module Noawsalbumart

# File lib/noawsalbumart.rb, line 7
def self.search(artist_name, album_name)
        return "Album Art Not Found" if INVALID.include?(artist_name) || INVALID.include?(album_name)
        query = query_string(artist_name, album_name)
        retries = 3
        begin
                doc = Nokogiri::HTML(open("http://www.amazon.com/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-keywords=#{query}&rh=i%3Aaps%2Ck%3A#{query}").read, nil, 'utf-8')
        rescue OpenURI::HTTPError => error
          response = error.io
          puts response.status
          puts "Retrying #{retries} more times"
          retries -= 1
          sleep 120
          retry
        end 
        doc.css("#result_0 img").attr("src").value
end

# File lib/noawsalbumart.rb, line 24
def self.query_string(artist_name, album_name)
              artist_query = artist_name.split.join("+")
              album_query = album_name.split.join("+")
              artist_query + "+" + album_query
end