downloader/api/internal/app/infrastructure/logger/logger.go

package logger

import (
	"go.uber.org/zap"
	"go.uber.org/zap/zapcore"
	"os"
)

func New() *zap.SugaredLogger {
	consoleEncoder := zapcore.NewConsoleEncoder(zap.NewDevelopmentEncoderConfig())
	jsonEncoder := zapcore.NewJSONEncoder(zap.NewProductionEncoderConfig())

	lowPriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
		return lvl < zapcore.ErrorLevel
	})
	highPriority := zap.LevelEnablerFunc(func(lvl zapcore.Level) bool {
		return lvl >= zapcore.ErrorLevel
	})
	consoleDebugging := zapcore.Lock(os.Stdout)
	consoleErrors := zapcore.Lock(os.Stderr)
	core := zapcore.NewTee(
		zapcore.NewCore(jsonEncoder, consoleErrors, highPriority),
		zapcore.NewCore(jsonEncoder, consoleDebugging, highPriority),
		zapcore.NewCore(consoleEncoder, consoleErrors, highPriority),
		zapcore.NewCore(consoleEncoder, consoleDebugging, lowPriority),
	)
	logger := zap.New(core)
	defer func(logger *zap.Logger) {
		_ = logger.Sync()
	}(logger)
	sugaredLogger := logger.Sugar()
	return sugaredLogger
}