Finds a valid email giving a Fullname and a URL. Example: e = EmailFinder.new("Moises Narvaez", "www.koombea.com"); e.valid_email

email_finder.rb

class EmailFinder
  # TODO: para TopSpeed: Buscar si hay una "@" en el author, si es así... 
  # Buscar si en el texto de author hay algún texto extre paréntesis "()" 
  # si ese texto es un email, quitarlo (con los parentesis), sino cogerlo como nombre
  def initialize(full_name, url)
    @full_name = I18n.transliterate(full_name.downcase)
    @url = url
    @words = @full_name.split(' ')
  end

  def options
    @options ||= begin
      names.map do |name|
        [
          "#{name[0]}.#{name[1]}@#{domain}",
          "#{name[0]}#{name[1]}@#{domain}",
          "#{name[0]}_#{name[1]}@#{domain}",
          "#{name[0][0]}#{name[1]}@#{domain}",
          "#{name[0]}@#{domain}",
          "#{name[1]}@#{domain}"
        ]
      end.flatten
    end
  end

  def valid_email
    @valid_email ||= begin
      final_email = nil  
      options.each do |email|
        begin
          final_email = email and break if EmailVerifier.check(email)
          sleep 1
        rescue
          final_email = nil 
        end
      end
      final_email
    end
  end

  private

  def names
    @names ||= begin
      @words = @words.first(4) if @words.length > 4
      @words = [@words[0], @words[2]] if @words.length == 4
      @words = [@words[0], ''] if @words.length == 1
      return [@words] if @words.length == 2
      [ [@words[0], @words[1]], [@words[0], @words[2]] ]
    end
  end

  def domain
    @domain ||= begin
      @url = "http://#{@url}" unless @url.start_with?('http')
      uri = URI.parse(@url)
      host = uri.host.downcase
      host.start_with?('www.') ? host[4..-1] : host
    end
  end
end