BookList.cs

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using System.Collections.Generic;
using System.IO;
using System.Linq;
 
public class BookList
{
    public class Item
    {
        public string title;
 
        public string author;
 
        public string id;
 
        public int chance = 100;
    }
 
    public static Dictionary<string, Dictionary<string, Item>> dict;
 
    public static void Init()
    {
        dict = new Dictionary<string, Dictionary<string, Item>>();
        AddDir("Book", CorePath.CorePackage.Book);
        AddDir("Scroll", CorePath.CorePackage.Scroll);
        static void AddDir(string id, string path)
        {
            DirectoryInfo directoryInfo = new DirectoryInfo(path);
            Dictionary<string, Item> dictionary = new Dictionary<string, Item>();
            dict.Add(id, dictionary);
            FileInfo[] files = directoryInfo.GetFiles();
            foreach (FileInfo fileInfo in files)
            {
                if (!(fileInfo.Extension != ".txt"))
                {
                    StreamReader streamReader = new StreamReader(fileInfo.FullName);
                    string[] array = streamReader.ReadLine().Split(',');
                    Item item = new Item
                    {
                        title = array[0],
                        author = ((array.Length >= 2 && !array[1].IsEmpty()) ? "nameAuthor".lang(array[1]) : "unknownAuthor".lang()),
                        chance = ((array.Length >= 3) ? array[2].ToInt() : 100),
                        id = fileInfo.Name.Replace(fileInfo.Extension, "")
                    };
                    dictionary.Add(item.id, item);
                    streamReader.Close();
                }
            }
        }
    }
 
    public static Item GetRandomItem(string idCat = "Book")
    {
        return dict[idCat].Where((KeyValuePair<string, Item> p) => p.Value.chance != 0).ToList().RandomItem()
            .Value;
    }
 
    public static Item GetItem(string id, string idCat = "Book")
    {
        return dict[idCat].TryGetValue(id) ?? dict["Book"]["_default"];
    }
}