better erroring

main.rb

@@ -81,7 +81,7 @@ bot.message(private: true) do |event|
       event.respond("Submission denied; attached file but I can't figure out the file type")
     end
   end
-
+  error = false
   urls = URI.extract(event.content)
   urls.each do |url|
     mime_guess = MimeMagic.by_extension(url)
@@ -90,11 +90,16 @@ bot.message(private: true) do |event|
         download = Down.download(file.url)
         FileUtils.mv(download.path, "./spool/#{download.original_filename}")
         folder.submit(Submission.new("./spool/#{download.original_filename}",true,sender))
+      else
+        event.respond("Submission denied; link goes to a piece of media but I can't figure out what it is")
+        error = true
       end
     else
       folder.submit(Submission.new(url,false,sender))
     end
-    event.respond("Submission #{i} accepted")
+    if error
+      event.respond("Submission #{i} accepted")
+    end
     i= i+1
   end
   folder.update()