Lightweight Passive Telegram Bot API (Ruby)

tg_api.rb

require 'json'
require 'net/http'

module TgAPI
  BOT_TOKEN = "[...]"
  def self.api_do action, **params
    uri = URI.parse "https://api.telegram.org/bot#{BOT_TOKEN}/#{action.to_s}"
    response = Net::HTTP.post uri, params.to_json, "Content-Type" => "application/json"
    unless response.is_a? Net::HTTPSuccess
      m = JSON.parse(response.body)&.[]("description") rescue nil
      m ||= response.code
      raise ArgumentError, "API request failed: #{m}"
    end
    JSON.parse(response.body)
  end

  def self.send_message chat_id, text, **params
    params[:chat_id] = chat_id
    params[:text] = text
    api_do :sendMessage, **params
  end
end