Use BotMan to link between multiple messenger services

link-between-messengers.php

<?php
use App\Channel;
use App\Http\Controllers\BotManController;
use BotMan\BotMan\Drivers\DriverManager;
use BotMan\Drivers\Slack\SlackDriver;
use BotMan\Drivers\Slack\SlackRTMDriver;
use BotMan\Drivers\Telegram\TelegramDriver;
use BotMan\Drivers\Web\WebDriver;

$botman = resolve('botman');

$botman->group(['driver' => TelegramDriver::class], function ($botman) {
	$botman->hears('(.*)', function ($bot, $input) {
		// Save username
		$user = $bot->getUser();
		$channelName = 'telegram-message-'.str_slug($user->getUsername());

		// Change to Slack Driver
		$bot->loadDriver(SlackDriver::class);

		// Create a new slack channel with the admin token
		$channel = $bot->sendRequest('channels.join', [
			'token' => env('SLACK_ADMIN_TOKEN'),
			'name' => $channelName
		]);
		// Retrieve the channel id
		$channelId = array_get(json_decode($channel->getContent(), true), 'channel.id');

		// Join the channel with the bot
		$channel = $bot->sendRequest('channels.invite', [
			'token' => env('SLACK_ADMIN_TOKEN'),
			'channel' => $channelId,
			'user' => env('SLACK_BOT_ID')
		]);

		// Save Telegram -> Slack user mapping in database
		$channel = Channel::firstOrCreate([
			'channel_id' => $channelId,
			'telegram_id' => $user->getId()
		]);

		if ($channel->wasRecentlyCreated) {
			// Notify slack channel (only once)
			$bot->say('New message from '.$user->getFirstName().' - join <#'.$channelId.'>', env('SLACK_CHANNEL_ID'), SlackDriver::class, [
				'as_user' => false,
				'username' => $user->getFirstName().' via Telegram'
			]);
		}

		// Originate the original message to the new channel.
		$bot->say($input, $channelId, SlackDriver::class, [
			'as_user' => false,
			'username' => $user->getFirstName().' via Telegram'
		]);
	});
});
$botman->group(['driver' => SlackRTMDriver::class], function ($botman) {
	$botman->hears('(.*)', function ($bot, $input) {

		// Send the reply back to telegram, if it's in a channel that belongs to a Telegram user.
		$channel = Channel::where('channel_id', $bot->getMessage()->getPayload()->get('channel'))->first();
		if ($channel) {
			$bot->say($input, $channel->telegram_id, TelegramDriver::class);
		}
		
	});
});