feat deal create

src/main/java/com/eum/bank/common/dto/request/DealRequestDTO.java

@@ -0,0 +1,22 @@
+package com.eum.bank.common.dto.request;
+
+import lombok.Builder;
+import lombok.Getter;
+
+public class DealRequestDTO {
+    @Builder
+    @Getter
+    public static class  Create{
+        //송금자 계좌번호
+        private String accountNumber;
+        // 비밀번호
+        private String password;
+        // 예치금 ( 지급해야 하는 금액 )
+        private Long deposit;
+        // 최대 인원수
+        private Long maxPeople;
+        // 글 id
+        private Long postId;
+    }
+
+}

src/main/java/com/eum/bank/common/dto/response/DealResponseDTO.java

@@ -0,0 +1,15 @@
+package com.eum.bank.common.dto.response;
+
+import jakarta.validation.GroupSequence;
+import lombok.Builder;
+import lombok.Getter;
+
+public class DealResponseDTO {
+
+    @Getter
+    @Builder
+    public static class Create {
+        // 거래 id
+        private Long id;
+    }
+}

src/main/java/com/eum/bank/controller/DealController.java

@@ -0,0 +1,48 @@
+package com.eum.bank.controller;
+
+import com.eum.bank.common.APIResponse;
+import com.eum.bank.common.dto.request.DealRequestDTO;
+import com.eum.bank.common.dto.response.DealResponseDTO;
+import com.eum.bank.domain.account.entity.Account;
+import com.eum.bank.service.AccountService;
+import com.eum.bank.service.DealService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/deal")
+@RequiredArgsConstructor
+public class DealController {
+    private final DealService dealService;
+    private final AccountService accountService;
+
+    @PostMapping("/create")
+    public ResponseEntity<?> create(@RequestBody DealRequestDTO.Create create) {
+
+        String accountNumber = create.getAccountNumber();
+        String password = create.getPassword();
+        Long deposit = create.getDeposit();
+        Long maxPeople = create.getMaxPeople();
+        Long postId = create.getPostId();
+
+        APIResponse<?> apiResponse = accountService.getAccount(accountNumber, password);
+
+        Account account = accountService.getAccount(accountNumber);
+
+        if (apiResponse.getStatus() == 200){
+            // 계좌가 존재하고 비밀번호가 일치하는 경우
+            // 거래 생성
+            dealService.createDeal(account, deposit, maxPeople, postId);
+        } else if (apiResponse.getStatus() == 400){
+            // 계좌가 존재하지 않는 경우
+            return ResponseEntity.badRequest().body(apiResponse);
+        } else if (apiResponse.getStatus() == 401){
+            // 비밀번호가 일치하지 않는 경우
+            return ResponseEntity.status(401).body(apiResponse);
+        }
+
+        APIResponse<DealResponseDTO.Create> response = new APIResponse<>();
+        return ResponseEntity.ok(response);
+    }
+}

src/main/java/com/eum/bank/repository/DealRepository.java

@@ -4,4 +4,5 @@
 import org.springframework.data.jpa.repository.JpaRepository;
 
 public interface DealRepository extends JpaRepository<Deal, Long> {
+
 }

src/main/java/com/eum/bank/service/AccountService.java

@@ -85,13 +85,17 @@ public APIResponse<AccountResponseDTO.AccountInfo> getAccount(String accountNumb
         if (!passwordEncoder.matches(password, account.getPassword())) {
             throw new IllegalArgumentException("Invalid password");
         }
+
         return APIResponse.of(SuccessCode.SELECT_SUCCESS, AccountResponseDTO.AccountInfo.builder()
                 .accountNumber(account.getAccountNumber())
                 .totalBudget(account.getTotalBudget())
                 .availableBudget(account.getAvailableBudget())
                 .build());
     }
 
+    public Account getAccount(String accountNumber) {
+        return accountRepository.findByAccountNumber(accountNumber).orElseThrow(() -> new IllegalArgumentException("Invalid account number"));
+    }
     // 자유송금
     //  1. 송금자 계좌, 수신자 계좌 상태 검증
     //  2. 송금자 잔액 확인

src/main/java/com/eum/bank/service/DealService.java

@@ -0,0 +1,30 @@
+package com.eum.bank.service;
+
+import com.eum.bank.common.APIResponse;
+import com.eum.bank.domain.account.entity.Account;
+import com.eum.bank.domain.deal.entity.Deal;
+import com.eum.bank.repository.DealRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class DealService {
+
+    private final DealRepository dealRepository;
+
+    // 거래 생성
+    public void createDeal(Account accountNumber, Long deposit, Long maxPeople, Long postId){
+        // 거래 생성
+        // 거래상태 a -> WAITING
+        Deal deal = Deal.builder()
+                .senderAccount(accountNumber)
+                .status("WAITING")
+                .deposit(deposit)
+                .numberOfPeople(maxPeople)
+                .postId(postId)
+                .build();
+
+        dealRepository.save(deal);
+    }
+}