feat: 좋아요 등록 삭제

spot 좋아요 등록 및 삭제 구현

#15

build.gradle

@@ -39,4 +39,4 @@ dependencies {
 
 tasks.named('test') {
 	useJUnitPlatform()
-}
+}

src/main/java/com/umc/hackaton/snapspot/like/controller/LikeController.java

@@ -0,0 +1,27 @@
+package com.umc.hackaton.snapspot.like.controller;
+
+import com.umc.hackaton.snapspot.like.dto.LikeDto;
+import com.umc.hackaton.snapspot.like.service.LikeService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/api/v1/spots/like")
+@RequiredArgsConstructor
+public class LikeController {
+
+    private final LikeService likeService;
+
+    @PostMapping("")
+    public ResponseEntity<LikeDto.ResponseDto> registerLike(@RequestBody LikeDto.RequestDto likeDto){
+        return ResponseEntity.ok(likeService.registerLike(likeDto));
+    }
+
+
+    @DeleteMapping("")
+    public ResponseEntity<LikeDto.ResponseDto> deleteLike(@RequestBody LikeDto.RequestDto likeDto){
+        return ResponseEntity.ok(likeService.deleteLike(likeDto));
+    }
+
+}

src/main/java/com/umc/hackaton/snapspot/like/converter/LikeConverter.java

@@ -0,0 +1,14 @@
+package com.umc.hackaton.snapspot.like.converter;
+
+import com.umc.hackaton.snapspot.like.entity.Like;
+import com.umc.hackaton.snapspot.spot.entity.Spot;
+import com.umc.hackaton.snapspot.user.entity.User;
+
+public class LikeConverter {
+    public static Like toEntity(User user, Spot spot){
+        return Like.builder()
+                .spot(spot)
+                .user(user)
+                .build();
+    }
+}

src/main/java/com/umc/hackaton/snapspot/like/dto/LikeDto.java

@@ -0,0 +1,21 @@
+package com.umc.hackaton.snapspot.like.dto;
+
+import lombok.Builder;
+import lombok.Getter;
+
+public class LikeDto {
+    @Builder
+    @Getter
+    public static class RequestDto{
+        Long userId;
+        Long spotId;
+
+    }
+
+    @Builder
+    @Getter
+    public static class ResponseDto{
+        String message;
+
+    }
+}

src/main/java/com/umc/hackaton/snapspot/like/entity/Like.java

@@ -0,0 +1,34 @@
+package com.umc.hackaton.snapspot.like.entity;
+
+import com.umc.hackaton.snapspot.config.entity.BaseEntity;
+import com.umc.hackaton.snapspot.spot.entity.Spot;
+import com.umc.hackaton.snapspot.user.entity.User;
+import jakarta.persistence.*;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.NoArgsConstructor;
+import lombok.RequiredArgsConstructor;
+
+@Entity
+@Table(name = "`like`")
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class Like extends BaseEntity {
+
+
+    @Id
+    @Column(name="id")
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    private Long id;
+
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "user_id", nullable = false)
+    private User user;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "spot_id", nullable = false)
+    private Spot spot;
+
+}

src/main/java/com/umc/hackaton/snapspot/like/repository/LikeRepository.java

@@ -0,0 +1,13 @@
+package com.umc.hackaton.snapspot.like.repository;
+
+import com.umc.hackaton.snapspot.like.entity.Like;
+import com.umc.hackaton.snapspot.spot.entity.Spot;
+import com.umc.hackaton.snapspot.user.entity.User;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface LikeRepository extends JpaRepository<Like, Long> {
+
+    Like findByUserAndSpot(User user, Spot spot);
+}

src/main/java/com/umc/hackaton/snapspot/like/service/LikeService.java

@@ -0,0 +1,61 @@
+package com.umc.hackaton.snapspot.like.service;
+
+import com.umc.hackaton.snapspot.like.converter.LikeConverter;
+import com.umc.hackaton.snapspot.like.dto.LikeDto;
+import com.umc.hackaton.snapspot.like.entity.Like;
+import com.umc.hackaton.snapspot.like.repository.LikeRepository;
+import com.umc.hackaton.snapspot.spot.entity.Spot;
+import com.umc.hackaton.snapspot.spot.repository.SpotRepository;
+import com.umc.hackaton.snapspot.user.entity.User;
+import com.umc.hackaton.snapspot.user.repository.UserRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.Optional;
+
+@Service
+@RequiredArgsConstructor
+public class LikeService {
+
+    private final LikeRepository likeRepository;
+    private final SpotRepository spotRepository;
+    private final UserRepository userRepository;
+
+    public LikeDto.ResponseDto registerLike(LikeDto.RequestDto likeDto) {
+        User user = userRepository.findById(likeDto.getUserId()).orElseThrow(()->new IllegalArgumentException("존재하지 않는 사용자입니다."));
+
+        Spot spot  = spotRepository.findById(likeDto.getSpotId()).orElseThrow(()->new IllegalArgumentException("존재하지 않는 스팟입니다."));
+        Like likeEntity = likeRepository.findByUserAndSpot(user, spot);
+
+        if(likeEntity == null){
+            Like saveLike = LikeConverter.toEntity(user, spot);
+            likeRepository.save(saveLike);
+            //like 하나 증가
+            spot.increaseLike();
+            spotRepository.save(spot);
+            return LikeDto.ResponseDto.builder()
+                    .message("좋아요 등록 완료").build();
+        }
+        return LikeDto.ResponseDto.builder()
+                .message("좋아요 등록 실패").build();
+    }
+
+
+    public LikeDto.ResponseDto deleteLike(LikeDto.RequestDto likeDto) {
+        User user = userRepository.findById(likeDto.getUserId()).orElseThrow(()->new IllegalArgumentException("존재하지 않는 사용자입니다."));
+
+        Spot spot  = spotRepository.findById(likeDto.getSpotId()).orElseThrow(()->new IllegalArgumentException("존재하지 않는 스팟입니다."));
+
+        Like likeEntity = likeRepository.findByUserAndSpot(user, spot);
+
+        if(likeEntity != null){
+            likeRepository.delete(likeEntity);
+            spot.decreaseLike();
+            spotRepository.save(spot);
+            return LikeDto.ResponseDto.builder()
+                    .message("삭제 완료").build();
+        }
+        return LikeDto.ResponseDto.builder()
+                .message("좋아요 삭제에 실패했습니다.").build();
+    }
+}

src/main/java/com/umc/hackaton/snapspot/spot/entity/Spot.java

@@ -46,4 +46,12 @@ public class Spot extends BaseEntity {
 
     @Column(name = "description", nullable = false, columnDefinition = "TEXT")
     private String description;
+
+    public void increaseLike() {
+        this.likeNum  -= 1;
+    }
+
+    public void decreaseLike() {
+        this.likeNum  += 1;
+    }
 }

src/main/java/com/umc/hackaton/snapspot/spot/repository/SpotRepository.java

@@ -6,4 +6,6 @@
 import java.util.Optional;
 
 public interface SpotRepository extends JpaRepository<Spot, Long> {
+    @Override
+    void delete(Spot entity);
 }

src/main/java/com/umc/hackaton/snapspot/user/repository/UserRepository.java

@@ -2,11 +2,14 @@
 
 import com.umc.hackaton.snapspot.user.entity.User;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
 
 import java.util.Optional;
 
+@Repository
 public interface UserRepository extends JpaRepository<User, Long> {
     Optional<User> findByUsername(String username);
 
     User findUserById(Long id);
 }
+

src/main/resources/application.yml

@@ -1,7 +1,7 @@
 spring:
   datasource:
-#    driver-class-name: com.mysql.cj.jdbc.Driver
-#    url: jdbc:mysql://localhost:3306/spot?useSSL=false&allowPublicKeyRetrieval=true
+    #    driver-class-name: com.mysql.cj.jdbc.Driver
+    #    url: jdbc:mysql://localhost:3306/spot?useSSL=false&allowPublicKeyRetrieval=true
     url: jdbc:h2:mem:spotdb
     username: root
     password: