Disposals air + new atmos expose event (#6798)

Co-authored-by: Vera Aguilera Puerto <6766154+Zumorica@users.noreply.github.com>

Content.Server/Atmos/EntitySystems/AtmosExposedSystem.cs

@@ -24,4 +24,10 @@ namespace Content.Server.Atmos.EntitySystems
             GasMixture = mixture;
         }
     }
+
+    [ByRefEvent]
+    public struct AtmosExposedGetAirEvent
+    {
+        public GasMixture? Gas;
+    }
 }

Content.Server/Atmos/EntitySystems/AtmosphereSystem.cs

@@ -85,9 +85,15 @@ namespace Content.Server.Atmos.EntitySystems
 
             foreach (var (exposed, transform) in EntityManager.EntityQuery<AtmosExposedComponent, TransformComponent>())
             {
-                var tile = GetTileMixture(transform.Coordinates);
-                if (tile == null) continue;
-                var updateEvent = new AtmosExposedUpdateEvent(transform.Coordinates, tile);
+                // Used for things like disposals/cryo to change which air people are exposed to.
+                var airEvent = new AtmosExposedGetAirEvent();
+                RaiseLocalEvent(exposed.Owner, ref airEvent, false);
+
+                airEvent.Gas ??= GetTileMixture(transform.Coordinates);
+                if (airEvent.Gas == null)
+                    continue;
+
+                var updateEvent = new AtmosExposedUpdateEvent(transform.Coordinates, airEvent.Gas);
                 RaiseLocalEvent(exposed.Owner, ref updateEvent);
             }
 

Content.Server/Disposal/Unit/Components/BeingDisposedComponent.cs

@@ -0,0 +1,11 @@
+namespace Content.Server.Disposal.Unit.Components;
+
+/// <summary>
+///     A component added to entities that are currently in disposals.
+/// </summary>
+[RegisterComponent]
+public sealed class BeingDisposedComponent : Component
+{
+    [ViewVariables]
+    public EntityUid Holder;
+}

Content.Server/Disposal/Unit/Components/DisposalHolderComponent.cs

@@ -63,7 +63,7 @@ namespace Content.Server.Disposal.Unit.Components
 
         [ViewVariables]
         [DataField("air")]
-        public GasMixture Air { get; set; } = new GasMixture(Atmospherics.CellVolume);
+        public GasMixture Air { get; set; } = new (70);
 
         protected override void Initialize()
         {

Content.Server/Disposal/Unit/EntitySystems/BeingDisposedSystem.cs

@@ -0,0 +1,40 @@
+using Content.Server.Atmos.EntitySystems;
+using Content.Server.Disposal.Unit.Components;
+
+namespace Content.Server.Disposal.Unit.EntitySystems;
+
+public sealed class BeingDisposedSystem : EntitySystem
+{
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<BeingDisposedComponent, InhaleLocationEvent>(OnInhaleLocation);
+        SubscribeLocalEvent<BeingDisposedComponent, ExhaleLocationEvent>(OnExhaleLocation);
+        SubscribeLocalEvent<BeingDisposedComponent, AtmosExposedGetAirEvent>(OnGetAir);
+    }
+
+    private void OnGetAir(EntityUid uid, BeingDisposedComponent component, ref AtmosExposedGetAirEvent args)
+    {
+        if (TryComp<DisposalHolderComponent>(component.Holder, out var holder))
+        {
+            args.Gas = holder.Air;
+        }
+    }
+
+    private void OnInhaleLocation(EntityUid uid, BeingDisposedComponent component, InhaleLocationEvent args)
+    {
+        if (TryComp<DisposalHolderComponent>(component.Holder, out var holder))
+        {
+            args.Gas = holder.Air;
+        }
+    }
+
+    private void OnExhaleLocation(EntityUid uid, BeingDisposedComponent component, ExhaleLocationEvent args)
+    {
+        if (TryComp<DisposalHolderComponent>(component.Holder, out var holder))
+        {
+            args.Gas = holder.Air;
+        }
+    }
+}

Content.Server/Disposal/Unit/EntitySystems/DisposableSystem.cs

@@ -47,6 +47,9 @@ namespace Content.Server.Disposal.Unit.EntitySystems
 
             foreach (var entity in holder.Container.ContainedEntities.ToArray())
             {
+                if (HasComp<BeingDisposedComponent>(entity))
+                    RemComp <BeingDisposedComponent>(entity);
+
                 if (EntityManager.TryGetComponent(entity, out IPhysBody? physics))
                 {
                     physics.CanCollide = true;
@@ -101,6 +104,12 @@ namespace Content.Server.Disposal.Unit.EntitySystems
                 return false;
             }
 
+            foreach (var ent in holder.Container.ContainedEntities)
+            {
+                var comp = EnsureComp<BeingDisposedComponent>(ent);
+                comp.Holder = holder.Owner;
+            }
+
             // Insert into next tube
             holderTransform.Coordinates = new EntityCoordinates(toUid, Vector2.Zero);
             if (!to.Contents.Insert(holder.Owner))

Content.Server/Disposal/Unit/EntitySystems/DisposalUnitSystem.cs

@@ -486,7 +486,7 @@ namespace Content.Server.Disposal.Unit.EntitySystems
 
             if (_atmosSystem.GetTileMixture(EntityManager.GetComponent<TransformComponent>(component.Owner).Coordinates, true) is {Temperature: > 0} environment)
             {
-                var transferMoles = 0.1f * (0.05f * Atmospherics.OneAtmosphere * 1.01f - air.Pressure) * air.Volume / (environment.Temperature * Atmospherics.R);
+                var transferMoles = 0.1f * (0.25f * Atmospherics.OneAtmosphere * 1.01f - air.Pressure) * air.Volume / (environment.Temperature * Atmospherics.R);
 
                 component.Air = environment.Remove(transferMoles);
             }