require 'w3c_validators'

class W3CValidator

  include W3CValidators

  def description ()
    "Evaluating CSS files against W3C CSS2 Validator"
  end

  def initialize(env)
    @env = env
  end

  def should_exclude (filename)
     @styles_excluded.each do |stylename|
       if filename.strip == stylename.strip
         @env.log("Excluding filename #{filename}", :info)
         return true
       end
     end
     return false
  end

  def execute ()
    @validator = CSSValidator.new
    @errors = false
    @styles_folder = File.expand_path (@env.dev_root + "site/web/styles")
    @styles_excluded = File.readlines @styles_folder + "/exclude.txt"
    Dir[@styles_folder + "/*.css"].each do |path|
      if should_exclude File.basename(path)
        next
      end
      results = @validator.validate_file path

      if results.errors.length > 0
        results.errors.each do |error|
          @env.log(error.message.strip + " (#{path})\n", :warn)
        end
        @errors = true
      end
    end
    raise "CSS failed validation" if @errors
  end
end