private void RemoveItem(MediaItemToken item)
{
if (item == null)
{
return;
}
if (--item.Count > 0)
{
_db.Update(item);
return;
}
_tokens.Remove(item);
_db.Delete(item);
StorageApplicationPermissions.FutureAccessList.Remove(item.Token);
}
/// <summary>
/// Request Token from system. If it returns null, there is no more space for saving this item.
/// </summary>
/// <param name="accessibleItem"></param>
/// <returns></returns>
public string RequestToken(IStorageItem accessibleItem)
{
if (accessibleItem == null)
{
return(null);
}
var item = _tokens.SingleOrDefault(i => i.Path.Equals(accessibleItem.Path, StringComparison.OrdinalIgnoreCase));
if (item != null)
{
item.Count++;
_db.Update(item);
return(item.Token);
}
if (_tokens.Count == 1000)
{
return(null);
}
var file = accessibleItem as IStorageFile; // For saving tokens, just optimizing for IStorageFile
if (file != null)
{
var fileFolder = Path.GetDirectoryName(file.Path);
var reusableToken = _tokens.FirstOrDefault(t => t.Path.Equals(fileFolder, StringComparison.OrdinalIgnoreCase));
if (reusableToken != null)
{
reusableToken.Count++;
_db.Update(reusableToken);
return(reusableToken.Token);
}
}
var token = StorageApplicationPermissions.FutureAccessList.Add(accessibleItem);
var newItem = new MediaItemToken {
Path = accessibleItem.Path, Token = token, Count = 1
};
_tokens.Add(newItem);
_db.Insert(newItem);
return(token);
}