Merge pull request #27 from C4-ComeTrue/feature/opixxx_step3

Feature/opixxx step3

src/main/java/org/c4marathon/assignment/global/util/SettlementUtil.java

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+package org.c4marathon.assignment.global.util;
+
+import java.security.SecureRandom;
+
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class SettlementUtil {
+	private static final SecureRandom SECURE_RANDOM = new SecureRandom();
+
+	public static int getRandomInt(int range) {
+		return SECURE_RANDOM.nextInt(range);
+	}
+
+}

src/main/java/org/c4marathon/assignment/settlement/domain/Settlement.java

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+package org.c4marathon.assignment.settlement.domain;
+
+import static jakarta.persistence.FetchType.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.c4marathon.assignment.global.entity.BaseEntity;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.EnumType;
+import jakarta.persistence.Enumerated;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
+import lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Settlement extends BaseEntity {
+	@Id
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
+	@Column(name = "settlement_id")
+	private Long id;
+
+	private Long requestAccountId; //정산 요청한 계좌 ID
+
+	private int totalAmount; //총 정산 금액
+
+	private int amount; //내 정산 금액
+
+	@Enumerated(EnumType.STRING)
+	private SettlementType type;
+
+	@OneToMany(mappedBy = "settlement", fetch = LAZY, cascade = CascadeType.ALL)
+	private List<SettlementDetail> settlementDetails = new ArrayList<>();
+
+	@Builder
+	private Settlement(Long requestAccountId, int totalAmount, SettlementType type) {
+		this.requestAccountId = requestAccountId;
+		this.totalAmount = totalAmount;
+		this.type = type;
+	}
+
+	public static Settlement create(Long requestAccountId, int totalAmount, SettlementType type) {
+		return Settlement.builder()
+			.requestAccountId(requestAccountId)
+			.totalAmount(totalAmount)
+			.type(type)
+			.build();
+	}
+
+	public void setAmount(int amount) {
+		this.amount = amount;
+	}
+
+	public void addSettlementDetail(SettlementDetail settlementDetail) {
+		this.settlementDetails.add(settlementDetail);
+		settlementDetail.setSettlement(this);
+
+	}
+}

src/main/java/org/c4marathon/assignment/settlement/domain/SettlementDetail.java

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+package org.c4marathon.assignment.settlement.domain;
+
+import org.c4marathon.assignment.global.entity.BaseEntity;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+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 lombok.AccessLevel;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class SettlementDetail extends BaseEntity {
+
+	@Id
+	@GeneratedValue(strategy = GenerationType.IDENTITY)
+	@Column(name = "settlement_detail_id")
+	private Long id;
+
+	private Long accountId;
+
+	private int amount;
+
+	@ManyToOne(fetch = FetchType.LAZY)
+	@JoinColumn(name = "settlement_id", nullable = false)
+	private Settlement settlement;
+
+	@Builder
+	private SettlementDetail(Settlement settlement, Long accountId, int amount) {
+		this.settlement = settlement;
+		this.accountId = accountId;
+		this.amount = amount;
+	}
+
+	public static SettlementDetail create(Settlement settlement, Long accountId, int amount) {
+		SettlementDetail settlementDetail = SettlementDetail.builder()
+			.accountId(accountId)
+			.amount(amount)
+			.build();
+		settlement.addSettlementDetail(settlementDetail);
+		return settlementDetail;
+	}
+
+	public void setSettlement(Settlement settlement) {
+		this.settlement = settlement;
+	}
+}

src/main/java/org/c4marathon/assignment/settlement/domain/SettlementType.java

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+package org.c4marathon.assignment.settlement.domain;
+
+public enum SettlementType {
+	EQUAL,
+	RANDOM
+}

src/main/java/org/c4marathon/assignment/settlement/domain/repository/SettlementDetailRepository.java

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+package org.c4marathon.assignment.settlement.domain.repository;
+
+import java.util.List;
+
+import org.c4marathon.assignment.settlement.domain.SettlementDetail;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+public interface SettlementDetailRepository extends JpaRepository<SettlementDetail, Long> {
+
+	@Query("""
+		SELECT sd
+		FROM SettlementDetail sd
+		JOIN FETCH sd.settlement s
+		WHERE sd.accountId = :accountId
+	""")
+	List<SettlementDetail> findByAccountId(@Param("accountId") Long accountId);
+
+}
+

src/main/java/org/c4marathon/assignment/settlement/domain/repository/SettlementRepository.java

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+package org.c4marathon.assignment.settlement.domain.repository;
+
+import java.util.List;
+
+import org.c4marathon.assignment.settlement.domain.Settlement;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface SettlementRepository extends JpaRepository<Settlement, Long> {
+	List<Settlement> findByRequestAccountId(Long requestAccountId);
+}

src/main/java/org/c4marathon/assignment/settlement/dto/ReceivedSettlementResponse.java

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+package org.c4marathon.assignment.settlement.dto;
+
+public record ReceivedSettlementResponse(
+	Long settlementId,
+	Long requestAccountId,
+	int totalAmount,
+	Long myAccountId,
+	int mySettlementAmount
+) {
+
+}

src/main/java/org/c4marathon/assignment/settlement/dto/SettlementDetailInfo.java

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+package org.c4marathon.assignment.settlement.dto;
+
+public record SettlementDetailInfo(
+	Long settlementDetailId,
+	Long accountId,
+	int amount
+) {
+}

src/main/java/org/c4marathon/assignment/settlement/dto/SettlementRequest.java

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+package org.c4marathon.assignment.settlement.dto;
+
+import java.util.List;
+
+import org.c4marathon.assignment.settlement.domain.SettlementType;
+
+import jakarta.validation.constraints.Max;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.PositiveOrZero;
+
+public record SettlementRequest(
+
+	@PositiveOrZero
+	@Max(value = 100, message = "100명까지 정산이 가능합니다.")
+	int totalNumber,
+
+	@PositiveOrZero
+	int totalAmount,
+
+	@NotNull(message = "정산 인원을 추가해주세요.")
+	List<Long> accountIds,
+
+	@NotNull(message = "정산 타입을 선택해주세요.")
+	SettlementType type
+
+) {
+}

src/main/java/org/c4marathon/assignment/settlement/dto/SettlementResponse.java

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+package org.c4marathon.assignment.settlement.dto;
+
+import java.util.List;
+
+
+public record SettlementResponse(
+	Long settlementId,
+	Long requestAccountId,
+	int totalAmount,
+	List<SettlementDetailInfo> members
+) {
+}

src/main/java/org/c4marathon/assignment/settlement/presentation/SettlementController.java

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+package org.c4marathon.assignment.settlement.presentation;
+
+import java.util.List;
+
+import org.c4marathon.assignment.global.annotation.Login;
+import org.c4marathon.assignment.global.session.SessionMemberInfo;
+import org.c4marathon.assignment.settlement.dto.ReceivedSettlementResponse;
+import org.c4marathon.assignment.settlement.dto.SettlementRequest;
+import org.c4marathon.assignment.settlement.dto.SettlementResponse;
+import org.c4marathon.assignment.settlement.service.SettlementService;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+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.RestController;
+
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+
+@RestController
+@RequestMapping("/api")
+@RequiredArgsConstructor
+public class SettlementController {
+	private final SettlementService settlementService;
+
+	@PostMapping("/settle")
+	public ResponseEntity<Void> settle(
+		@Login SessionMemberInfo loginMember,
+		@RequestBody @Valid SettlementRequest request
+	) {
+		settlementService.createSettlement(loginMember.accountId(), request);
+		return ResponseEntity.ok().build();
+	}
+
+	@GetMapping("/settlements/requested")
+	public ResponseEntity<List<SettlementResponse>> getRequestedSettlements(@Login SessionMemberInfo loginMember) {
+		return ResponseEntity.ok().body(settlementService.getRequestedSettlements(loginMember.accountId()));
+	}
+
+	@GetMapping("/settlements/received")
+	public ResponseEntity<List<ReceivedSettlementResponse>> getReceivedSettlements(@Login SessionMemberInfo loginMember) {
+		return ResponseEntity.ok().body(settlementService.getReceivedSettlements(loginMember.accountId()));
+	}
+}