private void AddItemToMap(Model.ModelBase item)
{
if (item == null || string.IsNullOrWhiteSpace(item.Id))
{
return;
}
AddItemToMap(item.Parent);
List <string> parentList;
if (_ItemMap.ContainsKey(item.Id))
{
parentList = _ItemMap[item.Id];
}
else
{
parentList = new List <string>();
_ItemMap.Add(item.Id, parentList);
}
if (!parentList.Contains(item.ParentId))
{
parentList.Add(item.ParentId);
}
}
private Model.ModelBase GetItemFromID(string id)
{
if (string.Equals(id, "0", StringComparison.OrdinalIgnoreCase))
{
return(new Model.Root(CurrentUser));
}
if (_ItemMap.ContainsKey(id))
{
IEnumerable <string> parentList;
//the order by length is a trick to make sure we avoid using the All Videos All Music folder if possible
parentList = _ItemMap[id].OrderByDescending(i => i.Length);
Model.ModelBase result = null;
foreach (var parentID in parentList)
{
var parentItem = GetItemFromID(parentID);
if (parentItem != null)
{
result = parentItem.Children.FirstOrDefault(i => string.Equals(i.Id, id, StringComparison.OrdinalIgnoreCase));
if (result != null)
{
break;
}
}
}
//this shouldn't happen, if the item is in the map, it should exist
if (result == null)
{
Logger.Debug("GetItemFromID couldn't find parent for item: {0}", id);
}
return(result);
}
else
{
//find it the slow way by recursing through the object model
var result = new Model.Root(CurrentUser).GetChildRecursive(id);
//add it to the map so next time we don't have to find it this way
AddItemToMap(result);
return(result);
}
}
