Четвертая лабораторная работа. Back-end всё.

backend/lab/src/main/java/com/example/lab/DataBase/Repositories/CountProductRepository.java

@@ -3,5 +3,5 @@ package com.example.lab.DataBase.Repositories;
 import com.example.lab.DataBase.Models.CountProduct;
 import org.springframework.data.jpa.repository.JpaRepository;
 
-public interface CountProductRepository extends JpaRepository<CountProduct, Integer> {
+public interface CountProductRepository extends JpaRepository<CountProduct, Long> {
 }

backend/lab/src/main/java/com/example/lab/DataBase/Services/CartService.java

@@ -65,7 +65,7 @@ public class CartService {
         var countProduct = countProductService.getCountProduct(productId, cartId);
         if(countProduct == null) countProduct = countProductService.addCountProduct(product, cart);
         countProduct.incrementAmount();
-        em.persist(cart);
+        cartRepository.save(cart);
         return product;
     }
 
@@ -76,7 +76,7 @@ public class CartService {
         var countProduct = countProductService.getCountProduct(productId, cartId);
         if(countProduct == null) return null;
         countProductService.deleteCountProduct(productId,cartId);
-        em.persist(cart);
+        cartRepository.save(cart);
         return product;
     }
 
@@ -86,8 +86,8 @@ public class CartService {
         Cart cart = getCart(cartId);
         var countProduct = countProductService.getCountProduct(productId, cartId);
         if(countProduct == null) return null;
-        countProduct.decrementAmount();
-        em.persist(countProduct);
+        var resProd = countProductService.decrementProduct(productId, cartId);
+        cartRepository.save(cart);
         return product;
     }
 }

backend/lab/src/main/java/com/example/lab/DataBase/Services/CountProductService.java

@@ -31,21 +31,30 @@ public class CountProductService {
 
     @Transactional
     public CountProduct getCountProduct(long productId, long cartId){
-        return countProductRepository.findById(productId, cartId).orElseThrow(() -> new CustomerNotFoundException(id));
+        var count = getAllCountProducts();
+        var countProduct = count.stream().filter(x -> x.getProduct().getId() == productId
+                && x.getCart().getId() == cartId ).findFirst();
+        if(countProduct.isEmpty()) return null;
+        else return countProduct.get();
+    }
+
+    @Transactional
+    public CountProduct getCountProductGeneral(long id){
+        return countProductRepository.findById(id).orElseThrow(() -> new CustomerNotFoundException(id));
     }
 
     @Transactional
     public CountProduct incrementProduct (long productId, long cartId){
         CountProduct countProduct = getCountProduct(productId, cartId);
         countProduct.incrementAmount();
-        return em.merge(countProduct);
+        return countProductRepository.save(countProduct);
     }
 
     @Transactional
     public CountProduct decrementProduct (long productId, long cartId){
         CountProduct countProduct = getCountProduct(productId, cartId);
         countProduct.decrementAmount();
-        return em.merge(countProduct);
+        return countProductRepository.save(countProduct);
     }
 
     @Transactional

backend/lab/src/main/java/com/example/lab/DataBase/Services/ProductService.java

@@ -1,6 +1,7 @@
 package com.example.lab.DataBase.Services;
 
 import com.example.lab.DataBase.Exceptions.ProductNotFoundException;
+import com.example.lab.DataBase.Models.Customer;
 import com.example.lab.DataBase.Models.ProductCategory;
 import com.example.lab.DataBase.Repositories.ProductRepository;
 import com.example.lab.DataBase.util.Validation.ValidatorUtil;
@@ -36,35 +37,26 @@ public class ProductService {
 
     @Transactional
     public List<Product> getAllProducts(){
-        return em.createQuery("from Product", Product.class).getResultList();
+        return productRepository.findAll();
     }
 
     @Transactional
     public Product updateProduct(Long id, String name, float price){
-        if (!StringUtils.hasText(name)){
-            throw new IllegalArgumentException("Product name cant be null");
-        }
-        else if(price <= 0){
-            throw new IllegalArgumentException("Product price cant be under 0");
-        }
         final Product product = getProduct(id);
         product.setName(name);
         product.setPrice(price);
-        return em.merge(product);
+        validatorUtil.validate(product);
+        return productRepository.save(product);
     }
 
     @Transactional
     public Product deleteProduct(Long id){
         final Product product = getProduct(id);
-        em.remove(product);
+        productRepository.delete(product);
         return product;
     }
     @Transactional
     public void deleteAllProducts(){
-        for (var product:
-             getAllProducts()) {
-            product.deleteThis();
-            em.remove(product);
-        }
+        productRepository.deleteAll();
     }
 }