create/update main menu based on user's preferred language

I would like to customize the main menu texts based on the customer language preference, but I have not seen any document about how to create / update the main menu using java.

I can create Inline-Menu using the InlineKeyboardButton and InlineKeyboardMarkup classes.

I can create Keyboard-Buttons using the KeyboardRow, KeyboardButton and ReplyKeyboardMarkup classes.

But I can not see any documentation or example hot to create and configure the main Telegram menu button using Java.

This is how I create the inline-menu:

private void buildInlineMenu(SendMessage.SendMessageBuilder builder, ChatResponse chatResponse) {
    if (!chatResponse.getInlineMenus().isEmpty()) {
        List<InlineKeyboardButton> inlineButtons = new ArrayList<>();
        chatResponse.getInlineMenus().forEach(menu -> {
            var next = InlineKeyboardButton.builder()
                    .text(menu.getCaption())
                    .callbackData(menu.getCommand())
                    .build();
            inlineButtons.add(next);
        });

        InlineKeyboardMarkup markup = InlineKeyboardMarkup
                .builder()
                .keyboardRow(inlineButtons)
                .build();

        builder.replyMarkup(markup);
    }
}

link to image

My code that creates the keyboard:

private void buildKeyboard(SendMessage.SendMessageBuilder builder, ChatResponse chatResponse) {
    if (!chatResponse.getKeyboards().isEmpty()) {
        List<KeyboardRow> keyboard = new ArrayList<>();
        chatResponse.getKeyboards().forEach(b -> {
            String[] buttons = b.getCaption().split(";");
            KeyboardRow keyboardRow = new KeyboardRow();
            Arrays.stream(buttons).forEach(button -> {
                keyboardRow.add(new KeyboardButton(button));
            });
            keyboard.add(keyboardRow);
        });

        ReplyKeyboardMarkup markup = new ReplyKeyboardMarkup();
        markup.setSelective(true);
        markup.setResizeKeyboard(true);
        markup.setOneTimeKeyboard(false);
        markup.setKeyboard(keyboard);

        builder.replyMarkup(markup);
    }
}

link to image

How I call them:

(1)

ChatResponse.builder()
    .textMessage("Select a fruit! (inline menu)")
    .inlineMenus(List.of(
            ChatMenu.builder().caption("apple").command("apple").build(),
            ChatMenu.builder().caption("kiwi").command("kiwi").build(),
            ChatMenu.builder().caption("orange").command("orange").build()))
    .build();

(2)

ChatResponse.builder()
    .textMessage("What is your favourite color? (keyboard)")
    .keyboards(List.of(
            ChatMenu.builder().caption("Red;Blue").build(),
            ChatMenu.builder().caption("Green;Purple;White").build()))
    .build();

Calling:

SendMessage.SendMessageBuilder sendMessageBuilder = SendMessage
        .builder()
        .chatId(telegramId)
        .parseMode("HTML")
        .text(chatResponse.getTextMessage());

buildInlineMenu(sendMessageBuilder, chatResponse);
buildKeyboard(sendMessageBuilder, chatResponse);

execute(sendMessageBuilder.build());

The code above works like a charm but I want to create and configure the main menu as well from Java. I know that I can add the main menu using the BotFather menu from the Telegram chat, but I would like to use Java for this functionality as well.

Is that possible somehow? Or I am wrong and there is no way to configure the main menu using Java?

You're looking for the Telegram Bot API setMyCommands method:

Use this method to change the list of the bot's commands. See this manual for more details about bot commands.
_{Returns True on success.}

---

However, your question starts with "... customize the main menu texts based on the customer language preference ...";

The command list send to Telegram isn't user specific, it's the same for all people using your bot, so to 'change' them based on language might conflict with other users.

---

Assuming you're using rubenlagus/TelegramBots, there is a setMyCommands class with a test file that shows the following example:

SetMyCommands setMyCommands = SetMyCommands
    .builder()
    .command(BotCommand.builder().command("test").description("Test description").build())
    .languageCode("en")
    .scope(BotCommandScopeDefault.builder().build())
    .build();