From 37997d4dda83d1e98e460e889d680ea0acbcc017 Mon Sep 17 00:00:00 2001
From: corentt <36075110+corentt@users.noreply.github.com>
Date: Tue, 8 Nov 2022 21:23:41 +0100
Subject: [PATCH] Stop reducing output pressure of gastank when low pressure
 (#11818)

* stop reducing output of gastank when low pressure

* fix display internal alert

* rephrase moles quantity check
---
 Content.Server/Atmos/EntitySystems/GasTankSystem.cs | 7 -------
 Content.Server/Body/Systems/InternalsSystem.cs      | 4 +++-
 2 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/Content.Server/Atmos/EntitySystems/GasTankSystem.cs b/Content.Server/Atmos/EntitySystems/GasTankSystem.cs
index 56b1003c4e..27dfeea451 100644
--- a/Content.Server/Atmos/EntitySystems/GasTankSystem.cs
+++ b/Content.Server/Atmos/EntitySystems/GasTankSystem.cs
@@ -168,13 +168,6 @@ namespace Content.Server.Atmos.EntitySystems
             if (component.Air == null)
                 return new GasMixture(volume);
 
-            var tankPressure = component.Air.Pressure;
-            if (tankPressure < component.OutputPressure)
-            {
-                component.OutputPressure = tankPressure;
-                UpdateUserInterface(component);
-            }
-
             var molesNeeded = component.OutputPressure * volume / (Atmospherics.R * component.Air.Temperature);
 
             var air = RemoveAir(component, molesNeeded);
diff --git a/Content.Server/Body/Systems/InternalsSystem.cs b/Content.Server/Body/Systems/InternalsSystem.cs
index ecb8d1363a..d7cce25c7b 100644
--- a/Content.Server/Body/Systems/InternalsSystem.cs
+++ b/Content.Server/Body/Systems/InternalsSystem.cs
@@ -113,7 +113,9 @@ public sealed class InternalsSystem : EntitySystem
     {
         if (component.BreathToolEntity == null || !AreInternalsWorking(component)) return 2;
 
-        if (TryComp<GasTankComponent>(component.GasTankEntity, out var gasTank) && gasTank.Air.Volume < Atmospherics.BreathVolume)
+        // What we are checking here is if there is more moles in tank than we need.
+        if (TryComp<GasTankComponent>(component.GasTankEntity, out var gasTank)
+            && (gasTank.OutputPressure * Atmospherics.BreathVolume / Atmospherics.R * gasTank.Air.Temperature) >= gasTank.Air.TotalMoles)
             return 0;
 
         return 1;