Merge pull request #21 from mju-likelion/feature/introduce-get-studen…

…tid-api-#20

Feature/#20 특정 학번 자기소개서 조회 api 개발

src/main/java/org/mjulikelion/baker/config/CacheConfig.java

@@ -0,0 +1,9 @@
+package org.mjulikelion.baker.config;
+
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@EnableCaching
+public class CacheConfig {
+}

src/main/java/org/mjulikelion/baker/constant/RegexPatterns.java

@@ -0,0 +1,5 @@
+package org.mjulikelion.baker.constant;
+
+public class RegexPatterns {
+    public static final String APPLICATION_STUDENT_ID_PATTERN = "^60\\d{6}$";//60으로 시작하고 그 뒤로 숫자 6개인 문자열
+}

src/main/java/org/mjulikelion/baker/controller/ExceptionController.java

@@ -7,6 +7,8 @@
 import org.mjulikelion.baker.dto.response.ResponseDto;
 import org.mjulikelion.baker.errorcode.ErrorCode;
 import org.mjulikelion.baker.errorcode.ValidationErrorCode;
+import org.mjulikelion.baker.exception.ApplicationIntroduceNotFoundException;
+import org.mjulikelion.baker.exception.ApplicationNotFoundException;
 import org.mjulikelion.baker.exception.AuthenticationException;
 import org.mjulikelion.baker.exception.InvalidDataException;
 import org.mjulikelion.baker.exception.JwtException;
@@ -144,4 +146,24 @@ public ResponseEntity<ResponseDto<Void>> handleAuthenticationException(
         ResponseDto<Void> responseDto = getFromCustomException(authenticationException);
         return new ResponseEntity<>(responseDto, HttpStatus.UNAUTHORIZED);
     }
+
+    //ApplicationNotFoundException 예외를 처리하는 핸들러(해당 지원서가 존재하지 않는 경우)
+    @ResponseStatus(HttpStatus.NOT_FOUND)
+    @ExceptionHandler(ApplicationNotFoundException.class)
+    public ResponseEntity<ResponseDto<Void>> handleApplicationNotFoundException(
+            ApplicationNotFoundException applicationNotFoundException) {
+        log.error("ApplicationNotFoundException: {}", applicationNotFoundException.getMessage());
+        ResponseDto<Void> responseDto = getFromCustomException(applicationNotFoundException);
+        return new ResponseEntity<>(responseDto, HttpStatus.NOT_FOUND);
+    }
+
+    //ApplicationIntroduceNotFoundException 예외를 처리하는 핸들러(해당 지원서에 자기소개가 존재하지 않는 경우)
+    @ResponseStatus(HttpStatus.NOT_FOUND)
+    @ExceptionHandler(ApplicationIntroduceNotFoundException.class)
+    public ResponseEntity<ResponseDto<Void>> handleApplicationIntroduceNotFoundException(
+            ApplicationIntroduceNotFoundException applicationIntroduceNotFoundException) {
+        log.error("ApplicationIntroduceNotFoundException: {}", applicationIntroduceNotFoundException.getMessage());
+        ResponseDto<Void> responseDto = getFromCustomException(applicationIntroduceNotFoundException);
+        return new ResponseEntity<>(responseDto, HttpStatus.NOT_FOUND);
+    }
 }

src/main/java/org/mjulikelion/baker/controller/IntroduceController.java

@@ -0,0 +1,31 @@
+package org.mjulikelion.baker.controller;
+
+import static org.mjulikelion.baker.constant.RegexPatterns.APPLICATION_STUDENT_ID_PATTERN;
+
+import jakarta.validation.constraints.Pattern;
+import lombok.AllArgsConstructor;
+import org.mjulikelion.baker.dto.response.ResponseDto;
+import org.mjulikelion.baker.dto.response.introduce.IntroduceGetResponseData;
+import org.mjulikelion.baker.service.introduce.IntroduceQueryService;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@AllArgsConstructor
+@RequestMapping("introduce")
+public class IntroduceController {
+    private final IntroduceQueryService introduceQueryService;
+
+    @GetMapping()
+    @Cacheable(value = "applicationByStudentId", key = "#studentId")
+    public ResponseEntity<ResponseDto<IntroduceGetResponseData>> getStudentIntroduce(
+            @RequestParam(value = "studentId")
+            @Pattern(regexp = APPLICATION_STUDENT_ID_PATTERN, message = "학번이 형식에 맞지 않습니다.") String studentId
+    ) {
+        return this.introduceQueryService.getStudentIntroduce(studentId);
+    }
+}

src/main/java/org/mjulikelion/baker/dto/response/introduce/IntroduceGetResponseData.java

@@ -0,0 +1,15 @@
+package org.mjulikelion.baker.dto.response.introduce;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import java.util.List;
+import lombok.Builder;
+import org.mjulikelion.baker.model.Part;
+import org.mjulikelion.baker.vo.IntroduceDetailVO;
+
+@Builder
+public class IntroduceGetResponseData {
+    @JsonProperty
+    private final Part part;
+    @JsonProperty
+    private final List<IntroduceDetailVO> introduceDetailVOList;
+}

src/main/java/org/mjulikelion/baker/errorcode/ErrorCode.java

@@ -11,6 +11,8 @@ public enum ErrorCode {
     //잘못된 경로, 메소드 오류들
     METHOD_NOT_ALLOWED_ERROR("4050", "허용되지 않은 메소드 입니다."),//허용되지 않은 메소드
     NO_RESOURCE_ERROR("4040", "해당 리소스를 찾을 수 없습니다."),//리소스를 찾을 수 없음(잘못된 URI)
+    APPLICATION_NOT_FOUND_ERROR("4041", "해당 지원서가 존재하지 않습니다."),//지원서가 존재하지 않음
+    APPLICATION_INTRODUCE_NOT_FOUND_ERROR("4042", "해당 지원서에 자기소개가 존재하지 않습니다."),//자기소개가 존재하지 않음
     //잘못된 데이터 오류들
     INVALID_REQUEST_FORMAT_ERROR("4000", "유효하지 않은 Body 형식입니다."),//요청 형식이 잘못됨
     INVALID_PART_ERROR("4001", "유효하지 않은 파트입니다."),//유효하지 않은 파트

src/main/java/org/mjulikelion/baker/exception/ApplicationIntroduceNotFoundException.java

@@ -0,0 +1,9 @@
+package org.mjulikelion.baker.exception;
+
+import org.mjulikelion.baker.errorcode.ErrorCode;
+
+public class ApplicationIntroduceNotFoundException extends CustomException {
+    public ApplicationIntroduceNotFoundException(ErrorCode errorCode) {
+        super(errorCode);
+    }
+}

src/main/java/org/mjulikelion/baker/exception/ApplicationNotFoundException.java

@@ -0,0 +1,9 @@
+package org.mjulikelion.baker.exception;
+
+import org.mjulikelion.baker.errorcode.ErrorCode;
+
+public class ApplicationNotFoundException extends CustomException {
+    public ApplicationNotFoundException(ErrorCode errorCode) {
+        super(errorCode);
+    }
+}

src/main/java/org/mjulikelion/baker/model/Application.java

@@ -65,7 +65,7 @@ public class Application {
     @CreatedDate
     private Date createdAt;
 
-    @OneToMany(mappedBy = "application", orphanRemoval = true, fetch = FetchType.LAZY)
+    @OneToMany(mappedBy = "application", orphanRemoval = true, fetch = FetchType.EAGER)
     private List<ApplicationIntroduce> introduces;
 
     @OneToMany(mappedBy = "application", orphanRemoval = true, fetch = FetchType.LAZY)

src/main/java/org/mjulikelion/baker/model/ApplicationIntroduce.java

@@ -26,7 +26,7 @@ public class ApplicationIntroduce {
     @GeneratedValue(strategy = GenerationType.AUTO, generator = "uuid2")
     private UUID id;
 
-    @ManyToOne(cascade = CascadeType.ALL, optional = false, fetch = FetchType.EAGER)
+    @ManyToOne(cascade = CascadeType.ALL, optional = false, fetch = FetchType.LAZY)
     @JoinColumn(name = "application_id")
     private Application application;
 

src/main/java/org/mjulikelion/baker/repository/ApplicationIntroduceRepository.java

@@ -1,8 +1,10 @@
 package org.mjulikelion.baker.repository;
 
+import java.util.List;
 import java.util.UUID;
 import org.mjulikelion.baker.model.ApplicationIntroduce;
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface ApplicationIntroduceRepository extends JpaRepository<ApplicationIntroduce, UUID> {
+    List<ApplicationIntroduce> findByApplicationId(UUID applicationId);
 }

src/main/java/org/mjulikelion/baker/repository/ApplicationRepository.java

@@ -1,5 +1,6 @@
 package org.mjulikelion.baker.repository;
 
+import java.util.Optional;
 import java.util.UUID;
 import org.mjulikelion.baker.model.Application;
 import org.mjulikelion.baker.model.Part;
@@ -10,5 +11,7 @@
 public interface ApplicationRepository extends JpaRepository<Application, UUID> {
     Long countAllByPart(Part part);
 
+    Optional<Application> findByStudentId(String studentId);
+
     Page<Application> findAllByPart(Part part, Pageable pageable);
 }

src/main/java/org/mjulikelion/baker/service/introduce/IntroduceQueryService.java

@@ -0,0 +1,9 @@
+package org.mjulikelion.baker.service.introduce;
+
+import org.mjulikelion.baker.dto.response.ResponseDto;
+import org.mjulikelion.baker.dto.response.introduce.IntroduceGetResponseData;
+import org.springframework.http.ResponseEntity;
+
+public interface IntroduceQueryService {
+    ResponseEntity<ResponseDto<IntroduceGetResponseData>> getStudentIntroduce(String studentId);
+}

src/main/java/org/mjulikelion/baker/service/introduce/IntroduceQueryServiceImpl.java

@@ -0,0 +1,82 @@
+package org.mjulikelion.baker.service.introduce;
+
+import static org.mjulikelion.baker.errorcode.ErrorCode.APPLICATION_INTRODUCE_NOT_FOUND_ERROR;
+import static org.mjulikelion.baker.errorcode.ErrorCode.APPLICATION_NOT_FOUND_ERROR;
+
+import java.util.Comparator;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.stream.Collectors;
+import lombok.AllArgsConstructor;
+import org.mjulikelion.baker.dto.response.ResponseDto;
+import org.mjulikelion.baker.dto.response.introduce.IntroduceGetResponseData;
+import org.mjulikelion.baker.exception.ApplicationIntroduceNotFoundException;
+import org.mjulikelion.baker.exception.ApplicationNotFoundException;
+import org.mjulikelion.baker.model.Application;
+import org.mjulikelion.baker.model.ApplicationIntroduce;
+import org.mjulikelion.baker.model.Introduce;
+import org.mjulikelion.baker.repository.ApplicationIntroduceRepository;
+import org.mjulikelion.baker.repository.ApplicationRepository;
+import org.mjulikelion.baker.vo.IntroduceDetailVO;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@AllArgsConstructor
+public class IntroduceQueryServiceImpl implements IntroduceQueryService {
+    private final ApplicationRepository applicationRepository;
+    private final ApplicationIntroduceRepository applicationIntroduceRepository;
+
+    @Override
+    @Transactional(readOnly = true)
+    public ResponseEntity<ResponseDto<IntroduceGetResponseData>> getStudentIntroduce(String studentId) {
+        Application application = this.findApplicationByStudentId(studentId);
+        List<ApplicationIntroduce> applicationIntroduceList = this.findApplicationIntroduces(application.getId());
+        List<IntroduceDetailVO> introduceDetailVOList = this.buildIntroduceDetailVOList(applicationIntroduceList);
+
+        IntroduceGetResponseData introduceGetResponseData = IntroduceGetResponseData.builder()
+                .introduceDetailVOList(introduceDetailVOList)
+                .part(application.getPart())
+                .build();
+
+        return ResponseEntity.ok(ResponseDto.res(HttpStatus.OK, "OK", introduceGetResponseData));
+    }
+
+    private Application findApplicationByStudentId(String studentId) {
+        return this.applicationRepository.findByStudentId(studentId)
+                .orElseThrow(() -> new ApplicationNotFoundException(APPLICATION_NOT_FOUND_ERROR));
+    }
+
+    private List<ApplicationIntroduce> findApplicationIntroduces(UUID applicationId) {
+        List<ApplicationIntroduce> applicationIntroduceList = this.applicationIntroduceRepository.findByApplicationId(
+                applicationId);
+        if (applicationIntroduceList.isEmpty()) {
+            throw new ApplicationIntroduceNotFoundException(APPLICATION_INTRODUCE_NOT_FOUND_ERROR);
+        }
+        return applicationIntroduceList;
+    }
+
+    private List<IntroduceDetailVO> buildIntroduceDetailVOList(List<ApplicationIntroduce> applicationIntroduceList) {
+        Map<Introduce, String> introduceMap = applicationIntroduceList.stream()
+                .sorted(Comparator.comparingInt(a -> a.getIntroduce().getSequence()))
+                .collect(Collectors.toMap(
+                        ApplicationIntroduce::getIntroduce,
+                        ApplicationIntroduce::getContent,
+                        (a, b) -> b,
+                        LinkedHashMap::new
+                ));
+
+        return introduceMap.keySet().stream()
+                .map(introduce -> IntroduceDetailVO.builder()
+                        .sequence(introduce.getSequence())
+                        .title(introduce.getTitle())
+                        .content(introduceMap.get(introduce))
+                        .build())
+                .collect(Collectors.toList());
+    }
+}
+

src/main/java/org/mjulikelion/baker/vo/IntroduceDetailVO.java

@@ -0,0 +1,14 @@
+package org.mjulikelion.baker.vo;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import lombok.Builder;
+
+@Builder
+public class IntroduceDetailVO {
+    @JsonProperty
+    private final int sequence;
+    @JsonProperty
+    private final String title;
+    @JsonProperty
+    private final String content;
+}