기능개선

internal/logger/logger.go

@@ -0,0 +1,32 @@
+package logger
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"sync"
+)
+
+type Logger struct {
+	verbose bool
+	writer  *bufio.Writer
+	mu      sync.Mutex
+}
+
+func New(verbose bool) *Logger {
+	return &Logger{
+		verbose: verbose,
+		writer:  bufio.NewWriter(os.Stdout),
+	}
+}
+
+func (l *Logger) Printf(format string, args ...interface{}) {
+	if !l.verbose {
+		return
+	}
+
+	l.mu.Lock()
+	_, _ = fmt.Fprintf(l.writer, format, args...)
+	_ = l.writer.Flush()
+	l.mu.Unlock()
+}