Buecherwurm/Inventory.cs

using System.Collections.Generic;

namespace Bücherwurm
{
    class Inventory
    {
        private List<Item> InventoryList {get; set;}

        private int NextId {get; set;}

        public Inventory(){
            InventoryList = new List<Item>();
            NextId = 1;
        }

        public void Add(IProduct Book)
        {
            InventoryList.Add(new Item(NextId, Book.ProductId));
            NextId = NextId + 1;
        }

        public void Add(int BookId)
        {
            InventoryList.Add(new Item(NextId, BookId));
            NextId = NextId + 1;
        }

        public void Remove(int Id)
        {
            InventoryList.RemoveAll(item => item.ItemId == Id);
        }

        public void BookRemove(int ProdId)
        {
            InventoryList.RemoveAll(item => item.ProdId == ProdId);
        }

        public List<Item> GetInventory()
        {
            return InventoryList;
        }

        public bool IsInInventory(int Id)
        {
            return (InventoryList.Find(item => item.ItemId == Id) != null);
        }

        public bool isAvailable(int Id)
        {
            return (InventoryList.Find(item => item.ItemId == Id && item.Status == StatusEnum.Available) != null);
        }

        public Item LookupItem(int ItemId)
        {
            return InventoryList.Find(item => ItemId == item.ItemId);
        }
    }
}