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# frozen_string_literal: true
require "image_processing"
module ActiveStorage
module Transformers
class ImageProcessingTransformer < Transformer
private
def process(file, format:)
processor.
source(file).
loader(page: 0).
convert(format).
apply(operations).
call
end
def processor
ImageProcessing.const_get(ActiveStorage.variant_processor.to_s.camelize)
end
def operations
transformations.each_with_object([]) do |(name, argument), list|
if name.to_s == "combine_options"
ActiveSupport::Deprecation.warn <<~WARNING
Active Storage's ImageProcessing transformer doesn't support :combine_options,
as it always generates a single ImageMagick command. Passing :combine_options will
not be supported in Rails 6.1.
WARNING
list.concat argument.keep_if { |key, value| value.present? }.to_a
elsif argument.present?
list << [ name, argument ]
end
end
end
end
end
end
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