기능개선

internal/path/path.go

@@ -2,23 +2,36 @@ package path
 
 import (
 	"fmt"
+	"os"
+	"sync"
 	"time"
+
+	"git.lhk.o-r.kr/freerer2/simple_backup/internal/constants"
 )
 
-// GetGroupByFolder: group-by 옵션에 따라 백업 경로 생성
+// GetGroupByFolder generates a backup path based on the groupBy option and time.
+// If groupBy is invalid or empty, it returns the basePath unchanged.
+//
+// Parameters:
+//   - basePath: the base directory path for backup
+//   - groupBy: grouping option (year, mon, day, hour, min, sec)
+//   - t: time to use for path generation
+//
+// Returns:
+//   - string: generated path based on groupBy option
 func GetGroupByFolder(basePath, groupBy string, t time.Time) string {
 	switch groupBy {
-	case "year":
+	case constants.GroupByYear:
 		return fmt.Sprintf("%s/%d", basePath, t.Year())
-	case "mon":
+	case constants.GroupByMonth:
 		return fmt.Sprintf("%s/%d%02d", basePath, t.Year(), t.Month())
-	case "day":
+	case constants.GroupByDay:
 		return fmt.Sprintf("%s/%d%02d%02d", basePath, t.Year(), t.Month(), t.Day())
-	case "hour":
+	case constants.GroupByHour:
 		return fmt.Sprintf("%s/%d%02d%02d_%02d", basePath, t.Year(), t.Month(), t.Day(), t.Hour())
-	case "min":
+	case constants.GroupByMin:
 		return fmt.Sprintf("%s/%d%02d%02d_%02d%02d", basePath, t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute())
-	case "sec":
+	case constants.GroupBySec:
 		return fmt.Sprintf("%s/%d%02d%02d_%02d%02d%02d", basePath, t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second())
 	case "":
 		return basePath
@@ -27,3 +40,39 @@ func GetGroupByFolder(basePath, groupBy string, t time.Time) string {
 		return basePath
 	}
 }
+
+// 디렉토리 캐시
+type DirCache struct {
+	sync.RWMutex
+	exists map[string]bool
+}
+
+func NewDirCache() *DirCache {
+	return &DirCache{
+		exists: make(map[string]bool),
+	}
+}
+
+func (c *DirCache) EnsureDir(path string) error {
+	c.RLock()
+	if c.exists[path] {
+		c.RUnlock()
+		return nil
+	}
+	c.RUnlock()
+
+	c.Lock()
+	defer c.Unlock()
+
+	// 다시 확인 (다른 고루틴이 생성했을 수 있음)
+	if c.exists[path] {
+		return nil
+	}
+
+	if err := os.MkdirAll(path, constants.DefaultFileMode); err != nil {
+		return err
+	}
+
+	c.exists[path] = true
+	return nil
+}