[feat/#87] 좋아요한 기록 조회 api 구현

clokey-api/src/main/java/org/clokey/domain/history/repository/HistoryImageRepository.java

@@ -3,7 +3,22 @@
 import java.util.List;
 import org.clokey.history.entity.HistoryImage;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 
 public interface HistoryImageRepository extends JpaRepository<HistoryImage, Long> {
+    @Query(
+            """
+        SELECT hi.history.id, hi.imageUrl
+        FROM HistoryImage hi
+        WHERE hi.history.id IN :historyIds
+        AND hi.id = (
+            SELECT MIN(h2.id)
+            FROM HistoryImage h2
+            WHERE h2.history.id = hi.history.id
+        )
+    """)
+    List<Object[]> getFirstImageUrlsWithHistoryId(@Param("historyIds") List<Long> historyIds);
+
     List<HistoryImage> findByHistoryId(Long historyId);
 }

clokey-api/src/main/java/org/clokey/domain/like/controller/LikeController.java

@@ -0,0 +1,41 @@
+package org.clokey.domain.like.controller;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.Parameter;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import lombok.RequiredArgsConstructor;
+import org.clokey.code.GlobalBaseSuccessCode;
+import org.clokey.domain.like.dto.response.LikedHistoriesResponse;
+import org.clokey.domain.like.service.LikeService;
+import org.clokey.global.annotation.PageSize;
+import org.clokey.response.BaseResponse;
+import org.clokey.response.SliceResponse;
+import org.springframework.validation.annotation.Validated;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/likes")
+@RequiredArgsConstructor
+@Tag(name = "9. 좋아요 API", description = "좋아요 관련 API입니다.")
+@Validated
+public class LikeController {
+
+    private final LikeService likeService;
+
+    @GetMapping("/histories")
+    @Operation(summary = "좋아요한 기록 조회", description = "사용자가 좋아요한 기록을 조회합니다.")
+    public BaseResponse<SliceResponse<LikedHistoriesResponse.LikedHistoryPreview>>
+            getLikedHistories(
+                    @Parameter(description = "이전 페이지의 좋아요 ID (첫 요청 시 생략)")
+                            @RequestParam(required = false)
+                            Long lastLikeId,
+                    @Parameter(description = "페이지당 조회할 개수") @RequestParam @PageSize Integer size) {
+        SliceResponse<LikedHistoriesResponse.LikedHistoryPreview> response =
+                likeService.getLikedHistories(lastLikeId, size);
+
+        return BaseResponse.onSuccess(GlobalBaseSuccessCode.OK, response);
+    }
+}

clokey-api/src/main/java/org/clokey/domain/like/dto/response/LikedHistoriesResponse.java

@@ -0,0 +1,19 @@
+package org.clokey.domain.like.dto.response;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+import java.util.List;
+
+@Schema(description = "좋아요 히스토리 조회 결과 (Slice 기반)")
+public record LikedHistoriesResponse(
+        @Schema(description = "히스토리 미리보기 목록") List<LikedHistoryPreview> historyPreviews,
+        @Schema(description = "마지막 페이지 여부", example = "false") boolean isLast) {
+
+    @Schema(description = "히스토리 미리보기 DTO")
+    public record LikedHistoryPreview(
+            @Schema(description = "히스토리 ID", example = "30") Long id,
+            @Schema(
+                            description = "히스토리 대표 이미지 URL",
+                            example =
+                                    "https://clokeybucket.s3.ap-northeast-2.amazonaws.com/example.jpg")
+                    String imageUrl) {}
+}

clokey-api/src/main/java/org/clokey/domain/like/repository/MemberLikeRepository.java

@@ -1,6 +1,21 @@
 package org.clokey.domain.like.repository;
 
+import java.util.List;
 import org.clokey.like.entity.MemberLike;
+import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
 
-public interface MemberLikeRepository extends JpaRepository<MemberLike, Long> {}
+public interface MemberLikeRepository extends JpaRepository<MemberLike, Long> {
+
+    @Query(
+            """
+        SELECT ml
+        FROM MemberLike ml
+        WHERE ml.member.id = :memberId
+          AND (:lastLikeId IS NULL OR ml.id < :lastLikeId)
+        ORDER BY ml.id DESC
+        """)
+    List<MemberLike> findLikedHistoriesByMemberId(
+            Long memberId, Long lastLikeId, Pageable pageable);
+}

clokey-api/src/main/java/org/clokey/domain/like/service/LikeService.java

@@ -0,0 +1,9 @@
+package org.clokey.domain.like.service;
+
+import org.clokey.domain.like.dto.response.LikedHistoriesResponse;
+import org.clokey.response.SliceResponse;
+
+public interface LikeService {
+    SliceResponse<LikedHistoriesResponse.LikedHistoryPreview> getLikedHistories(
+            Long lastLikedId, Integer size);
+}

clokey-api/src/main/java/org/clokey/domain/like/service/LikeServiceImpl.java

@@ -0,0 +1,77 @@
+package org.clokey.domain.like.service;
+
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+import lombok.RequiredArgsConstructor;
+import org.clokey.domain.history.repository.HistoryImageRepository;
+import org.clokey.domain.like.dto.response.LikedHistoriesResponse;
+import org.clokey.domain.like.repository.MemberLikeRepository;
+import org.clokey.global.util.MemberUtil;
+import org.clokey.like.entity.MemberLike;
+import org.clokey.member.entity.Member;
+import org.clokey.response.SliceResponse;
+import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+@Service
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+public class LikeServiceImpl implements LikeService {
+
+    private final MemberUtil memberUtil;
+    private final MemberLikeRepository memberLikeRepository;
+    private final HistoryImageRepository historyImageRepository;
+
+    @Override
+    public SliceResponse<LikedHistoriesResponse.LikedHistoryPreview> getLikedHistories(
+            Long lastLikeId, Integer size) {
+
+        Member currentMember = memberUtil.getCurrentMember();
+
+        // limit + 1 조회
+        Pageable pageable = PageRequest.of(0, size + 1);
+
+        List<MemberLike> likes =
+                memberLikeRepository.findLikedHistoriesByMemberId(
+                        currentMember.getId(), lastLikeId, pageable);
+
+        boolean isLast = likes.size() <= size;
+
+        if (!isLast) {
+            likes = likes.subList(0, size);
+        }
+
+        if (likes.isEmpty()) {
+            return new SliceResponse<>(List.of(), true);
+        }
+
+        List<Long> historyIds = likes.stream().map(like -> like.getHistory().getId()).toList();
+
+        Map<Long, String> imageMap = findFirstImagesByHistoryIds(historyIds);
+
+        List<LikedHistoriesResponse.LikedHistoryPreview> previews =
+                likes.stream()
+                        .map(
+                                like ->
+                                        new LikedHistoriesResponse.LikedHistoryPreview(
+                                                like.getHistory().getId(),
+                                                imageMap.get(like.getHistory().getId())))
+                        .toList();
+
+        return new SliceResponse<>(previews, isLast);
+    }
+
+    private Map<Long, String> findFirstImagesByHistoryIds(List<Long> historyIds) {
+        if (historyIds.isEmpty()) return Map.of();
+
+        List<Object[]> rows = historyImageRepository.getFirstImageUrlsWithHistoryId(historyIds);
+
+        return rows.stream()
+                .collect(
+                        Collectors.toMap(
+                                row -> ((Number) row[0]).longValue(), row -> (String) row[1]));
+    }
+}

clokey-api/src/test/java/org/clokey/domain/like/controller/LikeControllerTest.java

@@ -0,0 +1,108 @@
+package org.clokey.domain.like.controller;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.BDDMockito.given;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.util.List;
+import org.clokey.domain.like.dto.response.LikedHistoriesResponse;
+import org.clokey.domain.like.service.LikeService;
+import org.clokey.response.SliceResponse;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.bean.override.mockito.MockitoBean;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.ResultActions;
+
+@WebMvcTest(LikeController.class)
+@AutoConfigureMockMvc(addFilters = false)
+public class LikeControllerTest {
+    @Autowired private MockMvc mockMvc;
+    @Autowired private ObjectMapper objectMapper;
+
+    @MockitoBean private LikeService likeService;
+
+    @Nested
+    class 좋아요한_기록_조회_시 {
+        @Test
+        void 유효한_요청이면_좋아요한_기록을_반환한다() throws Exception {
+            // given
+            List<LikedHistoriesResponse.LikedHistoryPreview> previews =
+                    List.of(
+                            new LikedHistoriesResponse.LikedHistoryPreview(
+                                    1L, "https://img.com/img1.jpg"),
+                            new LikedHistoriesResponse.LikedHistoryPreview(
+                                    2L, "https://img.com/img2.jpg"));
+
+            SliceResponse<LikedHistoriesResponse.LikedHistoryPreview> sliceResponse =
+                    new SliceResponse<>(previews, true);
+
+            given(likeService.getLikedHistories(any(), anyInt())).willReturn(sliceResponse);
+
+            ResultActions perform =
+                    mockMvc.perform(
+                            get("/likes/histories")
+                                    .param("size", "10")
+                                    .contentType(MediaType.APPLICATION_JSON));
+
+            // then
+            perform.andExpect(status().isOk())
+                    .andExpect(jsonPath("$.code").value("COMMON200"))
+                    .andExpect(jsonPath("$.message").value("성공입니다."))
+                    .andExpect(jsonPath("$.result.content[0].id").value(1L))
+                    .andExpect(
+                            jsonPath("$.result.content[0].imageUrl")
+                                    .value("https://img.com/img1.jpg"))
+                    .andExpect(jsonPath("$.result.content[1].id").value(2L))
+                    .andExpect(
+                            jsonPath("$.result.content[1].imageUrl")
+                                    .value("https://img.com/img2.jpg"))
+                    .andExpect(jsonPath("$.result.isLast").value(true));
+        }
+
+        @Test
+        void 마지막_페이지가_아닌_경우_isLast를_false로_응답한다() throws Exception {
+            // given
+            List<LikedHistoriesResponse.LikedHistoryPreview> previews =
+                    List.of(
+                            new LikedHistoriesResponse.LikedHistoryPreview(
+                                    1L, "https://img.com/img1.jpg"),
+                            new LikedHistoriesResponse.LikedHistoryPreview(
+                                    2L, "https://img.com/img2.jpg"));
+
+            SliceResponse<LikedHistoriesResponse.LikedHistoryPreview> sliceResponse =
+                    new SliceResponse<>(previews, false);
+
+            given(likeService.getLikedHistories(any(), anyInt())).willReturn(sliceResponse);
+
+            // when
+            ResultActions perform =
+                    mockMvc.perform(
+                            get("/likes/histories")
+                                    .param("size", "10")
+                                    .contentType(MediaType.APPLICATION_JSON));
+
+            // then
+            perform.andExpect(status().isOk())
+                    .andExpect(jsonPath("$.code").value("COMMON200"))
+                    .andExpect(jsonPath("$.message").value("성공입니다."))
+                    .andExpect(jsonPath("$.result.content[0].id").value(1L))
+                    .andExpect(
+                            jsonPath("$.result.content[0].imageUrl")
+                                    .value("https://img.com/img1.jpg"))
+                    .andExpect(jsonPath("$.result.content[1].id").value(2L))
+                    .andExpect(
+                            jsonPath("$.result.content[1].imageUrl")
+                                    .value("https://img.com/img2.jpg"))
+                    .andExpect(jsonPath("$.result.isLast").value(false));
+        }
+    }
+}