[EA3-143] feature: 퀴즈 요청 시점에 해당 게시글에 이미 퀴즈가 존재한다면 생성하지 않고 조회하는 로직 추가

Author: hyeunS-P

src/main/java/grep/neogul_coder/domain/prtemplate/service/LinkService.java

@@ -3,24 +3,17 @@
 import grep.neogul_coder.domain.prtemplate.controller.dto.request.LinkUpdateRequest;
 import grep.neogul_coder.domain.prtemplate.entity.Link;
 import grep.neogul_coder.domain.prtemplate.repository.LinkRepository;
-import grep.neogul_coder.domain.prtemplate.repository.PrTemplateRepository;
 import jakarta.transaction.Transactional;
-import java.util.Map;
-import java.util.Optional;
-import java.util.Set;
-import java.util.stream.Collectors;
+import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
-import java.util.List;
-
 @Service
 @RequiredArgsConstructor
 @Transactional
 public class LinkService {
 
     private final LinkRepository linkRepository;
-    private final PrTemplateRepository prTemplateRepository;
 
     public void deleteByUserId(Long userId) {
         List<Link> links = linkRepository.findAllByUserId(userId);

src/main/java/grep/neogul_coder/domain/quiz/controller/AiQuizController.java

@@ -1,13 +1,16 @@
 package grep.neogul_coder.domain.quiz.controller;
 
 import grep.neogul_coder.domain.quiz.controller.dto.response.QuizResponse;
+import grep.neogul_coder.domain.quiz.entity.Quiz;
 import grep.neogul_coder.domain.quiz.exception.PostNotFreeException;
 import grep.neogul_coder.domain.quiz.exception.code.QuizErrorCode;
+import grep.neogul_coder.domain.quiz.repository.AiQuizRepository;
 import grep.neogul_coder.domain.quiz.service.AiQuizServiceImpl;
 import grep.neogul_coder.domain.studypost.Category;
 import grep.neogul_coder.domain.studypost.StudyPost;
 import grep.neogul_coder.domain.studypost.service.StudyPostService;
 import grep.neogul_coder.global.response.ApiResponse;
+import java.util.Optional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -21,16 +24,24 @@ public class AiQuizController implements AiQuizSpecification {
 
     private final StudyPostService studyPostService;
     private final AiQuizServiceImpl aiQuizServiceImpl;
+    private final AiQuizRepository aiQuizRepository;
 
     @GetMapping("/{postId}")
     public ApiResponse<QuizResponse> get(@PathVariable("postId") Long postId) {
         StudyPost post = studyPostService.findById(postId);
-
-        if(!Category.FREE.equals((post.getCategory()))){
+        if (!Category.FREE.equals((post.getCategory()))) {
             throw new PostNotFreeException(QuizErrorCode.POST_NOT_FREE_ERROR);
         }
 
-        QuizResponse quizResponse = aiQuizServiceImpl.createAndSaveQuiz(postId,post.getContent());
+        Optional<Quiz> quiz = aiQuizRepository.findByPostId(postId);
+
+        if (quiz.isPresent()) {
+            Quiz q = quiz.get();
+            QuizResponse quizResponse = QuizResponse.toResponse(q.getQuizContent(), q.isQuizAnswer());
+            return ApiResponse.success(quizResponse);
+        }
+
+        QuizResponse quizResponse = aiQuizServiceImpl.createAndSaveQuiz(postId, post.getContent());
         return ApiResponse.success(quizResponse);
     }
 

src/main/java/grep/neogul_coder/domain/quiz/controller/dto/response/QuizResponse.java

@@ -1,6 +1,7 @@
 package grep.neogul_coder.domain.quiz.controller.dto.response;
 
 import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.Builder;
 import lombok.Data;
 
 @Schema(description = "퀴즈 응답 DTO")
@@ -13,4 +14,17 @@ public class QuizResponse {
     @Schema(description = "퀴즈 정답 여부", example = "true")
     private Boolean quizAnswer;
 
+    @Builder
+    private QuizResponse(String quizContent, Boolean quizAnswer) {
+        this.quizContent = quizContent;
+        this.quizAnswer = quizAnswer;
+    }
+
+    public static QuizResponse toResponse(String quizContent, Boolean quizAnswer) {
+        return QuizResponse.builder()
+            .quizContent(quizContent)
+            .quizAnswer(quizAnswer)
+            .build();
+    }
+
 }

src/main/java/grep/neogul_coder/domain/quiz/entity/Quiz.java

@@ -7,7 +7,9 @@
 import jakarta.persistence.Id;
 import jakarta.validation.constraints.NotNull;
 import lombok.Builder;
+import lombok.Getter;
 
+@Getter
 @Entity
 public class Quiz extends BaseEntity {
 
@@ -19,7 +21,7 @@ public class Quiz extends BaseEntity {
     private Long postId;
 
     @NotNull
-    private String quiz;
+    private String quizContent;
 
     @NotNull
     private boolean quizAnswer;
@@ -28,15 +30,15 @@ public class Quiz extends BaseEntity {
     protected Quiz(Long id, Long postId, String quiz, boolean quizAnswer) {
         this.id = id;
         this.postId = postId;
-        this.quiz = quiz;
+        this.quizContent = quiz;
         this.quizAnswer = quizAnswer;
     }
 
     protected Quiz() {
 
     }
 
-    public Quiz QuizInit(Long postId, String quiz, boolean quizAnswer){
+    public Quiz QuizInit(Long postId, String quiz, boolean quizAnswer) {
         return Quiz.builder()
             .postId(postId)
             .quiz(quiz)

src/main/java/grep/neogul_coder/domain/quiz/exception/QuizNotFoundException.java

@@ -0,0 +1,11 @@
+package grep.neogul_coder.domain.quiz.exception;
+
+import grep.neogul_coder.global.exception.business.NotFoundException;
+import grep.neogul_coder.global.response.code.ErrorCode;
+
+public class QuizNotFoundException extends NotFoundException {
+
+    public QuizNotFoundException(ErrorCode errorcode) {
+        super(errorcode);
+    }
+}

src/main/java/grep/neogul_coder/domain/quiz/exception/advice/QuizAdvice.java

@@ -1,6 +1,7 @@
 package grep.neogul_coder.domain.quiz.exception.advice;
 
 import grep.neogul_coder.domain.quiz.exception.PostNotFreeException;
+import grep.neogul_coder.domain.quiz.exception.QuizNotFoundException;
 import grep.neogul_coder.domain.quiz.exception.code.QuizErrorCode;
 import grep.neogul_coder.global.response.ApiResponse;
 import org.springframework.http.HttpStatus;
@@ -18,4 +19,11 @@ public ResponseEntity<ApiResponse<Void>> postNotFreeException(PostNotFreeExcepti
             .body(ApiResponse.errorWithoutData(QuizErrorCode.POST_NOT_FREE_ERROR));
     }
 
+    @ExceptionHandler(QuizNotFoundException.class)
+    public ResponseEntity<ApiResponse<Void>> quizNotFreeException(PostNotFreeException e) {
+        return ResponseEntity
+            .status(HttpStatus.BAD_REQUEST)
+            .body(ApiResponse.errorWithoutData(QuizErrorCode.QUIZ_NOT_FOUND));
+    }
+
 }

src/main/java/grep/neogul_coder/domain/quiz/exception/code/QuizErrorCode.java

@@ -7,7 +7,8 @@
 @Getter
 public enum QuizErrorCode implements ErrorCode {
 
-    POST_NOT_FREE_ERROR("Q001",HttpStatus.BAD_REQUEST,"자유 게시글이 아닙니다.");
+    POST_NOT_FREE_ERROR("Q001",HttpStatus.BAD_REQUEST,"자유 게시글이 아닙니다."),
+    QUIZ_NOT_FOUND("Q002",HttpStatus.NOT_FOUND,"퀴즈가 없습니다.");
 
     private final String code;
     private final HttpStatus status;

src/main/java/grep/neogul_coder/domain/quiz/repository/AiQuizRepository.java

@@ -1,10 +1,11 @@
 package grep.neogul_coder.domain.quiz.repository;
 
 import grep.neogul_coder.domain.quiz.entity.Quiz;
+import java.util.Optional;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 @Repository
 public interface AiQuizRepository extends JpaRepository<Quiz, Long> {
-
+    Optional<Quiz> findByPostId(Long postId);
 }