feat : 조회수 로직 추가

backend/src/main/java/org/example/backend/board/controller/BoardController.java

@@ -2,6 +2,8 @@
 
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
 import jakarta.validation.Valid;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
@@ -21,7 +23,6 @@
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RequestPart;
 import org.springframework.web.bind.annotation.RestController;
 import org.springframework.web.multipart.MultipartFile;
@@ -60,7 +61,12 @@ public ResponseDto<List<BoardResDto>> getBoardsByCategory(@PathVariable("categor
 
     @Operation(summary = "게시판 상세 정보 반환 API", description = "게시판 상세 정보 반환")
     @GetMapping("/{boardId}")
-    public ResponseEntity<BoardResDto> getBoard(@PathVariable(name = "boardId") Long boardId) {
+    public ResponseEntity<BoardResDto> getBoard(
+            @PathVariable(name = "boardId") Long boardId,
+            HttpServletRequest request,
+            HttpServletResponse response
+    ) {
+        boardService.incrementViewCount(boardId, request, response);
         BoardResDto boardResDto = boardService.getBoard(boardId);
         return new ResponseEntity<>(boardResDto, HttpStatus.OK);
     }

backend/src/main/java/org/example/backend/board/repository/BoardRepository.java

@@ -5,7 +5,14 @@
 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.Modifying;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 
 public interface BoardRepository extends JpaRepository<Board, Long> {
     Page<Board> findAllByCategory(Category category, Pageable pageable);
+    @Modifying
+    @Query("UPDATE Board b SET b.viewCount = b.viewCount + 1 WHERE b.id = :boardId")
+    void incrementViewCount(@Param("boardId") Long boardId);
+
 }

backend/src/main/java/org/example/backend/board/service/BoardService.java

@@ -2,6 +2,9 @@
 
 import static org.example.backend.board.exception.BoardExceptionType.NOT_FOUND_BOARD;
 
+import jakarta.servlet.http.Cookie;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
 import java.util.ArrayList;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
@@ -83,4 +86,40 @@ private void fileUpload(BoardReqDto boardReqDto, List<MultipartFile> multipartFi
             boardReqDto.setFileList(updateImageUrlList);
         }
     }
+
+    @Transactional
+    public void incrementViewCount(Long boardId, HttpServletRequest request, HttpServletResponse response) {
+        Cookie oldCookie = null;
+        Cookie[] cookies = request.getCookies();
+
+        if (cookies != null) {
+            for (Cookie cookie : cookies) {
+                if (cookie.getName().equals("postView")) {
+                    oldCookie = cookie;
+                    break;
+                }
+            }
+        }
+
+        if (oldCookie != null) {
+            if (!oldCookie.getValue().contains("[" + boardId + "]")) {
+                readCount(boardId);
+                oldCookie.setValue(oldCookie.getValue() + "_[" + boardId + "]");
+                oldCookie.setPath("/");
+                oldCookie.setMaxAge(60 * 60 * 24);
+                response.addCookie(oldCookie);
+            }
+        } else {
+            readCount(boardId);
+            Cookie newCookie = new Cookie("postView", "[" + boardId + "]");
+            newCookie.setPath("/");
+            newCookie.setMaxAge(60 * 60 * 24);
+            response.addCookie(newCookie);
+        }
+    }
+
+    @Transactional
+    public void readCount(Long boardId) {
+        boardRepository.incrementViewCount(boardId);
+    }
 }