Merge pull request #9 from DevKor-github/dev

feat: get /participants/{id}/choices 구현

Author: eastlight82

src/main/java/com/workingdead/meet/controller/ParticipantController.java

@@ -158,4 +158,23 @@ public ResponseEntity<ParticipantDtos.ParticipantScheduleRes> submitSchedule(
             participantService.submitSchedule(participantId, request);
         return ResponseEntity.ok(response);
     }
+
+    @Operation(
+            summary = "참여자의 선택 정보 조회",
+            description = "특정 참여자가 선택한 일정과 우선순위를 조회합니다."
+    )
+    @ApiResponses({
+            @ApiResponse(responseCode = "200", description = "조회 성공",
+                    content = @Content(schema = @Schema(implementation = ParticipantDtos.ParticipantChoicesRes.class))),
+            @ApiResponse(responseCode = "404", description = "참여자를 찾을 수 없음", content = @Content)
+    })
+    @GetMapping("/participants/{participantId}/choices")
+    public ResponseEntity<ParticipantDtos.ParticipantChoicesRes> getParticipantChoices(
+            @PathVariable Long participantId) {
+
+        ParticipantDtos.ParticipantChoicesRes response =
+                participantService.getParticipantChoices(participantId);
+
+        return ResponseEntity.ok(response);
+    }
 }

src/main/java/com/workingdead/meet/dto/ParticipantDtos.java

@@ -62,5 +62,36 @@ public record PriorityRes(
             int priorityIndex,
             double weight
     ) {}
+
+    /**
+     * 참여자의 선택 정보 조회 응답
+     */
+    public record ParticipantChoicesRes(
+            Long participantId,
+            String displayName,
+            List<SelectionInfo> selections,
+            List<PriorityInfo> priorities
+    ) {}
+
+    /**
+     * 일정 선택 정보
+     */
+    public record SelectionInfo(
+            Long id,
+            String date,
+            String period,
+            boolean selected
+    ) {}
+
+    /**
+     * 우선순위 정보
+     */
+    public record PriorityInfo(
+            Long id,
+            String date,
+            String period,
+            Integer priorityIndex,
+            Double weight
+    ) {}
 }
 

src/main/java/com/workingdead/meet/service/ParticipantService.java

@@ -165,4 +165,43 @@ private String genCode(int len) {
         for (int i=0;i<len;i++) sb.append(CODE_ALPHABET.charAt(rnd.nextInt(CODE_ALPHABET.length())));
         return sb.toString();
     }
+
+    /**
+     * 특정 참여자의 선택한 일정과 우선순위 조회 (participantId만 사용)
+     */
+    public ParticipantDtos.ParticipantChoicesRes getParticipantChoices(Long participantId) {
+
+        // 참여자 존재 확인 및 조회
+        Participant participant = participantRepo.findById(participantId)
+                .orElseThrow(() -> new RuntimeException("Participant not found"));
+
+        // 일정 선택 정보 조회 (엔티티 관계 활용)
+        List<ParticipantDtos.SelectionInfo> selectionInfos = participant.getSelections().stream()
+                .map(s -> new ParticipantDtos.SelectionInfo(
+                        s.getId(),
+                        s.getDate().toString(),
+                        s.getPeriod(),
+                        s.isSelected()
+                ))
+                .toList();
+
+        // 우선순위 정보 조회 (엔티티 관계 활용)
+        List<ParticipantDtos.PriorityInfo> priorityInfos = participant.getPriorities().stream()
+                .map(p -> new ParticipantDtos.PriorityInfo(
+                        p.getId(),
+                        p.getDate().toString(),
+                        p.getPeriod(),
+                        p.getPriorityIndex(),
+                        p.getWeight()
+                ))
+                .sorted((p1, p2) -> p1.priorityIndex().compareTo(p2.priorityIndex()))
+                .toList();
+
+        return new ParticipantDtos.ParticipantChoicesRes(
+                participant.getId(),
+                participant.getDisplayName(),
+                selectionInfos,
+                priorityInfos
+        );
+    }
 }