Learn-WinUI-3-Second-Edition/Chapter05/Start/MyMediaCollection/Interfaces/IDataService.cs

using MyMediaCollection.Enums;
using MyMediaCollection.Model;
using System.Collections.Generic;

namespace MyMediaCollection.Interfaces
{
    public interface IDataService
    {
        IList<MediaItem> GetItems();
        MediaItem GetItem(int id);
        int AddItem(MediaItem item);
        void UpdateItem(MediaItem item);
        IList<ItemType> GetItemTypes();
        Medium GetMedium(string name);
        IList<Medium> GetMediums();
        IList<Medium> GetMediums(ItemType itemType);
        IList<LocationType> GetLocationTypes();
    }
}