[product-4] Implement Product API for front-end: Get the list of all products

src/main/java/com/zufar/onlinestore/product/converter/ProductInfoDtoConverter.java

@@ -3,6 +3,7 @@
 import com.zufar.onlinestore.product.dto.PriceDetailsDto;
 import com.zufar.onlinestore.product.dto.ProductInfoDto;
 import com.zufar.onlinestore.product.dto.ProductInfoFullDto;
+import com.zufar.onlinestore.product.dto.ProductInfoRequestResponseDto;
 import com.zufar.onlinestore.product.entity.ProductInfo;
 import org.springframework.stereotype.Component;
 
@@ -33,6 +34,18 @@ public ProductInfoFullDto convertToFullDto(final ProductInfo entity) {
         );
     }
 
+    public ProductInfoRequestResponseDto convertToRequestResponseDto(final ProductInfo entity) {
+        PriceDetailsDto priceDetails = new PriceDetailsDto(entity.getPrice(), entity.getCurrency());
+
+        return new ProductInfoRequestResponseDto(
+                entity.getId(),
+                entity.getDescription(),
+                entity.getName(),
+                priceDetails,
+                entity.getQuantity()
+        );
+    }
+
     public ProductInfo convertToEntity(final ProductInfoFullDto dto) {
         return new ProductInfo(
                 dto.id(),

src/main/java/com/zufar/onlinestore/product/dto/ProductInfoRequestResponseDto.java

@@ -0,0 +1,28 @@
+package com.zufar.onlinestore.product.dto;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Size;
+
+import java.util.UUID;
+
+public record ProductInfoRequestResponseDto(
+
+        @NotNull(message = "Id is the mandatory attribute")
+        UUID id,
+
+        @NotBlank(message = "Name is the mandatory attribute")
+        @Size(max = 100, message = "Name length must be less than 100 characters")
+        String name,
+
+        @NotBlank(message = "Description is the mandatory attribute")
+        @Size(max = 1000, message = "Description length must be less than 1000 characters")
+        String description,
+
+        @NotNull(message = "PriceDetails is the mandatory attribute")
+        PriceDetailsDto priceDetails,
+
+        @NotNull(message = "Quantity  is the mandatory attribute")
+        Integer quantity
+) {
+}

src/main/java/com/zufar/onlinestore/product/endpoint/ProductsEndpoint.java

@@ -2,19 +2,22 @@
 
 import com.zufar.onlinestore.product.converter.ProductInfoDtoConverter;
 import com.zufar.onlinestore.product.dto.ProductInfoDto;
+import com.zufar.onlinestore.product.dto.ProductInfoRequestResponseDto;
 import com.zufar.onlinestore.product.entity.ProductInfo;
 import com.zufar.onlinestore.product.repository.ProductInfoRepository;
 
+import com.zufar.onlinestore.product.service.ProductInfoService;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.http.ResponseEntity;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.bind.annotation.RestController;
 
-import java.util.Collection;
 import java.util.Optional;
+import java.util.UUID;
 
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -25,13 +28,15 @@
 @Validated
 @RequestMapping(value = "/api/products")
 public class ProductsEndpoint {
+
     private final ProductInfoRepository productInfoRepository;
     private final ProductInfoDtoConverter productInfoDtoConverter;
+    private final ProductInfoService productInfoService;
 
     @GetMapping("/{id}")
     public ResponseEntity<ProductInfoDto> getProductInfoById(@PathVariable("id") final String id) {
         log.info("Received request to get the ProductInfo with id - {}.", id);
-        Optional<ProductInfo> ProductInfo = productInfoRepository.findById(Integer.parseInt(id));
+        Optional<ProductInfo> ProductInfo = productInfoRepository.findById(UUID.fromString(id));
         if (ProductInfo.isEmpty()) {
             log.info("the ProductInfo with id - {} is absent.", id);
             return ResponseEntity.notFound()
@@ -44,21 +49,17 @@ public ResponseEntity<ProductInfoDto> getProductInfoById(@PathVariable("id") fin
     }
 
     @GetMapping
-    public ResponseEntity<Collection<ProductInfoDto>> getAllProducts() {
-        log.info("Received request to get all ProductInfos");
-        Collection<ProductInfo> productInfoCollection = productInfoRepository.findAll();
+    public ResponseEntity<Page<ProductInfoRequestResponseDto>> getAllProducts(Pageable pageable) {
+        log.info("Received request to get all ProductInfos (controller): {}", pageable);
+        Page<ProductInfoRequestResponseDto> productInfoCollection = productInfoService.getAllProducts(pageable);
         if (productInfoCollection.isEmpty()) {
             log.info("All ProductInfos are absent.");
             return ResponseEntity.notFound()
                     .build();
         }
-        Collection<ProductInfoDto> ProductInfos = productInfoCollection.stream()
-                .map(productInfoDtoConverter::convertToDto)
-                .toList();
-
-        log.info("All ProductInfos were retrieved - {}.", ProductInfos);
+        log.info("All ProductInfos were retrieved - {}.", productInfoCollection);
         return ResponseEntity.ok()
-                .body(ProductInfos);
+                .body(productInfoCollection);
     }
 
-}
+}

src/main/java/com/zufar/onlinestore/product/repository/ProductInfoRepository.java

@@ -1,10 +1,11 @@
 package com.zufar.onlinestore.product.repository;
 
 import com.zufar.onlinestore.product.entity.ProductInfo;
-
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
+import java.util.UUID;
+
 @Repository
-public interface ProductInfoRepository extends JpaRepository<ProductInfo, Integer> {
+public interface ProductInfoRepository extends JpaRepository<ProductInfo, UUID> {
 }

src/main/java/com/zufar/onlinestore/product/service/ProductInfoService.java

@@ -0,0 +1,10 @@
+package com.zufar.onlinestore.product.service;
+
+import com.zufar.onlinestore.product.dto.ProductInfoRequestResponseDto;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+
+public interface ProductInfoService {
+
+    Page<ProductInfoRequestResponseDto> getAllProducts(Pageable pageable);
+}

src/main/java/com/zufar/onlinestore/product/service/impl/ProductInfoServiceImpl.java

@@ -0,0 +1,27 @@
+package com.zufar.onlinestore.product.service.impl;
+
+import com.zufar.onlinestore.product.converter.ProductInfoDtoConverter;
+import com.zufar.onlinestore.product.dto.ProductInfoRequestResponseDto;
+import com.zufar.onlinestore.product.repository.ProductInfoRepository;
+import com.zufar.onlinestore.product.service.ProductInfoService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.stereotype.Service;
+
+@Slf4j
+@RequiredArgsConstructor
+@Service
+public class ProductInfoServiceImpl implements ProductInfoService {
+
+    private final ProductInfoRepository productInfoRepository;
+    private final ProductInfoDtoConverter productInfoDtoConverter;
+
+    @Override
+    public Page<ProductInfoRequestResponseDto> getAllProducts(Pageable pageable) {
+        log.info("Received request to get all ProductInfos (service)");
+        return productInfoRepository.findAll(pageable)
+                .map(productInfoDtoConverter::convertToRequestResponseDto);
+    }
+}