[BE] feat: 리뷰 폼 응답 재구현

backend/src/main/java/reviewme/template/controller/TemplateController.java

@@ -16,7 +16,7 @@ public class TemplateController {
 
     @GetMapping("/reviews/write")
     public ResponseEntity<TemplateResponse> findReviewTemplate(@RequestParam String reviewRequestCode) {
-        TemplateResponse response = templateService.findDefaultTemplate();
+        TemplateResponse response = templateService.findDefaultTemplate(reviewRequestCode);
         return ResponseEntity.ok(response);
     }
 }

backend/src/main/java/reviewme/template/domain/exception/NoRegisteredTemplatesException.java

@@ -0,0 +1,13 @@
+package reviewme.template.domain.exception;
+
+import lombok.extern.slf4j.Slf4j;
+import reviewme.global.exception.NotFoundException;
+
+@Slf4j
+public class NoRegisteredTemplatesException extends NotFoundException {
+
+    public NoRegisteredTemplatesException() {
+        super("서버 내부에서 문제가 발생했어요. 서버에 문의해주세요.");
+        log.warn("NoRegisteredTemplatesException is occurred");
+    }
+}

backend/src/main/java/reviewme/template/service/TemplateService.java

@@ -0,0 +1,32 @@
+package reviewme.template.service;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import reviewme.review.domain.exception.ReviewGroupNotFoundByRequestReviewCodeException;
+import reviewme.reviewgroup.domain.ReviewGroup;
+import reviewme.reviewgroup.repository.ReviewGroupRepository;
+import reviewme.template.domain.Template;
+import reviewme.template.domain.exception.NoRegisteredTemplatesException;
+import reviewme.template.dto.response.TemplateResponse;
+import reviewme.template.repository.TemplateRepository;
+
+@Service
+@RequiredArgsConstructor
+public class TemplateService {
+
+    private final ReviewGroupRepository reviewGroupRepository;
+    private final TemplateRepository templateRepository;
+    private final TemplateMapper templateMapper;
+
+    @Transactional
+    public TemplateResponse findDefaultTemplate(String reviewRequestCode) {
+        ReviewGroup reviewGroup = reviewGroupRepository.findByReviewRequestCode(reviewRequestCode)
+                .orElseThrow(() -> new ReviewGroupNotFoundByRequestReviewCodeException(reviewRequestCode));
+
+        Template defaultTemplate = templateRepository.findTopByOrderByIdDesc()
+                .orElseThrow(NoRegisteredTemplatesException::new);
+
+        return templateMapper.mapToTemplateResponse(reviewGroup, defaultTemplate);
+    }
+}