simple multipage menu

.gitignore

@@ -0,0 +1 @@
+.idea

README.md

@@ -1,2 +1,131 @@
 # Telegram Inline Multipage Menu
+
 Multipage inline menu for Telegram Bots API
+
+_powered with [rubenlagus/TelegramBots API](https://github.com/rubenlagus/TelegramBots)_
+
+
+Create our own dynamical menu like this:
+
+![](https://bvn13.tk/files/81) ![](https://bvn13.tk/files/82) ![](https://bvn13.tk/files/83) ![](https://bvn13.tk/files/84)
+
+
+## Create your menu
+
+```java
+public class MenuBot extends TelegramLongPollingBot {
+
+    private MenuManager menuManager = new MenuManager();
+    
+    //...
+}
+```
+
+
+## Init the menu
+
+```java
+
+    //...
+
+    public void init() {
+        menuManager.setColumnsCount(2);
+
+        menuManager.addMenuItem("Action 1", "action 1");
+        menuManager.addMenuItem("Action 2", "action 2");
+        menuManager.addMenuItem("Action 3", "action 3");
+        menuManager.addMenuItem("Action 4", "action 4");
+        menuManager.addMenuItem("Action 5", "action 5");
+        menuManager.addMenuItem("Action 6", "action 6");
+        menuManager.addMenuItem("Action 7", "action 7");
+        menuManager.addMenuItem("Action 8", "action 8");
+        menuManager.addMenuItem("Action 9", "action 9");
+        menuManager.addMenuItem("Action 10", "action 10");
+        menuManager.addMenuItem("Action 11", "action 11");
+        menuManager.addMenuItem("Action 12", "action 12");
+        menuManager.addMenuItem("Action 13", "action 13");
+        menuManager.addMenuItem("Action 14", "action 14");
+        menuManager.addMenuItem("Action 15", "action 15");
+        menuManager.addMenuItem("Action 16", "action 16");
+        menuManager.addMenuItem("Action 17", "action 17");
+        menuManager.addMenuItem("Action 18", "action 18");
+        menuManager.addMenuItem("Action 19", "action 19");
+        menuManager.addMenuItem("Action 20", "action 20");
+
+        menuManager.init();
+    }    
+    
+    //...
+
+```
+
+
+## Render the menu
+
+```java
+public void onUpdateReceived(Update update) {
+
+    // We check if the update has a message and the message has text
+    if (update.hasMessage() && update.getMessage().hasText()) {
+
+        if (update.getMessage().getText().equals("/menu")) {
+            long chatId = update.getMessage().getChatId();
+            
+            // lets render the menu
+            InlineKeyboardBuilder builder = menuManager.createMenuForPage(0, true);
+
+            builder.setChatId(chatId).setText("Choose action:");
+            SendMessage message = builder.build();
+            
+            try {
+                // Send the message
+                execute(message);
+            } catch (TelegramApiException e) {
+                e.printStackTrace();
+            }
+            
+        } else {
+
+        }
+
+    }
+}
+```
+
+
+## Don't forget for acting on page switching
+
+```java
+public void onUpdateReceived(Update update) {
+    if (update.hasCallbackQuery()) {
+        // Set variables
+        long chatId = update.getCallbackQuery().getMessage().getChatId();
+        String callData = update.getCallbackQuery().getData();
+        long messageId = update.getCallbackQuery().getMessage().getMessageId();
+    
+        // here will be menu buttons callbacks
+        
+        if (callData.equals(MenuManager.CANCEL_ACTION)) {
+            replaceMessageWithText(chatId, messageId, "Cancelled.");
+    
+        
+        } else if (callData.startsWith(MenuManager.PREV_ACTION) || callData.startsWith(MenuManager.NEXT_ACTION)) {
+        
+            String pageNum = "0";
+            if (callData.startsWith(MenuManager.PREV_ACTION)) {
+                pageNum = callData.replace(MenuManager.PREV_ACTION+":", "");
+            } else {
+                pageNum = callData.replace(MenuManager.NEXT_ACTION+":", "");
+            }
+    
+            InlineKeyboardBuilder builder = menuManager.createMenuForPage(Integer.parseInt(pageNum), true);
+    
+            builder.setChatId(chatId).setText("Choose action:");
+            SendMessage message = builder.build();
+    
+            replaceMessage(chatId, messageId, message);
+    
+        }
+    }
+}
+```

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>ru.bvn13.examples.bot</groupId>
+    <artifactId>menubot</artifactId>
+    <version>1.1.0</version>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    <packaging>jar</packaging>
+
+    <name>Menu Bot</name>
+    <description>Telegram Inline Multipage Menu</description>
+
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+
+
+    <dependencies>
+
+        <!--TelegramAPI-->
+        <dependency>
+            <groupId>org.telegram</groupId>
+            <artifactId>telegrambots</artifactId>
+            <version>3.5</version>
+        </dependency>
+
+
+    </dependencies>
+
+
+</project>

src/main/java/ru/bvn13/examples/bot/Application.java

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+package ru.bvn13.examples.bot;
+
+import org.telegram.telegrambots.ApiContextInitializer;
+import org.telegram.telegrambots.TelegramBotsApi;
+import org.telegram.telegrambots.exceptions.TelegramApiException;
+
+/**
+ * Created by bvn13 on 21.02.2018.
+ */
+public class Application {
+    public static void main(String[] args) {
+        // Initialize Api Context
+        ApiContextInitializer.init();
+
+        // Instantiate Telegram Bots API
+        TelegramBotsApi botsApi = new TelegramBotsApi();
+
+        // Register our bot
+        MenuBot bot = new MenuBot();
+        bot.init();
+        try {
+            botsApi.registerBot(bot);
+        } catch (TelegramApiException e) {
+            e.printStackTrace();
+        }
+    }
+}

src/main/java/ru/bvn13/examples/bot/MenuBot.java

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+package ru.bvn13.examples.bot;
+
+import org.telegram.telegrambots.api.methods.send.SendMessage;
+import org.telegram.telegrambots.api.methods.updatingmessages.EditMessageText;
+import org.telegram.telegrambots.api.objects.Update;
+import org.telegram.telegrambots.api.objects.replykeyboard.InlineKeyboardMarkup;
+import org.telegram.telegrambots.bots.TelegramLongPollingBot;
+import org.telegram.telegrambots.exceptions.TelegramApiException;
+import ru.bvn13.examples.bot.accessories.InlineKeyboardBuilder;
+import ru.bvn13.examples.bot.menu.MenuManager;
+
+/**
+ * Created by bvn13 on 21.02.2018.
+ */
+public class MenuBot extends TelegramLongPollingBot {
+
+    private MenuManager menuManager = new MenuManager();
+
+    public void init() {
+        menuManager.setColumnsCount(2);
+
+        menuManager.addMenuItem("Action 1", "action 1");
+        menuManager.addMenuItem("Action 2", "action 2");
+        menuManager.addMenuItem("Action 3", "action 3");
+        menuManager.addMenuItem("Action 4", "action 4");
+        menuManager.addMenuItem("Action 5", "action 5");
+        menuManager.addMenuItem("Action 6", "action 6");
+        menuManager.addMenuItem("Action 7", "action 7");
+        menuManager.addMenuItem("Action 8", "action 8");
+        menuManager.addMenuItem("Action 9", "action 9");
+        menuManager.addMenuItem("Action 10", "action 10");
+        menuManager.addMenuItem("Action 11", "action 11");
+        menuManager.addMenuItem("Action 12", "action 12");
+        menuManager.addMenuItem("Action 13", "action 13");
+        menuManager.addMenuItem("Action 14", "action 14");
+        menuManager.addMenuItem("Action 15", "action 15");
+        menuManager.addMenuItem("Action 16", "action 16");
+        menuManager.addMenuItem("Action 17", "action 17");
+        menuManager.addMenuItem("Action 18", "action 18");
+        menuManager.addMenuItem("Action 19", "action 19");
+        menuManager.addMenuItem("Action 20", "action 20");
+
+        menuManager.init();
+    }
+
+
+    private void replaceMessageWithText(long chatId, long messageId, String text) {
+        EditMessageText newMessage = new EditMessageText()
+                .setChatId(chatId)
+                .setMessageId(Math.toIntExact(messageId))
+                .setText(text);
+        try {
+            execute(newMessage);
+        } catch (TelegramApiException e) {
+            e.printStackTrace();
+        }
+    }
+
+
+    private void replaceMessage(long chatId, long messageId, SendMessage message) {
+        EditMessageText newMessage = new EditMessageText()
+                .setChatId(chatId)
+                .setMessageId(Math.toIntExact(messageId))
+                .setText(message.getText())
+                .setReplyMarkup((InlineKeyboardMarkup) message.getReplyMarkup());
+        try {
+            execute(newMessage);
+        } catch (TelegramApiException e) {
+            e.printStackTrace();
+        }
+    }
+
+
+    @Override
+    public void onUpdateReceived(Update update) {
+
+
+        // We check if the update has a message and the message has text
+        if (update.hasMessage() && update.getMessage().hasText()) {
+
+            if (update.getMessage().getText().equals("/menu")) {
+                long chatId = update.getMessage().getChatId();
+
+                // lets render the menu
+                InlineKeyboardBuilder builder = menuManager.createMenuForPage(0, true);
+
+                builder.setChatId(chatId).setText("Choose action:");
+                SendMessage message = builder.build();
+
+                try {
+                    // Send the message
+                    execute(message);
+                } catch (TelegramApiException e) {
+                    e.printStackTrace();
+                }
+
+            } else {
+
+            }
+
+        } else if (update.hasCallbackQuery()) {
+
+            // Set variables
+            long chatId = update.getCallbackQuery().getMessage().getChatId();
+            String callData = update.getCallbackQuery().getData();
+            long messageId = update.getCallbackQuery().getMessage().getMessageId();
+
+            // here will be menu buttons callbacks
+
+            if (callData.equals(MenuManager.CANCEL_ACTION)) {
+                replaceMessageWithText(chatId, messageId, "Cancelled.");
+
+
+            } else if (callData.startsWith(MenuManager.PREV_ACTION) || callData.startsWith(MenuManager.NEXT_ACTION)) {
+
+                String pageNum = "0";
+                if (callData.startsWith(MenuManager.PREV_ACTION)) {
+                    pageNum = callData.replace(MenuManager.PREV_ACTION+":", "");
+                } else {
+                    pageNum = callData.replace(MenuManager.NEXT_ACTION+":", "");
+                }
+
+                InlineKeyboardBuilder builder = menuManager.createMenuForPage(Integer.parseInt(pageNum), true);
+
+                builder.setChatId(chatId).setText("Choose action:");
+                SendMessage message = builder.build();
+
+                replaceMessage(chatId, messageId, message);
+
+            }
+
+        }
+    }
+
+    @Override
+    public String getBotUsername() {
+        // Return bot username
+        // If bot username is @MyAmazingBot, it must return 'MyAmazingBot'
+        return "MenuBot";
+    }
+
+    @Override
+    public String getBotToken() {
+        // Return bot token from BotFather
+        return "12345:qwertyuiopASDGFHKMK";
+    }
+
+}
+

src/main/java/ru/bvn13/examples/bot/accessories/InlineKeyboardBuilder.java

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+package ru.bvn13.examples.bot.accessories;
+
+import org.telegram.telegrambots.api.methods.send.SendMessage;
+import org.telegram.telegrambots.api.objects.replykeyboard.InlineKeyboardMarkup;
+import org.telegram.telegrambots.api.objects.replykeyboard.buttons.InlineKeyboardButton;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by bvn13 on 21.02.2018.
+ */
+public class InlineKeyboardBuilder {
+
+    private Long chatId;
+    private String text;
+
+    private List<List<InlineKeyboardButton>> keyboard = new ArrayList<>();
+    private List<InlineKeyboardButton> row = null;
+
+    private InlineKeyboardBuilder() {}
+
+    public static InlineKeyboardBuilder create() {
+        InlineKeyboardBuilder builder = new InlineKeyboardBuilder();
+        return builder;
+    }
+
+    public static InlineKeyboardBuilder create(Long chatId) {
+        InlineKeyboardBuilder builder = new InlineKeyboardBuilder();
+        builder.setChatId(chatId);
+        return builder;
+    }
+
+    public InlineKeyboardBuilder setText(String text) {
+        this.text = text;
+        return this;
+    }
+
+    public InlineKeyboardBuilder setChatId(Long chatId) {
+        this.chatId = chatId;
+        return this;
+    }
+
+    public InlineKeyboardBuilder row() {
+        this.row = new ArrayList<>();
+        return this;
+    }
+
+    public InlineKeyboardBuilder button(String text, String callbackData) {
+        row.add(new InlineKeyboardButton().setText(text).setCallbackData(callbackData));
+        return this;
+    }
+
+    public InlineKeyboardBuilder endRow() {
+        this.keyboard.add(this.row);
+        this.row = null;
+        return this;
+    }
+
+
+    public SendMessage build() {
+        SendMessage message = new SendMessage();
+
+        message.setChatId(chatId);
+        message.setText(text);
+
+        InlineKeyboardMarkup keyboardMarkup = new InlineKeyboardMarkup();
+
+        keyboardMarkup.setKeyboard(keyboard);
+        message.setReplyMarkup(keyboardMarkup);
+
+        return message;
+    }
+
+}

src/main/java/ru/bvn13/examples/bot/menu/MenuItem.java

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+package ru.bvn13.examples.bot.menu;
+
+/**
+ * Created by bvn13 on 21.02.2018.
+ */
+public class MenuItem {
+
+    private String name;
+    private String action;
+
+
+    public MenuItem(String name, String action) {
+        this.name = name;
+        this.action = action;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getAction() {
+        return action;
+    }
+
+    public void setAction(String action) {
+        this.action = action;
+    }
+}

src/main/java/ru/bvn13/examples/bot/menu/MenuManager.java

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+package ru.bvn13.examples.bot.menu;
+
+import ru.bvn13.examples.bot.accessories.InlineKeyboardBuilder;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by bvn13 on 21.02.2018.
+ */
+public class MenuManager {
+
+    public static final String PREV_ACTION = "page-prev";
+    public static final String NEXT_ACTION = "page-next";
+    public static final String CANCEL_ACTION = "cancel";
+
+    private int buttonsPerPage = 6;
+    public void setButtonsPerPage(int buttonsPerPage) {
+        this.buttonsPerPage = buttonsPerPage;
+    }
+
+    private int total;
+    private int lastPage;
+
+    private MenuItem btnPrev = new MenuItem("<<", PREV_ACTION);
+    private MenuItem btnNext = new MenuItem(">>", NEXT_ACTION);
+    private MenuItem btnCancel = new MenuItem("Cancel", CANCEL_ACTION);
+
+    private List<MenuItem> menu = new ArrayList<>();
+
+    private int columnsCount;
+    public void setColumnsCount(int columnsCount) {
+        this.columnsCount = columnsCount;
+    }
+
+    public void init() {
+        this.total = menu.size();
+        this.lastPage = (int) Math.ceil((double) total / buttonsPerPage) - 1;
+    }
+
+    public void addMenuItem(String name, String action) {
+        this.menu.add(new MenuItem(name, action));
+    }
+
+    private List<MenuItem> getPage(int page) {
+        List<MenuItem> pageMenu = new ArrayList<>();
+
+        if (page > lastPage) {
+            return pageMenu;
+        }
+
+        int start = page* buttonsPerPage;
+        int end = (page+1)* buttonsPerPage -1;
+
+        if (start < 0) start = 0;
+        if (end >= total) end = total-1;
+
+        for (int i = start; i <= end; i++) {
+            pageMenu.add(menu.get(i));
+        }
+
+        return pageMenu;
+    }
+
+    private List<MenuItem> getControlButtonsForPage(int page, boolean hasCancel) {
+        List<MenuItem> buttons = new ArrayList<>();
+        if (page > 0) {
+            buttons.add(btnPrev);
+        }
+        if (hasCancel) {
+            buttons.add(btnCancel);
+        }
+        if (page < lastPage) {
+            buttons.add(btnNext);
+        }
+        return buttons;
+    }
+
+    public InlineKeyboardBuilder createMenuForPage(int page, boolean hasCancel) {
+        List<MenuItem> pageButtons = getPage(page);
+        List<MenuItem> controlButtons = getControlButtonsForPage(page, hasCancel);
+
+        InlineKeyboardBuilder builder = InlineKeyboardBuilder.create();
+        int col = 0;
+        int num = 0;
+        builder.row();
+        for (MenuItem button : pageButtons) {
+            builder.button(button.getName(), button.getAction());
+            if (++col >= columnsCount) {
+                col = 0;
+                builder.endRow();
+                if (num++ <= pageButtons.size()) {
+                    builder.row();
+                }
+            }
+        }
+        builder.endRow();
+
+        builder.row();
+        for (MenuItem button : controlButtons) {
+            if (button.getAction().equals(PREV_ACTION)) {
+                builder.button(button.getName(), button.getAction()+":"+(page-1));
+            } else if (button.getAction().equals(NEXT_ACTION)) {
+                builder.button(button.getName(), button.getAction()+":"+(page+1));
+            } else {
+                builder.button(button.getName(), button.getAction());
+            }
+        }
+        builder.endRow();
+
+        return builder;
+    }
+
+
+}