Spring Instagram clone (Feed, Likes)

Kai Roh·2022년 4월 11일

Feed

In ImageRepository, add the native query to select images from following users. Get the image from toUserId and show in the fromUserId's feed.

public interface ImageRepository extends JpaRepository<Image, Integer> {

    @Query(value = "SELECT * FROM image WHERE userId IN (SELECT toUserId FROM subscribe WHERE fromUserId = :principalId) ORDER BY id DESC", nativeQuery = true)
    Page<Image> mStory(int principalId, Pageable pageable);

}

In ImageService, import images from ImageRepository

public Page<Image> imageStory(int principalId, Pageable pageable) {
    Page<Image> images = imageRepository.mStory(principalId, pageable);
    return images;
}

Use ImageApiController and call the imageService. (There are 5 images in one page by default)

public class ImageApiController {

    private final ImageService imageService;

    @GetMapping("/api/image")
    public ResponseEntity<?> imageStory(@AuthenticationPrincipal PrincipalDetails principalDetails,
                                        @PageableDefault(size = 5) Pageable pageable) {
        Page<Image> images = imageService.imageStory(principalDetails.getUser().getId(), pageable);
        return new ResponseEntity<>(new CMRespDto<>(1, "Success", images), HttpStatus.OK);
    }

}

Likes

Model

Get imageId from Image class by using native query.
Below code is interface

public interface LikesRepository extends JpaRepository<Likes, Integer> {

    @Modifying
    @Query(value = "INSERT INTO likes(imageId, userId, createDate) VALUES(:imageId, :principalId, now())", nativeQuery = true)
    int mLikes(int imageId, int principalId);

    @Modifying
    @Query(value = "DELETE FROM likes WHERE imageId = :imageId AND userId = :principalId", nativeQuery = true)
    int mUnLikes(int imageId, int principalId);

}

Controller

Make controller in ImageApiController. 'likes', 'unlikes' and each mapping -> PostMapping, DeleteMapping. add below

@PostMapping("/api/image/{imageId}/likes")
public ResponseEntity<?> likes(@PathVariable int imageId, @AuthenticationPrincipal PrincipalDetails principalDetails) {
    likesService.like(imageId, principalDetails.getUser().getId());
    return new ResponseEntity<>(new CMRespDto<>(1, "Like Success", null), HttpStatus.CREATED);
}

@DeleteMapping("/api/image/{imageId}/likes")
public ResponseEntity<?> unLikes(@PathVariable int imageId, @AuthenticationPrincipal PrincipalDetails principalDetails) {
    likesService.unLike(imageId, principalDetails.getUser().getId());
    return new ResponseEntity<>(new CMRespDto<>(1, "Unlike success", null), HttpStatus.CREATED);
}