Change local media attachments to perform heavy processing asynchronously (#13210)

Fix #9106

app/workers/post_process_media_worker.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+class PostProcessMediaWorker
+  include Sidekiq::Worker
+
+  sidekiq_options retry: 1, dead: false
+
+  sidekiq_retries_exhausted do |msg|
+    media_attachment_id = msg['args'].first
+
+    ActiveRecord::Base.connection_pool.with_connection do
+      begin
+        media_attachment = MediaAttachment.find(media_attachment_id)
+        media_attachment.processing = :failed
+        media_attachment.save
+      rescue ActiveRecord::RecordNotFound
+        true
+      end
+    end
+
+    Sidekiq.logger.error("Processing media attachment #{media_attachment_id} failed with #{msg['error_message']}")
+  end
+
+  def perform(media_attachment_id)
+    media_attachment = MediaAttachment.find(media_attachment_id)
+    media_attachment.processing = :in_progress
+    media_attachment.save
+    media_attachment.file.reprocess_original!
+    media_attachment.processing = :complete
+    media_attachment.save
+  rescue ActiveRecord::RecordNotFound
+    true
+  end
+end