Feat[poll]:투표 항목별 통계 기능 추가

backend/src/main/java/com/ai/lawyer/domain/poll/controller/PollController.java

@@ -2,10 +2,10 @@
 
 import com.ai.lawyer.domain.poll.dto.PollCreateDto;
 import com.ai.lawyer.domain.poll.dto.PollDto;
+import com.ai.lawyer.domain.poll.dto.PollStaticsResponseDto;
 import com.ai.lawyer.domain.poll.dto.PollVoteDto;
 import com.ai.lawyer.domain.poll.entity.PollVote;
 import com.ai.lawyer.domain.poll.entity.PollOptions;
-import com.ai.lawyer.domain.poll.entity.PollStatics;
 import com.ai.lawyer.domain.poll.service.PollService;
 import com.ai.lawyer.domain.post.dto.PostDetailDto;
 import com.ai.lawyer.domain.post.service.PostService;
@@ -54,10 +54,10 @@ public ResponseEntity<ApiResponse<PollVoteDto>> vote(@PathVariable Long pollId,
         return ResponseEntity.ok(new ApiResponse<>(200, "투표가 성공적으로 완료되었습니다.", result));
     }
 
-    @Operation(summary = "투표 통계 조회")
+    @Operation(summary = "투표 통계 조회 (항목별 나이/성별 카운트)")
     @GetMapping("/{pollId}/statics")
-    public ResponseEntity<ApiResponse<List<PollStatics>>> getPollStatics(@PathVariable Long pollId) {
-        List<PollStatics> statics = pollService.getPollStatics(pollId);
+    public ResponseEntity<ApiResponse<PollStaticsResponseDto>> getPollStatics(@PathVariable Long pollId) {
+        PollStaticsResponseDto statics = pollService.getPollStatics(pollId);
         return ResponseEntity.ok(new ApiResponse<>(200, "투표 통계 조회 성공", statics));
     }
 

backend/src/main/java/com/ai/lawyer/domain/poll/dto/PollAgeStaticsDto.java

@@ -0,0 +1,22 @@
+package com.ai.lawyer.domain.poll.dto;
+import lombok.*;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class PollAgeStaticsDto {
+    private Long pollItemsId;
+    private Integer pollOptionIndex;
+    private java.util.List<AgeGroupCountDto> ageGroupCounts;
+
+    @Data
+    @AllArgsConstructor
+    @NoArgsConstructor
+    @Builder
+    public static class AgeGroupCountDto {
+        private String option;
+        private String ageGroup;
+        private Long voteCount;
+    }
+}

backend/src/main/java/com/ai/lawyer/domain/poll/dto/PollForPostDto.java

@@ -0,0 +1,21 @@
+package com.ai.lawyer.domain.poll.dto;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+import java.util.List;
+import java.time.LocalDateTime;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+@Builder
+public class PollForPostDto {
+    @Schema(description = "투표 제목", example = "당신의 선택은?")
+    private String voteTitle;
+    @Schema(description = "투표 항목(2개 필수)", example = "[{\"content\": \"항목1 내용\"}, {\"content\": \"항목2 내용\"}]")
+    private List<PollOptionCreateDto> pollOptions;
+    private LocalDateTime reservedCloseAt;
+}

backend/src/main/java/com/ai/lawyer/domain/poll/dto/PollGenderStaticsDto.java

@@ -0,0 +1,22 @@
+package com.ai.lawyer.domain.poll.dto;
+import lombok.*;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class PollGenderStaticsDto {
+    private Long pollItemsId;
+    private Integer pollOptionIndex;
+    private java.util.List<GenderCountDto> genderCounts;
+
+    @Data
+    @AllArgsConstructor
+    @NoArgsConstructor
+    @Builder
+    public static class GenderCountDto {
+        private String option;
+        private String gender;
+        private Long voteCount;
+    }
+}

backend/src/main/java/com/ai/lawyer/domain/poll/dto/PollStaticsResponseDto.java

@@ -0,0 +1,15 @@
+package com.ai.lawyer.domain.poll.dto;
+
+import lombok.*;
+import java.util.List;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class PollStaticsResponseDto {
+    private Long postId;
+    private Long pollId;
+    private List<PollAgeStaticsDto> optionAgeStatics;
+    private List<PollGenderStaticsDto> optionGenderStatics;
+}

backend/src/main/java/com/ai/lawyer/domain/poll/repository/PollStaticsRepository.java

@@ -8,3 +8,4 @@
 public interface PollStaticsRepository extends JpaRepository<PollStatics, Long> {
     List<PollStatics> findByPoll_PollId(Long pollId);
 }
+

backend/src/main/java/com/ai/lawyer/domain/poll/repository/PollVoteRepository.java

@@ -25,4 +25,29 @@ public interface PollVoteRepository extends JpaRepository<PollVote, Long> {
     java.util.List<Object[]> countStaticsByPollOptionIds(@Param("pollOptionIds") java.util.List<Long> pollOptionIds);
 
     boolean existsByPoll_PollIdAndMember_MemberId(Long pollId, Long memberId);
+
+    @Query(value = "SELECT po.option, m.gender, COUNT(*) FROM poll_vote pv JOIN poll_options po ON pv.poll_items_id = po.poll_items_id JOIN member m ON pv.member_id = m.member_id WHERE po.poll_id = :pollId GROUP BY po.option, m.gender", nativeQuery = true)
+    List<Object[]> getGenderOptionStatics(@Param("pollId") Long pollId);
+
+    @Query(value = "SELECT CASE WHEN m.age < 20 THEN '10대' WHEN m.age < 30 THEN '20대' " +
+            "WHEN m.age < 40 THEN '30대' WHEN m.age < 50 THEN '40대' WHEN m.age < 60 THEN '50대' " +
+            "WHEN m.age < 70 THEN '60대' WHEN m.age < 80 THEN '70대' ELSE '80대 이상' " +
+            "END AS ageGroup, m.gender, COUNT(*) FROM poll_vote pv JOIN member m ON pv.member_id = m.member_id JOIN poll_options po ON pv.poll_items_id = po.poll_items_id WHERE po.poll_id = :pollId GROUP BY ageGroup, m.gender", nativeQuery = true)
+    List<Object[]> getAgeGenderStatics(@Param("pollId") Long pollId);
+
+    @Query("SELECT o.option, " +
+           "CASE WHEN m.age < 20 THEN '10대' WHEN m.age < 30 THEN '20대' " +
+           "WHEN m.age < 40 THEN '30대' WHEN m.age < 50 THEN '40대' WHEN m.age < 60 THEN '50대' " +
+           "WHEN m.age < 70 THEN '60대' WHEN m.age < 80 THEN '70대' ELSE '80대 이상' END, " +
+           "COUNT(v) " +
+           "FROM PollVote v JOIN v.pollOptions o JOIN v.member m " +
+           "WHERE o.poll.pollId = :pollId " +
+           "GROUP BY o.option, " +
+           "CASE WHEN m.age < 20 THEN '10대' WHEN m.age < 30 THEN '20대' " +
+           "WHEN m.age < 40 THEN '30대' WHEN m.age < 50 THEN '40대' WHEN m.age < 60 THEN '50대' " +
+           "WHEN m.age < 70 THEN '60대' WHEN m.age < 80 THEN '70대' ELSE '80대 이상' END")
+    List<Object[]> getOptionAgeStatics(@Param("pollId") Long pollId);
+
+    @Query("SELECT o.option, m.gender, COUNT(v) FROM PollVote v JOIN v.pollOptions o JOIN v.member m WHERE o.poll.pollId = :pollId GROUP BY o.option, m.gender")
+    List<Object[]> getOptionGenderStatics(@Param("pollId") Long pollId);
 }

backend/src/main/java/com/ai/lawyer/domain/poll/service/PollService.java

@@ -7,23 +7,36 @@
 import com.ai.lawyer.domain.poll.entity.PollVote;
 import com.ai.lawyer.domain.poll.entity.PollStatics;
 import com.ai.lawyer.domain.poll.entity.PollOptions;
+import com.ai.lawyer.domain.poll.dto.PollForPostDto;
+import com.ai.lawyer.domain.poll.dto.PollStaticsResponseDto;
 
 import java.util.List;
 
 public interface PollService {
+    // ===== 조회 관련 =====
     PollDto getPoll(Long pollId);
+    PollDto getPollWithStatistics(Long pollId);
     List<PollOptions> getPollOptions(Long pollId);
-    PollVoteDto vote(Long pollId, Long pollItemsId, Long memberId);
-    List<PollStatics> getPollStatics(Long pollId);
-    void closePoll(Long pollId);
-    void deletePoll(Long pollId);
+    List<PollDto> getPollsByStatus(PollDto.PollStatus status);
     PollDto getTopPollByStatus(PollDto.PollStatus status);
+    List<PollDto> getTopNPollsByStatus(PollDto.PollStatus status, int n);
+
+    // ===== 통계 관련 =====
+    PollStaticsResponseDto getPollStatics(Long pollId);
     Long getVoteCountByPollId(Long pollId);
     Long getVoteCountByPostId(Long postId);
-    PollDto updatePoll(Long pollId, PollUpdateDto pollUpdateDto);
-    PollDto getPollWithStatistics(Long pollId);
+
+    // ===== 투표 관련 =====
+    PollVoteDto vote(Long pollId, Long pollItemsId, Long memberId);
+
+    // ===== 생성/수정/삭제 관련 =====
     PollDto createPoll(PollCreateDto request, Long memberId);
+    PollDto updatePoll(Long pollId, PollUpdateDto pollUpdateDto);
     void patchUpdatePoll(Long pollId, PollUpdateDto pollUpdateDto);
-    List<PollDto> getPollsByStatus(PollDto.PollStatus status);
-    List<PollDto> getTopNPollsByStatus(PollDto.PollStatus status, int n);
+    void closePoll(Long pollId);
+    void deletePoll(Long pollId);
+
+    // ===== 검증 관련 =====
+    void validatePollCreate(PollCreateDto dto);
+    void validatePollCreate(PollForPostDto dto);
 }