[BE] 피드 좋아요 기능 구현

be/src/main/java/com/foodymoody/be/feed/dto/response/FeedRegisterResponse.java

@@ -1,15 +1,14 @@
 package com.foodymoody.be.feed.dto.response;
 
+import com.fasterxml.jackson.annotation.JsonProperty;
+
 public class FeedRegisterResponse {
 
+    @JsonProperty
     private final String id;
 
     public FeedRegisterResponse(String id) {
         this.id = id;
     }
 
-    public String getId() {
-        return id;
-    }
-
 }

be/src/main/java/com/foodymoody/be/feed/service/FeedService.java

@@ -66,10 +66,10 @@ public Slice<FeedReadAllResponse> readAll(Pageable pageable) {
                     .images(images)
                     .createdAt(feed.getCreatedAt())
                     .updatedAt(feed.getUpdatedAt())
+                    .commentCount(feed.getCommentCount())
                     // TODO: 아래 로직 구현 후 추가
-                    .likeCount(feed.getLikeCount())
                     .isLiked(feed.isLiked())
-                    .commentCount(feed.getCommentCount())
+                    .likeCount(feed.getLikeCount())
                     .build();
 
             responses.add(response);

be/src/main/java/com/foodymoody/be/heart/controller/HeartController.java

@@ -0,0 +1,27 @@
+package com.foodymoody.be.heart.controller;
+
+import com.foodymoody.be.common.annotation.MemberId;
+import com.foodymoody.be.heart.dto.request.HeartRequest;
+import com.foodymoody.be.heart.dto.response.HeartResponse;
+import com.foodymoody.be.heart.service.HeartService;
+import com.foodymoody.be.heart.util.HeartMapper;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+@RequiredArgsConstructor
+@RestController
+public class HeartController {
+
+    private final HeartService heartService;
+
+    @PostMapping("/api/likes")
+    public ResponseEntity<HeartResponse> like(@RequestBody HeartRequest heartRequest,
+                                              @MemberId String memberId) {
+        HeartResponse heartResponse = heartService.like(HeartMapper.toHeartServiceRequest(heartRequest, memberId));
+        return ResponseEntity.ok().body(heartResponse);
+    }
+
+}

be/src/main/java/com/foodymoody/be/heart/domain/Heart.java

@@ -0,0 +1,44 @@
+package com.foodymoody.be.heart.domain;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+@Entity
+public class Heart {
+
+    @Id
+    private String id;
+    private String feedId;
+    private String memberId;
+    private int count;
+
+    public Heart() {
+    }
+
+    public Heart(String id, String feedId, String memberId) {
+        this.id = id;
+        this.feedId = feedId;
+        this.memberId = memberId;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public String getFeedId() {
+        return feedId;
+    }
+
+    public String getMemberId() {
+        return memberId;
+    }
+
+    public int getCount() {
+        return count;
+    }
+
+    public void updateCount() {
+        this.count += 1;
+    }
+
+}

be/src/main/java/com/foodymoody/be/heart/dto/request/HeartRequest.java

@@ -0,0 +1,17 @@
+package com.foodymoody.be.heart.dto.request;
+
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.NoArgsConstructor;
+
+@AllArgsConstructor
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class HeartRequest {
+
+    private String feedId;
+
+    public String getFeedId() {
+        return feedId;
+    }
+
+}

be/src/main/java/com/foodymoody/be/heart/dto/request/HeartServiceRequest.java

@@ -0,0 +1,22 @@
+package com.foodymoody.be.heart.dto.request;
+
+import lombok.AccessLevel;
+import lombok.AllArgsConstructor;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor
+public class HeartServiceRequest {
+
+    private String feedId;
+    private String memberId;
+
+    public String getMemberId() {
+        return memberId;
+    }
+
+    public String getFeedId() {
+        return feedId;
+    }
+
+}

be/src/main/java/com/foodymoody/be/heart/dto/response/HeartResponse.java

@@ -0,0 +1,20 @@
+package com.foodymoody.be.heart.dto.response;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class HeartResponse {
+
+    @JsonProperty
+    private String id;
+    @JsonProperty
+    private String feedId;
+    @JsonProperty
+    private String memberId;
+
+    public HeartResponse(String id, String feedId, String memberId) {
+        this.id = id;
+        this.feedId = feedId;
+        this.memberId = memberId;
+    }
+
+}

be/src/main/java/com/foodymoody/be/heart/repository/HeartRepository.java

@@ -0,0 +1,11 @@
+package com.foodymoody.be.heart.repository;
+
+import com.foodymoody.be.heart.domain.Heart;
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface HeartRepository extends JpaRepository<Heart, String> {
+
+    Optional<Heart> findHeartByMemberIdAndFeedId(String memberId, String feedId);
+
+}

be/src/main/java/com/foodymoody/be/heart/service/HeartService.java

@@ -0,0 +1,36 @@
+package com.foodymoody.be.heart.service;
+
+import com.foodymoody.be.heart.domain.Heart;
+import com.foodymoody.be.heart.dto.request.HeartServiceRequest;
+import com.foodymoody.be.heart.dto.response.HeartResponse;
+import com.foodymoody.be.heart.repository.HeartRepository;
+import com.foodymoody.be.heart.util.HeartMapper;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+@RequiredArgsConstructor
+@Service
+public class HeartService {
+
+    private final HeartRepository heartRepository;
+
+    public HeartResponse like(HeartServiceRequest heartServiceRequest) {
+        if (isHeartExist(heartServiceRequest)) {
+            throw new IllegalArgumentException("이미 좋아요 누른 피드입니다.");
+        }
+
+        Heart heart = HeartMapper.toHeartWithFeedIdAndMemberId(heartServiceRequest.getFeedId(),
+                heartServiceRequest.getMemberId());
+        heart.updateCount();
+
+        Heart savedHeart = heartRepository.save(heart);
+        return HeartMapper.toHeartResponse(savedHeart);
+    }
+
+    private boolean isHeartExist(HeartServiceRequest heartServiceRequest) {
+        return heartRepository.findHeartByMemberIdAndFeedId(heartServiceRequest.getMemberId(),
+                        heartServiceRequest.getFeedId())
+                .isPresent();
+    }
+
+}

be/src/main/java/com/foodymoody/be/heart/util/HeartMapper.java

@@ -0,0 +1,27 @@
+package com.foodymoody.be.heart.util;
+
+import com.foodymoody.be.common.util.IdGenerator;
+import com.foodymoody.be.heart.domain.Heart;
+import com.foodymoody.be.heart.dto.request.HeartRequest;
+import com.foodymoody.be.heart.dto.request.HeartServiceRequest;
+import com.foodymoody.be.heart.dto.response.HeartResponse;
+
+public class HeartMapper {
+
+    private HeartMapper() {
+        throw new IllegalArgumentException("Utility Class");
+    }
+
+    public static HeartServiceRequest toHeartServiceRequest(HeartRequest heartRequest, String memberId) {
+        return new HeartServiceRequest(heartRequest.getFeedId(), memberId);
+    }
+
+    public static Heart toHeartWithFeedIdAndMemberId(String feedId, String memberId) {
+        return new Heart(IdGenerator.generate(), feedId, memberId);
+    }
+
+    public static HeartResponse toHeartResponse(Heart savedHeart) {
+        return new HeartResponse(savedHeart.getId(), savedHeart.getFeedId(), savedHeart.getMemberId());
+    }
+
+}

be/src/test/java/com/foodymoody/be/acceptance/heart/HeartAcceptanceTest.java

@@ -0,0 +1,35 @@
+package com.foodymoody.be.acceptance.heart;
+
+import static com.foodymoody.be.acceptance.feed.FeedSteps.피드를_등록한다;
+import static com.foodymoody.be.acceptance.heart.HeartSteps.응답코드가_200이고_id가_존재하면_정상적으로_좋아요_가능;
+import static com.foodymoody.be.acceptance.heart.HeartSteps.좋아요를_한다;
+
+import com.foodymoody.be.acceptance.AcceptanceTest;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+class HeartAcceptanceTest extends AcceptanceTest {
+
+    @AfterEach
+    void cleanupDatabase() {
+        데이터베이스를_초기화한다();
+    }
+
+    @DisplayName("좋아요에 성공하면 응답코드 200을 반환한다.")
+    @Test
+    void when_like_then_response200() {
+        // docs
+        api_문서_타이틀("like", spec);
+
+        // given
+        String feedId = 피드를_등록한다(회원아티_액세스토큰, spec).jsonPath().getString("id");
+
+        // when
+        var response = 좋아요를_한다(feedId, 회원아티_액세스토큰, spec);
+
+        // then
+        응답코드가_200이고_id가_존재하면_정상적으로_좋아요_가능(response);
+    }
+
+}

be/src/test/java/com/foodymoody/be/acceptance/heart/HeartSteps.java

@@ -0,0 +1,44 @@
+package com.foodymoody.be.acceptance.heart;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertAll;
+
+import io.restassured.RestAssured;
+import io.restassured.response.ExtractableResponse;
+import io.restassured.response.Response;
+import io.restassured.specification.RequestSpecification;
+import java.util.Map;
+import org.springframework.http.MediaType;
+
+public class HeartSteps {
+
+    public static ExtractableResponse<Response> 좋아요를_한다(String feedId, String accessToken, RequestSpecification spec) {
+        Map<String, Object> body = Map.of(
+                "feedId", feedId
+        );
+
+        return RestAssured
+                .given()
+                .contentType(MediaType.APPLICATION_JSON_VALUE)
+                .spec(spec)
+                .log().all()
+                .auth()
+                .oauth2(accessToken)
+                .body(body)
+                .when()
+                .post("/api/likes")
+                .then()
+                .log().all()
+                .extract();
+    }
+
+    public static void 응답코드가_200이고_id가_존재하면_정상적으로_좋아요_가능(ExtractableResponse<Response> response) {
+        String id = response.jsonPath().getString("id");
+
+        assertAll(
+                () -> assertThat(response.statusCode()).isEqualTo(200),
+                assertThat(id)::isNotNull
+        );
+    }
+
+}