Add alert for low oxygen.

Content.Server/GameObjects/Components/Metabolism/MetabolismComponent.cs

@@ -5,7 +5,9 @@ using System.Linq;
 using Content.Server.Atmos;
 using Content.Server.GameObjects.Components.Body.Behavior;
 using Content.Server.GameObjects.Components.Body.Circulatory;
+using Content.Server.GameObjects.Components.Mobs;
 using Content.Server.GameObjects.Components.Temperature;
+using Content.Shared.Alert;
 using Content.Shared.Atmos;
 using Content.Shared.Chemistry;
 using Content.Shared.Damage;
@@ -389,6 +391,11 @@ namespace Content.Server.GameObjects.Components.Metabolism
         {
             Suffocating = true;
 
+            if (Owner.TryGetComponent(out ServerAlertsComponent? alertsComponent))
+            {
+                alertsComponent.ShowAlert(AlertType.LowOxygen);
+            }
+
             if (!Owner.TryGetComponent(out IDamageableComponent? damageable))
             {
                 return;
@@ -400,6 +407,11 @@ namespace Content.Server.GameObjects.Components.Metabolism
         private void StopSuffocation()
         {
             Suffocating = false;
+
+            if (Owner.TryGetComponent(out ServerAlertsComponent? alertsComponent))
+            {
+                alertsComponent.ClearAlert(AlertType.LowOxygen);
+            }
         }
 
         public GasMixture Clean(BloodstreamComponent bloodstream)

Content.Shared/Alert/AlertType.cs

@@ -7,6 +7,7 @@
     {
         Pressure,
         Temperature,
+        Breathing,
         Buckled,
         Health,
         Piloting,
@@ -22,6 +23,7 @@
     public enum AlertType : byte
     {
         Error,
+        LowOxygen,
         LowPressure,
         HighPressure,
         Fire,

Resources/Prototypes/Alerts/alerts.yml

@@ -10,12 +10,20 @@
     - alertType: Pulling
     - category: Piloting
     - alertType: Stun
+    - category: Breathing # Vox gang not calling this oxygen
     - category: Pressure
     - category: Temperature
     - category: Hunger
     - category: Thirst
 
-
+- type: alert
+  alertType: LowOxygen
+  category: Breathing
+  icon:
+    sprite: /Textures/Interface/Alerts/breathing.rsi
+    state: not_enough_oxy
+  name: "[color=red]Low Oxygen[/color]"
+  description: "There is not [color=red]not enough oxygen[/color] in the air you are breathing. Put on [color=green]internals[/color]."
 
 - type: alert
   alertType: LowPressure

Resources/Textures/Interface/Alerts/breathing.rsi/meta.json

@@ -0,0 +1 @@
+{"version": 1, "size": {"x": 32, "y": 32}, "license": "CC-BY-SA 3.0", "copyright": "https://github.com/tgstation/tgstation/blob/2f18e6232ce5897554351194082469a043c5ab06/icons/hud/screen_alert.dmi", "states": [{"name": "not_enough_co2", "directions": 1, "delays": [[0.5, 0.5]]}, {"name": "not_enough_nitro", "directions": 1, "delays": [[0.5, 0.5]]}, {"name": "not_enough_oxy", "directions": 1, "delays": [[0.5, 0.5]]}, {"name": "not_enough_tox", "directions": 1, "delays": [[0.5, 0.5]]}, {"name": "too_much_co2", "directions": 1, "delays": [[0.5, 0.5]]}, {"name": "too_much_nitro", "directions": 1, "delays": [[0.5, 0.5]]}, {"name": "too_much_oxy", "directions": 1, "delays": [[0.5, 0.5]]}, {"name": "too_much_tox", "directions": 1, "delays": [[0.5, 0.5]]}]}