gologger/format.go

package gologger

import (
	"fmt"
	"strings"
)

const logTemplate = "[%s] %s : %s - %s\n"

func format(logEvent LogEvent) string {
	data := logEvent.Ts.Format("2006-01-02 15:04:05")
	msg := ""
	firstMsg := logEvent.Data[0]
	if isFormatString(firstMsg) {
		msg = fmt.Sprintf(firstMsg.(string), logEvent.Data[1:]...)
	} else {
		msg = sprint(logEvent.Data)
	}

	ret := fmt.Sprintf(logTemplate, data, logEvent.Category, getLogLevelStr(logEvent.Level), msg)
	return ret
}

func getLogLevelStr(level int) string {
	for name, slevel := range logLevelMap {
		if slevel == level {
			return strings.ToUpper(name)
		}
	}
	return "Unknown"
}

func isFormatString(f interface{}) bool {
	s, ok := f.(string)
	if !ok {
		return false
	}
	// 尝试使用空接口来格式化字符串
	m := fmt.Sprintf(s, []interface{}{}...)
	return strings.Index(m, "MISSING") != -1
}

func sprint(s []interface{}) string {
	str := make([]any, len(s))
	for i, v := range s {
		if i > 0 {
			str[i] = fmt.Sprintf(" %v", v)
		} else {
			str[i] = fmt.Sprintf("%v", v)
		}
	}
	return fmt.Sprint(str...)
}