Feat: Inventory Entity 설계

Payment-Service/src/main/java/kr/co/paymentservice/domain/entity/InventoryEntity.java

@@ -0,0 +1,76 @@
+package kr.co.paymentservice.domain.entity;
+
+import kr.co.paymentservice.domain.shared.BaseEntity;
+import kr.co.paymentservice.domain.shared.enums.CouponPeriod;
+import lombok.Getter;
+
+import javax.persistence.*;
+import java.time.LocalDate;
+
+@Getter
+@Table(name = "tbl_inventory")
+@Entity
+public class InventoryEntity extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "inventory_id")
+    private Long id;
+
+    @Column(nullable = false)
+    private Long memberId; //기업 회원과 일대일 관계
+
+    @Column(nullable = false)
+    private int remainCouponCnt;
+
+    @Column(nullable = false)
+    private LocalDate endPeriodDate;
+
+    @Column(nullable = false)
+    private boolean isSubscription;
+
+
+    //== coupon ==//
+    public void useRemainCoupon(int usedCouponNum) {
+        if (this.remainCouponCnt - usedCouponNum < 0)
+            throw new RuntimeException("쿠폰이 충분하지 않습니다.");
+
+        this.remainCouponCnt -= usedCouponNum;
+    }
+
+    public void addCoupon(int addCouponNum) {
+        this.remainCouponCnt += addCouponNum;
+    }
+
+
+    //== period ==//
+    public boolean isPeriodValid() {
+        if (endPeriodDate.isAfter(LocalDate.now()) || endPeriodDate.isEqual(LocalDate.now()))
+            return true;
+        return false;
+    }
+
+    public void addPeriod(CouponPeriod couponPeriod) {
+        if (isPeriodValid()) {
+            this.endPeriodDate = this.endPeriodDate.plusMonths(couponPeriod.getPeriod());
+        }
+        else {
+            this.endPeriodDate = LocalDate.now().plusMonths(couponPeriod.getPeriod());
+        }
+    }
+
+    //== subscription ==//
+    public void doSubscription() {
+        if (this.isSubscription)
+            throw new RuntimeException("이미 구독중입니다.");
+
+        if (isPeriodValid())
+            throw new RuntimeException("기간권 사용중입니다.");
+
+        this.isSubscription = true;
+    }
+
+    public void cancelSubscription() {
+        this.isSubscription = false;
+    }
+}