Feat : 요즘 떠오르는 도시 api 생성 #1

src/main/java/umc/TripPiece/converter/ExploreConverter.java

@@ -26,4 +26,14 @@ public static ExploreResponseDto.ExploreListDto toExploreListDto(Travel travel)
                 .nickname(user.getNickname())
                 .build();
     }
+
+    public static ExploreResponseDto.PopularCitiesDto toPopularCitiesDto(City city){
+        return ExploreResponseDto.PopularCitiesDto.builder()
+                .id(city.getId())
+                .city(city.getName())
+                .country(city.getCountry().getName())
+                .thumbnail(city.getCityImage())
+                .count(city.getLogCount())
+                .build();
+    }
 }

src/main/java/umc/TripPiece/repository/CityRepository.java

@@ -17,4 +17,8 @@ public interface CityRepository extends JpaRepository<City, Long> {
     // 유저가 방문한 도시 리스트 조회
     @Query("SELECT DISTINCT c FROM City c JOIN Travel t ON t.city.id = c.id WHERE t.user.id = :userId")
     List<City> findCitiesByUserId(Long userId);
+
+    //도시별 여행기 수 내림차순
+    @Query("SELECT c FROM City c ORDER BY c.logCount DESC ")
+    List<City> findAllByOrderByLogCountDesc();
 }

src/main/java/umc/TripPiece/service/CityService.java

@@ -46,4 +46,5 @@ public List<CityResponseDto.searchDto> searchCity(String keyword){
 
         return searched;
     }
+
 }

src/main/java/umc/TripPiece/service/ExploreService.java

@@ -42,5 +42,11 @@ public List<ExploreResponseDto.ExploreListDto> searchTravels(String query){
     return travels.stream().distinct().map(ExploreConverter::toExploreListDto).toList();
     }
 
+    @Transactional
+    public List<ExploreResponseDto.PopularCitiesDto> getCitiesByTravelCount() {
+       List<City> cities = cityRepository.findAllByOrderByLogCountDesc();
+       return cities.stream().map(ExploreConverter::toPopularCitiesDto).toList();
+    }
+
 
 }

src/main/java/umc/TripPiece/web/controller/ExploreController.java

@@ -30,4 +30,14 @@ public ApiResponse<List<ExploreResponseDto.ExploreListDto>> getSearchedTravelLis
      }
         return ApiResponse.onSuccess(travels);
     }
+
+    @GetMapping("/popular")
+    @Operation(summary = "요즘 떠오르는 도시 API", description = "도시별 여행기순 내림차순")
+    public ApiResponse<List<ExploreResponseDto.PopularCitiesDto>> getPopularCities(){
+        List<ExploreResponseDto.PopularCitiesDto> cities = exploreService.getCitiesByTravelCount();
+        if(cities.isEmpty()){
+            return ApiResponse.onFailure("400", "생성된 여행기 없음.", null);
+        }
+        return ApiResponse.onSuccess(cities);
+    }
 }