/// <summary>
/// Create all of the logic for this class
/// </summary>
private void Init()
{
// Get the selected item from the OrderViewModel
CurrentItem = OrderPageViewModel.VM.SelectedItem.Copy();
// Event for the current items ingredients list
CurrentItem.Ingredients.CollectionChanged += (sender, e) => UpdatePrices();
// Load the ingredients available for this item
switch (CurrentItem.Type)
{
// Load all of the pizza ingredients
case Enums.Pizza:
/* Copy over all of the ingredients to this class's list so
* that display prices can be changed without effecting the source
*/
Ingredients = new ObservableCollection <OrderItemViewModel>();
DatabaseHelpers.AllIngredients.ToList().Where(i => i.Type == Enums.PizzaIngredient).ToList().ForEach(i => { Ingredients.Add(i.Copy()); });
break;
// Should never go here
default: throw new Exception("Invalid object");
}
// Check once if the pizza is standard or if it has been changed before
UpdatePrices();
#region Create the commands
// Create the accept command
AcceptCommand = new RelayCommand((o) => {
// Return the new item and close this page
OrderPageViewModel.VM.SelectedItem = CurrentItem.Copy();
OrderPageViewModel.VM.SubPage = OrderSubPages.None;
});
// Create the AddIngredient command
AddIngredientCommand = new RelayCommand((o) => {
CurrentItem.Price += ((OrderItemViewModel)o).Price;
CurrentItem.Ingredients.Add(((OrderItemViewModel)o).Copy());
});
// Create the AddIngredient command
RemoveIngredientCommand = new RelayCommand((o) =>
{
/* If a free item is removed and the object contains 1 or more of the same
* ingredient that is an extra and not free, remove one of those first and
* keep the one that is free.
*/
if (((OrderItemViewModel)o).Price.Equals(0) && CurrentItem.Ingredients.ToList().Where(i => i.ProductID.Equals(((OrderItemViewModel)o).ProductID) && i.Price > 0).Count() > 0)
{
CurrentItem.Price -= CurrentItem.Ingredients.First(i => i.ProductID.Equals(((OrderItemViewModel)o).ProductID) && i.Price > 0).Price;
CurrentItem.Ingredients.Remove(CurrentItem.Ingredients.First(i => i.ProductID.Equals(((OrderItemViewModel)o).ProductID) && i.Price > 0));
}
/* Else if an extra ingredient is removed, just
* remove that one as normal
*/
else
{
CurrentItem.Price -= ((OrderItemViewModel)o).Price;
CurrentItem.Ingredients.Remove((OrderItemViewModel)o);
}
});
#endregion
}
