VRFS-3936 mobile purchase sync fixes

web/app/controllers/api_jam_tracks_controller.rb

@@ -102,7 +102,6 @@ class ApiJamTracksController < ApiController
       if params[:mixcheck]
         checksum = JamTrackMixdown.mixdownChecksum(current_user.id, jtid)
         head :ok, checksum: checksum
-        return
       else
         # 204: nothing purchased for user
         # 200: jamtrack purchase for user confirmed
@@ -111,21 +110,12 @@ class ApiJamTracksController < ApiController
             .limit(1)
             .blank?
           head(:no_content)
-          return
         end
       end
-    elsif params[:syncbuys]
-      syncbuys = params[:syncbuys].to_i
-      latestPurchase = JamTrack.latestPurchase(current_user.id)
-      if 0 == syncbuys || (0 < latestPurchase && (latestPurchase <= syncbuys))
-        head :no_content, latestpurchase: latestPurchase
-        return 
-      else
-        head :ok, latestpurchase: latestPurchase
-        return
-      end
+    elsif params[:syncbuys].present?
+      head :ok, purchasecount: JamTrackRight.where(user_id: current_user.id).count
     end
-    head(:ok)
+    head(:ok) unless performed?
   end
 
   def purchased