Improve: config convergent and add log-level

constant/log.go

@@ -0,0 +1,35 @@
+package constant
+
+var (
+	// LogLevelMapping is a mapping for LogLevel enum
+	LogLevelMapping = map[string]LogLevel{
+		"error":   ERROR,
+		"warning": WARNING,
+		"info":    INFO,
+		"debug":   DEBUG,
+	}
+)
+
+const (
+	ERROR LogLevel = iota
+	WARNING
+	INFO
+	DEBUG
+)
+
+type LogLevel int
+
+func (l LogLevel) String() string {
+	switch l {
+	case INFO:
+		return "info"
+	case WARNING:
+		return "warning"
+	case ERROR:
+		return "error"
+	case DEBUG:
+		return "debug"
+	default:
+		return "unknow"
+	}
+}