module ImageMosaic
  module Data
    class Validator
      def initialize(urls)
        @urls = urls
      end

      def items
        @items ||= validate_items.compact
      end

      private

      def validate_items
        @urls.map do |url|
          image = Image::Child.new(url)
          next unless image.valid?
          {
            url: url,
            h: image.height,
            w: image.width
          }
        end
      end
    end
  end
end