crystall-punk-14/Content.Server/GameTicking/GameTicker.LobbyBackground.cs

using Content.Server.GameTicking.Prototypes;
using Robust.Shared.Random;
using Robust.Shared.Utility;
using System.Linq;

namespace Content.Server.GameTicking;

public sealed partial class GameTicker
{
    [ViewVariables]
    public string? LobbyBackground { get; private set; }

    [ViewVariables]
    private List<ResourcePath>? _lobbyBackgrounds;

    private static readonly string[] WhitelistedBackgroundExtensions = new string[] {"png", "jpg", "jpeg"};

    private void InitializeLobbyBackground()
    {
        _lobbyBackgrounds = _prototypeManager.EnumeratePrototypes<LobbyBackgroundPrototype>()
            .Select(x => x.Background)
            .Where(x => WhitelistedBackgroundExtensions.Contains(x.Extension))
            .ToList();

        RandomizeLobbyBackground();
    }

    private void RandomizeLobbyBackground() {
        LobbyBackground = _lobbyBackgrounds!.Any() ? _robustRandom.Pick(_lobbyBackgrounds!).ToString() : null;
    }
}