class ScriptCheck

def missing_src?
  !@script.src
end

def run
  @html.css('script').each do |node|
    @script = create_element(node)
    line = node.line
    next if @script.ignore?
    next unless node.text.strip.empty?
    # does the script exist?
    if missing_src?
      add_issue('script is empty and has no src attribute', line: line)
    elsif @script.remote?
      add_to_external_urls(@script.src, line)
    elsif !@script.exists?
      add_issue("internal script #{@script.src} does not exist", line: line)
    end
  end
  external_urls
end