create POST carts/{username}/items

kbazaar/src/main/java/com/kampus/kbazaar/cart/ApplyCodeResponse.java

@@ -2,7 +2,6 @@
 
 import java.math.BigDecimal;
 import java.util.List;
-
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;

kbazaar/src/main/java/com/kampus/kbazaar/cart/Cart.java

@@ -1,7 +1,5 @@
 package com.kampus.kbazaar.cart;
 
-import com.kampus.kbazaar.product.Product;
-import com.kampus.kbazaar.shopper.Shopper;
 import jakarta.persistence.*;
 import lombok.AllArgsConstructor;
 import lombok.Data;
@@ -18,11 +16,9 @@ public class Cart {
     @Column(name = "id")
     private Integer id;
 
-    @OneToOne
-    @JoinColumn(name = "shopper_id", referencedColumnName = "id")
-    private Shopper shopper;
+    @Column(name = "shopperid")
+    private Long shopperId;
 
-    @OneToMany
-    @JoinColumn(name = "product_id", referencedColumnName = "id")
-    private Product[] products;
+    @Column(name = "quantity")
+    private int quantity;
 }

kbazaar/src/main/java/com/kampus/kbazaar/cart/CartController.java

@@ -1,6 +1,7 @@
 package com.kampus.kbazaar.cart;
 
 import com.kampus.kbazaar.promotion.ApplyCodeRequest;
+import io.swagger.v3.oas.annotations.Operation;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
@@ -25,4 +26,15 @@ public ResponseEntity<ApplyCodeResponse> applyCode(
             @PathVariable("username") String username, @RequestBody ApplyCodeRequest request) {
         return new ResponseEntity<>(cartService.applyCode(username, request), HttpStatus.OK);
     }
+
+    @Operation(summary = "add item to carts")
+    @PostMapping("/carts/{username}/items")
+    public ResponseEntity<CreateCartResponse> createCart(
+            @PathVariable(name = "username") String userName,
+            @RequestBody CartRequest cartRequest) {
+
+        CreateCartResponse cartResponse = cartService.createCart(userName, cartRequest);
+
+        return ResponseEntity.status(HttpStatus.CREATED).body(cartResponse);
+    }
 }

kbazaar/src/main/java/com/kampus/kbazaar/cart/CartDetail.java

@@ -1,12 +1,11 @@
 package com.kampus.kbazaar.cart;
 
 import jakarta.persistence.*;
+import java.math.BigDecimal;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
-import java.math.BigDecimal;
-
 @Entity(name = "CartDetail")
 @Data
 @AllArgsConstructor
@@ -35,5 +34,4 @@ public class CartDetail {
 
     @Column(name = "finalPrice")
     private BigDecimal finalPrice;
-
 }

kbazaar/src/main/java/com/kampus/kbazaar/cart/CartRepository.java

@@ -0,0 +1,26 @@
+package com.kampus.kbazaar.cart;
+
+import java.util.List;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface CartRepository extends JpaRepository<Cart, Long> {
+
+    String sqlCart =
+            "SELECT "
+                    + "c.id AS cart_id, "
+                    + "p.name AS product_name, "
+                    + "s.username AS user_name "
+                    + "FROM "
+                    + "cart c "
+                    + "INNER JOIN product p ON c.productid = p.id "
+                    + "INNER JOIN shopper s ON c.shopperid = s.id "
+                    + "WHERE "
+                    + "c.shopperid = :shopperId";
+
+    @Query(value = sqlCart, nativeQuery = true)
+    public List<Object[]> findCartDetailById(@Param("shopperId") Long shopperId);
+}

kbazaar/src/main/java/com/kampus/kbazaar/cart/CartRequest.java

@@ -0,0 +1,13 @@
+package com.kampus.kbazaar.cart;
+
+import jakarta.validation.constraints.Min;
+import jakarta.validation.constraints.NotNull;
+import lombok.Data;
+
+@Data
+public class CartRequest {
+    @NotNull private String sku;
+
+    @Min(value = 1, message = "QTY must be greater than or equal to 0")
+    private Integer qty;
+}

kbazaar/src/main/java/com/kampus/kbazaar/cart/CartService.java

@@ -16,10 +16,15 @@ public class CartService {
     private final PromotionRepository promotionRepository;
     private final ShopperRepository shopperRepository;
 
+    private final CartRepository cartRepository;
+
     public CartService(
-            PromotionRepository promotionRepository, ShopperRepository shopperRepository) {
+            PromotionRepository promotionRepository,
+            ShopperRepository shopperRepository,
+            CartRepository cartRepository) {
         this.promotionRepository = promotionRepository;
         this.shopperRepository = shopperRepository;
+        this.cartRepository = cartRepository;
     }
 
     // story_6
@@ -47,4 +52,21 @@ public ApplyCodeResponse applyCode(String username, ApplyCodeRequest request) {
             throw new BadRequestException("Username not found");
         }
     }
+
+    public CreateCartResponse createCart(String userName, CartRequest cartRequest) {
+        Optional<Shopper> shopper = shopperRepository.findByUsername(userName);
+        if (shopper.isPresent()) {
+
+            CreateCartResponse response = new CreateCartResponse();
+            Cart cart = new Cart();
+            cart.setShopperId(shopper.get().getId());
+            cart.setQuantity(cartRequest.getQty());
+            cartRepository.save(cart);
+
+            response.setCartId(cart.getId());
+            return response;
+        } else {
+            throw new BadRequestException("Create cart failed");
+        }
+    }
 }

kbazaar/src/main/java/com/kampus/kbazaar/cart/CreateCartResponse.java

@@ -0,0 +1,8 @@
+package com.kampus.kbazaar.cart;
+
+import lombok.Data;
+
+@Data
+public class CreateCartResponse {
+    private Integer cartId;
+}