✨ feat : 문제와 함께 퀴즈 조회 API 구현

Author: silver-eunjoo

backend/src/main/java/io/f1/backend/domain/question/dto/QuestionResponse.java

@@ -0,0 +1,3 @@
+package io.f1.backend.domain.question.dto;
+
+public record QuestionResponse(Long id, String content, String answer) { }

backend/src/main/java/io/f1/backend/domain/question/entity/Question.java

@@ -15,9 +15,11 @@
 import jakarta.persistence.OneToOne;
 
 import lombok.AccessLevel;
+import lombok.Getter;
 import lombok.NoArgsConstructor;
 
 @Entity
+@Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class Question extends BaseEntity {
 

backend/src/main/java/io/f1/backend/domain/question/entity/TextQuestion.java

@@ -9,9 +9,11 @@
 import jakarta.persistence.OneToOne;
 
 import lombok.AccessLevel;
+import lombok.Getter;
 import lombok.NoArgsConstructor;
 
 @Entity
+@Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class TextQuestion {
 

backend/src/main/java/io/f1/backend/domain/quiz/api/QuizController.java

@@ -4,6 +4,7 @@
 import io.f1.backend.domain.quiz.dto.QuizCreateRequest;
 import io.f1.backend.domain.quiz.dto.QuizCreateResponse;
 import io.f1.backend.domain.quiz.dto.QuizListPageResponse;
+import io.f1.backend.domain.quiz.dto.QuizQuestionListResponse;
 import io.f1.backend.domain.quiz.dto.QuizUpdateRequest;
 
 import jakarta.validation.Valid;
@@ -78,4 +79,12 @@ public ResponseEntity<QuizListPageResponse> getQuizzes(
 
         return ResponseEntity.ok().body(quizzes);
     }
+
+    @GetMapping("/{quizId}")
+    public ResponseEntity<QuizQuestionListResponse> getQuizWithQuestions(@PathVariable Long quizId) {
+
+        QuizQuestionListResponse response = quizService.getQuizWithQuestions(quizId);
+
+        return ResponseEntity.ok().body(response);
+    }
 }

backend/src/main/java/io/f1/backend/domain/quiz/app/QuizService.java

@@ -1,9 +1,6 @@
 package io.f1.backend.domain.quiz.app;
 
-import static io.f1.backend.domain.quiz.mapper.QuizMapper.pageQuizToPageQuizListResponse;
-import static io.f1.backend.domain.quiz.mapper.QuizMapper.quizCreateRequestToQuiz;
-import static io.f1.backend.domain.quiz.mapper.QuizMapper.quizToQuizCreateResponse;
-import static io.f1.backend.domain.quiz.mapper.QuizMapper.toQuizListPageResponse;
+import static io.f1.backend.domain.quiz.mapper.QuizMapper.*;
 
 import static java.nio.file.Files.deleteIfExists;
 
@@ -14,6 +11,7 @@
 import io.f1.backend.domain.quiz.dto.QuizCreateResponse;
 import io.f1.backend.domain.quiz.dto.QuizListPageResponse;
 import io.f1.backend.domain.quiz.dto.QuizListResponse;
+import io.f1.backend.domain.quiz.dto.QuizQuestionListResponse;
 import io.f1.backend.domain.quiz.dto.QuizUpdateRequest;
 import io.f1.backend.domain.quiz.entity.Quiz;
 import io.f1.backend.domain.user.dao.UserRepository;
@@ -198,4 +196,11 @@ public Quiz getQuizById(Long quizId) {
                 .findById(quizId)
                 .orElseThrow(() -> new RuntimeException("E404002: 존재하지 않는 퀴즈입니다."));
     }
+
+    public QuizQuestionListResponse getQuizWithQuestions(Long quizId) {
+        Quiz quiz = quizRepository.findById(quizId)
+            .orElseThrow(() -> new NoSuchElementException("존재하지 않는 퀴즈입니다."));
+
+        return quizToQuizQuestionListResponse(quiz);
+    }
 }

backend/src/main/java/io/f1/backend/domain/quiz/dto/QuizQuestionListResponse.java

@@ -0,0 +1,9 @@
+package io.f1.backend.domain.quiz.dto;
+
+import io.f1.backend.domain.question.dto.QuestionResponse;
+import io.f1.backend.domain.quiz.entity.QuizType;
+import java.util.List;
+
+public record QuizQuestionListResponse(String title, QuizType quizType, Long creatorId, String description, String thumbnailUrl, int numberOfQuestion, List<QuestionResponse> questions) {
+
+}

backend/src/main/java/io/f1/backend/domain/quiz/mapper/QuizMapper.java

@@ -1,12 +1,16 @@
 package io.f1.backend.domain.quiz.mapper;
 
+import io.f1.backend.domain.question.dto.QuestionResponse;
+import io.f1.backend.domain.question.entity.Question;
 import io.f1.backend.domain.quiz.dto.QuizCreateRequest;
 import io.f1.backend.domain.quiz.dto.QuizCreateResponse;
 import io.f1.backend.domain.quiz.dto.QuizListPageResponse;
 import io.f1.backend.domain.quiz.dto.QuizListResponse;
+import io.f1.backend.domain.quiz.dto.QuizQuestionListResponse;
 import io.f1.backend.domain.quiz.entity.Quiz;
 import io.f1.backend.domain.user.entity.User;
 
+import java.util.List;
 import org.springframework.data.domain.Page;
 
 public class QuizMapper {
@@ -56,4 +60,26 @@ public static QuizListPageResponse toQuizListPageResponse(Page<QuizListResponse>
     public static Page<QuizListResponse> pageQuizToPageQuizListResponse(Page<Quiz> quizzes) {
         return quizzes.map(QuizMapper::quizToQuizListResponse);
     }
+
+    public static List<QuestionResponse> questionsToQuestionResponses(List<Question> questions) {
+        return questions.stream()
+            .map(question -> new QuestionResponse(
+                    question.getId(),
+                    question.getTextQuestion().getContent(),
+                    question.getAnswer()
+            ))
+            .toList();
+    }
+
+    public static QuizQuestionListResponse quizToQuizQuestionListResponse(Quiz quiz) {
+        return new QuizQuestionListResponse(
+            quiz.getTitle(),
+            quiz.getQuizType(),
+            quiz.getCreator().getId(),
+            quiz.getDescription(),
+            quiz.getThumbnailUrl(),
+            quiz.getQuestions().size(),
+            questionsToQuestionResponses(quiz.getQuestions())
+        );
+    }
 }