gistfile1.rb

require 'mechanize'

base = 'https://graph.facebook.com/v2.3/'
route = 'me/feed?since=06.04.2015'
access_token = {'access_token' => ENV['ACCESS_TOKEN']}
variations = %w(happy bday birthday mulți multi ani trăiești traiesti)

agent = Mechanize.new

response = JSON.parse(agent.get(base + route, access_token).body)

response["data"].each do |res|
  msg = res["message"].split.map!{ |s| s.downcase!; s.gsub(/\p{^Alnum}/, ''); }

  if (msg & variations).count != 0
    id = res["id"]

    like_url = base + id + "/likes"
    comment_url = base + id + "/comments"

    file = agent.get(comment_url, access_token)
    thanks_not_given = JSON.parse(file.body)["data"].find { |hash| hash["message"] == "Thanks!" && hash["from"]["name"] == "Radu Croitoru" }.nil?

    agent.post(like_url, access_token)
    agent.post(comment_url, access_token.merge!("message" => "Thanks!")) if thanks_not_given
  end
end