[BE] feat: 받은 리뷰 요약 조회 API 구현

backend/src/main/java/reviewme/review/controller/ReviewController.java

@@ -26,8 +26,6 @@
 @RequiredArgsConstructor
 public class ReviewController {
 
-    private static final String GROUP_ACCESS_CODE_HEADER = "GroupAccessCode";
-
     private final ReviewRegisterService reviewRegisterService;
     private final ReviewListLookupService reviewListLookupService;
     private final ReviewDetailLookupService reviewDetailLookupService;

backend/src/main/java/reviewme/review/repository/ReviewRepository.java

@@ -38,4 +38,6 @@ AND CAST(r.created_at AS DATE) <= :createdDate
     default boolean existsOlderReviewInGroup(long reviewGroupId, long reviewId, LocalDate createdDate) {
         return existsOlderReviewInGroupInLong(reviewGroupId, reviewId, createdDate) > 0;
     }
+
+    int countByReviewGroupId(long reviewGroupId);
 }

backend/src/main/java/reviewme/review/service/ReviewSummaryService.java

@@ -1,12 +1,32 @@
 package reviewme.review.service;
 
+import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import reviewme.review.repository.ReviewRepository;
 import reviewme.review.service.dto.response.list.ReceivedReviewsSummaryResponse;
+import reviewme.review.service.exception.ReviewGroupNotFoundByReviewRequestCodeException;
+import reviewme.reviewgroup.domain.ReviewGroup;
+import reviewme.reviewgroup.repository.ReviewGroupRepository;
 
 @Service
+@RequiredArgsConstructor
 public class ReviewSummaryService {
 
+    private final ReviewGroupRepository reviewGroupRepository;
+    private final ReviewRepository reviewRepository;
+
+    @Transactional(readOnly = true)
     public ReceivedReviewsSummaryResponse getReviewSummary(String reviewRequestCode) {
-        return null;
+        ReviewGroup reviewGroup = reviewGroupRepository.findByReviewRequestCode(reviewRequestCode)
+                .orElseThrow(() -> new ReviewGroupNotFoundByReviewRequestCodeException(reviewRequestCode));
+
+        int totalReviewCount = reviewRepository.countByReviewGroupId(reviewGroup.getId());
+
+        return new ReceivedReviewsSummaryResponse(
+                reviewGroup.getProjectName(),
+                reviewGroup.getReviewee(),
+                totalReviewCount
+        );
     }
 }

backend/src/test/java/reviewme/review/service/ReviewSummaryServiceTest.java

@@ -0,0 +1,88 @@
+package reviewme.review.service;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.jupiter.api.Assertions.assertAll;
+import static reviewme.fixture.QuestionFixture.서술형_필수_질문;
+import static reviewme.fixture.ReviewGroupFixture.리뷰_그룹;
+import static reviewme.fixture.SectionFixture.항상_보이는_섹션;
+import static reviewme.fixture.TemplateFixture.템플릿;
+
+import java.util.List;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import reviewme.question.domain.Question;
+import reviewme.question.repository.QuestionRepository;
+import reviewme.review.domain.Review;
+import reviewme.review.repository.ReviewRepository;
+import reviewme.review.service.dto.response.list.ReceivedReviewsSummaryResponse;
+import reviewme.review.service.exception.ReviewGroupNotFoundByReviewRequestCodeException;
+import reviewme.reviewgroup.domain.ReviewGroup;
+import reviewme.reviewgroup.repository.ReviewGroupRepository;
+import reviewme.support.ServiceTest;
+import reviewme.template.domain.Section;
+import reviewme.template.domain.Template;
+import reviewme.template.repository.SectionRepository;
+import reviewme.template.repository.TemplateRepository;
+
+@ServiceTest
+class ReviewSummaryServiceTest {
+
+    @Autowired
+    private ReviewSummaryService reviewSummaryService;
+
+    @Autowired
+    private ReviewGroupRepository reviewGroupRepository;
+
+    @Autowired
+    private ReviewRepository reviewRepository;
+
+    @Autowired
+    private TemplateRepository templateRepository;
+
+    @Autowired
+    private SectionRepository sectionRepository;
+
+    @Autowired
+    private QuestionRepository questionRepository;
+
+    @Test
+    void 리뷰_그룹에_등록된_리뷰_요약_정보를_반환한다() {
+        // given
+        Question question = questionRepository.save(서술형_필수_질문());
+        Section section = sectionRepository.save(항상_보이는_섹션(List.of(question.getId())));
+        Template template = templateRepository.save(템플릿(List.of(section.getId())));
+
+        ReviewGroup reviewGroup1 = reviewGroupRepository.save(리뷰_그룹());
+        ReviewGroup reviewGroup2 = reviewGroupRepository.save(리뷰_그룹("reReCo", "groupCo"));
+
+        List<Review> reviews = List.of(
+                new Review(template.getId(), reviewGroup1.getId(), List.of()),
+                new Review(template.getId(), reviewGroup1.getId(), List.of()),
+                new Review(template.getId(), reviewGroup1.getId(), List.of())
+        );
+        reviewRepository.saveAll(reviews);
+        reviewRepository.save(new Review(template.getId(), reviewGroup2.getId(), List.of()));
+
+        // when
+        ReceivedReviewsSummaryResponse actual = reviewSummaryService.getReviewSummary(
+                reviewGroup1.getReviewRequestCode());
+        // then
+        assertAll(
+                () -> assertThat(actual.projectName()).isEqualTo(reviewGroup1.getProjectName()),
+                () -> assertThat(actual.revieweeName()).isEqualTo(reviewGroup1.getReviewee()),
+                () -> assertThat(actual.totalReviewCount()).isEqualTo(reviews.size())
+        );
+    }
+
+    @Test
+    void 리뷰_요약_정보_조회시_리뷰_요청_코드가_존재하지_않는_경우_예외가_발생한다() {
+        // given
+        ReviewGroup reviewGroup = reviewGroupRepository.save(리뷰_그룹());
+
+        // when, then
+        assertThatThrownBy(() -> reviewSummaryService.getReviewSummary(
+                reviewGroup.getReviewRequestCode() + "wrong"))
+                .isInstanceOf(ReviewGroupNotFoundByReviewRequestCodeException.class);
+    }
+}