process pdf from doc

app/jobs/generate_preview_images_job.rb

@@ -1,17 +0,0 @@
-# frozen_string_literal: true
-
-class GeneratePreviewImagesJob
-  include Sidekiq::Job
-
-  sidekiq_options queue: :images
-
-  def perform(params = {})
-    attachment = ActiveStorage::Attachment.find(params['attachment_id'])
-
-    max_page = [attachment.metadata['pdf']['number_of_pages'].to_i - 1,
-                Templates::ProcessDocument::MAX_NUMBER_OF_PAGES_PROCESSED].min
-
-    Templates::ProcessDocument.generate_document_preview_images(attachment, attachment.download, 1..max_page,
-                                                                concurrency: 1)
-  end
-end

lib/templates/process_document.rb

@@ -41,16 +41,24 @@ module Templates
       attachment
     end
 
-    def process(attachment, data, extract_fields: false)
+    def process(attachment, data, extract_fields: false, doc: nil)
       if attachment.content_type == PDF_CONTENT_TYPE && extract_fields && data.size < MAX_FLATTEN_FILE_SIZE
+        if doc
+          fields = Templates::FindPdfiumAcroFields.call(attachment, doc, data)
+        else
           pdf = HexaPDF::Document.new(io: StringIO.new(data))
 
           fields = Templates::FindAcroFields.call(pdf, attachment, data)
         end
+      end
 
+      if doc
+        number_of_pages = doc.page_count
+      else
         pdf ||= HexaPDF::Document.new(io: StringIO.new(data))
 
         number_of_pages = pdf.pages.size
+      end
 
       attachment.metadata['pdf'] ||= {}
       attachment.metadata['pdf']['number_of_pages'] = number_of_pages