MediaPortal.Plugins.MovingPictures.DataProviders.DataProviderManager.ChangePriority C# (CSharp) Method

        public void ChangePriority(DBSourceInfo source, DataType type, bool raise)
        {
            if (source.IsDisabled(type)) {
                if (raise)
                    SetDisabled(source, type, false);
                else return;
            }

            // grab the correct list
            List<DBSourceInfo> sourceList = getEditableList(type);

            // make sure the specified source is in our list
            if (!sourceList.Contains(source))
                return;

            if (source.GetPriority(type) == null) {
                logger.Error("No priority set for " + type.ToString());
                return;
            }

            // make sure our index is in sync
            int index = sourceList.IndexOf(source);
            int oldPriority = (int) source.GetPriority(type);
            if (index != oldPriority)
                logger.Warn("Priority and List.IndexOf out of sync...");

            // raise priority
            if (raise) {
                if (source.GetPriority(type) > 0) {
                    source.SetPriority(type, oldPriority - 1);
                    sourceList[index - 1].SetPriority(type, oldPriority);

                    source.Commit();
                    sourceList[index - 1].Commit();
                }
            }

            // lower priority
            else {
                if (source.GetPriority(type) < sourceList.Count - 1 &&
                    sourceList[index + 1].GetPriority(type) != -1) {

                    source.SetPriority(type, oldPriority + 1);
                    sourceList[index + 1].SetPriority(type, oldPriority);

                    source.Commit();
                    sourceList[index + 1].Commit();
                }
            }

            // resort the list
            lock (sourceList) sourceList.Sort(sorters[type]);
        }