ash storms just the facts

Content.Server/DeltaV/Weather/WeatherEffectsSystem.cs

@@ -0,0 +1,82 @@
+using Content.Shared.Damage;
+using Content.Shared.Mobs;
+using Content.Shared.Mobs.Components;
+using Content.Shared.Weather;
+using Content.Shared.Whitelist;
+using Robust.Shared.Map.Components;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Timing;
+
+namespace Content.Shared.DeltaV.Weather;
+
+/// <summary>
+/// Handles weather damage for exposed entities.
+/// </summary>
+public sealed partial class WeatherEffectsSystem : EntitySystem
+{
+    [Dependency] private readonly DamageableSystem _damageable = default!;
+    [Dependency] private readonly EntityWhitelistSystem _whitelist = default!;
+    [Dependency] private readonly IGameTiming _timing = default!;
+    [Dependency] private readonly IPrototypeManager _proto = default!;
+    [Dependency] private readonly SharedMapSystem _map = default!;
+    [Dependency] private readonly SharedWeatherSystem _weather = default!;
+
+    private EntityQuery<MapGridComponent> _gridQuery;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        _gridQuery = GetEntityQuery<MapGridComponent>();
+    }
+
+    public override void Update(float frameTime)
+    {
+        base.Update(frameTime);
+
+        var now = _timing.CurTime;
+        var query = EntityQueryEnumerator<WeatherComponent>();
+        while (query.MoveNext(out var map, out var weather))
+        {
+            if (now < weather.NextUpdate)
+                continue;
+
+            weather.NextUpdate = now + weather.UpdateDelay;
+
+            foreach (var (id, data) in weather.Weather)
+            {
+                // start and end do no damage
+                if (data.State != WeatherState.Running)
+                    continue;
+
+                UpdateDamage(map, id);
+            }
+        }
+    }
+
+    private void UpdateDamage(EntityUid map, ProtoId<WeatherPrototype> id)
+    {
+        var weather = _proto.Index(id);
+        if (weather.Damage is not {} damage)
+            return;
+
+        var query = EntityQueryEnumerator<MobStateComponent, TransformComponent>();
+        while (query.MoveNext(out var uid, out var mob, out var xform))
+        {
+            // don't give dead bodies 10000 burn, that's not fun for anyone
+            if (xform.MapUid != map || mob.CurrentState == MobState.Dead)
+                continue;
+
+            // if not in space, check for being indoors
+            if (xform.GridUid is {} gridUid && _gridQuery.TryComp(gridUid, out var grid))
+            {
+                var tile = _map.GetTileRef((gridUid, grid), xform.Coordinates);
+                if (!_weather.CanWeatherAffect(gridUid, grid, tile))
+                    continue;
+            }
+
+            if (_whitelist.IsBlacklistFailOrNull(weather.DamageBlacklist, uid))
+                _damageable.TryChangeDamage(uid, damage, interruptsDoAfters: false);
+        }
+    }
+}