level.go

package logger

import "fmt"

// Level represents the logging level
type Level uint32

// These are the different logging levels.
const (
	// PanicLevel level, highest level of severity. Logs and then calls panic with the
	// message passed to Debug, Info, ...
	PanicLevel Level = iota
	// FatalLevel level. Logs and then calls `logger.Exit(1)`. It will exit even if the
	// logging level is set to Panic.
	FatalLevel
	// ErrorLevel level. Logs. Used for errors that should definitely be noted.
	// Commonly used for hooks to send errors to an error tracking service.
	ErrorLevel
	// WarnLevel level. Non-critical entries that deserve eyes.
	WarnLevel
	// InfoLevel level. General operational entries about what's going on inside the
	// application.
	InfoLevel
	// DebugLevel level. Usually only enabled when debugging. Very verbose logging.
	DebugLevel
)

// String returns the string representation of the logging level.
func (level Level) String() string {
	switch level {
	case DebugLevel:
		return "debug"
	case InfoLevel:
		return "info"
	case WarnLevel:
		return "warning"
	case ErrorLevel:
		return "error"
	case FatalLevel:
		return "fatal"
	case PanicLevel:
		return "panic"
	}

	return "unknown"
}

// ParseLevel parses a string level into a Level.
func ParseLevel(level string) (Level, error) {
	switch level {
	case "panic":
		return PanicLevel, nil
	case "fatal":
		return FatalLevel, nil
	case "error":
		return ErrorLevel, nil
	case "warn", "warning":
		return WarnLevel, nil
	case "info":
		return InfoLevel, nil
	case "debug":
		return DebugLevel, nil
	}

	var l Level
	return l, fmt.Errorf("not a valid Level: %q", level)
}