Adds jittering. (#4809)

Co-authored-by: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>

Content.Server/Administration/Commands/RejuvenateCommand.cs

@@ -5,6 +5,7 @@ using Content.Server.Nutrition.EntitySystems;
 using Content.Server.Stunnable.Components;
 using Content.Shared.Administration;
 using Content.Shared.Damage;
+using Content.Shared.Jittering;
 using Content.Shared.MobState;
 using Content.Shared.Nutrition.Components;
 using Robust.Server.Player;
@@ -71,6 +72,11 @@ namespace Content.Server.Administration.Commands
             {
                 EntitySystem.Get<CreamPieSystem>().SetCreamPied(target.Uid, creamPied, false);
             }
+
+            if (target.HasComponent<JitteringComponent>())
+            {
+                target.RemoveComponent<JitteringComponent>();
+            }
         }
     }
 }

Content.Server/Jittering/JitteringSystem.cs

@@ -0,0 +1,9 @@
+using Content.Shared.Jittering;
+
+namespace Content.Server.Jittering
+{
+    public class JitteringSystem : SharedJitteringSystem
+    {
+        // This entity system only exists on the server so it will be registered, otherwise we can't use SharedJitteringSystem...
+    }
+}

Content.Server/Stunnable/StunbatonSystem.cs

@@ -1,5 +1,7 @@
+using System;
 using System.Linq;
 using Content.Server.Items;
+using Content.Server.Jittering;
 using Content.Server.PowerCell.Components;
 using Content.Server.Stunnable.Components;
 using Content.Server.Weapon.Melee;
@@ -70,6 +72,8 @@ namespace Content.Server.Stunnable
             if (!Get<ActionBlockerSystem>().CanUse(args.User))
                 return;
 
+            Get<JitteringSystem>().DoJitter(args.User.Uid, TimeSpan.FromMinutes(1), 20f, 8f);
+
             if (comp.Activated)
             {
                 TurnOff(comp);