Refactor vmess internal struct for better readability

log/log.go

@@ -0,0 +1,45 @@
+package log
+
+import (
+	"errors"
+	"fmt"
+	"log"
+)
+
+const (
+	DebugLevel   = LogLevel(0)
+	InfoLevel    = LogLevel(1)
+	WarningLevel = LogLevel(2)
+	ErrorLevel   = LogLevel(3)
+)
+
+var logLevel = WarningLevel
+
+type LogLevel int
+
+func SetLogLevel(level LogLevel) {
+	logLevel = level
+}
+
+func writeLog(data string, level LogLevel) {
+	if level < logLevel {
+		return
+	}
+	log.Print(data)
+}
+
+func Info(format string, v ...interface{}) {
+	data := fmt.Sprintf(format, v)
+	writeLog("[Info]"+data, InfoLevel)
+}
+
+func Warning(format string, v ...interface{}) {
+	data := fmt.Sprintf(format, v)
+	writeLog("[Warning]"+data, WarningLevel)
+}
+
+func Error(format string, v ...interface{}) error {
+	data := fmt.Sprintf(format, v)
+	writeLog("[Error]"+data, ErrorLevel)
+	return errors.New(data)
+}