feature: 퀴즈 정답 제출 API 구현 (#47)

* feature: 퀴즈 정답 제출 구현

* refactor: 퀴즈 정답 제출 api 수정

---------

Co-authored-by: sleepyhoon <[email protected]>

src/main/java/com/goldbalance/dive/domain/article/controller/ArticleController.java

@@ -4,6 +4,8 @@
 import com.goldbalance.dive.domain.article.domain.Quiz;
 import com.goldbalance.dive.domain.article.dto.ArticleDto;
 import com.goldbalance.dive.domain.article.dto.request.ArticleQueryOption;
+import com.goldbalance.dive.domain.article.dto.request.QuizRequest;
+import com.goldbalance.dive.domain.article.dto.response.QuizResult;
 import com.goldbalance.dive.domain.article.service.ArticleService;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
@@ -33,4 +35,10 @@ public ResponseEntity<ArticleDto> getArticleContents(@PathVariable Long articleI
         ArticleDto response = articleService.getArticleContents(nickname, articleId);
         return ResponseEntity.ok(response);
     }
+
+    @PostMapping("/quizzes/{articleId}")
+    public ResponseEntity<QuizResult> gradeQuizzes(@PathVariable Long articleId, @RequestBody QuizRequest request) {
+        QuizResult response = articleService.gradeQuizzes(articleId, request);
+        return ResponseEntity.ok(response);
+    }
 }

src/main/java/com/goldbalance/dive/domain/article/domain/ArticleContent.java

@@ -3,27 +3,6 @@
 import jakarta.persistence.*;
 import lombok.*;
 
-/**
- * <br>package name   : com.goldbalance.dive.domain.article.domain
- * <br>file name      : ArticleContent
- * <br>date           : 2024-07-27
- * <pre>
- * <span style="color: white;">[description]</span>
- *
- * </pre>
- * <pre>
- * <span style="color: white;">usage:</span>
- * {@code
- *
- * } </pre>
- * <pre>
- * modified log :
- * =======================================================
- * DATE           AUTHOR               NOTE
- * -------------------------------------------------------
- * 2024-07-27        SeungHoon              init create
- * </pre>
- */
 @Entity
 @Getter
 @RequiredArgsConstructor

src/main/java/com/goldbalance/dive/domain/article/dto/request/QuizRecordRequest.java

@@ -0,0 +1,5 @@
+package com.goldbalance.dive.domain.article.dto.request;
+
+import com.goldbalance.dive.domain.article.domain.OptionType;
+
+public record QuizRecordRequest(Long quizId, int number, OptionType answer) {}

src/main/java/com/goldbalance/dive/domain/article/dto/request/QuizRequest.java

@@ -0,0 +1,5 @@
+package com.goldbalance.dive.domain.article.dto.request;
+
+import java.util.List;
+
+public record QuizRequest(String nickname, int totalQuizzes, List<QuizRecordRequest> quizzes) {}

src/main/java/com/goldbalance/dive/domain/article/dto/response/QuizRecordResponse.java

@@ -0,0 +1,3 @@
+package com.goldbalance.dive.domain.article.dto.response;
+
+public record QuizRecordResponse(Long quizId, int number, String submittedAnswer, String correctAnswer) {}

src/main/java/com/goldbalance/dive/domain/article/dto/response/QuizResult.java

@@ -0,0 +1,31 @@
+package com.goldbalance.dive.domain.article.dto.response;
+
+import com.goldbalance.dive.domain.member.domain.Member;
+import java.util.List;
+
+public record QuizResult(
+        String nickname,
+        long earnedMileages,
+        long totalMileages,
+        int totalQuizzes,
+        int correctQuizzes,
+        String title,
+        List<QuizRecordResponse> response) {
+
+    public static QuizResult of(
+            Member member,
+            long earnedMileages,
+            int totalQuizzes,
+            int correctQuizzes,
+            String title,
+            List<QuizRecordResponse> response) {
+        return new QuizResult(
+                member.getNickname(),
+                earnedMileages,
+                member.getTotalMileage(),
+                totalQuizzes,
+                correctQuizzes,
+                title,
+                response);
+    }
+}

src/main/java/com/goldbalance/dive/domain/article/repository/AnswerRepository.java

@@ -0,0 +1,10 @@
+package com.goldbalance.dive.domain.article.repository;
+
+import com.goldbalance.dive.domain.article.domain.Answer;
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface AnswerRepository extends JpaRepository<Answer, Long> {
+
+    Optional<Answer> findByQuizId(Long quizId);
+}

src/main/java/com/goldbalance/dive/domain/article/repository/quiz/QuizCustomRepository.java

@@ -1,8 +1,12 @@
 package com.goldbalance.dive.domain.article.repository.quiz;
 
+import com.goldbalance.dive.domain.article.domain.Answer;
 import com.goldbalance.dive.domain.article.domain.Quiz;
+import com.goldbalance.dive.domain.article.dto.request.QuizRequest;
 import java.util.List;
 
 public interface QuizCustomRepository {
     List<Quiz> searchQuiz(Long articleId);
+
+    List<Answer> getAnswers(QuizRequest quizRequest);
 }

src/main/java/com/goldbalance/dive/domain/article/repository/quiz/QuizCustomRepositoryImpl.java

@@ -1,10 +1,15 @@
 package com.goldbalance.dive.domain.article.repository.quiz;
 
+import static com.goldbalance.dive.domain.article.domain.QAnswer.answer;
 import static com.goldbalance.dive.domain.article.domain.QQuiz.quiz;
 
+import com.goldbalance.dive.domain.article.domain.Answer;
 import com.goldbalance.dive.domain.article.domain.Quiz;
+import com.goldbalance.dive.domain.article.dto.request.QuizRecordRequest;
+import com.goldbalance.dive.domain.article.dto.request.QuizRequest;
 import com.querydsl.jpa.impl.JPAQueryFactory;
 import java.util.List;
+import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 
 @RequiredArgsConstructor
@@ -19,4 +24,15 @@ public List<Quiz> searchQuiz(Long articleId) {
                 .where(quiz.article.id.eq(articleId))
                 .fetch();
     }
+
+    @Override
+    public List<Answer> getAnswers(QuizRequest quizRequest) {
+        List<QuizRecordRequest> quizzes = quizRequest.quizzes();
+        return quizzes.stream()
+                .map(quizRecord -> queryFactory
+                        .selectFrom(answer)
+                        .where(answer.quiz.id.eq(quizRecord.quizId()))
+                        .fetchOne())
+                .collect(Collectors.toList());
+    }
 }

src/main/java/com/goldbalance/dive/domain/article/service/ArticleService.java

@@ -1,15 +1,28 @@
 package com.goldbalance.dive.domain.article.service;
 
+import static com.goldbalance.dive.domain.member.domain.MileageType.*;
+import static com.goldbalance.dive.global.exception.ErrorCode.*;
+
+import com.goldbalance.dive.domain.article.domain.Answer;
 import com.goldbalance.dive.domain.article.domain.Article;
 import com.goldbalance.dive.domain.article.domain.ArticleContent;
 import com.goldbalance.dive.domain.article.domain.Quiz;
 import com.goldbalance.dive.domain.article.dto.ArticleDto;
 import com.goldbalance.dive.domain.article.dto.request.ArticleQueryOption;
+import com.goldbalance.dive.domain.article.dto.request.QuizRecordRequest;
+import com.goldbalance.dive.domain.article.dto.request.QuizRequest;
+import com.goldbalance.dive.domain.article.dto.response.QuizRecordResponse;
+import com.goldbalance.dive.domain.article.dto.response.QuizResult;
+import com.goldbalance.dive.domain.article.repository.AnswerRepository;
 import com.goldbalance.dive.domain.article.repository.ArticleContentRepository;
 import com.goldbalance.dive.domain.article.repository.article.ArticleRepository;
 import com.goldbalance.dive.domain.article.repository.quiz.QuizRepository;
+import com.goldbalance.dive.domain.member.domain.Member;
+import com.goldbalance.dive.domain.member.domain.Mileage;
+import com.goldbalance.dive.domain.member.repository.MemberRepository;
+import com.goldbalance.dive.domain.member.repository.MileageRepository;
 import com.goldbalance.dive.global.exception.CustomException;
-import com.goldbalance.dive.global.exception.ErrorCode;
+import java.util.ArrayList;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
@@ -23,6 +36,9 @@ public class ArticleService {
     private final ArticleRepository articleRepository;
     private final ArticleContentRepository articleContentRepository;
     private final QuizRepository quizRepository;
+    private final AnswerRepository answerRepository;
+    private final MemberRepository memberRepository;
+    private final MileageRepository mileageRepository;
 
     public List<Article> findArticles(ArticleQueryOption queryOption) {
         return articleRepository.searchArticle(queryOption);
@@ -35,8 +51,47 @@ public List<Quiz> findQuizzes(Long articleId) {
     public ArticleDto getArticleContents(String nickname, Long articleId) {
         List<ArticleContent> articleContents = articleContentRepository.findAllByArticleId(articleId);
         if (articleContents.isEmpty()) {
-            throw new CustomException(ErrorCode.ARTICLE_NOT_FOUND);
+            throw new CustomException(ARTICLE_NOT_FOUND);
         }
         return ArticleDto.of(nickname, articleContents);
     }
+
+    public QuizResult gradeQuizzes(Long articleId, QuizRequest quizRequest) {
+        Article article =
+                articleRepository.findById(articleId).orElseThrow(() -> new CustomException(ARTICLE_NOT_FOUND));
+        Member member = memberRepository
+                .findByNickname(quizRequest.nickname())
+                .orElseThrow(() -> new CustomException(MEMBER_NOT_FOUND));
+
+        List<QuizRecordRequest> quizzes = quizRequest.quizzes();
+        long earnedMileages = 0;
+        int correctQuizzes = 0;
+
+        List<QuizRecordResponse> quizRecordResponses = new ArrayList<>();
+        for (QuizRecordRequest q : quizzes) {
+            Answer answer =
+                    answerRepository.findByQuizId(q.quizId()).orElseThrow(() -> new CustomException(ANSWER_NOT_FOUND));
+            if (q.answer().equals(answer.getOptionType())) {
+                earnedMileages += QUIZ_CORRECT.getMileage();
+                correctQuizzes += 1;
+            }
+            quizRecordResponses.add(new QuizRecordResponse(
+                    q.quizId(),
+                    q.number(),
+                    q.answer().getNumber(),
+                    answer.getOptionType().getNumber()));
+        }
+
+        member.addMileages(earnedMileages);
+        Mileage mileage = Mileage.create(member, earnedMileages, QUIZ_CORRECT);
+        mileageRepository.save(mileage);
+
+        return QuizResult.of(
+                member,
+                earnedMileages,
+                quizRecordResponses.size(),
+                correctQuizzes,
+                article.getTitle(),
+                quizRecordResponses);
+    }
 }

src/main/java/com/goldbalance/dive/domain/member/domain/Member.java

@@ -48,4 +48,9 @@ public static Member create(String nickname) {
                 .monthlyMileage(0)
                 .build();
     }
+
+    public void addMileages(long amount) {
+        totalMileage += amount;
+        monthlyMileage += amount;
+    }
 }

src/main/java/com/goldbalance/dive/global/exception/ErrorCode.java

@@ -14,7 +14,8 @@ public enum ErrorCode {
     MEMBER_NOT_FOUND(HttpStatus.NOT_FOUND, "존재하지 않는 멤버입니다."),
 
     // Article
-    ARTICLE_NOT_FOUND(HttpStatus.NOT_FOUND, "존재하지 않는 글입니다.");
+    ARTICLE_NOT_FOUND(HttpStatus.NOT_FOUND, "존재하지 않는 글입니다."),
+    ANSWER_NOT_FOUND(HttpStatus.NOT_FOUND, "존재하지 않는 답안입니다.");
 
     private final HttpStatus status;
     private final String message;