feat(report): 피드 공유 기능 구현

src/main/java/com/devkor/ifive/nadab/domain/dailyreport/api/FeedController.java

@@ -0,0 +1,159 @@
+package com.devkor.ifive.nadab.domain.dailyreport.api;
+
+import com.devkor.ifive.nadab.domain.dailyreport.api.dto.response.FeedListResponse;
+import com.devkor.ifive.nadab.domain.dailyreport.api.dto.response.ShareStatusResponse;
+import com.devkor.ifive.nadab.domain.dailyreport.application.FeedQueryService;
+import com.devkor.ifive.nadab.domain.dailyreport.application.FeedService;
+import com.devkor.ifive.nadab.global.core.response.ApiResponseDto;
+import com.devkor.ifive.nadab.global.core.response.ApiResponseEntity;
+import com.devkor.ifive.nadab.global.security.principal.UserPrincipal;
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.media.Content;
+import io.swagger.v3.oas.annotations.media.Schema;
+import io.swagger.v3.oas.annotations.responses.ApiResponse;
+import io.swagger.v3.oas.annotations.security.SecurityRequirement;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.access.prepost.PreAuthorize;
+import org.springframework.security.core.annotation.AuthenticationPrincipal;
+import org.springframework.web.bind.annotation.*;
+
+@Tag(name = "피드 API", description = "친구 피드 공유 및 조회 관련 API")
+@RestController
+@RequestMapping("${api_prefix}/feed")
+@RequiredArgsConstructor
+public class FeedController {
+
+    private final FeedService feedService;
+    private final FeedQueryService feedQueryService;
+
+    @PostMapping("/share")
+    @PreAuthorize("isAuthenticated()")
+    @Operation(
+            summary = "공유 시작 API",
+            description = "당일 DailyReport를 친구들에게 공유합니다.",
+            security = @SecurityRequirement(name = "bearerAuth"),
+            responses = {
+                    @ApiResponse(
+                            responseCode = "204",
+                            description = "공유 시작 성공",
+                            content = @Content
+                    ),
+                    @ApiResponse(
+                            responseCode = "401",
+                            description = "인증 실패",
+                            content = @Content
+                    ),
+                    @ApiResponse(
+                            responseCode = "404",
+                            description = "ErrorCode: DAILY_REPORT_NOT_FOUND - 당일 리포트를 찾을 수 없음",
+                            content = @Content
+                    )
+            }
+    )
+    public ResponseEntity<ApiResponseDto<Void>> startSharing(
+            @AuthenticationPrincipal UserPrincipal principal
+    ) {
+        feedService.startSharing(principal.getId());
+        return ApiResponseEntity.noContent();
+    }
+
+    @PostMapping("/unshare")
+    @PreAuthorize("isAuthenticated()")
+    @Operation(
+            summary = "공유 중단 API",
+            description = "당일 DailyReport 공유를 중단합니다.",
+            security = @SecurityRequirement(name = "bearerAuth"),
+            responses = {
+                    @ApiResponse(
+                            responseCode = "204",
+                            description = "공유 중단 성공",
+                            content = @Content
+                    ),
+                    @ApiResponse(
+                            responseCode = "401",
+                            description = "인증 실패",
+                            content = @Content
+                    ),
+                    @ApiResponse(
+                            responseCode = "404",
+                            description = "ErrorCode: DAILY_REPORT_NOT_FOUND - 당일 리포트를 찾을 수 없음",
+                            content = @Content
+                    )
+            }
+    )
+    public ResponseEntity<ApiResponseDto<Void>> stopSharing(
+            @AuthenticationPrincipal UserPrincipal principal
+    ) {
+        feedService.stopSharing(principal.getId());
+        return ApiResponseEntity.noContent();
+    }
+
+    @GetMapping("/share/status")
+    @PreAuthorize("isAuthenticated()")
+    @Operation(
+            summary = "공유 상태 조회 API",
+            description = """
+                    당일 DailyReport의 공유 상태를 조회합니다.
+
+                    이 API는 상세보기 화면에서 오늘 날짜 답변일 때 공유 버튼 상태를 확인하기 위해 사용됩니다.
+                    """,
+            security = @SecurityRequirement(name = "bearerAuth"),
+            responses = {
+                    @ApiResponse(
+                            responseCode = "200",
+                            description = "조회 성공",
+                            content = @Content(
+                                    schema = @Schema(implementation = ShareStatusResponse.class),
+                                    mediaType = "application/json"
+                            )
+                    ),
+                    @ApiResponse(
+                            responseCode = "401",
+                            description = "인증 실패",
+                            content = @Content
+                    ),
+                    @ApiResponse(
+                            responseCode = "404",
+                            description = "ErrorCode: DAILY_REPORT_NOT_FOUND - 당일 리포트를 찾을 수 없음",
+                            content = @Content
+                    )
+            }
+    )
+    public ResponseEntity<ApiResponseDto<ShareStatusResponse>> getShareStatus(
+            @AuthenticationPrincipal UserPrincipal principal
+    ) {
+        ShareStatusResponse response = feedQueryService.getShareStatus(principal.getId());
+        return ApiResponseEntity.ok(response);
+    }
+
+    @GetMapping
+    @PreAuthorize("isAuthenticated()")
+    @Operation(
+            summary = "피드 조회 API",
+            description = "친구들의 공유된 DailyReport 목록을 조회합니다. ACCEPTED 상태의 친구만 조회됩니다.",
+            security = @SecurityRequirement(name = "bearerAuth"),
+            responses = {
+                    @ApiResponse(
+                            responseCode = "200",
+                            description = "피드 조회 성공",
+                            content = @Content(
+                                    schema = @Schema(implementation = FeedListResponse.class),
+                                    mediaType = "application/json"
+                            )
+                    ),
+                    @ApiResponse(
+                            responseCode = "401",
+                            description = "인증 실패",
+                            content = @Content
+                    )
+            }
+    )
+    public ResponseEntity<ApiResponseDto<FeedListResponse>> getFeeds(
+            @AuthenticationPrincipal UserPrincipal principal
+    ) {
+        FeedListResponse response = feedQueryService.getFeeds(principal.getId());
+        return ApiResponseEntity.ok(response);
+    }
+}

src/main/java/com/devkor/ifive/nadab/domain/dailyreport/api/dto/response/DailyReportResponse.java

@@ -12,6 +12,9 @@ public record DailyReportResponse(
         String content,
 
         @Schema(description = "오늘의 리포트 감정 상태", example = "GROWTH")
-        String emotion
+        String emotion,
+
+        @Schema(description = "피드 공유 상태", example = "false")
+        Boolean isShared
 ) {
 }

src/main/java/com/devkor/ifive/nadab/domain/dailyreport/api/dto/response/FeedListResponse.java

@@ -0,0 +1,12 @@
+package com.devkor.ifive.nadab.domain.dailyreport.api.dto.response;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import java.util.List;
+
+@Schema(description = "피드 목록 응답")
+public record FeedListResponse(
+
+        @Schema(description = "피드 목록")
+        List<FeedResponse> feeds
+) {
+}

src/main/java/com/devkor/ifive/nadab/domain/dailyreport/api/dto/response/FeedResponse.java

@@ -0,0 +1,26 @@
+package com.devkor.ifive.nadab.domain.dailyreport.api.dto.response;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+@Schema(description = "피드 응답")
+public record FeedResponse(
+
+        @Schema(description = "친구 닉네임", example = "모래")
+        String friendNickname,
+
+        @Schema(description = "친구 프로필 이미지 URL", example = "https://cdn.example.com/profiles/abc123.png")
+        String friendProfileImageUrl,
+
+        @Schema(description = "관심분야 코드", example = "EMOTION")
+        String interestCode,
+
+        @Schema(description = "질문 내용", example = "오늘 가장 기뻤던 순간은?")
+        String questionText,
+
+        @Schema(description = "답변 내용", example = "집에 갈 때")
+        String answer,
+
+        @Schema(description = "감정 코드", example = "ACHIEVEMENT")
+        String emotionCode
+) {
+}

src/main/java/com/devkor/ifive/nadab/domain/dailyreport/api/dto/response/ShareStatusResponse.java

@@ -0,0 +1,11 @@
+package com.devkor.ifive.nadab.domain.dailyreport.api.dto.response;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+@Schema(description = "피드 공유 상태 응답")
+public record ShareStatusResponse(
+
+        @Schema(description = "오늘의 기록 공유 상태", example = "true")
+        Boolean isShared
+) {
+}

src/main/java/com/devkor/ifive/nadab/domain/dailyreport/application/DailyReportQueryService.java

@@ -40,7 +40,8 @@ public DailyReportResponse getDailyReport(Long id) {
         return new DailyReportResponse(
                 entry.getContent(),
                 report.getContent(),
-                report.getEmotion().getCode().toString()
+                report.getEmotion().getCode().toString(),
+                report.getIsShared()
         );
     }
 }

src/main/java/com/devkor/ifive/nadab/domain/dailyreport/application/FeedQueryService.java

@@ -0,0 +1,90 @@
+package com.devkor.ifive.nadab.domain.dailyreport.application;
+
+import com.devkor.ifive.nadab.domain.dailyreport.api.dto.response.FeedResponse;
+import com.devkor.ifive.nadab.domain.dailyreport.api.dto.response.FeedListResponse;
+import com.devkor.ifive.nadab.domain.dailyreport.api.dto.response.ShareStatusResponse;
+import com.devkor.ifive.nadab.domain.dailyreport.core.entity.DailyReport;
+import com.devkor.ifive.nadab.domain.dailyreport.core.repository.DailyReportRepository;
+import com.devkor.ifive.nadab.domain.dailyreport.core.dto.FeedDto;
+import com.devkor.ifive.nadab.domain.friend.core.entity.Friendship;
+import com.devkor.ifive.nadab.domain.friend.core.entity.FriendshipStatus;
+import com.devkor.ifive.nadab.domain.friend.core.repository.FriendshipRepository;
+import com.devkor.ifive.nadab.domain.user.core.entity.DefaultProfileType;
+import com.devkor.ifive.nadab.domain.user.infra.ProfileImageUrlBuilder;
+import com.devkor.ifive.nadab.global.core.response.ErrorCode;
+import com.devkor.ifive.nadab.global.exception.NotFoundException;
+import com.devkor.ifive.nadab.global.shared.util.TodayDateTimeProvider;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.LocalDate;
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+public class FeedQueryService {
+
+    private final FriendshipRepository friendshipRepository;
+    private final DailyReportRepository dailyReportRepository;
+    private final ProfileImageUrlBuilder profileImageUrlBuilder;
+
+    public FeedListResponse getFeeds(Long userId) {
+        // 1. ACCEPTED 상태의 친구 관계 조회
+        List<Friendship> friendships = friendshipRepository
+                .findByUserIdAndStatusWithUsers(userId, FriendshipStatus.ACCEPTED);
+
+        // 2. 친구 ID 리스트 추출
+        List<Long> friendIds = friendships.stream()
+                .map(f -> f.getOtherUserId(userId))
+                .toList();
+
+        // 3. 친구가 없으면 빈 리스트 반환
+        if (friendIds.isEmpty()) {
+            return new FeedListResponse(List.of());
+        }
+
+        // 4. 당일 공유된 피드 조회
+        LocalDate today = TodayDateTimeProvider.getTodayDate();
+        List<FeedDto> feedDtos = dailyReportRepository
+                .findSharedFeedsByFriendIds(today, friendIds);
+
+        // 5. 응답 DTO 변환
+        List<FeedResponse> feeds = feedDtos.stream()
+                .map(dto -> {
+                    String profileUrl = buildProfileUrl(dto.profileImageKey(), dto.defaultProfileType());
+
+                    return new FeedResponse(
+                            dto.nickname(),
+                            profileUrl,
+                            dto.interestCode() != null ? dto.interestCode().name() : null,
+                            dto.questionText(),
+                            dto.answerContent(),
+                            dto.emotionCode() != null ? dto.emotionCode().name() : null
+                    );
+                })
+                .toList();
+
+        return new FeedListResponse(feeds);
+    }
+
+    public ShareStatusResponse getShareStatus(Long userId) {
+        // 1. 당일 DailyReport 조회
+        LocalDate today = TodayDateTimeProvider.getTodayDate();
+        DailyReport report = dailyReportRepository.findByUserIdAndDate(userId, today)
+                .orElseThrow(() -> new NotFoundException(ErrorCode.DAILY_REPORT_NOT_FOUND));
+
+        return new ShareStatusResponse(report.getIsShared());
+    }
+
+    private String buildProfileUrl(String profileImageKey, DefaultProfileType defaultProfileType) {
+        if (profileImageKey != null) {
+            return profileImageUrlBuilder.buildUrl(profileImageKey);
+        }
+        if (defaultProfileType != null) {
+            return profileImageUrlBuilder.buildDefaultUrl(defaultProfileType);
+        }
+        return null;
+    }
+}

src/main/java/com/devkor/ifive/nadab/domain/dailyreport/application/FeedService.java

@@ -0,0 +1,40 @@
+package com.devkor.ifive.nadab.domain.dailyreport.application;
+
+import com.devkor.ifive.nadab.domain.dailyreport.core.entity.DailyReport;
+import com.devkor.ifive.nadab.domain.dailyreport.core.repository.DailyReportRepository;
+import com.devkor.ifive.nadab.global.core.response.ErrorCode;
+import com.devkor.ifive.nadab.global.exception.NotFoundException;
+import com.devkor.ifive.nadab.global.shared.util.TodayDateTimeProvider;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.LocalDate;
+
+@Service
+@RequiredArgsConstructor
+@Transactional
+public class FeedService {
+
+    private final DailyReportRepository dailyReportRepository;
+
+    public void startSharing(Long userId) {
+        // 1. 당일 DailyReport 조회
+        LocalDate today = TodayDateTimeProvider.getTodayDate();
+        DailyReport report = dailyReportRepository.findByUserIdAndDate(userId, today)
+                .orElseThrow(() -> new NotFoundException(ErrorCode.DAILY_REPORT_NOT_FOUND));
+
+        // 2. 공유 시작
+        report.startSharing();
+    }
+
+    public void stopSharing(Long userId) {
+        // 1. 당일 DailyReport 조회
+        LocalDate today = TodayDateTimeProvider.getTodayDate();
+        DailyReport report = dailyReportRepository.findByUserIdAndDate(userId, today)
+                .orElseThrow(() -> new NotFoundException(ErrorCode.DAILY_REPORT_NOT_FOUND));
+
+        // 2. 공유 중단
+        report.stopSharing();
+    }
+}

src/main/java/com/devkor/ifive/nadab/domain/dailyreport/core/dto/FeedDto.java

@@ -0,0 +1,19 @@
+package com.devkor.ifive.nadab.domain.dailyreport.core.dto;
+
+import com.devkor.ifive.nadab.domain.dailyreport.core.entity.EmotionCode;
+import com.devkor.ifive.nadab.domain.user.core.entity.DefaultProfileType;
+import com.devkor.ifive.nadab.domain.user.core.entity.InterestCode;
+
+/**
+ * 피드 조회용 DTO
+ */
+public record FeedDto(
+        String nickname,
+        String profileImageKey,
+        DefaultProfileType defaultProfileType,
+        InterestCode interestCode,
+        String questionText,
+        String answerContent,
+        EmotionCode emotionCode
+) {
+}