console.go

// (c) 2022 Jacek Olszak
// This code is licensed under MIT license (see LICENSE for details)

// Package console provides yala adapters capable of logging using simplified console logger. This logger is meant
// to be used for development purposes only. It does not provide any knobs and switches. If you need customization, then
// please use real production-ready logger like zap, logrus or zerolog with appropriate adapter.
//
// The format of message produced by console adapters is:
//
//	LEVEL message key=value key=value error=error
package console

import (
	"fmt"
	"io"
	"os"

	"github.com/elgopher/yala/adapter/printer"
	"github.com/elgopher/yala/logger"
)

// StdoutAdapter returns a logger.Adapter implementation which prints log messages to stdout.
func StdoutAdapter() logger.Adapter {
	return printer.Adapter{Printer: WriterPrinter{os.Stdout}}
}

// StderrAdapter returns a logger.Adapter implementation which prints log messages to stderr.
func StderrAdapter() logger.Adapter {
	return printer.Adapter{Printer: WriterPrinter{os.Stderr}}
}

// WriterPrinter implements printer.Printer by adapting io.Writer. Should be used with care, because it discards all
// errors returned during writing.
type WriterPrinter struct {
	Writer io.Writer
}

// Println prints the msg using io.Writer. Errors are discarded.
func (p WriterPrinter) Println(skipCallerFrames int, msg string) {
	if p.Writer == nil {
		return
	}

	_, _ = fmt.Fprintln(p.Writer, msg)
}