telegram_sample.rb

require 'telegram_bot'

bot = TelegramBot.new(token: '193199186:AAFtN0tv35_AUxiWHvQvOQOLw-u-tsGtn6A')
bot.get_updates(fail_silently: true) do |message|
puts "@#{message.from.username}: #{message.text}"
command = message.get_command_for(bot)

message.reply do |reply|
  case command
  when /greet/i
    reply.text = "Hello, #{message.from.first_name}!"
  else
    reply.text = "#{message.from.first_name}, have no idea what #{command.inspect} means."
  end
  puts "sending #{reply.text.inspect} to @#{message.from.username}"
  reply.send_with(bot)
end