color.go

// This file is part of the Smart Home
// Program complex distribution https://github.com/e154/smart-home
// Copyright (C) 2016-2021, Filippov Alex
//
// This library is free software: you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library.  If not, see
// <https://www.gnu.org/licenses/>.

package logging

import (
	"fmt"

	"go.uber.org/zap/zapcore"
)

// Foreground colors.
const (
	// Black ...
	Black Color = iota + 30
	// Red ...
	Red
	// Green ...
	Green
	// Yellow ...
	Yellow
	// Blue ...
	Blue
	// Magenta ...
	Magenta
	// Cyan ...
	Cyan
	// White ...
	White
)

// Color represents a text color.
type Color uint8

// Add adds the coloring to the given string.
func (c Color) Add(s string) string {
	return fmt.Sprintf("\x1b[%dm%s\x1b[0m", uint8(c), s)
}

var (
	_levelToColor = map[zapcore.Level]Color{
		zapcore.DebugLevel:  White,
		zapcore.InfoLevel:   Green,
		zapcore.WarnLevel:   Yellow,
		zapcore.ErrorLevel:  Red,
		zapcore.DPanicLevel: Red,
		zapcore.PanicLevel:  Red,
		zapcore.FatalLevel:  Red,
	}
	_unknownLevelColor = Red

	_levelToLowercaseColorString = make(map[zapcore.Level]string, len(_levelToColor))
	_levelToCapitalColorString   = make(map[zapcore.Level]string, len(_levelToColor))
)

func init() {
	for level, color := range _levelToColor {
		_levelToLowercaseColorString[level] = color.Add(level.String())
		_levelToCapitalColorString[level] = color.Add(level.CapitalString())
	}
}