feat: 유의미한 회고를 주기적으로 작성하는 사용자의 비율 조회 구현 (#384)

* feat: 유의미한 회고를 주기적으로 작성하는 사용자의 비율 조회 구현

* chore: 쿼리 사용 단순하게 변경

Author: mikekks

layer-admin/src/main/java/org/layer/admin/retrospect/controller/AdminRetrospectController.java

@@ -3,6 +3,7 @@
 import java.time.LocalDateTime;
 import java.util.List;
 
+import org.layer.admin.retrospect.controller.dto.MeaningfulRetrospectMemberResponse;
 import org.layer.admin.retrospect.controller.dto.RetrospectStayTimeResponse;
 import org.layer.admin.retrospect.service.AdminRetrospectService;
 import org.springframework.http.ResponseEntity;
@@ -28,4 +29,17 @@ public ResponseEntity<List<RetrospectStayTimeResponse>> getAllRetrospectStayTime
 
 		return ResponseEntity.ok().body(responses);
 	}
+
+	@GetMapping("/admin/retrospect/meaningful")
+	public ResponseEntity<MeaningfulRetrospectMemberResponse> getAllMeaningfulRetrospect(
+		@RequestParam(name = "startDate") LocalDateTime startDate,
+		@RequestParam(name = "endDate") LocalDateTime endDate,
+		@RequestParam(name = "retrospectLength") int retrospectLength,
+		@RequestParam(name = "retrospectCount") int retrospectCount) {
+
+		MeaningfulRetrospectMemberResponse response = adminRetrospectService.getAllMeaningfulRetrospect(
+			startDate, endDate, retrospectLength, retrospectCount);
+
+		return ResponseEntity.ok().body(response);
+	}
 }

layer-admin/src/main/java/org/layer/admin/retrospect/controller/dto/MeaningfulRetrospectMemberResponse.java

@@ -0,0 +1,7 @@
+package org.layer.admin.retrospect.controller.dto;
+
+public record MeaningfulRetrospectMemberResponse(
+	long meaningfulMemberCount,
+	long totalMemberCount
+) {
+}

layer-admin/src/main/java/org/layer/admin/retrospect/repository/AdminRetrospectRepository.java

@@ -6,14 +6,30 @@
 
 import org.layer.admin.retrospect.entity.AdminRetrospectAnswerHistory;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.query.Param;
 
 public interface AdminRetrospectRepository extends JpaRepository<AdminRetrospectAnswerHistory, Long> {
 
 	Optional<AdminRetrospectAnswerHistory> findTopByMemberIdAndSpaceIdAndRetrospectIdOrderByAnswerStartTimeDesc(
 		Long memberId, Long spaceId, Long retrospectId);
 
-	List<AdminRetrospectAnswerHistory> findAllByEventTimeBetween(
+	@Query("""
+    SELECT a.memberId
+    FROM AdminRetrospectAnswerHistory a
+    WHERE LENGTH(a.answerContent) >= :minLength
+      AND a.eventTime BETWEEN :start AND :end
+    GROUP BY a.memberId
+    HAVING COUNT(a) >= :minCount
+	""")
+	List<Long> findMeaningfulMemberIds(
+		@Param("start") LocalDateTime start,
+		@Param("end") LocalDateTime end,
+		@Param("minLength") int minLength,
+		@Param("minCount") int minCount);
+
+	// 엣지 케이스로 답변 종료시간이 없는 경우도 있을 수 있기에 필터링한다.
+	List<AdminRetrospectAnswerHistory> findAllByEventTimeBetweenAndAnswerEndTimeIsNotNull(
 		LocalDateTime startTime, LocalDateTime endTime);
 
 	void deleteByMemberIdAndSpaceIdAndRetrospectId(

layer-admin/src/main/java/org/layer/admin/retrospect/service/AdminRetrospectService.java

@@ -8,6 +8,8 @@
 import java.util.List;
 import java.util.Map;
 
+import org.layer.admin.member.repository.AdminMemberRepository;
+import org.layer.admin.retrospect.controller.dto.MeaningfulRetrospectMemberResponse;
 import org.layer.admin.retrospect.controller.dto.RetrospectStayTimeResponse;
 import org.layer.admin.retrospect.entity.AdminRetrospectAnswerHistory;
 import org.layer.admin.retrospect.enums.AnswerTimeRange;
@@ -25,10 +27,21 @@
 public class AdminRetrospectService {
 
 	private final AdminRetrospectRepository adminRetrospectRepository;
+	private final AdminMemberRepository adminMemberRepository;
+
+	public MeaningfulRetrospectMemberResponse getAllMeaningfulRetrospect(
+		LocalDateTime startTime, LocalDateTime endTime, int retrospectLength, int retrospectCount) {
+		List<Long> meaningfulMemberIds = adminRetrospectRepository.findMeaningfulMemberIds(
+			startTime, endTime, retrospectLength, retrospectCount);
+
+		long totalMemberCount = adminMemberRepository.count();
+
+		return new MeaningfulRetrospectMemberResponse(meaningfulMemberIds.size(), totalMemberCount);
+	}
 
 	public List<RetrospectStayTimeResponse> getAllRetrospectStayTime(
 		LocalDateTime startTime, LocalDateTime endTime) {
-		List<AdminRetrospectAnswerHistory> retrospectAnswerHistories = adminRetrospectRepository.findAllByEventTimeBetween(
+		List<AdminRetrospectAnswerHistory> retrospectAnswerHistories = adminRetrospectRepository.findAllByEventTimeBetweenAndAnswerEndTimeIsNotNull(
 			startTime, endTime);
 
 		Map<AnswerTimeRange, Long> countMap = new HashMap<>();