Twitter -> IRC

url_twitter.rb

require "open-uri"
require "json"
require "htmlentities"

module URLTitle
  class Twitter
    class << self

      def fetch_tweet(id, token)
        url = "https://api.twitter.com/2/tweets/#{id}?" +
              "tweet.fields=created_at&expansions=author_id"
        data = URI.open(url, "Authorization" => "Bearer #{token}").read
        JSON.parse(data)
      end

      def get_author_name(data, author_id)
        ud = data["users"].find {|u| u["id"] == author_id }
        return [ud["name"], ud["username"]]
      end


      def parse(url, m)
        u = URI.parse(url)

        # figure out the redirection of t.co shortlinks
        if u.host == "t.co"
          begin
            u.open(redirect: false)
          rescue OpenURI::HTTPRedirect => redirect
            u = redirect.uri
            puts "Handled t.co redirect to #{u}"
          end
        end

        return unless u.host =~ /^(www\.)?twitter\.com$/i

        return unless u.path =~ %r{/status/(\d+)}

        id = $1
        json = fetch_tweet(id, m.bot.config["twitter_bearer_token"])

        # extract tweet data
        td = json["data"]
        return unless td

        tweet = HTMLEntities.new.decode(td["text"])
        time = Time.parse(td["created_at"])
        date = time.strftime("%d.%m.%Y")

        name, username = get_author_name(json["includes"], td["author_id"])

        if m.bot.config["twitter_color"]
          c_logo  = "\x0312"  # blue
          c_user  = "\x02"    # bold
          c_meta  = "\x037"   # orange
          c_hash  = "\x0311"  # cyan
          c_lf    = "\x037"   # orange

          # Colorize hashtags.
          # hashtag = letters, numbers, underscores allowed.
          # Must be the beginning of the line or a word.
          tweet.gsub!(/(?<=\s|^)\#[\w\d_]+/, "#{c_hash}\\&\x0f")

        else
          c_logo  = "\x02"    # bold
          c_user  = "\x02"    # bold
          c_meta  = ""
          c_hash  = "\x02"    # bold
          c_lf    = "\x02"
        end

        # fix newlines
        tweet.gsub!(/\s*\n+\s*/, "#{c_lf} ·\x0f ")

        return "#{c_logo}[Twitter]\x0f #{c_user}#{name}\x0f #{c_meta}<@#{username}> [#{date}]\x0f: #{tweet}"
      end

    end
  end
end