feat: watch playlists and download newly added tracks

internal/logger/logger.go

@@ -0,0 +1,29 @@
+package logger
+
+import "log"
+
+type Logger struct {
+	l *log.Logger
+}
+
+func New(l *log.Logger) *Logger {
+	return &Logger{l: l}
+}
+
+func (l *Logger) Infof(format string, args ...any) {
+	if l.l != nil {
+		l.l.Printf("[INFO] "+format, args...)
+	}
+}
+
+func (l *Logger) Warnf(format string, args ...any) {
+	if l.l != nil {
+		l.l.Printf("[WARN] "+format, args...)
+	}
+}
+
+func (l *Logger) Errorf(format string, args ...any) {
+	if l.l != nil {
+		l.l.Printf("[ERROR] "+format, args...)
+	}
+}