vt-social/lib/paperclip/lazy_thumbnail.rb

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# frozen_string_literal: true
module Paperclip
class LazyThumbnail < Paperclip::Thumbnail
def make
return File.open(@file.path) unless needs_convert?
min_side = [@current_geometry.width, @current_geometry.height].min
options[:geometry] = "#{min_side.to_i}x#{min_side.to_i}#" if @target_geometry.square? && min_side < @target_geometry.width
Paperclip::Thumbnail.make(file, options, attachment)
end
private
def needs_convert?
needs_different_geometry? || needs_different_format?
end
def needs_different_geometry?
!@target_geometry.nil? && @current_geometry.width != @target_geometry.width && @current_geometry.height != @target_geometry.height
end
def needs_different_format?
@format.present? && @current_format != @format
end
end
end