Open-IM-Server/pkg/common/log/color.go

// Copyright © 2023 OpenIM. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package log

import (
	"fmt"

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

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

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

	_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())
	}
}

// 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)
}