public ContainableItem GetItem(Position position)
{
int id = this.matrix.GetItemIdAtPosition(position);
ContainableItem item = this.products.FirstOrDefault(prod => prod.Id == id);
return(item);
}
public void AddItem(ContainableItem prod)
{
if (this.products.Any(p => p.Id == prod.Id))
{
throw new Exception($"Item already exists in list with id: {prod.Id}");
}
this.products.Add(prod);
}
public ContainableItem RemoveItem(int itemId)
{
ContainableItem itemToRemove = this.products.FirstOrDefault(p => p.Id == itemId);
if (itemToRemove != null)
{
this.products.Remove(itemToRemove);
}
return(itemToRemove);
}
public void Update(ContainableItem obj)
{
if (obj.Quantity == 0)
{
// Remove it from list
this.RemoveItem(obj.Id);
// Clear positions in matrix.
this.matrix.ClearPositionsInMatrix(obj.Id);
}
}
public void LoadFromFile(string databaseFilePath)
{
using (StreamReader file = File.OpenText(databaseFilePath))
{
JsonSerializer serializer = new JsonSerializer();
var productsInFile = (List <Product>)serializer.Deserialize(file, typeof(List <Product>));
foreach (Product product in productsInFile)
{
ContainableItem item = this.BuildContainableItem(product);
this.AddItem(item);
}
}
}
private ContainableItem BuildContainableItem(Product product)
{
ContainableItem item = new ContainableItem(product);
Position positionInMatrix = this.matrix.GetNextPosition(item.Size, item.Id);
if (positionInMatrix != null)
{
item.Position = positionInMatrix;
}
else
{
throw new Exception($"Cannot add product: {item.Name} in vending machine. No position found!");
}
return(item);
}