updated hlog

hlog/logfile.go

@@ -7,17 +7,45 @@ import (
 	"github.com/pkg/errors"
 )
 
-// Returns a pointer to a new log file with the specified path.
-// Remember to call file.Close() when finished writing to the log file
-func NewLogFile(path string) (*os.File, error) {
-	logPath := filepath.Join(path, "server.log")
-	file, err := os.OpenFile(
-		logPath,
-		os.O_APPEND|os.O_CREATE|os.O_WRONLY,
-		0663,
-	)
+// newLogFile creates or opens the log file based on the configuration.
+// The file is created in the specified directory with the configured filename.
+// File permissions are set to 0663 (rw-rw--w-).
+//
+// If append is true, the file is opened in append mode and new logs are added
+// to the end. If append is false, the file is truncated on open, overwriting
+// any existing content.
+//
+// Returns an error if the file cannot be opened or created.
+func newLogFile(dir, filename string, append bool) (*os.File, error) {
+	logPath := filepath.Join(dir, filename)
+
+	flags := os.O_CREATE | os.O_WRONLY
+	if append {
+		flags |= os.O_APPEND
+	} else {
+		flags |= os.O_TRUNC
+	}
+
+	file, err := os.OpenFile(logPath, flags, 0663)
 	if err != nil {
 		return nil, errors.Wrap(err, "os.OpenFile")
 	}
 	return file, nil
 }
+
+// CloseLogFile closes the underlying log file if one is open.
+// This should be called when shutting down the application to ensure
+// all buffered logs are flushed to disk.
+//
+// If no log file is open, this is a no-op and returns nil.
+// Returns an error if the file cannot be closed.
+func (l *Logger) CloseLogFile() error {
+	if l.logFile == nil {
+		return nil
+	}
+	err := l.logFile.Close()
+	if err != nil {
+		return err
+	}
+	return nil
+}