Merge pull request #78 from SynergyX-AI-Pattern/feat/#77_add_pattern_list_recent_backtests

Feat/#77 add pattern list recent backtests

Author: Soomxn

src/main/java/com/synergyx/trading/dto/pattern/PatternResponseDTO.java

@@ -18,6 +18,19 @@ public static class PatternDTO {
         private Long patternId; // 패턴 아이디
         private String patternName; // 패턴 이름
         private List<Double> points; // 좌표
+        private List<BacktestSummaryDTO> recentBacktestResults; // 최근 백테스트 결과
+    }
+    // 최근 백테스트 결과 (목록 조회용)
+    @Getter
+    @Builder
+    @AllArgsConstructor
+    @NoArgsConstructor
+    public static class BacktestSummaryDTO {
+        private String stockName; // 종목 이름
+        private Double averageReturn; // 평균 수익률
+        private Double winRate; // 승률
+        private Integer matchedCount; // 패턴 매칭 횟수
+        private LocalDate executedAt; // 백테스팅 실행 날짜
     }
     // 패턴 상세 조회
     @Getter

src/main/java/com/synergyx/trading/model/Pattern.java

@@ -26,7 +26,7 @@ public class Pattern extends BaseEntity {
     private User user;
 
     // 적용된 종목 목록
-    @OneToMany(mappedBy = "pattern")
+    @OneToMany(mappedBy = "pattern", cascade = CascadeType.REMOVE, orphanRemoval = true)
     private List<PatternApply> patternApplies;
 
     @Column(name = "pattern_name", nullable = false)

src/main/java/com/synergyx/trading/repository/BacktestRepository.java

@@ -7,6 +7,8 @@
 import org.springframework.stereotype.Repository;
 
 import org.springframework.data.domain.Pageable;
+
+import java.util.List;
 import java.util.Optional;
 
 @Repository
@@ -27,4 +29,7 @@ Optional<Backtest> findTop1ByPatternIdAndStockIdAndUserIdOrderByExecutedAtDesc(
             Long stockId,
             Long userId
     );
+
+    // 특정 패턴에 대한 최근 3개 백테스트 조회 (패턴 목록 조회용)
+    List<Backtest> findTop3ByPatternIdAndUserIdOrderByExecutedAtDescIdDesc(Long patternId, Long userId);
 }

src/main/java/com/synergyx/trading/service/patternService/PatternQueryServiceImpl.java

@@ -13,7 +13,6 @@
 
 import java.util.List;
 import java.util.Optional;
-import java.util.stream.Collectors;
 
 @Service
 @RequiredArgsConstructor
@@ -30,16 +29,31 @@ public class PatternQueryServiceImpl implements PatternQueryService {
     public List<PatternResponseDTO.PatternDTO> getPatternList(Long userId) {
 
         // 유저 존재 여부 확인
-        User user = userRepository.findById(userId)
-                .orElseThrow(() -> new GeneralException(ErrorStatus.USER_NOT_FOUND));
+        if (!userRepository.existsById(userId)) {
+            throw new GeneralException(ErrorStatus.USER_NOT_FOUND);
+        }
 
         return patternRepository.findByUserId(userId).stream()
-                .map(p -> new PatternResponseDTO.PatternDTO(
-                        p.getId(),
-                        p.getPatternName(),
-                        p.getPoints()
-                ))
-                .collect(Collectors.toList());
+                .map(pattern -> {
+                    // 최근 백테스트 결과 최대 3개 조회
+                    List<Backtest> backtests = backtestRepository.findTop3ByPatternIdAndUserIdOrderByExecutedAtDescIdDesc(pattern.getId(), userId);
+                    List<PatternResponseDTO.BacktestSummaryDTO> summaries = backtests.stream()
+                            .map(b -> PatternResponseDTO.BacktestSummaryDTO.builder()
+                                    .stockName(b.getStock().getName())
+                                    .averageReturn(b.getAverageReturn())
+                                    .winRate(b.getWinRate())
+                                    .matchedCount(b.getMatchedCount())
+                                    .executedAt(b.getExecutedAt())
+                                    .build())
+                            .toList();
+                    return PatternResponseDTO.PatternDTO.builder()
+                            .patternId(pattern.getId())
+                            .patternName(pattern.getPatternName())
+                            .points(pattern.getPoints())
+                            .recentBacktestResults(summaries)
+                            .build();
+                })
+                .toList();
     }
 
     // 패턴 상세 조회
@@ -48,8 +62,9 @@ public List<PatternResponseDTO.PatternDTO> getPatternList(Long userId) {
     public PatternResponseDTO.PatternDetailDTO getPatternDetail(Long userId, Long patternId) {
 
         // 유저 존재 여부 확인
-        User user = userRepository.findById(userId)
-                .orElseThrow(() -> new GeneralException(ErrorStatus.USER_NOT_FOUND));
+        if (!userRepository.existsById(userId)) {
+            throw new GeneralException(ErrorStatus.USER_NOT_FOUND);
+        }
 
         // 패턴 존재 여부 확인
         Pattern pattern = patternRepository.findById(patternId)