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zap_color_console.go
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zap_color_console.go
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// MIT License
//
// Copyright (c) 2023 Wilbur Carmon II
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package otzap
import (
"fmt"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
"os"
)
const (
consoleColorBlack = 30
consoleColorBlue = 34
consoleColorGreen = 32
consoleColorRed = 31
consoleColorYellow = 33
)
// NewPrettyConsoleCore builds a Core which prints to stdout in a pretty format
// Inspired by zerolog's console writer
func NewPrettyConsoleCore(minLevel zapcore.Level) zapcore.Core {
cfg := zap.NewDevelopmentEncoderConfig()
cfg.ConsoleSeparator = " "
cfg.EncodeLevel = ColorConsoleLevelEncoder
cfg.EncodeTime = zapcore.TimeEncoderOfLayout("3:04:05PM")
return zapcore.NewCore(
zapcore.NewConsoleEncoder(cfg),
zapcore.Lock(os.Stdout),
minLevel)
}
// ColorConsoleLevelEncoder adds color and uses exactly 3-chars for level
func ColorConsoleLevelEncoder(
l zapcore.Level,
enc zapcore.PrimitiveArrayEncoder,
) {
s := ""
switch l {
case zapcore.DebugLevel:
s = fmt.Sprintf("\x1b[%dm%s\x1b[0m", uint8(consoleColorBlue), "DBG")
case zapcore.InfoLevel:
s = fmt.Sprintf("\x1b[%dm%s\x1b[0m", uint8(consoleColorGreen), "INF")
case zapcore.WarnLevel:
s = fmt.Sprintf("\x1b[%dm%s\x1b[0m", uint8(consoleColorYellow), "WRN")
case zapcore.ErrorLevel:
s = fmt.Sprintf("\x1b[%dm%s\x1b[0m", uint8(consoleColorRed), "ERR")
case zapcore.FatalLevel:
s = fmt.Sprintf("\x1b[%dm%s\x1b[0m", uint8(consoleColorRed), "FTL")
default:
s = fmt.Sprintf("\x1b[%dm%s\x1b[0m", uint8(consoleColorBlack), "LOG")
}
enc.AppendString(s)
}