OO Design Exercise Solution

module.rb

class SocialExtractor
  require 'nokogiri'
  require 'open-uri'

  def self.get_social_profile url
    # If it's not a Twitter URL, throw exception
    if url.nil? || !url.include?('twitter.com')
      raise Exception, "Invalid URL."
    end

    # Make call to URL to grab content
    doc = Nokogiri.HTML(open(url))

    # Parse content
    profile_card = doc.css('.profile-card-inner').first

    fullname = profile_card.css('.fullname').first.text.strip
    username = profile_card.css('.username').first.text.strip
    bio = profile_card.css('.bio').first.text.strip

    location_and_url = profile_card.css('.location-and-url').first

    location = location_and_url.css('.location').text.strip
    url = location_and_url.css('.url a').first.attr('title').strip

    # Put content into response object
    SocialProfileResponse.new fullname, username, bio, location, url
  end
end

class SocialProfileResponse
  attr_reader :fullname, :username, :bio, :location, :url

  def initialize fullname, username, bio, location, url
    @fullname = fullname
    @username = username
    @bio = bio
    @location = location
    @url = url
  end
end