logger.go

package deej

import (
	"fmt"
	"time"

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

// NewLogger provides a logger instance for the whole program
func NewLogger() (*zap.SugaredLogger, error) {
	loggerConfig := zap.NewDevelopmentConfig()

	// make it colorful
	loggerConfig.EncoderConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder

	// make it readable
	loggerConfig.EncoderConfig.EncodeCaller = nil
	loggerConfig.EncoderConfig.EncodeTime = func(t time.Time, enc zapcore.PrimitiveArrayEncoder) {
		enc.AppendString(t.Format("2006-01-02 15:04:05.000"))
	}

	loggerConfig.EncoderConfig.EncodeName = func(s string, enc zapcore.PrimitiveArrayEncoder) {
		enc.AppendString(fmt.Sprintf("%-27s", s))
	}

	logger, err := loggerConfig.Build()
	if err != nil {
		return nil, fmt.Errorf("create zap logger: %w", err)
	}

	// no reason not to use the sugared logger - it's fast enough for anything we're gonna do
	sugar := logger.Sugar()

	return sugar, nil
}