level.go

// Copyright 2013, Örjan Persson. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package logging

import (
	"errors"
	"strings"
)

// ErrInvalidLogLevel is used when an invalid log level has been used.
var ErrInvalidLogLevel = errors.New("logger: invalid log level")

// Level defines all available log levels for log messages.
type Level int

// Log levels.
const (
	CRITICAL Level = iota
	ERROR
	WARNING
	NOTICE
	INFO
	DEBUG
)

var levelNames = []string{
	"CRITICAL",
	"ERROR",
	"WARNING",
	"NOTICE",
	"INFO",
	"DEBUG",
}

// String returns the string representation of a logging level.
func (p Level) String() string {
	return levelNames[p]
}

// LogLevel returns the log level from a string representation.
func LogLevel(level string) (Level, error) {
	for i, name := range levelNames {
		if strings.EqualFold(name, level) {
			return Level(i), nil
		}
	}
	return ERROR, ErrInvalidLogLevel
}