class CloudfrontLinkChecker

# File lib/cloudfront_link_checker.rb, line 2
def self.scan_files(directory_to_scan)
  Dir.chdir(directory_to_scan) do
    system('pwd')
    htmlfiles = File.join("**", "*.html")
    files = Dir.glob(htmlfiles)
    bad_files = {}
    files.each do |file|
      bad_links = []
      results = File.readlines(file, :encoding => "UTF-8").grep /href="(.*)"/i
      results.each do |line|
        links = line.match(/href=(["'])(.*?)\1/i)[2]
        exclude_start_with_list = ["https:", "http:", "#", "mailto:", "tel:"]
        exclude_endings = [".ico", ".png", ".css", "/#contact-us", ".pdf", ".html"]
        if !links.start_with?(*exclude_start_with_list) && !links.end_with?(*exclude_endings)
          if !links.start_with?("/") || !links.end_with?("/")
            bad_links.push(links)
          end
        end
      end
      # Add the bad files to a map keyed of filename
      if !bad_links.empty?
        bad_files[file] = bad_links
      end
    end

    if !bad_files.empty?
      raise "Bad links discovered. Links need to start and end with forward-slashs to be served by CloudFront: #{bad_files}"
    end
  end
end