Added a witness counter to the essence regen alert

Content.Client/Revenant/RevenantRegenModifierSystem.cs

@@ -0,0 +1,26 @@
+using Content.Client.Alerts;
+using Content.Shared.Revenant;
+using Content.Shared.Revenant.Components;
+
+namespace Content.Client.Revenant;
+
+public sealed class RevenantRegenModifierSystem : EntitySystem
+{
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<RevenantRegenModifierComponent, UpdateAlertSpriteEvent>(OnUpdateAlert);
+    }
+
+    private void OnUpdateAlert(Entity<RevenantRegenModifierComponent> ent, ref UpdateAlertSpriteEvent args)
+    {
+        if (args.Alert.ID != ent.Comp.Alert)
+            return;
+
+        var sprite = args.SpriteViewEnt.Comp;
+        var witnesses = Math.Clamp(ent.Comp.Witnesses.Count, 0, 99);
+        sprite.LayerSetState(RevenantVisualLayers.Digit1, $"{witnesses / 10}");
+        sprite.LayerSetState(RevenantVisualLayers.Digit2, $"{witnesses % 10}");
+    }
+}

Content.Shared/Revenant/Components/RevenantRegenModifierComponent.cs

@@ -1,6 +1,6 @@
-
-
+using Content.Shared.Alert;
 using Robust.Shared.GameStates;
+using Robust.Shared.Prototypes;
 
 namespace Content.Shared.Revenant.Components;
 
@@ -9,4 +9,7 @@ public sealed partial class RevenantRegenModifierComponent : Component
 {
     [ViewVariables, AutoNetworkedField]
     public HashSet<NetEntity> Witnesses = new();
+
+    [DataField]
+    public ProtoId<AlertPrototype> Alert = "EssenceRegen";
 }

Resources/Prototypes/Alerts/revenant.yml

@@ -22,6 +22,7 @@
   icons:
     - sprite: /Textures/Mobs/Ghosts/revenant.rsi
       state: icon
+  alertViewEntity: AlertEssenceRegenSpriteView
 
 - type: alert
   id: Stasis
@@ -44,3 +45,14 @@
       offset: 0.125, 0
     - map: [ "enum.RevenantVisualLayers.Digit3" ]
       offset: 0.25, 0
+
+- type: entity
+  id: AlertEssenceRegenSpriteView
+  components:
+  - type: Sprite
+    sprite: /Textures/Interface/Alerts/essence_counter.rsi
+    layers:
+    - map: [ "enum.AlertVisualLayers.Base" ]
+    - map: [ "enum.RevenantVisualLayers.Digit1" ]
+    - map: [ "enum.RevenantVisualLayers.Digit2" ]
+      offset: 0.125, 0