[UNI-13] feat: 상세 건물 노드 조회 API

uniro_backend/src/main/java/com/softeer5/uniro_backend/common/error/ErrorCode.java

@@ -1,5 +1,7 @@
 package com.softeer5.uniro_backend.common.error;
 
+import org.springframework.http.HttpStatus;
+
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 
@@ -8,8 +10,12 @@
 public enum ErrorCode {
     // 길찾기
     FASTEST_ROUTE_NOT_FOUND(422, "경로가 없습니다."),
-    SAME_START_AND_END_POINT(400, "출발지와 도착지가 같습니다.");
+    SAME_START_AND_END_POINT(400, "출발지와 도착지가 같습니다."),
+
+    // 건물 노드
+    BUILDING_NOT_FOUND(404, "유효한 건물을 찾을 수 없습니다."),
+    ;
 
-    final private int httpStatus;
-    final private String message;
+    private final int httpStatus;
+    private final String message;
 }

uniro_backend/src/main/java/com/softeer5/uniro_backend/common/error/ErrorResponse.java

@@ -5,7 +5,7 @@
 
 @Getter
 @Setter
-public class ErrorResponse extends Error {
+public class ErrorResponse {
     private int status;
     private String message;
 

uniro_backend/src/main/java/com/softeer5/uniro_backend/common/exception/custom/BuildingNotFoundException.java

@@ -0,0 +1,13 @@
+package com.softeer5.uniro_backend.common.exception.custom;
+
+import com.softeer5.uniro_backend.common.error.ErrorCode;
+import com.softeer5.uniro_backend.common.exception.CustomException;
+
+import lombok.Getter;
+
+@Getter
+public class BuildingNotFoundException extends CustomException {
+	public BuildingNotFoundException(String message, ErrorCode errorCode) {
+		super(message, errorCode);
+	}
+}

uniro_backend/src/main/java/com/softeer5/uniro_backend/node/controller/NodeApi.java

@@ -42,4 +42,14 @@ ResponseEntity<SearchBuildingResDTO> searchBuildings(
 		@RequestParam(value = "cursor-id", required = false) Long cursorId,
 		@RequestParam(value = "page-size", required = false) Integer pageSize
 	);
+
+	@Operation(summary = "상세 건물 노드 조회")
+	@ApiResponses(value = {
+		@ApiResponse(responseCode = "200", description = "상세 건물 노드 조회 성공"),
+		@ApiResponse(responseCode = "400", description = "EXCEPTION(임시)", content = @Content),
+	})
+	ResponseEntity<GetBuildingResDTO> getBuilding(
+		@PathVariable("univId") Long univId,
+		@PathVariable("nodeId") Long nodeId
+	);
 }

uniro_backend/src/main/java/com/softeer5/uniro_backend/node/controller/NodeController.java

@@ -46,4 +46,14 @@ public ResponseEntity<SearchBuildingResDTO> searchBuildings(
 		return ResponseEntity.ok().body(searchBuildingResDTO);
 	}
 
+	@Override
+	@GetMapping("{univId}/nodes/buildings/{nodeId}")
+	public ResponseEntity<GetBuildingResDTO> getBuilding(
+		@PathVariable("univId") Long univId,
+		@PathVariable("nodeId") Long nodeId) {
+
+		GetBuildingResDTO buildingResDTO = nodeService.getBuilding(nodeId);
+		return ResponseEntity.ok().body(buildingResDTO);
+	}
+
 }

uniro_backend/src/main/java/com/softeer5/uniro_backend/node/repository/BuildingRepository.java

@@ -1,6 +1,7 @@
 package com.softeer5.uniro_backend.node.repository;
 
 import java.util.List;
+import java.util.Optional;
 
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.Query;
@@ -20,4 +21,12 @@ public interface BuildingRepository extends JpaRepository<Building, Long>, Build
         AND ST_Within(n.coordinates, ST_MakeEnvelope(:lux, :luy, :rdx, :rdy, 4326))
     """)
 	List<BuildingNode> findByUnivIdAndLevelWithNode(Long univId, int level, double lux , double luy, double rdx , double rdy);
+
+	@Query("""
+        SELECT new com.softeer5.uniro_backend.node.dto.BuildingNode(b, n)
+        FROM Building b 
+        JOIN FETCH Node n ON b.nodeId = n.id
+        WHERE b.nodeId = :nodeId
+    """)
+	Optional<BuildingNode> findByNodeIdWithNode(Long nodeId);
 }

uniro_backend/src/main/java/com/softeer5/uniro_backend/node/service/NodeService.java

@@ -1,11 +1,14 @@
 package com.softeer5.uniro_backend.node.service;
 
 import java.util.List;
+import java.util.Optional;
 
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import com.softeer5.uniro_backend.common.CursorPage;
+import com.softeer5.uniro_backend.common.error.ErrorCode;
+import com.softeer5.uniro_backend.common.exception.custom.BuildingNotFoundException;
 import com.softeer5.uniro_backend.node.dto.BuildingNode;
 import com.softeer5.uniro_backend.node.dto.GetBuildingResDTO;
 import com.softeer5.uniro_backend.node.dto.SearchBuildingResDTO;
@@ -42,4 +45,13 @@ public SearchBuildingResDTO searchBuildings(Long univId, String name, Long curso
 		return SearchBuildingResDTO.of(data, buildingNodes.getNextCursor(), buildingNodes.isHasNext());
 	}
 
+	public GetBuildingResDTO getBuilding(Long nodeId){
+		Optional<BuildingNode> buildingNode = buildingRepository.findByNodeIdWithNode(nodeId);
+		if(buildingNode.isEmpty()){
+			throw new BuildingNotFoundException("Building Not Found", ErrorCode.BUILDING_NOT_FOUND);
+		}
+
+		return GetBuildingResDTO.of(buildingNode.get().getBuilding(), buildingNode.get().getNode());
+	}
+
 }