feat: 뉴스레터 좋아요 엔티티 추가 (#63)

src/main/java/com/api/ttoklip/domain/newsletter/like/entity/NewsletterLike.java

@@ -0,0 +1,38 @@
+package com.api.ttoklip.domain.newsletter.like.entity;
+
+import com.api.ttoklip.domain.member.domain.Member;
+import com.api.ttoklip.domain.newsletter.post.domain.Newsletter;
+import com.fasterxml.jackson.databind.ser.Serializers;
+import jakarta.persistence.*;
+import lombok.*;
+
+import static com.api.ttoklip.global.util.SecurityUtil.getCurrentMember;
+
+@Entity
+@Getter
+@Builder
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+public class NewsletterLike extends Serializers.Base {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id", updatable = false)
+    private Long id;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "member_id")
+    private Member member;
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(name = "newsletter_id")
+    private Newsletter newsletter;
+
+    public static NewsletterLike from(final Newsletter newsletter) {
+        return NewsletterLike.builder()
+                .member(getCurrentMember())
+                .newsletter(newsletter)
+                .build();
+    }
+
+}