feat: 이벤트 진행 상점 수 조회 API 추가

src/main/java/in/koreatech/koin/domain/shop/controller/ShopEventApi.java

@@ -1,7 +1,11 @@
 package in.koreatech.koin.domain.shop.controller;
 
+import static in.koreatech.koin.global.code.ApiResponseCode.OK;
+
+import in.koreatech.koin.domain.shop.dto.event.response.ShopEventCountResponse;
 import in.koreatech.koin.domain.shop.dto.event.response.ShopEventsWithBannerUrlResponse;
 import in.koreatech.koin.domain.shop.dto.event.response.ShopEventsWithThumbnailUrlResponse;
+import in.koreatech.koin.global.code.ApiResponseCodes;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.media.Content;
 import io.swagger.v3.oas.annotations.media.Schema;
@@ -40,4 +44,11 @@ ResponseEntity<ShopEventsWithThumbnailUrlResponse> getShopEvents(
     @Operation(summary = "모든 상점의 모든 이벤트 조회")
     @GetMapping("/shops/events")
     ResponseEntity<ShopEventsWithBannerUrlResponse> getShopAllEvent();
+
+    @ApiResponseCodes({
+        OK
+    })
+    @Operation(summary = "이벤트 진행 중인 상점 개수 조회")
+    @GetMapping("/shops/events/count")
+    ResponseEntity<ShopEventCountResponse> getEventShopCount();
 }

src/main/java/in/koreatech/koin/domain/shop/controller/ShopEventController.java

@@ -1,9 +1,9 @@
 package in.koreatech.koin.domain.shop.controller;
 
+import in.koreatech.koin.domain.shop.dto.event.response.ShopEventCountResponse;
 import in.koreatech.koin.domain.shop.dto.event.response.ShopEventsWithBannerUrlResponse;
 import in.koreatech.koin.domain.shop.dto.event.response.ShopEventsWithThumbnailUrlResponse;
 import in.koreatech.koin.domain.shop.service.ShopEventService;
-import in.koreatech.koin.domain.shop.service.ShopService;
 import lombok.RequiredArgsConstructor;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -29,4 +29,10 @@ public ResponseEntity<ShopEventsWithBannerUrlResponse> getShopAllEvent() {
         var response = shopEventService.getAllEvents();
         return ResponseEntity.ok(response);
     }
+
+    @GetMapping("/shops/events/count")
+    public ResponseEntity<ShopEventCountResponse> getEventShopCount() {
+        var response = shopEventService.getEventShopCount();
+        return ResponseEntity.ok(response);
+    }
 }

src/main/java/in/koreatech/koin/domain/shop/dto/event/response/ShopEventCountResponse.java

@@ -0,0 +1,11 @@
+package in.koreatech.koin.domain.shop.dto.event.response;
+
+import static io.swagger.v3.oas.annotations.media.Schema.RequiredMode.REQUIRED;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+public record ShopEventCountResponse(
+    @Schema(example = "5", description = "이벤트 진행 중인 상점 개수", requiredMode = REQUIRED)
+    Integer count
+) {
+}

src/main/java/in/koreatech/koin/domain/shop/repository/shop/ShopRepository.java

@@ -82,6 +82,17 @@ Long countOpenShops(
     """)
     List<Shop> findAllWithEventArticles();
 
+    @Query("""
+        SELECT COUNT(DISTINCT s.id)
+        FROM Shop s
+        JOIN s.eventArticles e
+        WHERE s.isDeleted = false
+        AND e.isDeleted = false
+        AND e.startDate <= :now
+        AND e.endDate >= :now
+    """)
+    Long countShopsWithOngoingEvent(@Param("now") LocalDate now);
+
     @Query("""
         SELECT new in.koreatech.koin.domain.shop.dto.shop.ShopNotificationQueryResponse(
             s.id,

src/main/java/in/koreatech/koin/domain/shop/service/ShopEventService.java

@@ -1,10 +1,12 @@
 package in.koreatech.koin.domain.shop.service;
 
+import in.koreatech.koin.domain.shop.dto.event.response.ShopEventCountResponse;
 import in.koreatech.koin.domain.shop.dto.event.response.ShopEventsWithBannerUrlResponse;
 import in.koreatech.koin.domain.shop.dto.event.response.ShopEventsWithThumbnailUrlResponse;
 import in.koreatech.koin.domain.shop.model.shop.Shop;
 import in.koreatech.koin.domain.shop.repository.shop.ShopRepository;
 import java.time.Clock;
+import java.time.LocalDate;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -27,4 +29,10 @@ public ShopEventsWithBannerUrlResponse getAllEvents() {
         List<Shop> shops = shopRepository.findAllWithEventArticles();
         return ShopEventsWithBannerUrlResponse.of(shops, clock);
     }
+
+    public ShopEventCountResponse getEventShopCount() {
+        LocalDate now = LocalDate.now(clock);
+        Long count = shopRepository.countShopsWithOngoingEvent(now);
+        return new ShopEventCountResponse(Math.toIntExact(count));
+    }
 }

src/test/java/in/koreatech/koin/acceptance/domain/ShopApiTest.java

@@ -576,6 +576,26 @@ void setUp() {
                 """));
     }
 
+    @Test
+    void 이벤트_진행중인_상점_개수를_조회한다() throws Exception {
+        Shop 영업중인_티바 = shopFixture.영업중인_티바(owner);
+        Shop 영업중이_아닌_신전떡볶이 = shopFixture.영업중이_아닌_신전_떡볶이(owner);
+        eventArticleFixture.할인_이벤트(마슬랜, LocalDate.now(clock).minusDays(3), LocalDate.now(clock).plusDays(3));
+        eventArticleFixture.참여_이벤트(마슬랜, LocalDate.now(clock).minusDays(3), LocalDate.now(clock).plusDays(3));
+        eventArticleFixture.참여_이벤트(영업중인_티바, LocalDate.now(clock), LocalDate.now(clock).plusDays(10));
+        eventArticleFixture.할인_이벤트(영업중이_아닌_신전떡볶이, LocalDate.now(clock).minusDays(10), LocalDate.now(clock).minusDays(1));
+
+        mockMvc.perform(
+                get("/shops/events/count")
+            )
+            .andExpect(status().isOk())
+            .andExpect(content().json("""
+                {
+                    "count": 2
+                }
+                """));
+    }
+
     @Test
     void 리뷰_평점순으로_정렬하여_모든_상점을_조회한다() throws Exception {
         Shop 영업중인_티바 = shopFixture.영업중인_티바(owner);