verify bitstreams in dspace for convert video worker

app/workers/convert_video_worker.rb

@@ -7,13 +7,14 @@ class ConvertVideoWorker
   def perform(id)
     begin
       object = learning_object_repository.find id
+      dspace_object = dspace_client.items.find(id: object.id_dspace, expand: 'bitstreams')
 
       # convert if object has a flv and not a mp4
       video = nil
-      object.attachments.each do |attachment|
-        video = attachment if attachment.name =~ /(.flv|.wmv|.mov|.mpg)$/i
+      dspace_object.bit_streams.each do |bitstream|
+        video = bitstream if bitstream.name =~ /(.flv|.wmv|.mov|.mpg)$/i
 
-        return true if attachment.name =~ /.mp4$/i
+        return true if bitstream.name =~ /.mp4$/i
       end
       return true if video.nil?
 
@@ -48,11 +49,8 @@ class ConvertVideoWorker
     ensure
       # remove temp files
       original_bitstream.unlink unless original_bitstream.nil?
-
-      unless converted.nil?
-        converted.close
-        FileUtils.rm converted_path, force: true
-      end
+      converted.close unless converted.nil?
+      FileUtils.rm converted_path, force: true
     end
   end