Volume and pressure pump (#1955)

* PressurePump and VolumePump

* VolumePump fix

* PressurePump fix

* volume pump simplification

* Fixes GridAtmosphereComponent not updating pumps

Co-authored-by: py01 <pyronetics01@gmail.com>

Content.Server/GameObjects/Components/Atmos/Piping/Pumps/VolumePumpComponent.cs

@@ -0,0 +1,46 @@
+using Content.Server.Atmos;
+using Content.Shared.Atmos;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization;
+using Robust.Shared.ViewVariables;
+using System;
+using System.Diagnostics;
+
+namespace Content.Server.GameObjects.Components.Atmos.Piping.Pumps
+{
+    [RegisterComponent]
+    [ComponentReference(typeof(BasePumpComponent))]
+    public class VolumePumpComponent : BasePumpComponent
+    {
+        [ViewVariables(VVAccess.ReadWrite)]
+        public int VolumePumpRate
+        {
+            get => _volumePumpRate;
+            set => _volumePumpRate = Math.Clamp(value, 0, MaxVolumePumpRate);
+        }
+        private int _volumePumpRate;
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        public int MaxVolumePumpRate
+        {
+            get => _maxVolumePumpRate;
+            set => Math.Max(value, 0);
+        }
+        private int _maxVolumePumpRate;
+
+        public override string Name => "VolumePump";
+
+        public override void ExposeData(ObjectSerializer serializer)
+        {
+            base.ExposeData(serializer);
+            serializer.DataField(ref _volumePumpRate, "startingVolumePumpRate", 0);
+            serializer.DataField(ref _maxVolumePumpRate, "maxVolumePumpRate", 100);
+        }
+
+        protected override void PumpGas(GasMixture inletGas, GasMixture outletGas)
+        {
+            var volumeRatio = Math.Clamp(VolumePumpRate / inletGas.Volume, 0, 1);
+            outletGas.Merge(inletGas.RemoveRatio(volumeRatio));
+        }
+    }
+}