first commit

services/order_service.go

@@ -0,0 +1,132 @@
+package services
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+// OrderService 주식 주문 서비스 (매수/매도/정정/취소)
+type OrderService struct {
+	client *KiwoomClient
+}
+
+var orderService *OrderService
+
+// GetOrderService 주문 서비스 싱글턴 반환
+func GetOrderService() *OrderService {
+	if orderService == nil {
+		orderService = &OrderService{client: GetKiwoomClient()}
+	}
+	return orderService
+}
+
+// OrderRequest 주문 요청 파라미터
+type OrderRequest struct {
+	Exchange string // KRX, NXT, SOR
+	Code     string // 종목코드
+	Qty      string // 주문수량
+	Price    string // 주문단가 (시장가 시 빈 문자열)
+	TradeTP  string // 0:보통, 3:시장가, 5:조건부지정가, 6:최유리, 7:최우선
+}
+
+// OrderResult 주문 응답
+type OrderResult struct {
+	OrderNo    string `json:"orderNo"`
+	ReturnCode int    `json:"returnCode"`
+	ReturnMsg  string `json:"returnMsg"`
+}
+
+// Buy 매수주문 (kt10000)
+func (s *OrderService) Buy(req OrderRequest) (*OrderResult, error) {
+	body := map[string]string{
+		"dmst_stex_tp": req.Exchange,
+		"stk_cd":       req.Code,
+		"ord_qty":      req.Qty,
+		"ord_uv":       req.Price,
+		"trde_tp":      req.TradeTP,
+		"cond_uv":      "",
+	}
+
+	respBody, err := s.client.post("kt10000", "/api/dostk/ordr", body)
+	if err != nil {
+		return nil, fmt.Errorf("매수주문 실패: %w", err)
+	}
+
+	return parseOrderResult(respBody)
+}
+
+// Sell 매도주문 (kt10001)
+func (s *OrderService) Sell(req OrderRequest) (*OrderResult, error) {
+	body := map[string]string{
+		"dmst_stex_tp": req.Exchange,
+		"stk_cd":       req.Code,
+		"ord_qty":      req.Qty,
+		"ord_uv":       req.Price,
+		"trde_tp":      req.TradeTP,
+		"cond_uv":      "",
+	}
+
+	respBody, err := s.client.post("kt10001", "/api/dostk/ordr", body)
+	if err != nil {
+		return nil, fmt.Errorf("매도주문 실패: %w", err)
+	}
+
+	return parseOrderResult(respBody)
+}
+
+// Modify 정정주문 (kt10002)
+func (s *OrderService) Modify(exchange, origOrdNo, code, qty, price string) (*OrderResult, error) {
+	body := map[string]string{
+		"dmst_stex_tp": exchange,
+		"orig_ord_no":  origOrdNo,
+		"stk_cd":       code,
+		"mdfy_qty":     qty,
+		"mdfy_uv":      price,
+		"mdfy_cond_uv": "",
+	}
+
+	respBody, err := s.client.post("kt10002", "/api/dostk/ordr", body)
+	if err != nil {
+		return nil, fmt.Errorf("정정주문 실패: %w", err)
+	}
+
+	return parseOrderResult(respBody)
+}
+
+// Cancel 취소주문 (kt10003)
+// qty: "0" = 전량취소
+func (s *OrderService) Cancel(exchange, origOrdNo, code, qty string) (*OrderResult, error) {
+	body := map[string]string{
+		"dmst_stex_tp": exchange,
+		"orig_ord_no":  origOrdNo,
+		"stk_cd":       code,
+		"cncl_qty":     qty,
+	}
+
+	respBody, err := s.client.post("kt10003", "/api/dostk/ordr", body)
+	if err != nil {
+		return nil, fmt.Errorf("취소주문 실패: %w", err)
+	}
+
+	return parseOrderResult(respBody)
+}
+
+// parseOrderResult 주문 응답 JSON 파싱 공통 함수
+func parseOrderResult(body []byte) (*OrderResult, error) {
+	var result struct {
+		OrdNo      string `json:"ord_no"`
+		ReturnCode int    `json:"return_code"`
+		ReturnMsg  string `json:"return_msg"`
+	}
+	if err := json.Unmarshal(body, &result); err != nil {
+		return nil, fmt.Errorf("주문 응답 파싱 실패: %w", err)
+	}
+	if result.ReturnCode != 0 {
+		return nil, fmt.Errorf("주문 오류: %s", result.ReturnMsg)
+	}
+	return &OrderResult{
+		OrderNo:    result.OrdNo,
+		ReturnCode: result.ReturnCode,
+		ReturnMsg:  result.ReturnMsg,
+	}, nil
+}