Merge pull request #24 from Team-A-Mango/23-buy-product-function

상품 구매 기능

src/main/java/com/mango/amango/domain/order/Order.java → src/main/java/com/mango/amango/domain/order/entity/Order.java

@@ -1,4 +1,4 @@
-package com.mango.amango.domain.order;
+package com.mango.amango.domain.order.entity;
 
 import com.mango.amango.domain.product.entity.Product;
 import com.mango.amango.domain.user.entity.User;

src/main/java/com/mango/amango/domain/order/repository/OrderRepository.java

@@ -0,0 +1,8 @@
+package com.mango.amango.domain.order.repository;
+
+import com.mango.amango.domain.order.entity.Order;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface OrderRepository extends JpaRepository<Order, Long> {
+    boolean existsByProductId(Long productId);
+}

src/main/java/com/mango/amango/domain/order/util/OrderConverter.java

@@ -0,0 +1,15 @@
+package com.mango.amango.domain.order.util;
+
+import com.mango.amango.domain.order.entity.Order;
+import com.mango.amango.domain.product.entity.Product;
+import com.mango.amango.domain.user.entity.User;
+
+public abstract class OrderConverter {
+
+    public static Order toEntity (Product product, User user) {
+        return Order.builder()
+                .product(product)
+                .user(user)
+                .build();
+    }
+}

src/main/java/com/mango/amango/domain/product/exception/ProductAlreadyTradedException.java

@@ -0,0 +1,10 @@
+package com.mango.amango.domain.product.exception;
+
+import com.mango.amango.global.exception.CustomErrorCode;
+import com.mango.amango.global.exception.CustomException;
+
+public class ProductAlreadyTradedException extends CustomException {
+    public ProductAlreadyTradedException() {
+        super(CustomErrorCode.PRODUCT_ALREADY_TRADED);
+    }
+}

src/main/java/com/mango/amango/domain/product/presentation/ProductController.java

@@ -3,6 +3,7 @@
 import com.mango.amango.domain.product.presentation.dto.request.CreateProductReq;
 import com.mango.amango.domain.product.presentation.dto.response.GetProductRes;
 import com.mango.amango.domain.product.presentation.dto.response.FindAllProductRes;
+import com.mango.amango.domain.product.service.BuyProductService;
 import com.mango.amango.domain.product.service.CreateProductService;
 import com.mango.amango.domain.product.service.GetProductService;
 import com.mango.amango.domain.product.service.FindAllProductService;
@@ -22,9 +23,10 @@
 @RequestMapping("/product")
 public class ProductController {
 
-    public final CreateProductService createProductService;
-    public final GetProductService getProductService;
-    public final FindAllProductService findAllProductService;
+    private final CreateProductService createProductService;
+    private final GetProductService getProductService;
+    private final FindAllProductService findAllProductService;
+    private final BuyProductService buyProductService;
 
     @PostMapping
     public ResponseEntity<Void> createProduct(
@@ -40,11 +42,17 @@ public ResponseEntity<GetProductRes> getProduct(@PathVariable Long productId) {
         GetProductRes res = getProductService.execute(productId);
         return ResponseEntity.ok(res);
     }
+
     @GetMapping
     public ResponseEntity<List<FindAllProductRes>> findAllProducts() {
         List<FindAllProductRes> res = findAllProductService.execute();
         return ResponseEntity.ok(res);
 
     }
 
+    @PostMapping("/{productId}")
+    public ResponseEntity<Void> orderProduct(@PathVariable Long productId) {
+        buyProductService.execute(productId);
+        return ResponseEntity.status(CREATED).build();
+    }
 }

src/main/java/com/mango/amango/domain/product/service/BuyProductService.java

@@ -0,0 +1,5 @@
+package com.mango.amango.domain.product.service;
+
+public interface BuyProductService {
+    void execute(Long productId);
+}

src/main/java/com/mango/amango/domain/product/service/impl/BuyProductServiceImpl.java

@@ -0,0 +1,39 @@
+package com.mango.amango.domain.product.service.impl;
+
+import com.mango.amango.domain.order.entity.Order;
+import com.mango.amango.domain.order.repository.OrderRepository;
+import com.mango.amango.domain.order.util.OrderConverter;
+import com.mango.amango.domain.product.entity.Product;
+import com.mango.amango.domain.product.exception.NotFoundProductException;
+import com.mango.amango.domain.product.exception.ProductAlreadyTradedException;
+import com.mango.amango.domain.product.repository.ProductRepository;
+import com.mango.amango.domain.product.service.BuyProductService;
+import com.mango.amango.domain.user.entity.User;
+import com.mango.amango.domain.user.service.UserService;
+import jakarta.transaction.Transactional;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class BuyProductServiceImpl implements BuyProductService {
+
+    private final ProductRepository productRepository;
+    private final UserService userService;
+    private final OrderRepository orderRepository;
+
+    public void execute(Long productId) {
+        User user = userService.getCurrentUser();
+
+        Product product = productRepository.findById(productId)
+                .orElseThrow(NotFoundProductException::new);
+
+        if (orderRepository.existsByProductId(product.getId())) {
+            throw new ProductAlreadyTradedException();
+        } else {
+            Order order = OrderConverter.toEntity(product, user);
+            orderRepository.save(order);
+        }
+    }
+}

src/main/java/com/mango/amango/global/exception/CustomErrorCode.java

@@ -17,7 +17,9 @@ public enum CustomErrorCode {
     FILE_PROCESSING_ERROR(HttpStatus.BAD_REQUEST, "처리 할 수 없는 파일입니다."),
     MAIL_DELIVERY_FAILED(HttpStatus.INTERNAL_SERVER_ERROR, "매일 전송을 실패하였습니다."),
 
-    NOT_FOUND_PRODUCT(HttpStatus.NOT_FOUND,"해당 상품을 찾을 수 없습니다.")
+    NOT_FOUND_PRODUCT(HttpStatus.NOT_FOUND,"해당 상품을 찾을 수 없습니다."),
+
+    PRODUCT_ALREADY_TRADED(HttpStatus.BAD_REQUEST, "이미 거래된 상품입니다.")
     ;
 
     private final HttpStatus statusCode;

src/main/java/com/mango/amango/global/security/configs/SecurityConfig.java

@@ -36,6 +36,7 @@ public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Excepti
                         .requestMatchers(POST, "/email").permitAll()
                         .requestMatchers(GET, "/product/**").permitAll()
                         .requestMatchers(POST, "/product").hasAuthority(USER.getKey())
+                        .requestMatchers(POST, "/product/**").hasAuthority(USER.getKey())
                         .requestMatchers(POST, "/inquiry/**").hasAuthority(USER.getKey())
                         .anyRequest().authenticated()
                 )