CatStation/Content.Server/Magic/MagicSystem.cs

using Content.Server.Chat.Systems;
using Content.Server.GameTicking;
using Content.Server.GameTicking.Rules.Components;
using Content.Shared.Magic;
using Content.Shared.Magic.Events;
using Content.Shared.Mind;
using Content.Shared.Tag;
using Robust.Shared.Prototypes;

namespace Content.Server.Magic;

public sealed partial class MagicSystem : SharedMagicSystem
{
    [Dependency] private ChatSystem _chat = default!;
    [Dependency] private GameTicker _gameTicker = default!;
    [Dependency] private TagSystem _tag = default!;
    [Dependency] private SharedMindSystem _mind = default!;

    private static readonly ProtoId<TagPrototype> InvalidForSurvivorAntagTag = "InvalidForSurvivorAntag";
    private static readonly EntProtoId SurvivorGameRule = "Survivor";

    public override void Initialize()
    {
        base.Initialize();
    }

    public override void OnVoidApplause(VoidApplauseSpellEvent ev)
    {
        base.OnVoidApplause(ev);

        _chat.TryEmoteWithChat(ev.Performer, ev.Emote);

        var perfXForm = Transform(ev.Performer);
        var targetXForm = Transform(ev.Target);

        Spawn(ev.Effect, perfXForm.Coordinates);
        Spawn(ev.Effect, targetXForm.Coordinates);
    }

    protected override void OnRandomGlobalSpawnSpell(RandomGlobalSpawnSpellEvent ev)
    {
        base.OnRandomGlobalSpawnSpell(ev);

        if (!ev.MakeSurvivorAntagonist)
            return;

        if (_mind.TryGetMind(ev.Performer, out var mind, out _) && !_tag.HasTag(mind, InvalidForSurvivorAntagTag))
            _tag.AddTag(mind, InvalidForSurvivorAntagTag);

        if (!_gameTicker.IsGameRuleActive<SurvivorRuleComponent>())
            _gameTicker.StartGameRule(SurvivorGameRule);
    }
}