gistfile1.rb

def upload_sizing
  result = {:export => {use: []}}
  
  if uploads_enabled?
    dims = (upload_width? && upload_height?) ? { width: upload_width, height: upload_height } : nil
    dims_thumb = (upload_thumb_width? && upload_thumb_height?) ? { width: upload_thumb_width, height: upload_thumb_height } : nil
    
    if enable_images?
     if dims
        result[:resize] = dims
        result[:export][:use] << "resize"
      end
      if dims_thumb
        result[:resize_thumb] = dims_thumb
        result[:export][:use] << "resize_thumb"
      end
    end
    
    if enable_videos?
      if dims
         result[:encode] = dims
         result[:export][:use] << "encode"
       end
       if dims_thumb
         result[:encode_thumb] = dims_thumb
         result[:export][:use] << "encode_thumb"
       end
    end
  end
  
  result
end