first commit

services/stock_service.go

@@ -0,0 +1,103 @@
+package services
+
+import (
+	"fmt"
+	"stocksearch/models"
+	"time"
+)
+
+// StockService 주식 비즈니스 로직 (캐시 + 키움 API 조합)
+type StockService struct {
+	kiwoom *KiwoomClient
+	cache  *CacheService
+}
+
+var stockSvc *StockService
+
+// GetStockService 주식 서비스 싱글턴 반환
+func GetStockService() *StockService {
+	if stockSvc == nil {
+		stockSvc = &StockService{
+			kiwoom: GetKiwoomClient(),
+			cache:  GetCacheService(),
+		}
+	}
+	return stockSvc
+}
+
+// GetCurrentPrice 현재가 조회 (1초 캐시 적용)
+func (s *StockService) GetCurrentPrice(stockCode string) (*models.StockPrice, error) {
+	cacheKey := "price:" + stockCode
+	if cached, ok := s.cache.Get(cacheKey); ok {
+		if price, ok := cached.(*models.StockPrice); ok {
+			return price, nil
+		}
+	}
+
+	price, err := s.kiwoom.GetCurrentPrice(stockCode)
+	if err != nil {
+		return nil, fmt.Errorf("현재가 조회 실패 [%s]: %w", stockCode, err)
+	}
+
+	s.cache.Set(cacheKey, price, 30*time.Second)
+	return price, nil
+}
+
+// GetDailyChart 일봉 데이터 조회 (5분 캐시 적용)
+func (s *StockService) GetDailyChart(stockCode string) ([]models.CandleData, error) {
+	cacheKey := "chart:daily:" + stockCode
+	if cached, ok := s.cache.Get(cacheKey); ok {
+		if candles, ok := cached.([]models.CandleData); ok {
+			return candles, nil
+		}
+	}
+
+	candles, err := s.kiwoom.GetDailyChart(stockCode)
+	if err != nil {
+		return nil, fmt.Errorf("일봉 조회 실패 [%s]: %w", stockCode, err)
+	}
+
+	s.cache.Set(cacheKey, candles, 5*time.Minute)
+	return candles, nil
+}
+
+// GetMinuteChart 분봉 데이터 조회 (30초 캐시 적용)
+func (s *StockService) GetMinuteChart(stockCode string, minutes int) ([]models.CandleData, error) {
+	cacheKey := fmt.Sprintf("chart:minute%d:%s", minutes, stockCode)
+	if cached, ok := s.cache.Get(cacheKey); ok {
+		if candles, ok := cached.([]models.CandleData); ok {
+			return candles, nil
+		}
+	}
+
+	candles, err := s.kiwoom.GetMinuteChart(stockCode, minutes)
+	if err != nil {
+		return nil, fmt.Errorf("분봉 조회 실패 [%s]: %w", stockCode, err)
+	}
+
+	s.cache.Set(cacheKey, candles, 30*time.Second)
+	return candles, nil
+}
+
+// GetTopFluctuation 상위 등락률 종목 조회 (1분 캐시 적용)
+func (s *StockService) GetTopFluctuation(market string, ascending bool, count int) ([]models.StockPrice, error) {
+	dir := "up"
+	if ascending {
+		dir = "down"
+	}
+	cacheKey := fmt.Sprintf("fluctuation:%s:%s:%d", market, dir, count)
+
+	if cached, ok := s.cache.Get(cacheKey); ok {
+		if stocks, ok := cached.([]models.StockPrice); ok {
+			return stocks, nil
+		}
+	}
+
+	stocks, err := s.kiwoom.GetTopFluctuation(market, ascending, count)
+	if err != nil {
+		return nil, fmt.Errorf("등락률 조회 실패: %w", err)
+	}
+
+	s.cache.Set(cacheKey, stocks, 1*time.Minute)
+	return stocks, nil
+}