Remove image quality preprocessor

app/models/asset.rb

@@ -23,8 +23,7 @@ class Asset < ApplicationRecord
                       else
                         {
                           large: [Constants::LARGE_PIC_FORMAT, :jpg],
-                          medium: [Constants::MEDIUM_PIC_FORMAT, :jpg],
+                          medium: [Constants::MEDIUM_PIC_FORMAT, :jpg]
-                          original: { processors: [:image_quality_calculate] }
                         }
                       end
                     },
@@ -34,6 +33,7 @@ class Asset < ApplicationRecord
                     }
 
   before_post_process :previewable?
+  before_save :extract_image_quality
 
   # adds image processing in background job
   process_in_background :file, processing_image_url: '/images/:style/processing.gif'
@@ -200,6 +200,18 @@ class Asset < ApplicationRecord
     end
   end
 
+  def extract_image_quality
+    return unless ['image/jpeg', 'image/pjpeg'].include? file_content_type
+
+    tempfile = file.queued_for_write[:original]
+    unless tempfile.nil?
+      quality = Paperclip::Processor.new(tempfile).identify(" -format '%Q' #{tempfile.path}")
+      self.file_image_quality = quality.to_i
+    end
+  rescue StandardError => e
+    Rails.logger.info "There was an error extracting image quality - #{e}"
+  end
+
   def previewable?
     file.previewable_image? || file.previewable_document?
   end

lib/paperclip/image_quality_calculate.rb

@@ -1,35 +0,0 @@
-# frozen_string_literal: true
-
-module Paperclip
-  class ImageQualityCalculate < Processor
-    def initialize(file, options = {}, attachment = nil)
-      super
-    end
-
-    def make
-      if @file && (['image/jpeg', 'image/pjpeg'].include? @file.content_type)
-        quality = Paperclip::Processor.new(@file).identify(" -format '%Q' #{@file.path}")
-        @attachment.instance.file_image_quality = quality.to_i
-        # Asset will be save after all processors finished
-      end
-
-      # We have to create a new temp file otherwise the postprocessing logic will
-      # delete the original file, leaving no files to postprocess for styles
-      current_format = File.extname(attachment.instance.file_file_name)
-      basename = File.basename(@file.path, current_format)
-      tempfile = Tempfile.new([basename, current_format].compact.join('.'))
-
-      begin
-        tempfile.write(File.read(@file.path))
-        tempfile.flush
-        tempfile
-      rescue StandardError => e
-        tempfile.close
-        tempfile.unlink
-        raise Paperclip::Error, "There was an error writing to tempfile - #{e}"
-      end
-    rescue StandardError => e
-      raise Paperclip::Error, "There was an error processing the image - #{e}"
-    end
-  end
-end