feat: log support json format

Author: leeqvip

log/formatter/json_formatter.go

@@ -0,0 +1,35 @@
+package formatter
+
+import (
+	"encoding/json"
+	"github.com/forgoer/thinkgo/log/record"
+)
+
+type JsonFormatter struct {
+}
+
+func NewJsonFormatter() *JsonFormatter {
+	j := &JsonFormatter{}
+	return j
+}
+
+func (f *JsonFormatter) Format(r record.Record) string {
+	normalized := make(map[string]interface{})
+
+	normalized["message"] = r.Message
+	normalized["level"] = r.Level
+	normalized["level_name"] = r.LevelName
+	normalized["channel"] = r.Channel
+	normalized["datetime"] = r.Datetime.Local().Format("2006-01-02 15:04:05.000")
+
+	output, _ := json.Marshal(normalized)
+	return string(output) + "\n"
+}
+
+func (f *JsonFormatter) FormatBatch(rs []record.Record) string {
+	message := ""
+	for _, r := range rs {
+		message = message + f.Format(r)
+	}
+	return message
+}