private void UpdateShoppingList(Inventory inventory)
{
JourListDMContainer dm = new JourListDMContainer();
var inv = dm.Inventories.Single(z=>z.Id == inventory.Id);
bool needmore, needlist;
// deal with shopping list if necessary
needmore = inv.OnHand < inv.RestockThreshold;
needlist = inv.ShoppingList == null;
if (needmore)
{
if (needlist)
{
// Createlist
ShoppingList list = new ShoppingList();
do { list.Id = Guid.NewGuid(); }
while (dm.ShoppingLists.Count(z => z.Id == list.Id) > 0);
dm.AddToShoppingLists(list);
inv.ShoppingList = list;
}
var log = inv.InventoryLogs.Where(z => z.UnitId == inv.Unit.Id);
if (log.Count() > 0)
{
double sze = (from a in log group a by a.Size into s orderby s.Count() descending select s).First().First().Size;
inv.ShoppingList.SizeNeeded = sze;
inv.ShoppingList.QuantityNeeded = Math.Round((inv.RequiredQuantity - inv.OnHand) / sze, MidpointRounding.AwayFromZero);
}
else
{
inv.ShoppingList.SizeNeeded = (inv.RequiredQuantity - inv.OnHand);
inv.ShoppingList.QuantityNeeded = 1;
}
}
else if (!needlist)
// Remove the item from the shoppinglist
dm.ShoppingLists.DeleteObject(dm.Inventories.First(z => z.ShoppingList.Id == inv.ShoppingList.Id).ShoppingList);
dm.SaveChanges();
}