Use slog logger.

bot.go

@@ -6,6 +6,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"log/slog"
 	"net/http"
 	"net/url"
 )
@@ -37,7 +38,7 @@ func NewBot(token string, opts ...Option) (*Bot, error) {
 	options := Options{
 		limit:      100,
 		timeout:    25,
-		logger:     newLogger("[micha] "),
+		logger:     slog.Default(),
 		apiServer:  defaultAPIServer,
 		httpClient: http.DefaultClient,
 		ctx:        context.Background(),
@@ -178,7 +179,7 @@ func (bot *Bot) Start(allowedUpdates ...string) {
 	for {
 		updates, err := bot.getUpdates(bot.offset+1, allowedUpdates...)
 		if err != nil {
-			bot.logger.Printf("Get updates error (%s)\n", err.Error())
+			bot.logger.ErrorContext(bot.ctx, "Get updates error", "error", err)
 		}
 
 		for _, update := range updates {

bot_test.go

@@ -5,7 +5,7 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"log"
+	"log/slog"
 	"net/http"
 	"net/url"
 	"os"
@@ -30,7 +30,7 @@ func (s *BotTestSuite) SetupSuite() {
 		Options: Options{
 			limit:      100,
 			timeout:    25,
-			logger:     newLogger("micha"),
+			logger:     slog.Default(),
 			apiServer:  defaultAPIServer,
 			httpClient: http.DefaultClient,
 		},
@@ -132,10 +132,10 @@ func (s *BotTestSuite) TestNewBot() {
 	s.Require().NotNil(bot)
 	s.Require().Equal(25, bot.timeout)
 	s.Require().Equal(100, bot.limit)
-	s.Require().Equal(newLogger("[micha] "), bot.logger)
+	s.Require().Equal(slog.Default(), bot.logger)
 
 	// With options
-	logger := log.New(os.Stderr, "", log.LstdFlags)
+	logger := slog.New(slog.NewTextHandler(os.Stderr, nil))
 	httpClient := &http.Client{}
 	bot, err = NewBot("111", WithLimit(50), WithTimeout(10), WithLogger(logger), WithHttpClient(httpClient))
 	s.Require().Nil(err)

go.mod

@@ -1,6 +1,6 @@
 module github.com/onrik/micha
 
-go 1.19
+go 1.22
 
 require (
 	github.com/jarcoal/httpmock v1.3.1

logger.go

@@ -1,16 +1,10 @@
 package micha
 
 import (
-	"log"
-	"os"
+	"context"
 )
 
 // Logger interface
 type Logger interface {
-	Println(v ...interface{})
-	Printf(format string, v ...interface{})
-}
-
-func newLogger(prefix string) Logger {
-	return log.New(os.Stderr, prefix, log.Ldate|log.Ltime|log.Lshortfile)
+	ErrorContext(ctx context.Context, msg string, args ...any)
 }