스크랩 엔티티 구현 (issue #489)

backend/src/main/java/develup/domain/scrap/Scrap.java

@@ -0,0 +1,39 @@
+package develup.domain.scrap;
+
+import develup.domain.IdentifiableEntity;
+import develup.domain.member.Member;
+import jakarta.persistence.Column;
+import jakarta.persistence.Embedded;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+
+@Entity
+public class Scrap extends IdentifiableEntity {
+
+    @ManyToOne(fetch = FetchType.LAZY)
+    @JoinColumn(nullable = false)
+    private Member member;
+
+    @Embedded
+    private ScrapedItem item;
+
+    @Column(nullable = false)
+    private boolean isScrapped;
+
+    protected Scrap() {
+    }
+
+    public Scrap(Member member, ScrapedItem item) {
+        this(null, member, item, true);
+    }
+
+    public Scrap(Long id, Member member, ScrapedItem item, boolean isScrapped) {
+        super(id);
+        this.id = id;
+        this.member = member;
+        this.item = item;
+        this.isScrapped = isScrapped;
+    }
+}

backend/src/main/java/develup/domain/scrap/ScrapRepository.java

@@ -0,0 +1,6 @@
+package develup.domain.scrap;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface ScrapRepository extends JpaRepository<Scrap, Long> {
+}

backend/src/main/java/develup/domain/scrap/ScrapedItem.java

@@ -0,0 +1,25 @@
+package develup.domain.scrap;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Embeddable;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+
+@Embeddable
+public class ScrapedItem {
+
+    @Column(name = "item_id", nullable = false)
+    private Long id;
+
+    @Column(nullable = false)
+    @Enumerated(EnumType.STRING)
+    private ScrapedItemType itemType;
+
+    protected ScrapedItem() {
+    }
+
+    public ScrapedItem(Long id, ScrapedItemType itemType) {
+        this.id = id;
+        this.itemType = itemType;
+    }
+}

backend/src/main/java/develup/domain/scrap/ScrapedItemType.java

@@ -0,0 +1,8 @@
+package develup.domain.scrap;
+
+public enum ScrapedItemType {
+
+    DISCUSSION,
+    SOLUTION,
+    ;
+}