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# frozen_string_literal: true
require 'mime/types/columnar'
module Paperclip
class ImageExtractor < Paperclip::Processor
def make
return @file unless options[:style] == :original
image = extract_image_from_file!
unless image.nil?
begin
attachment.instance.thumbnail = image if image.size.positive?
ensure
# Paperclip does not automatically delete the source file of
# a new attachment while working on copies of it, so we need
# to make sure it's cleaned up
begin
image.close(true)
rescue Errno::ENOENT
nil
end
end
end
@file
end
private
def extract_image_from_file!
::Av.logger = Paperclip.logger
cli = ::Av.cli
dst = Tempfile.new([File.basename(@file.path, '.*'), '.png'])
dst.binmode
cli.add_source(@file.path)
cli.add_destination(dst.path)
cli.add_output_param loglevel: 'fatal'
begin
cli.run
rescue Cocaine::ExitStatusError, ::Av::CommandError
dst.close(true)
return nil
end
dst
end
end
end
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