ServerJoinRequestsManager.cs

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using System.Collections.Generic;
using System.Collections.ObjectModel;
 
namespace Terraria.Social.Base;
 
public class ServerJoinRequestsManager
{
    private readonly List<UserJoinToServerRequest> _requests;
 
    public readonly ReadOnlyCollection<UserJoinToServerRequest> CurrentRequests;
 
    public event ServerJoinRequestEvent OnRequestAdded;
 
    public event ServerJoinRequestEvent OnRequestRemoved;
 
    public ServerJoinRequestsManager()
    {
        _requests = new List<UserJoinToServerRequest>();
        CurrentRequests = new ReadOnlyCollection<UserJoinToServerRequest>(_requests);
    }
 
    public void Update()
    {
        for (int num = _requests.Count - 1; num >= 0; num--)
        {
            if (!_requests[num].IsValid())
            {
                RemoveRequestAtIndex(num);
            }
        }
    }
 
    public void Add(UserJoinToServerRequest request)
    {
        for (int num = _requests.Count - 1; num >= 0; num--)
        {
            if (_requests[num].Equals(request))
            {
                RemoveRequestAtIndex(num);
            }
        }
        _requests.Add(request);
        request.OnAccepted += delegate
        {
            RemoveRequest(request);
        };
        request.OnRejected += delegate
        {
            RemoveRequest(request);
        };
        if (this.OnRequestAdded != null)
        {
            this.OnRequestAdded(request);
        }
    }
 
    private void RemoveRequestAtIndex(int i)
    {
        UserJoinToServerRequest request = _requests[i];
        _requests.RemoveAt(i);
        if (this.OnRequestRemoved != null)
        {
            this.OnRequestRemoved(request);
        }
    }
 
    private void RemoveRequest(UserJoinToServerRequest request)
    {
        if (_requests.Remove(request) && this.OnRequestRemoved != null)
        {
            this.OnRequestRemoved(request);
        }
    }
}