IdDictionary.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
 
namespace ReLogic.Reflection;
 
public class IdDictionary
{
    private readonly Dictionary<string, int> _nameToId = new Dictionary<string, int>();
 
    private Dictionary<int, string> _idToName;
 
    public readonly int Count;
 
    public IEnumerable<string> Names => _nameToId.Keys;
 
    private IdDictionary(int count)
    {
        Count = count;
    }
 
    public bool TryGetName(int id, out string name)
    {
        return _idToName.TryGetValue(id, out name);
    }
 
    public bool TryGetId(string name, out int id)
    {
        return _nameToId.TryGetValue(name, out id);
    }
 
    public bool ContainsName(string name)
    {
        return _nameToId.ContainsKey(name);
    }
 
    public bool ContainsId(int id)
    {
        return _idToName.ContainsKey(id);
    }
 
    public string GetName(int id)
    {
        return _idToName[id];
    }
 
    public int GetId(string name)
    {
        return _nameToId[name];
    }
 
    public void Add(string name, int id)
    {
        _idToName.Add(id, name);
        _nameToId.Add(name, id);
    }
 
    public void Remove(string name)
    {
        _idToName.Remove(_nameToId[name]);
        _nameToId.Remove(name);
    }
 
    public void Remove(int id)
    {
        _nameToId.Remove(_idToName[id]);
        _idToName.Remove(id);
    }
 
    public static IdDictionary Create(Type idClass, Type idType)
    {
        int num = int.MaxValue;
        FieldInfo fieldInfo = idClass.GetFields().FirstOrDefault((FieldInfo field) => field.Name == "Count");
        if (fieldInfo != null)
        {
            num = Convert.ToInt32(fieldInfo.GetValue(null));
            if (num == 0)
            {
                throw new Exception("IdDictionary cannot be created before Count field is initialized. Move to bottom of static class");
            }
        }
        IdDictionary dictionary = new IdDictionary(num);
        (from f in idClass.GetFields(BindingFlags.Static | BindingFlags.Public)
            where f.FieldType == idType
            where f.GetCustomAttribute<ObsoleteAttribute>() == null
            select f).ToList().ForEach(delegate(FieldInfo field)
        {
            int num2 = Convert.ToInt32(field.GetValue(null));
            if (num2 < dictionary.Count)
            {
                dictionary._nameToId.Add(field.Name, num2);
            }
        });
        dictionary._idToName = dictionary._nameToId.ToDictionary((KeyValuePair<string, int> kp) => kp.Value, (KeyValuePair<string, int> kp) => kp.Key);
        return dictionary;
    }
 
    public static IdDictionary Create<IdClass, IdType>()
    {
        return Create(typeof(IdClass), typeof(IdType));
    }
}