/// <summary>
/// Updates the quantity for the given wine. Tracks the user who made the change as well.
/// </summary>
/// <param name="wineId">Wine to update.</param>
/// <param name="quantity">Quantity to change to.</param>
/// <param name="userId">User who made the change.</param>
public static void UpdateInventory(int wineId, int quantity, int userId)
{
if (!UserTable.ContainsUserId(userId))
{
throw new ArgumentException($"UpdateInventory({wineId}, {quantity}, {userId}*): UserId* does not exist, not performing quantity change");
}
int oldQuantity = GetQuantity(wineId);
int change = quantity - oldQuantity;
tableManager.InventoryChangeTableAdapter.Insert(userId, wineId, change, DateTime.UtcNow);
tableManager.InventoryTableAdapter.UpdateInventory(wineId, quantity);
}
