first commit

services/kospi200_service.go

@@ -0,0 +1,106 @@
+package services
+
+import (
+	"encoding/json"
+	"fmt"
+	"stocksearch/models"
+	"time"
+)
+
+// Kospi200Service 코스피200 종목 조회 서비스
+type Kospi200Service struct {
+	kiwoom *KiwoomClient
+	cache  *CacheService
+}
+
+var kospi200Svc *Kospi200Service
+
+// GetKospi200Service 코스피200 서비스 싱글턴 반환
+func GetKospi200Service() *Kospi200Service {
+	if kospi200Svc == nil {
+		kospi200Svc = &Kospi200Service{
+			kiwoom: GetKiwoomClient(),
+			cache:  GetCacheService(),
+		}
+	}
+	return kospi200Svc
+}
+
+// GetStocks ka20002: 코스피200 구성종목 전체 조회 (연속조회, 캐시 1분)
+func (s *Kospi200Service) GetStocks() ([]models.Kospi200Stock, error) {
+	const cacheKey = "kospi200_stocks"
+	if cached, ok := s.cache.Get(cacheKey); ok {
+		if stocks, ok := cached.([]models.Kospi200Stock); ok {
+			return stocks, nil
+		}
+	}
+
+	var all []models.Kospi200Stock
+	contYn, nextKey := "N", ""
+
+	for {
+		body, nextContYn, nextNextKey, err := s.kiwoom.postPaged(
+			"ka20002", "/api/dostk/sect",
+			map[string]string{
+				"mrkt_tp": "0",   // 코스피
+				"inds_cd": "201", // KOSPI200
+				"stex_tp": "1",   // KRX
+			},
+			contYn, nextKey,
+		)
+		if err != nil {
+			return nil, fmt.Errorf("코스피200 조회 실패: %w", err)
+		}
+
+		var result struct {
+			IndsStkpc []struct {
+				StkCd      string `json:"stk_cd"`
+				StkNm      string `json:"stk_nm"`
+				CurPrc     string `json:"cur_prc"`
+				PredPreSig string `json:"pred_pre_sig"`
+				PredPre    string `json:"pred_pre"`
+				FluRt      string `json:"flu_rt"`
+				NowTrdeQty string `json:"now_trde_qty"`
+				OpenPric   string `json:"open_pric"`
+				HighPric   string `json:"high_pric"`
+				LowPric    string `json:"low_pric"`
+			} `json:"inds_stkpc"`
+			ReturnCode int    `json:"return_code"`
+			ReturnMsg  string `json:"return_msg"`
+		}
+		if err := json.Unmarshal(body, &result); err != nil {
+			return nil, fmt.Errorf("코스피200 응답 파싱 실패: %w", err)
+		}
+		if result.ReturnCode != 0 {
+			return nil, fmt.Errorf("코스피200 조회 실패: %s", result.ReturnMsg)
+		}
+
+		for _, s := range result.IndsStkpc {
+			// 종목코드·종목명이 없는 행은 건너뜀
+			if s.StkCd == "" || s.StkNm == "" {
+				continue
+			}
+			all = append(all, models.Kospi200Stock{
+				Code:       s.StkCd,
+				Name:       s.StkNm,
+				CurPrc:     absParseIntSafe(s.CurPrc),
+				PredPreSig: s.PredPreSig,
+				PredPre:    parseIntSafe(s.PredPre),
+				FluRt:      parseFloatSafe(s.FluRt),
+				Volume:     absParseIntSafe(s.NowTrdeQty),
+				Open:       absParseIntSafe(s.OpenPric),
+				High:       absParseIntSafe(s.HighPric),
+				Low:        absParseIntSafe(s.LowPric),
+			})
+		}
+
+		// 연속조회 종료 조건
+		if nextContYn != "Y" || nextNextKey == "" {
+			break
+		}
+		contYn, nextKey = nextContYn, nextNextKey
+	}
+
+	s.cache.Set(cacheKey, all, time.Minute)
+	return all, nil
+}