telegram-bot-sample

telegram bot example

Env

Set environment values to start hacking

BOT_TOKEN =   <bot token from telegram bot-father>
BOT_NAME  =   <your bot name>

Run

mvn clean install
java -jar target/saya-1.0-SNAPSHOT.jar

or just run it from IntellijIDEA

Add command

import com.apploidxxx.handler.Log;
import com.apploidxxx.handler.RequestLogger;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.telegram.telegrambots.meta.api.objects.Message;

@Handler("/hello")
public class HelloHandler implements RequestHandler {

    private static final Logger log = LoggerFactory.getLogger(HelloHandler.class);

    @Override
    public SendMessage execute(Message message) {
        log.info("Executing message from : " + message.getText());
        return SendMessage.builder()
                .text("Yaks")
                .chatId(String.valueOf(message.getChatId()))
                .build();
    }
}

This command will be executed after user types /hello

Also, see how to work with telegram bot SDK here

Add loggers

If you want logs every or specific message - you can define logger. Also, you can set execution policy.

import com.apploidxxx.handler.Log;
import com.apploidxxx.handler.RequestLogger;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.telegram.telegrambots.meta.api.objects.Message;

@Log  // will be executed in every message
public class LogHandler implements RequestLogger {

    private static final Logger log = LoggerFactory.getLogger(LogHandler.class);
    
    @Override
    public void execute(Message message) {
        log.info("[LOG] Just log a received message : " + message.getText());
    }
}

@Log(value = "/hello")  // will be executed only on "/hello" message. You can specify this value with another string or regex
public class HelloLogHandler implements RequestLogger {
    public static final Logger log = LoggerFactory.getLogger(HelloLogHandler.class);

    @Override
    public void execute(Message message) {
        log.info("[LOG] Received special hello command!");
    }
}

Execution policy set:

@Log(executionTime = ExecutionTime.AFTER)
public class AfterLogHandler implements RequestLogger {

    private static final Logger log = LoggerFactory.getLogger(AfterLogHandler.class);

    @Override
    public void executeAfter(Message message, SendMessage sendMessage) {
        log.info("[LOG] Bot response >> " + sendMessage.getText());
    }
}

Here you need to implement executeAfter from RequestLogger. See DefaultBot sources to see implementation.

There is execution timeline:

----> [Logger (BEFORE)] ----> [Execute command and response to user] ----> [Logger (AFTER)]

Also, you can use array of ExecutionTime:

@Log(executionTime = {ExecutionTime.AFTER, ExecutionTime.BEFORE})
public class AfterAndBeforeLogger implements RequestLogger {
    private static final Logger log = LoggerFactory.getLogger(AfterAndBeforeLogger.class);

    @Override
    public void execute(Message message) {
        log.info("Before execute");
    }

    @Override
    public void executeAfter(Message message, SendMessage sendMessage) {
        log.info("After execute");
    }
}