Golang(Go語言)封裝一個簡單的控制檯輸出包

烟熏牛肉干發表於2024-06-04
// 定義6個常量,每個常量代表一個布林值為true的位置
const (
	LEVEL_DEBUG = 1 << iota
	LEVEL_INFO
	LEVEL_WARN
	LEVEL_ERROR
	LEVEL_FATAL
	PRINT_SRC_FILE
)

type consoleFunc func(format string, a ...any)

var printSrcFileEmptyFunc = func() {}

type Console struct {
	Debug consoleFunc
	Info  consoleFunc
	Warn  consoleFunc
	Error consoleFunc
	Fatal consoleFunc
}

func NewConsole(params int) *Console {
	levelDebug := params&LEVEL_DEBUG != 0
	levelInfo := params&LEVEL_INFO != 0
	levelWarn := params&LEVEL_WARN != 0
	levelError := params&LEVEL_ERROR != 0
	levelFatal := params&LEVEL_FATAL != 0
	srcFile := params&PRINT_SRC_FILE != 0
	result := &Console{
		Debug: func(format string, a ...any) {},
		Info:  func(format string, a ...any) {},
		Warn:  func(format string, a ...any) {},
		Error: func(format string, a ...any) {},
		Fatal: func(format string, a ...any) {},
	}
	if levelDebug {
		result.Debug = result.debugFunc
	}
	if levelInfo {
		result.Info = result.infoFunc
	}
	if levelWarn {
		result.Warn = result.warnFunc
	}
	if levelError {
		result.Error = result.errorFunc
	}
	if levelFatal {
		result.Fatal = result.fatalFunc
	}
	if srcFile {
		printSrcFileEmptyFunc = printSrcFileFunc
	}
	return result
}

// Log 列印日誌的函式
func output(level int, msg string) {
	// 格式化日誌等級字串,新增顏色
	levelStr := generateLevel(level)
	now := generateNowTime()
	printSrcFileEmptyFunc()
	fmt.Printf("%s |%s| %s\n", now, levelStr, msg)
}

// debugFunc 列印DEBUG等級的日誌
func (c *Console) debugFunc(format string, a ...any) {
	msg := fmt.Sprintf(format, a...)
	output(LEVEL_DEBUG, msg)
}

// infoFunc 列印INFO等級的日誌
func (c *Console) infoFunc(format string, a ...any) {
	msg := fmt.Sprintf(format, a...)
	output(LEVEL_INFO, msg)
}

// warningFunc 列印WARNING等級的日誌
func (c *Console) warnFunc(format string, a ...any) {
	msg := fmt.Sprintf(format, a...)
	output(LEVEL_WARN, msg)
}

// errorFunc 列印ERROR等級的日誌
func (c *Console) errorFunc(format string, a ...any) {
	msg := fmt.Sprintf(format, a...)
	output(LEVEL_ERROR, msg)
}

// fatalFunc 列印FATAL等級的日誌
func (c *Console) fatalFunc(format string, a ...any) {
	msg := fmt.Sprintf(format, a...)
	output(LEVEL_FATAL, msg)
}

func printSrcFileFunc() {
	_, file, line, ok := runtime.Caller(3) // 注意這裡要改為3,因為呼叫堆疊深入了一層(此處根據實際情況修改數值)
	if !ok {
		log.Println("無法獲取呼叫者資訊")
		return
	}
	fileStr := fmt.Sprintf("\033[1;95m%s:%d\033[0m", file, line)
	// 列印格式化的日誌
	fmt.Printf("%s\n", fileStr)
}

func generateNowTime() string {
	return time.Now().Format("2006-01-02 - 15:04:05.000")
}

func generateLevel(level int) string {
	// logColor 用於根據日誌等級設定背景色和文字色
	logColor := map[int]string{
		LEVEL_DEBUG: fmt.Sprintf("\033[44;97m%-5s\033[0m", "DEBUG"),  //
		LEVEL_INFO:  fmt.Sprintf("\033[102;97m%-5s\033[0m", "INFO"),  //
		LEVEL_WARN:  fmt.Sprintf("\033[103;97m%-5s\033[0m", "WARN"),  //
		LEVEL_ERROR: fmt.Sprintf("\033[101;97m%-5s\033[0m", "ERROR"), //
		LEVEL_FATAL: fmt.Sprintf("\033[41;97m%-5s\033[0m", "FATAL"),  //
	}
	return fmt.Sprintf(logColor[level])
}

呼叫方法:

func main() {
	c := NewConsole(31)
	c.Error("test error")
	c.Info("test info")
	c.Debug("test debug")
}

當傳入31時效果如下:

當傳入63時效果如下:

下面是列印日誌等級組合的數值:

相關文章