util/logger.go

package util

import (
	"log"
	"os"
)

// Logger logger
type Logger struct {
	FP  *os.File
	Log *log.Logger
}

var (
	deflog *Logger
)

// NewDefaultLogger defult logger
func NewDefaultLogger(path string) (*Logger, error) {
	var err error
	fp := &os.File{}
	if fp, err = os.OpenFile(path, os.O_RDWR|os.O_APPEND|os.O_CREATE, 0666); err != nil {
		return nil, err
	}

	deflog = &Logger{}
	deflog.FP = fp
	deflog.Log = log.New(fp, "[INFO]", log.LstdFlags)

	return deflog, err
}

// ReopenDefaultLogger re open default logger
func ReopenDefaultLogger(path string) (*Logger, error) {
	var err error
	fp := &os.File{}
	if fp, err = os.OpenFile(path, os.O_RDWR|os.O_APPEND|os.O_CREATE, 0666); err != nil {
		return nil, err
	}

	if deflog == nil {
		deflog = &Logger{}
	}
	fpo := deflog.FP
	deflog.FP = fp
	deflog.Log = log.New(fp, "[INFO]", log.LstdFlags)
	fpo.Close()

	return deflog, err
}

// CloseDefaultLogger close
func CloseDefaultLogger() error {
	return deflog.FP.Close()
}

// LogInfo log info
func LogInfo(v ...interface{}) {
	deflog.Log.SetPrefix("[INFO]")
	deflog.Log.Println(v...)
}

// LogDebug log debug
func LogDebug(v ...interface{}) {
	deflog.Log.SetPrefix("[DEBUG]")
	deflog.Log.Println(v...)
}

// NewLogger new
func NewLogger(path string) (logger *Logger, err error) {
	fp := &os.File{}
	if fp, err = os.OpenFile(path, os.O_RDWR|os.O_APPEND|os.O_CREATE, os.ModePerm); err != nil {
		return
	}

	logger.FP = fp
	logger.Log = log.New(fp, "[INFO]", log.Ldate|log.Ltime)

	return
}

// Close close
func (logger Logger) Close() error {
	return logger.FP.Close()
}

// Info log info
func (logger Logger) Info(v ...interface{}) {
	logger.Log.SetPrefix("[INFO]")
	logger.Log.Println(v...)
}

// Debug log debug
func (logger Logger) Debug(v ...interface{}) {
	logger.Log.SetPrefix("[DEBUG]")
	logger.Log.Println(v...)
}