dart_telegram_bot

Description:

dart telegram bot

Dart Telegram Bot #
Dart Telegram Bot is a Dart wrapper for Telegram
bot API.
It is compatible with Native, Flutter and JS.


Using Dart Telegram Bot is straightforward, here's an example echo bot:
import 'package:dart_telegram_bot/dart_telegram_bot.dart';
import 'package:dart_telegram_bot/telegram_entities.dart';

void main() {
Bot(
// Insert your bot token here
token: 'BOT_TOKEN',
// Once the bot is ready this function will be called
// You can start the bot here
onReady: (bot) => bot.start(clean: true),
// Register a new callback for new updates
).onUpdate((bot, update) async {
// Send a message to the update chat with the received message
bot.sendMessage(ChatID(update.message!.chat.id), update.message!.text!);
});
}
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Bot start may fail when bot token is invalid or with network issues.
To handle such cases follow the next example:
void main() {
Bot(
token: 'BOT_TOKEN',
onReady: (bot) => bot.start(clean: true),
// Handle start failure
onStartFailed: (bot, e, s) => print('Start failed'),
);
}
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Also, you may want to disable or allow only certain update types.
To do so follow the next example:
void main() {
Bot(
token: 'BOT_TOKEN',
onReady: (bot) => bot.start(clean: true),
// Either allow all types but some
allowedUpdates: UpdateType.allBut([UpdateType.channelPost]),
// OR allow only a list of types
allowedUpdates: [UpdateType.message, UpdateType.editedMessage],
);
}
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Dart Telegram Bot also supports a more OOP approach.
The following example is still an echo bot, this time with OOP approach:
class MyBot extends Bot {

MyBot() : super(token: 'BOT_TOKEN') {
onUpdate(updateHandler);
}

@override
Future onReady(Bot bot) => bot.start(clean: true);

@override
Future onStartFailed(Bot bot, Object err, StackTrace st) async {
print('Bot failed to start: $err');
}

Future updateHandler(Bot bot, Update update) async {
bot.sendMessage(ChatID(update.message!.chat.id), update.message!.text!);
}
}
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Written by Kaikyu Lotus (Telegram)