Implemented updating inline keyboards.

cmd/test/main.go

@@ -60,21 +60,6 @@ var (
 		backButton,
 	)
 
-	incDecKeyboard = tg.NewKeyboard().Row(
-		tg.NewButton("+").ActionFunc(func(c *tg.Context) {
-			d := ExtractSessionData(c)
-			d.Counter++
-			c.Sendf("%d", d.Counter)
-		}),
-		tg.NewButton("-").ActionFunc(func(c *tg.Context) {
-			d := ExtractSessionData(c)
-			d.Counter--
-			c.Sendf("%d", d.Counter)
-		}),
-	).Row(
-		backButton,
-	)
-
 	sendLocationKeyboard = tg.NewKeyboard().Row(
 		tg.NewButton("Send location").
 			WithSendLocation(true).
@@ -101,7 +86,8 @@ WithInitFunc(func(c *tg.Context) {
 	c.Session.Data = &SessionData{}
 }).WithRootNode(tg.NewRootNode(
 	// The "/" widget.
-	tg.RenderFunc(func(c *tg.Context) tg.UI {return tg.UI {
+	tg.RenderFunc(func(c *tg.Context) tg.UI {
+		return tg.UI {
 			tg.NewMessage(fmt.Sprintf(
 				fmt.Sprint(
 					"Hello, %s!\n",
@@ -126,7 +112,8 @@ WithInitFunc(func(c *tg.Context) {
 						tg.NewButton("Send location").Go("/send-location"),
 					).Reply(),
 			),
-	}}),
+		}
+	}),
 
 	tg.NewNode(
 		"mutate-messages", tg.RenderFunc(func(c *tg.Context) tg.UI {
@@ -171,13 +158,58 @@ WithInitFunc(func(c *tg.Context) {
 
 	tg.NewNode(
 		"inc-dec", tg.RenderFunc(func(c *tg.Context) tg.UI {
+			var (
+				kbd *tg.InlineCompo
+				inline, std, onlyInc, onlyDec *tg.Inline
+			)
+
+
 			d := ExtractSessionData(c)
+			format := "Press the buttons to increment and decrement.\n" +
+				"Current counter value = %d"
+
+			incBtn := tg.NewButton("+").ActionFunc(func(c *tg.Context) {
+					d.Counter++
+					kbd.Text = fmt.Sprintf(format, d.Counter)
+					if d.Counter == 5 {
+						kbd.Inline = onlyDec
+					} else {
+						kbd.Inline = std
+					}
+					kbd.Update(c)
+				})
+			decBtn := tg.NewButton("-").ActionFunc(func(c *tg.Context) {
+					d.Counter--
+					kbd.Text = fmt.Sprintf(format, d.Counter)
+					if d.Counter == -5 {
+						kbd.Inline = onlyInc
+					} else {
+						kbd.Inline = std
+					}
+					kbd.Update(c)
+					//c.Sendf("%d", d.Counter)
+				})
+
+			onlyInc = tg.NewKeyboard().Row(incBtn).Inline()
+			onlyDec = tg.NewKeyboard().Row(decBtn).Inline()
+			std = tg.NewKeyboard().Row(incBtn, decBtn).Inline()
+
+			if d.Counter == 5 {
+				inline = onlyDec
+			} else if d.Counter == -5 {
+				inline = onlyInc
+			} else {
+				inline = std
+			}
+
+			kbd = tg.NewMessage(
+				fmt.Sprintf(format, d.Counter),
+			).Inline(inline)
+
 			return tg.UI{
-				tg.NewMessage(fmt.Sprintf(
+				kbd,
-					"Press the buttons to increment and decrement.\n" +
+				tg.NewMessage("").Reply(
-					"Current counter value = %d", d.Counter,
+					backKeyboard.Reply(),
-				)).Reply(
-					incDecKeyboard.Reply(),
 				),
 			}
 		}),

tg/inline.go

@@ -40,6 +40,16 @@ func (compo *InlineCompo) SendConfig(
 	return sendConfig
 }
 
+func (compo *InlineCompo) Update(c *Context) {
+	edit := tgbotapi.NewEditMessageTextAndMarkup(
+		c.Session.Id.ToApi(),
+		compo.Message.MessageID,
+		compo.Text,
+		compo.Inline.ToApi(),
+	)
+	c.Bot.Api.Send(edit)
+}
+
 // Implementing the Filterer interface.
 func (compo *InlineCompo) Filter(u *Update) bool {
 	if compo == nil || u.CallbackQuery == nil {