/// <summary>
/// delete event when the time to check arrives. Delete all the elements that their expiration date isn't valid
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void DeletionEventHandler(object parameter)
{
Task.WaitAll(Task.Run(HoldForLock));
while (_listByTime.Start != null && DateTime.Now > _listByTime.Start._data._lastPurchaseDate.
AddDays(_configurationParameters.LifeTime))
{
_listByTime.RemoveFirst(out TimeData dataToDel); //delete from the link list (of times)
BoxCategory currentBox = new BoxCategory(new Y_Data(dataToDel.Height), dataToDel.Base);
_comunicate.ExpirationDateMessage(dataToDel.Base, dataToDel.Height); // exact position of the real yData
Delete(currentBox, false); //delete element
}
}
/// <summary>
/// when match is confirmed, display massages to the user acording to the quantity that left (alert if below the const alert
/// parameter or delete if the quantity reaches to 0)
/// </summary>
/// <param name="currentQuantity">quantity left</param>
/// <param name="x">base</param>
/// <param name="y">height</param>
/// <returns>systems operations acording to the quantity left</returns>
private void SuccessfulReduceOperation(BoxCategory boxCategory)
{
if (boxCategory.YData.Quantity == 0)
{
_comunicate.RunOutMassage(boxCategory.Base, boxCategory.YData.Height);
Delete(boxCategory, true);
}
else
{
if (boxCategory.YData.Quantity < _configurationParameters.AlertQuantity) //it's sure that it's not 0
{
_comunicate.Alert(boxCategory.Base, boxCategory.YData.Height, boxCategory.YData.Quantity);
}
UpdateDate(boxCategory.YData);
}
}
/// <summary>
/// Delete an item from the system
/// </summary>
/// <param name="boxCategory">the category to delete</param>
/// <param name="delByQuantity">An indicator that determine if the deletion was by expiration date or by 0 quantity</param>
private void Delete(BoxCategory boxCategory, bool delByQuantity)
{
X_Data xToDel = new X_Data(boxCategory.Base);
X_Data requestedBase;
_baseTree.Search(xToDel, out requestedBase); // must be true & initialize requestedBase
if (delByQuantity)
{
_listByTime.DeleteByNode(boxCategory.YData.timeRef); //remove the reference first
}
requestedBase.HTree.Remove(boxCategory.YData); // delete y (the remove is by value)
if (!requestedBase.HTree.IsrootExist())
{
_baseTree.Remove(requestedBase); //delete x element as well (empty yTree)
if (IsStoreEmpty())
{
_comunicate.EmptyStoreMessage(); // in a case of an empty xTree
}
}
}
