[feat] #5 게시물 엔티티 클래스 구현

src/main/java/org/sopt/seminar/domain/post/domain/Post.java

@@ -0,0 +1,65 @@
+package org.sopt.seminar.domain.post.domain;
+
+import jakarta.persistence.*;
+import lombok.*;
+import org.sopt.seminar.domain.member.domain.Member;
+import org.sopt.seminar.global.common.BaseTimeEntity;
+
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+@Builder(access = AccessLevel.PRIVATE)
+@Getter
+@Entity
+public class Post extends BaseTimeEntity {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "post_id")
+    private Long id;
+    private String title;
+    private String content;
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "member_id")
+    private Member member;
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "category_id")
+    private Category category;
+
+    public static Post createPost(final String title, final String content, final Category category, final Member member) {
+        Post post = Post.builder()
+                .title(title)
+                .content(content)
+                .build();
+        post.changeMember(member);
+        post.changeCategory(category);
+        return post;
+    }
+
+    public void changeMember(Member member) {
+        if (this.member != null) {
+            this.member.removePost(this);
+        }
+        this.member = member;
+        member.addPost(this);
+    }
+
+    public void changeCategory(Category category) {
+        if (this.category != null) {
+            this.category.removePost(this);
+        }
+        this.category = category;
+        category.addPost(this);
+    }
+
+    public void updateTitleAndContent(String title, String content) {
+        updateTitle(title);
+        updateContent(content);
+    }
+
+    public void updateTitle(String title) {
+        this.title = title;
+    }
+
+    public void updateContent(String content) {
+        this.content = content;
+    }
+}