CatStation/Content.Server/StationEvents/Events/AnomalySpawnRule.cs

using Content.Server.Anomaly;
using Content.Server.StationEvents.Components;
using Content.Shared.GameTicking.Components;
using Content.Shared.Station.Components;

namespace Content.Server.StationEvents.Events;

/// <summary>
/// Handler for events spawning an anomaly on station.
/// </summary>
/// <seealso cref="AnomalySpawnRuleComponent"/>
public sealed partial class AnomalySpawnRule : StationEventSystem<AnomalySpawnRuleComponent>
{
    [Dependency] private AnomalySystem _anomaly = default!;

    protected override void Added(Entity<AnomalySpawnRuleComponent, GameRuleComponent> ent, ref GameRuleAddedEvent args)
    {
        if (!TryComp<StationEventComponent>(ent, out var stationEvent))
            return;

        var str = Loc.GetString("anomaly-spawn-event-announcement",
            ("sighting", Loc.GetString($"anomaly-spawn-sighting-{RobustRandom.Next(1, 6)}")));
        stationEvent.StartAnnouncement = str;

        base.Added(ent, ref args);
    }

    protected override void Started(Entity<AnomalySpawnRuleComponent, GameRuleComponent> ent, ref GameRuleStartedEvent args)
    {
        base.Started(ent, ref args);

        if (!Station.TryGetRandomStation<StationEventEligibleComponent>(out var chosenStation))
            return;

        if (!TryComp<StationDataComponent>(chosenStation, out var stationData))
            return;

        var grid = Station.GetLargestGrid((chosenStation.Value, stationData));

        if (grid is null)
            return;

        var amountToSpawn = 1;
        for (var i = 0; i < amountToSpawn; i++)
        {
            _anomaly.SpawnOnRandomGridLocation(grid.Value, ent.Comp1.AnomalySpawnerPrototype);
        }
    }
}