Constructors for keyboard and options, CallbackHandler

bot.go

@@ -36,5 +36,11 @@ func (b *bot) Update(u *echo.Update) {
 
 	b.lock.Lock()
 	defer b.lock.Unlock()
+	// defer func() {
+	// 	if r := recover(); r != nil {
+	// 		log.Printf("[%s] Recovered. Error: %s\n", upd.UpdateID.String(), r)
+	// 	}
+	// }()
+
 	b.handler(upd)
 }

dispatcher.go

@@ -2,6 +2,8 @@ package nechotron
 
 import (
 	"strings"
+
+	"github.com/NicoNex/echotron/v3"
 )
 
 type UpdateHandler func(u *Update) error
@@ -52,6 +54,22 @@ func (d *Dispatcher) HandleFilter(filter FilterFn, handler UpdateHandler) *Dispa
 	return d
 }
 
+func (d *Dispatcher) HandleCallback(callback string, handler UpdateHandler) *Dispatcher {
+	newHandler := func(u *Update) (bool, error) {
+		if !u.IsCallback() {
+			return false, nil
+		}
+		defer u.Bot.AnswerCallbackQuery(u.CallbackQuery.ID, &echotron.CallbackQueryOptions{})
+		if u.CallbackQuery.Data != callback {
+			return false, nil
+		}
+		err := handler(u)
+		return true, err
+	}
+	d.handlers = append(d.handlers, newHandler)
+	return d
+}
+
 func (d *Dispatcher) HandleReply(handler UpdateHandler) *Dispatcher {
 	newHandler := func(u *Update) (bool, error) {
 		if !u.IsMessage() {

keyboards.go

@@ -6,6 +6,10 @@ type InKeyboard struct {
 	Buttons [][]echotron.InlineKeyboardButton
 }
 
+func NewInlineKeyboard() *InKeyboard {
+	return &InKeyboard{}
+}
+
 func (i *InKeyboard) Row(buttons ...echotron.InlineKeyboardButton) *InKeyboard {
 	i.Buttons = append(i.Buttons, buttons)
 	return i

options.go

@@ -16,6 +16,10 @@ type OptionsBuilder struct {
 	hasSpoiler               bool
 }
 
+func NewOptions() *OptionsBuilder {
+	return &OptionsBuilder{}
+}
+
 func (o *OptionsBuilder) Caption(text string) *OptionsBuilder {
 	o.caption = text
 	return o