">
+                and dish_flavor = #{dishFlavor}
+            </if>
+        </where>
+    </select>
+</mapper>