패스트캠퍼스 환급챌린지 16일차 : 9개 도메인 프로젝트로 끝내는 백엔드 웹 개발 (Java/Spring) 초격차 패키지 Online 강의 후기

본 포스팅은 패스트캠퍼스 환급 챌린지 참여를 위해 작성하였습니다.

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수강 인증 사진

수강 인증 사진

Comment.java

package org.fastcampus.post.domain.comment;

import org.fastcampus.common.domain.*;
import org.fastcampus.post.domain.Post;
import org.fastcampus.post.domain.content.CommentContent;
import org.fastcampus.post.domain.content.Content;
import org.fastcampus.user.domain.User;

public class Comment {
    private final Long id;
    private final Post post;
    private final User author;
    private final Content content;
    private PositiveIntegerCounter likeCount;

    public static Comment createComment(Post post, User author, String content) {
        return new Comment(null, post, author, new CommentContent(content));
    }

    public Comment(Long id, Post post, User author, Content content) {
        if (author == null) {
            throw new IllegalArgumentException();
        }

        if (post == null) {
            throw new IllegalArgumentException();
        }

        if (content == null) {
            throw new IllegalArgumentException();
        }

        this.id = id;
        this.post = post;
        this.author = author;
        this.content = content;
        this.likeCount = new PositiveIntegerCounter();
    }

    public void like(User user) {
        if (this.author.equals(user)) {
            throw new IllegalArgumentException();
        }
        likeCount.increase();
    }

    public void unlike() {
        likeCount.decrease();
    }

    public void updateComment(User user, String updateContent) {
        if (!this.author.equals(user)) {
            throw new IllegalArgumentException();
        }

        this.content.updateContent(updateContent);
    }

    public int getLikeCount() {
        return likeCount.getCount();
    }

    public String getContent() {
        return content.getContentText();
    }
}

CommentRepository.java

package org.fastcampus.post.application.Interfaces;

import java.util.Optional;
import org.fastcampus.post.domain.comment.*;

public interface CommentRepository {
    Comment save(Comment comment);
    Optional<Comment> findById(Long id);
}

CommentService.java

package org.fastcampus.post.application;

import org.fastcampus.post.application.Interfaces.CommentRepository;
import org.fastcampus.post.application.Interfaces.LikeRepository;
import org.fastcampus.post.application.dto.CreateCommentRequestDto;
import org.fastcampus.post.application.dto.UpdateCommentRequestDto;
import org.fastcampus.post.domain.Post;
import org.fastcampus.post.domain.comment.*;
import org.fastcampus.user.application.UserService;
import org.fastcampus.user.domain.User;

public class CommentService {
    private final UserService userService;
    private final PostService postService;
    private final CommentRepository commentRepository;
    private final LikeRepository likeRepository;

    public CommentService(UserService userService, PostService postService,
            CommentRepository commentRepository, LikeRepository likeRepository) {
        this.userService = userService;
        this.postService = postService;
        this.commentRepository = commentRepository;
        this.likeRepository = likeRepository;
    }

    public Comment getComment(Long id) {
        return commentRepository.findById(id).orElseThrow(IllegalArgumentException::new);
    }

    public Comment createComment(CreateCommentRequestDto dto) {
        Post post = postService.getPost(dto.postId());
        User user = userService.getUser(dto.userId());

        Comment comment = Comment.createComment(post, user, dto.content());
        return commentRepository.save(comment);
    }

    public Comment updateComment(UpdateCommentRequestDto dto) {
        Comment comment = getComment(dto.commentId());
        User user = userService.getUser(dto.userId());

        comment.updateComment(user, dto.content());
        return commentRepository.save(comment);
    }
}

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