update: Updated basic domains

- added more fields and methods to domain classes
- fixed import statements (from * to individual import)

src/main/java/com/f_lab/la_planete/domain/Food.java

@@ -1,7 +1,14 @@
 package com.f_lab.la_planete.domain;
 
 import com.f_lab.la_planete.domain.base.BaseEntity;
-import jakarta.persistence.*;
+
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 import lombok.Setter;
@@ -26,23 +33,27 @@ public class Food extends BaseEntity {
 
   private BigDecimal price;
 
-  private int quantity;
+  private int totalQuantity;
 
   @ManyToOne(fetch = LAZY)
   @JoinColumn(name = "store_id")
   private Store store;
 
-  public static Food of(BigDecimal price, int quantity) {
+  public static Food of(BigDecimal price, int totalQuantity) {
     Food food = new Food();
     food.setPrice(price);
-    food.setQuantity(quantity);
+    food.setTotalQuantity(totalQuantity);
     return food;
   }
 
+  public BigDecimal calculateCost(int quantity) {
+    return BigDecimal.valueOf((long) price.intValue() * quantity);
+  }
+
   public void minusQuantity(int deductions) {
-    if (quantity - deductions < 0)
+    if (totalQuantity - deductions < 0)
       throw new IllegalStateException("수량이 부족합니다. 따라서 구매가 진행될 수 없습니다.");
 
-    quantity -= deductions;
+    totalQuantity -= deductions;
   }
 }

src/main/java/com/f_lab/la_planete/domain/Order.java

@@ -1,16 +1,32 @@
 package com.f_lab.la_planete.domain;
 
 import com.f_lab.la_planete.domain.base.BaseEntity;
-import jakarta.persistence.*;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.OneToOne;
+import jakarta.persistence.Table;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
 
+import java.math.BigDecimal;
+
 import static jakarta.persistence.FetchType.LAZY;
 import static jakarta.persistence.GenerationType.IDENTITY;
 import static lombok.AccessLevel.PROTECTED;
 
 @Entity
 @Getter
+@Builder
+@AllArgsConstructor
 @NoArgsConstructor(access = PROTECTED)
 @Table(name = "orders")
 public class Order extends BaseEntity {
@@ -19,10 +35,28 @@ public class Order extends BaseEntity {
   @GeneratedValue(strategy = IDENTITY)
   private Long id;
 
+  @ManyToOne
+  @JoinColumn(name = "food_id")
+  private Food food;
+
+  private BigDecimal totalCost;
+
+  private int quantity;
+
+  // 화폐 추가
+
   @Enumerated(EnumType.STRING)
   private OrderStatus status;
 
   @OneToOne(fetch = LAZY)
   @JoinColumn(name = "payment_id")
   private Payment payment;
+
+  public void updateTotalCost(BigDecimal totalCost) {
+    this.totalCost = totalCost;
+  }
+
+  public BigDecimal calculateTotalCost() {
+    return food.calculateCost(quantity);
+  }
 }

src/main/java/com/f_lab/la_planete/domain/Payment.java

@@ -1,30 +1,46 @@
 package com.f_lab.la_planete.domain;
 
 import com.f_lab.la_planete.domain.base.BaseEntity;
-import jakarta.persistence.*;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToOne;
+import jakarta.persistence.Table;
 import lombok.Getter;
 import lombok.NoArgsConstructor;
+import lombok.Setter;
 
 import java.math.BigDecimal;
 
 import static jakarta.persistence.FetchType.LAZY;
 import static jakarta.persistence.GenerationType.IDENTITY;
+import static lombok.AccessLevel.PRIVATE;
 import static lombok.AccessLevel.PROTECTED;
 
 @Entity
-@Getter
+@Getter @Setter(PRIVATE)
 @NoArgsConstructor(access = PROTECTED)
 @Table(name = "payments")
 public class Payment extends BaseEntity {
 
   @Id @GeneratedValue(strategy = IDENTITY)
   private Long id;
 
-  private BigDecimal amount;
+  private BigDecimal totalCost;
 
   @Enumerated(EnumType.STRING)
   private PaymentStatus status;
 
   @OneToOne(mappedBy = "payment", fetch = LAZY)
   private Order order;
+
+  public static Payment of(BigDecimal totalCost, Order order) {
+    Payment payment = new Payment();
+    payment.setTotalCost(totalCost);
+    payment.setOrder(order);
+    payment.setStatus(PaymentStatus.READY);
+    return payment;
+  }
 }

src/main/java/com/f_lab/la_planete/domain/Store.java

@@ -1,7 +1,11 @@
 package com.f_lab.la_planete.domain;
 
 import com.f_lab.la_planete.domain.base.BaseTimeEntity;
-import jakarta.persistence.*;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.Table;
 import lombok.Getter;
 import lombok.NoArgsConstructor;