big refactoring

smtp/logger.go

@@ -0,0 +1,29 @@
+package smtp
+
+import (
+	"strings"
+)
+
+// loggerWrapper is a wrapper around logger.Logger to implement smtp.Logger interface
+type loggerWrapper struct {
+	log func(string, ...interface{})
+}
+
+func (l loggerWrapper) Printf(format string, v ...interface{}) {
+	l.log(format, v...)
+}
+
+func (l loggerWrapper) Println(v ...interface{}) {
+	msg := strings.Repeat("%v ", len(v))
+	l.log(msg, v...)
+}
+
+// loggerWriter is a wrapper around io.Writer to implement io.Writer interface
+type loggerWriter struct {
+	log func(string)
+}
+
+func (l loggerWriter) Write(p []byte) (n int, err error) {
+	l.log(string(p))
+	return len(p), nil
+}