feat: 벌레 상품 구매 기능 구현

src/main/java/com/moabam/api/application/bug/BugService.java

@@ -3,24 +3,34 @@
 import static com.moabam.api.domain.bug.BugActionType.*;
 import static com.moabam.api.domain.bug.BugType.*;
 import static com.moabam.api.domain.product.ProductType.*;
+import static com.moabam.global.error.model.ErrorMessage.*;
+import static java.util.Objects.*;
 
 import java.util.List;
 
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import com.moabam.api.application.member.MemberService;
+import com.moabam.api.application.payment.PaymentMapper;
 import com.moabam.api.application.product.ProductMapper;
 import com.moabam.api.domain.bug.BugHistory;
 import com.moabam.api.domain.bug.BugType;
 import com.moabam.api.domain.bug.repository.BugHistorySearchRepository;
+import com.moabam.api.domain.coupon.Coupon;
+import com.moabam.api.domain.coupon.repository.CouponRepository;
 import com.moabam.api.domain.member.Member;
+import com.moabam.api.domain.payment.Payment;
+import com.moabam.api.domain.payment.repository.PaymentRepository;
 import com.moabam.api.domain.product.Product;
 import com.moabam.api.domain.product.repository.ProductRepository;
 import com.moabam.api.dto.bug.BugResponse;
 import com.moabam.api.dto.bug.TodayBugResponse;
 import com.moabam.api.dto.product.ProductsResponse;
+import com.moabam.api.dto.product.PurchaseProductRequest;
+import com.moabam.api.dto.product.PurchaseProductResponse;
 import com.moabam.global.common.util.ClockHolder;
+import com.moabam.global.error.exception.NotFoundException;
 
 import lombok.RequiredArgsConstructor;
 
@@ -32,6 +42,8 @@ public class BugService {
 	private final MemberService memberService;
 	private final BugHistorySearchRepository bugHistorySearchRepository;
 	private final ProductRepository productRepository;
+	private final PaymentRepository paymentRepository;
+	private final CouponRepository couponRepository;
 	private final ClockHolder clockHolder;
 
 	public BugResponse getBug(Long memberId) {
@@ -54,10 +66,31 @@ public ProductsResponse getBugProducts() {
 		return ProductMapper.toProductsResponse(products);
 	}
 
+	@Transactional
+	public PurchaseProductResponse purchaseBugProduct(Long memberId, Long productId, PurchaseProductRequest request) {
+		Product product = getById(productId);
+		Payment payment = PaymentMapper.toEntity(memberId, product);
+
+		if (!isNull(request.couponId())) {
+			// TODO: (임시) CouponWallet 에 존재하는 할인 쿠폰인지 확인 @홍혁준
+			Coupon coupon = couponRepository.findById(request.couponId())
+				.orElseThrow(() -> new NotFoundException(NOT_FOUND_COUPON));
+			payment.applyCoupon(coupon);
+		}
+		paymentRepository.save(payment);
+
+		return ProductMapper.toPurchaseProductResponse(payment);
+	}
+
 	private int calculateBugQuantity(List<BugHistory> bugHistory, BugType bugType) {
 		return bugHistory.stream()
 			.filter(history -> bugType.equals(history.getBugType()))
 			.mapToInt(BugHistory::getQuantity)
 			.sum();
 	}
+
+	private Product getById(Long productId) {
+		return productRepository.findById(productId)
+			.orElseThrow(() -> new NotFoundException(PRODUCT_NOT_FOUND));
+	}
 }

src/main/java/com/moabam/api/application/payment/PaymentMapper.java

@@ -0,0 +1,25 @@
+package com.moabam.api.application.payment;
+
+import com.moabam.api.domain.payment.Order;
+import com.moabam.api.domain.payment.Payment;
+import com.moabam.api.domain.product.Product;
+
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public final class PaymentMapper {
+
+	public static Payment toEntity(Long memberId, Product product) {
+		Order order = Order.builder()
+			.name(product.getName())
+			.amount(product.getPrice())
+			.build();
+
+		return Payment.builder()
+			.memberId(memberId)
+			.product(product)
+			.order(order)
+			.build();
+	}
+}

src/main/java/com/moabam/api/application/product/ProductMapper.java

@@ -2,9 +2,11 @@
 
 import java.util.List;
 
+import com.moabam.api.domain.payment.Payment;
 import com.moabam.api.domain.product.Product;
 import com.moabam.api.dto.product.ProductResponse;
 import com.moabam.api.dto.product.ProductsResponse;
+import com.moabam.api.dto.product.PurchaseProductResponse;
 import com.moabam.global.common.util.StreamUtils;
 
 import lombok.AccessLevel;
@@ -28,4 +30,12 @@ public static ProductsResponse toProductsResponse(List<Product> products) {
 			.products(StreamUtils.map(products, ProductMapper::toProductResponse))
 			.build();
 	}
+
+	public static PurchaseProductResponse toPurchaseProductResponse(Payment payment) {
+		return PurchaseProductResponse.builder()
+			.paymentId(payment.getId())
+			.orderName(payment.getOrder().getName())
+			.price(payment.getOrder().getAmount())
+			.build();
+	}
 }

src/main/java/com/moabam/api/domain/payment/Order.java

@@ -0,0 +1,50 @@
+package com.moabam.api.domain.payment;
+
+import static com.moabam.global.error.model.ErrorMessage.*;
+import static java.lang.Math.*;
+import static java.util.Objects.*;
+
+import com.moabam.global.error.exception.BadRequestException;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Embeddable;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Embeddable
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Order {
+
+	private static final int MIN_AMOUNT = 0;
+
+	@Column(name = "order_id")
+	private String id;
+
+	@Column(name = "order_name", nullable = false)
+	private String name;
+
+	@Column(name = "amount", nullable = false)
+	private int amount;
+
+	@Builder
+	private Order(String id, String name, int amount) {
+		this.id = id;
+		this.name = requireNonNull(name);
+		this.amount = validateAmount(amount);
+	}
+
+	private int validateAmount(int amount) {
+		if (amount < MIN_AMOUNT) {
+			throw new BadRequestException(INVALID_ORDER_AMOUNT);
+		}
+
+		return amount;
+	}
+
+	public void discountAmount(int price) {
+		this.amount = max(MIN_AMOUNT, amount - price);
+	}
+}

src/main/java/com/moabam/api/domain/payment/Payment.java

@@ -0,0 +1,73 @@
+package com.moabam.api.domain.payment;
+
+import static java.util.Objects.*;
+
+import com.moabam.api.domain.coupon.Coupon;
+import com.moabam.api.domain.product.Product;
+import com.moabam.global.common.entity.BaseTimeEntity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Embedded;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@Table(name = "payment")
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Payment extends BaseTimeEntity {
+
+	@Id
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
+	@Column(name = "id")
+	private Long id;
+
+	@Column(name = "member_id", updatable = false, nullable = false)
+	private Long memberId;
+
+	@ManyToOne(fetch = FetchType.LAZY)
+	@JoinColumn(name = "product_id", updatable = false, nullable = false)
+	private Product product;
+
+	@ManyToOne(fetch = FetchType.LAZY)
+	@JoinColumn(name = "coupon_id")
+	private Coupon coupon;
+
+	@Embedded
+	private Order order;
+
+	@Column(name = "payment_key")
+	private String paymentKey;
+
+	@Enumerated(value = EnumType.STRING)
+	@Column(name = "status", nullable = false)
+	private PaymentStatus status;
+
+	@Builder
+	public Payment(Long memberId, Product product, Coupon coupon, Order order, String paymentKey,
+		PaymentStatus status) {
+		this.memberId = requireNonNull(memberId);
+		this.product = requireNonNull(product);
+		this.coupon = coupon;
+		this.order = requireNonNull(order);
+		this.paymentKey = paymentKey;
+		this.status = requireNonNullElse(status, PaymentStatus.REQUEST);
+	}
+
+	public void applyCoupon(Coupon coupon) {
+		this.order.discountAmount(coupon.getPoint());
+		this.coupon = coupon;
+	}
+}

src/main/java/com/moabam/api/domain/payment/PaymentStatus.java

@@ -0,0 +1,10 @@
+package com.moabam.api.domain.payment;
+
+public enum PaymentStatus {
+
+	// 임시
+	REQUEST,
+	DONE,
+	FAIL,
+	REFUND;
+}

src/main/java/com/moabam/api/domain/payment/repository/PaymentRepository.java

@@ -0,0 +1,9 @@
+package com.moabam.api.domain.payment.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+
+import com.moabam.api.domain.payment.Payment;
+
+public interface PaymentRepository extends JpaRepository<Payment, Long> {
+
+}

src/main/java/com/moabam/api/dto/product/PurchaseProductRequest.java

@@ -0,0 +1,9 @@
+package com.moabam.api.dto.product;
+
+import javax.annotation.Nullable;
+
+public record PurchaseProductRequest(
+	@Nullable Long couponId
+) {
+
+}

src/main/java/com/moabam/api/dto/product/PurchaseProductResponse.java

@@ -0,0 +1,12 @@
+package com.moabam.api.dto.product;
+
+import lombok.Builder;
+
+@Builder
+public record PurchaseProductResponse(
+	Long paymentId,
+	String orderName,
+	int price
+) {
+
+}

src/main/java/com/moabam/api/presentation/BugController.java

@@ -2,6 +2,9 @@
 
 import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestController;
@@ -10,6 +13,8 @@
 import com.moabam.api.dto.bug.BugResponse;
 import com.moabam.api.dto.bug.TodayBugResponse;
 import com.moabam.api.dto.product.ProductsResponse;
+import com.moabam.api.dto.product.PurchaseProductRequest;
+import com.moabam.api.dto.product.PurchaseProductResponse;
 import com.moabam.global.auth.annotation.CurrentMember;
 import com.moabam.global.auth.model.AuthorizationMember;
 
@@ -39,4 +44,12 @@ public TodayBugResponse getTodayBug(@CurrentMember AuthorizationMember member) {
 	public ProductsResponse getBugProducts() {
 		return bugService.getBugProducts();
 	}
+
+	@PostMapping("/products/{productId}/purchase")
+	@ResponseStatus(HttpStatus.OK)
+	public PurchaseProductResponse purchaseBugProduct(@CurrentMember AuthorizationMember member,
+		@PathVariable Long productId,
+		@RequestBody PurchaseProductRequest request) {
+		return bugService.purchaseBugProduct(member.id(), productId, request);
+	}
 }

src/main/java/com/moabam/global/error/model/ErrorMessage.java

@@ -47,6 +47,9 @@ public enum ErrorMessage {
 	INVALID_PRICE("가격은 0 이상이어야 합니다."),
 	INVALID_QUANTITY("수량은 1 이상이어야 합니다."),
 	INVALID_LEVEL("레벨은 1 이상이어야 합니다."),
+	INVALID_ORDER_AMOUNT("주문 금액은 0 이상이어야 합니다."),
+
+	PRODUCT_NOT_FOUND("존재하지 않는 상품입니다."),
 
 	FAILED_FCM_INIT("파이어베이스 설정을 실패했습니다."),
 	NOT_FOUND_FCM_TOKEN("해당 유저는 접속 중이 아닙니다."),

src/main/resources/static/docs/coupon.html

@@ -461,7 +461,7 @@ <h4 id="_요청" class="discrete">요청</h4>
 <div class="content">
 <pre class="highlight nowrap"><code class="language-http" data-lang="http">POST /admins/coupons HTTP/1.1
 Content-Type: application/json;charset=UTF-8
-Content-Length: 200
+Content-Length: 192
 Host: localhost:8080
 
 {
@@ -483,7 +483,7 @@ <h4 id="_응답" class="discrete">응답</h4>
 Vary: Access-Control-Request-Method
 Vary: Access-Control-Request-Headers
 Content-Type: application/json
-Content-Length: 64
+Content-Length: 62
 
 {
   "message" : "쿠폰의 이름이 중복되었습니다."
@@ -514,7 +514,7 @@ <h4 id="_응답_2" class="discrete">응답</h4>
 Vary: Access-Control-Request-Method
 Vary: Access-Control-Request-Headers
 Content-Type: application/json
-Content-Length: 58
+Content-Length: 56
 
 {
   "message" : "존재하지 않는 쿠폰입니다."
@@ -546,7 +546,7 @@ <h4 id="_응답_3" class="discrete">응답</h4>
 Vary: Access-Control-Request-Method
 Vary: Access-Control-Request-Headers
 Content-Type: application/json
-Content-Length: 58
+Content-Length: 56
 
 {
   "message" : "존재하지 않는 쿠폰입니다."
@@ -569,7 +569,7 @@ <h4 id="_요청_4">요청</h4>
 <div class="content">
 <pre class="highlight nowrap"><code class="language-http" data-lang="http">POST /coupons/search HTTP/1.1
 Content-Type: application/json;charset=UTF-8
-Content-Length: 88
+Content-Length: 84
 Host: localhost:8080
 
 {
@@ -627,7 +627,7 @@ <h3 id="_쿠폰_사용_진행_중">쿠폰 사용 (진행 중)</h3>
 <div id="footer">
 <div id="footer-text">
 Version 0.0.1-SNAPSHOT<br>
-Last updated 2023-11-16 18:30:03 +0900
+Last updated 2023-11-13 18:48:03 +0900
 </div>
 </div>
 </body>