[Feat] AI추천 상품조회

src/main/java/ttakkeun/ttakkeun_server/controller/ProductController.java

@@ -0,0 +1,42 @@
+package ttakkeun.ttakkeun_server.controller;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+import ttakkeun.ttakkeun_server.dto.ProductApiResponseDTO;
+import ttakkeun.ttakkeun_server.dto.ProductDTO;
+import ttakkeun.ttakkeun_server.service.ProductService;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/product")
+@RequiredArgsConstructor
+public class ProductController {
+    private final ProductService productService;
+
+    //ai 추천 제품
+    @GetMapping("/ai")
+    public ResponseEntity<ProductApiResponseDTO> getAiProducts() {
+        try {
+            List<ProductDTO> products = productService.getResultProducts();
+            ProductApiResponseDTO response = ProductApiResponseDTO.builder()
+                    .isSuccess(true)
+                    .code(200)
+                    .message("성공")
+                    .result(products)
+                    .build();
+
+            return ResponseEntity.ok(response);
+        } catch (Exception e) {
+            ProductApiResponseDTO response = ProductApiResponseDTO.builder()
+                    .isSuccess(false)
+                    .code(500)
+                    .message("에러: " + e.getMessage())
+                    .build();
+
+            return ResponseEntity.status(500).body(response);
+        }
+    }
+}
+

src/main/java/ttakkeun/ttakkeun_server/converter/ProductConverter.java

@@ -0,0 +1,36 @@
+package ttakkeun.ttakkeun_server.converter;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import ttakkeun.ttakkeun_server.dto.ProductDTO;
+import ttakkeun.ttakkeun_server.entity.Product;
+import ttakkeun.ttakkeun_server.service.LikeService;
+
+@Component
+@RequiredArgsConstructor
+public class ProductConverter {
+    private final LikeService likeService;
+
+    //Product를 ProductDTO로 convert
+    public ProductDTO toDTO(Product product) {
+        Long productId = product.getProductId();
+        //임시 멤버값
+        Integer totalLikes = likeService.getTotalLikes(productId);
+        boolean isLike = likeService.getLikeStatus(productId);
+
+        return ProductDTO.builder()
+                .product_id(product.getProductId())
+                .title(product.getProductTitle())
+                .image(product.getProductImage())
+                .price(product.getLprice())
+                .brand(product.getBrand())
+                .link(product.getProductLink())
+                .category1(product.getCategory1())
+                .category2(product.getCategory2())
+                .category3(product.getCategory3())
+                .category4(product.getCategory4())
+                .total_likes(totalLikes)
+                .isLike(isLike)
+                .build();
+    }
+}

src/main/java/ttakkeun/ttakkeun_server/dto/ProductApiResponseDTO.java

@@ -0,0 +1,15 @@
+package ttakkeun.ttakkeun_server.dto;
+
+import lombok.Builder;
+import lombok.Getter;
+
+import java.util.List;
+
+@Getter
+@Builder
+public class ProductApiResponseDTO {
+    private Boolean isSuccess;
+    private int code;
+    private String message;
+    private List<ProductDTO> result;
+}

src/main/java/ttakkeun/ttakkeun_server/dto/ProductDTO.java

@@ -0,0 +1,21 @@
+package ttakkeun.ttakkeun_server.dto;
+
+import lombok.Builder;
+import lombok.Getter;
+
+@Getter
+@Builder
+public class ProductDTO {
+    private Long product_id;
+    private String title;
+    private String image;
+    private Integer price;
+    private String brand;
+    private String link;
+    private String category1;
+    private String category2;
+    private String category3;
+    private String category4;
+    private Integer total_likes;
+    private Boolean isLike;
+}

src/main/java/ttakkeun/ttakkeun_server/repository/LikeRepository.java

@@ -0,0 +1,29 @@
+package ttakkeun.ttakkeun_server.repository;
+
+import jakarta.persistence.EntityManager;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Repository;
+import ttakkeun.ttakkeun_server.entity.Member;
+import ttakkeun.ttakkeun_server.entity.Product;
+
+import java.util.List;
+
+@Repository
+@RequiredArgsConstructor
+public class LikeRepository {
+    private final EntityManager em;
+
+    //멤버와 연관된 제품들 반환(특정 사용자의 좋아요 목록)
+    public List<Product> findProductsByMemberId(Long memberId) {
+        return em.createQuery("SELECT lp.product FROM LikeProduct lp WHERE lp.member.memberId = :memberId", Product.class)
+                .setParameter("memberId", memberId)
+                .getResultList();
+    }
+
+    //제품과 연관된 멤버들 반환(특정 제품에 좋아요한 사용자 목록)
+    public List<Member> findMembersByProductId(Long productId) {
+        return em.createQuery("SELECT lp.member FROM LikeProduct lp WHERE lp.product.productId = :productId", Member.class)
+                .setParameter("productId", productId)
+                .getResultList();
+    }
+}

src/main/java/ttakkeun/ttakkeun_server/repository/ProductRepository.java

@@ -0,0 +1,28 @@
+package ttakkeun.ttakkeun_server.repository;
+
+import jakarta.persistence.EntityManager;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Repository;
+import ttakkeun.ttakkeun_server.entity.Product;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+@Repository
+@RequiredArgsConstructor
+public class ProductRepository {
+    private final EntityManager em;
+
+    //제품id로 제품 불러오기
+    public Product findById(Long id) {
+        return em.find(Product.class, id);
+    }
+
+    //진단결과 id를 이용해 진단제품 불러오기
+    public List<Product> findByResultId(Long resultId) {
+        return em.createQuery("SELECT p FROM Product p WHERE p.result.resultId = :resultId", Product.class)
+                .setParameter("resultId", resultId)
+                .setMaxResults(5)
+                .getResultList();
+    }
+}

src/main/java/ttakkeun/ttakkeun_server/repository/ResultRepository.java

@@ -0,0 +1,19 @@
+package ttakkeun.ttakkeun_server.repository;
+
+import jakarta.persistence.EntityManager;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Repository;
+
+@Repository
+@RequiredArgsConstructor
+public class ResultRepository {
+
+    private final EntityManager em;
+
+    //가장 최근 진단결과 id불러오기
+    public Long findLatestResultId() {
+        return em.createQuery("SELECT r.id FROM Result r ORDER BY createdAt desc", Long.class)
+                .setMaxResults(1)
+                .getSingleResult();
+    }
+}

src/main/java/ttakkeun/ttakkeun_server/service/LikeService.java

@@ -0,0 +1,33 @@
+package ttakkeun.ttakkeun_server.service;
+
+import jakarta.transaction.Transactional;
+import lombok.RequiredArgsConstructor;
+import org.springframework.data.relational.core.sql.Like;
+import org.springframework.stereotype.Service;
+import ttakkeun.ttakkeun_server.entity.Product;
+import ttakkeun.ttakkeun_server.repository.LikeRepository;
+import ttakkeun.ttakkeun_server.repository.ProductRepository;
+
+import java.util.List;
+
+@Service
+@Transactional
+@RequiredArgsConstructor
+public class LikeService {
+    private final LikeRepository likeRepository;
+    private final ProductRepository productRepository;
+
+    //제품의 좋아요 수 반환
+    public int getTotalLikes(Long productId) {
+        return likeRepository.findMembersByProductId(productId).size();
+    }
+
+    //사용자의 좋아요 판단
+    public Boolean getLikeStatus(Long productId) {
+
+        //임시 멤버값
+        Long memberId = 526L;
+        Product targetProduct = productRepository.findById(productId);
+        return likeRepository.findProductsByMemberId(memberId).contains(targetProduct);
+    }
+}

src/main/java/ttakkeun/ttakkeun_server/service/MemberService.java

@@ -4,10 +4,19 @@
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Service;
+import ttakkeun.ttakkeun_server.entity.Member;
+import ttakkeun.ttakkeun_server.repository.MemberRepository;
+
+import java.util.Optional;
 
 @Slf4j
 @Service
 @Transactional
 @RequiredArgsConstructor
 public class MemberService {
+    private final MemberRepository memberRepository;
+
+    public Optional<Member> findMemberById(Long id) {
+        return memberRepository.findById(id);
+    }
 }

src/main/java/ttakkeun/ttakkeun_server/service/ProductService.java

@@ -0,0 +1,31 @@
+package ttakkeun.ttakkeun_server.service;
+
+import jakarta.transaction.Transactional;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import ttakkeun.ttakkeun_server.converter.ProductConverter;
+import ttakkeun.ttakkeun_server.dto.ProductDTO;
+import ttakkeun.ttakkeun_server.entity.Product;
+import ttakkeun.ttakkeun_server.repository.ProductRepository;
+import ttakkeun.ttakkeun_server.repository.ResultRepository;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+@Service
+@Transactional
+@RequiredArgsConstructor
+public class ProductService {
+    private final ProductRepository productRepository;
+    private final ResultRepository resultRepository;
+    private final LikeService likeService;
+    private final ProductConverter productConverter;
+
+    //진단의 ai추천제품
+    public List<ProductDTO> getResultProducts() {
+        Long latestResultId = resultRepository.findLatestResultId();
+        List<Product> products = productRepository.findByResultId(latestResultId);
+
+        return products.stream().map(productConverter::toDTO).collect(Collectors.toList());
+    }
+}