Created worker to delete attachment bitstream

Signed-off-by: Israel Barreto Sant'Anna <ibsa14@inf.ufpr.br>

app/controllers/v1/learning_objects/attachment_controller.rb

@@ -6,7 +6,7 @@ class V1::LearningObjects::AttachmentController < ApplicationController
   def destroy
     return render status: :not_found if @learning_object.nil? || @attachment.nil?
 
-    destroy_attachment_in_dspace(@attachment.id_dspace)
+    DeleteBitstreamWorker.perform_async(@attachment.id)
     @attachment.destroy
 
     render status: :ok
@@ -28,9 +28,4 @@ class V1::LearningObjects::AttachmentController < ApplicationController
 
     authorize(@learning_object, :destroy?)
   end
-
-  def destroy_attachment_in_dspace(id)
-    client = DspaceService.create_client
-    client.bitstreams.delete(id: id)
-  end
 end

app/workers/delete_bitstream_worker.rb

+require_dependency 'dspace'
+
+class DeleteBitstreamWorker
+  include Sidekiq::Worker
+
+  def perform(attachment_id = nil)
+    attachment = LearningObject::Attachment.find(attachment_id)
+    return false if attachment.blank? || !wait_bitstream(attachment)
+
+    DspaceService.create_client.bitstreams.delete(id: attachment.id_dspace)
+  end
+
+  private
+
+  def wait_bitstream(attachment)
+    if attachment.id_dspace.blank?
+      Timeout.timeout(60) do
+        sleep(1.0) while attachment.id_dspace.blank?
+      end
+    end
+    true
+  rescue Timeout::Error
+    false
+  end
+end