Predict dumping (#32394)

* Predict dumping

- This got soaped really fucking hard.
- Dumping is predicted, this required disposals to be predicte.d
- Disposals required mailing (because it's tightly coupled), and a smidge of other content systems.
- I also had to fix a compnetworkgenerator issue at the same time so it wouldn't mispredict.

* Fix a bunch of stuff

* nasty merge

* Some reviews

* Some more reviews while I stash

* Fix merge

* Fix merge

* Half of review

* Review

* re(h)f

* lizards

* feexes

* feex

Content.Server/Disposal/Unit/DisposalUnitSystem.cs

@@ -0,0 +1,44 @@
+using Content.Server.Atmos.EntitySystems;
+using Content.Shared.Atmos;
+using Content.Shared.Destructible;
+using Content.Shared.Disposal.Components;
+using Content.Shared.Disposal.Unit;
+using Content.Shared.Explosion;
+
+namespace Content.Server.Disposal.Unit;
+
+public sealed class DisposalUnitSystem : SharedDisposalUnitSystem
+{
+    [Dependency] private readonly AtmosphereSystem _atmosSystem = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<DisposalUnitComponent, DestructionEventArgs>(OnDestruction);
+        SubscribeLocalEvent<DisposalUnitComponent, BeforeExplodeEvent>(OnExploded);
+    }
+
+    protected override void HandleAir(EntityUid uid, DisposalUnitComponent component, TransformComponent xform)
+    {
+        var air = component.Air;
+        var indices = TransformSystem.GetGridTilePositionOrDefault((uid, xform));
+
+        if (_atmosSystem.GetTileMixture(xform.GridUid, xform.MapUid, indices, true) is { Temperature: > 0f } environment)
+        {
+            var transferMoles = 0.1f * (0.25f * Atmospherics.OneAtmosphere * 1.01f - air.Pressure) * air.Volume / (environment.Temperature * Atmospherics.R);
+
+            component.Air = environment.Remove(transferMoles);
+        }
+    }
+
+    private void OnDestruction(EntityUid uid, DisposalUnitComponent component, DestructionEventArgs args)
+    {
+        TryEjectContents(uid, component);
+    }
+
+    private void OnExploded(Entity<DisposalUnitComponent> ent, ref BeforeExplodeEvent args)
+    {
+        args.Contents.AddRange(ent.Comp.Container.ContainedEntities);
+    }
+}