feat: 상품 이름으로 검색하여 페이징 처리하는 API 구현

src/main/java/cholog/wiseshop/api/campaign/controller/CampaignController.java

@@ -16,6 +16,7 @@
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 
 @RequestMapping("/api/v1/campaigns")
@@ -30,7 +31,7 @@ public CampaignController(CampaignService campaignService) {
 
     @PostMapping
     public ResponseEntity<CreateCampaignResponse> createCampaigns(@Auth Member member,
-        @RequestBody CreateCampaignRequest request) {
+                                                                  @RequestBody CreateCampaignRequest request) {
         var response = campaignService.createCampaign(request, member, LocalDateTime.now());
         return ResponseEntity.status(HttpStatus.CREATED).body(response);
     }
@@ -52,4 +53,12 @@ public ResponseEntity<List<MemberCampaignResponse>> readMemberCampaign(@Auth Mem
         List<MemberCampaignResponse> response = campaignService.readMemberCampaign(member);
         return ResponseEntity.ok(response);
     }
+
+    @GetMapping("/search")
+    public ResponseEntity<List<ReadCampaignResponse>> searchCampaigns(@RequestParam String keyword,
+                                                                      @RequestParam int page,
+                                                                      @RequestParam int size) {
+        List<ReadCampaignResponse> response = campaignService.searchByProductName(keyword, page, size);
+        return ResponseEntity.ok(response);
+    }
 }

src/main/java/cholog/wiseshop/api/campaign/service/CampaignService.java

@@ -18,6 +18,10 @@
 import cholog.wiseshop.exception.WiseShopException;
 import java.time.LocalDateTime;
 import java.util.List;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.Sort;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -127,4 +131,25 @@ public List<MemberCampaignResponse> readMemberCampaign(Member member) {
                 return MemberCampaignResponse.of(campaign, products.getFirst());
             }).toList();
     }
+
+    public List<ReadCampaignResponse> searchByProductName(String keyword, int page, int size) {
+        keyword = keyword.trim();
+        Pageable pageable = PageRequest.of(page, size, Sort.by("id").ascending());
+        Page<Product> pages = productRepository.findByNameContaining(keyword, pageable);
+        return pages.getContent().stream()
+            .map(product -> {
+                Campaign campaign = product.getCampaign();
+                return new ReadCampaignResponse(
+                    campaign.getId(),
+                    campaign.getStartDate().toString(),
+                    campaign.getEndDate().toString(),
+                    campaign.getGoalQuantity(),
+                    campaign.getSoldQuantity(),
+                    product.getStock().getTotalQuantity(),
+                    campaign.getState(),
+                    new ProductResponse(product),
+                    campaign.getMember().orElse(Member.createEmpty()).getId()
+                );
+            }).toList();
+    }
 }

src/main/java/cholog/wiseshop/db/product/ProductRepository.java

@@ -2,6 +2,8 @@
 
 import cholog.wiseshop.db.campaign.Campaign;
 import java.util.List;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.query.Param;
@@ -14,4 +16,8 @@ public interface ProductRepository extends JpaRepository<Product, Long> {
     List<Product> findAllByCampaign(Campaign campaign);
 
     List<Product> findAllByOwnerId(Long memberId);
+
+    @Query(value = "SELECT p FROM Product p JOIN FETCH p.stock JOIN FETCH p.campaign WHERE p.name LIKE %:keyword%",
+        countQuery = "SELECT COUNT(p) FROM Product p WHERE p.name LIKE %:keyword%")
+    Page<Product> findByNameContaining(String keyword, Pageable pageable);
 }

src/test/java/cholog/wiseshop/domain/CampaignServiceTest.java

@@ -311,4 +311,31 @@ class 캠페인을_조회한다 {
             assertThat(response).hasSize(2);
         }
     }
+
+    @Nested
+    class 캠페인을_상품이름으로_검색한다 {
+
+        @Test
+        void 캠페인_상품이름으로_검색() {
+            // given
+            Member member = memberRepository.save(MemberFixture.최준호());
+            Campaign campaign = campaignRepository.save(CampaignFixture.진행중인_보약_캠페인(member));
+            Stock stock = new Stock(20);
+            stockRepository.save(stock);
+            productRepository.save(
+                ProductFixture.재고가_설정된_이름있는_캠페인의_보약(campaign, stock, member, "아주 좋은 보약"));
+
+            Campaign campaign2 = campaignRepository.save(CampaignFixture.진행중인_보약_캠페인(member));
+            Stock stock2 = new Stock(30);
+            stockRepository.save(stock2);
+            productRepository.save(
+                ProductFixture.재고가_설정된_이름있는_캠페인의_보약(campaign2, stock2, member, "아주 나쁜 보약"));
+
+            // when
+            List<ReadCampaignResponse> response = campaignService.searchByProductName("좋은", 0, 10);
+
+            // then
+            assertThat(response).hasSize(1);
+        }
+    }
 }

src/test/java/cholog/wiseshop/fixture/ProductFixture.java

@@ -18,6 +18,20 @@ public class ProductFixture {
             .build();
     }
 
+    public static Product 재고가_설정된_이름있는_캠페인의_보약(
+        Campaign campaign,
+        Stock stock,
+        Member owner,
+        String name) {
+        return Product.builder()
+            .name(name)
+            .campaign(campaign)
+            .price(1000)
+            .stock(stock)
+            .owner(owner)
+            .build();
+    }
+
     public static Product 재고가_설정된_캠페인의_보약(Campaign campaign, Stock stock, Member owner) {
         return Product.builder()
             .campaign(campaign)