init server

internal/utils/logger.go

@@ -0,0 +1,74 @@
+package utils
+
+import (
+	"io"
+	"os"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+)
+
+const (
+	LogFormatText = "text"
+	LogFormatJSON = "json"
+
+	ContextKeyLogger = "logger"
+)
+
+var (
+	logLevel                   = logrus.DebugLevel
+	logFormat logrus.Formatter = &logrus.TextFormatter{}
+	logOut    io.Writer
+)
+
+func InitLogger(ll, lf string) {
+	logLevel = parseLogrusLevel(ll)
+	logrus.SetLevel(logLevel)
+
+	logFormat = parseLogrusFormat(lf)
+	logrus.SetFormatter(logFormat)
+
+	logOut = os.Stdout
+	logrus.SetOutput(logOut)
+}
+
+func GetLoggerFromCtx(c *gin.Context) *logrus.Entry {
+	if logger, ok := c.Get(ContextKeyLogger); ok {
+		logEntry, assertionOk := logger.(*logrus.Entry)
+		if assertionOk {
+			return logEntry
+		}
+	}
+	return logrus.NewEntry(GetLogger())
+}
+
+func GetLogger() *logrus.Logger {
+	logger := logrus.New()
+	logger.Formatter = logFormat
+	logger.Level = logLevel
+	logger.Out = logOut
+	return logger
+}
+
+func parseLogrusLevel(logLevelStr string) logrus.Level {
+	logLevel, err := logrus.ParseLevel(logLevelStr)
+	if err != nil {
+		logrus.WithError(err).Errorf("error while parsing log level. %v is set as default.", logLevel)
+		logLevel = logrus.DebugLevel
+	}
+	return logLevel
+}
+
+func parseLogrusFormat(logFormatStr string) logrus.Formatter {
+	var formatter logrus.Formatter
+	switch logFormatStr {
+	case LogFormatText:
+		formatter = &logrus.TextFormatter{ForceColors: true, FullTimestamp: true}
+	case LogFormatJSON:
+		formatter = &logrus.JSONFormatter{}
+	default:
+		logrus.Errorf("error while parsing log format. %v is set as default.", formatter)
+		formatter = &logrus.TextFormatter{ForceColors: true, FullTimestamp: true}
+	}
+	return formatter
+}