Adds force-gun (#16561)

Content.Shared/Weapons/Misc/SharedTetherGunSystem.Force.cs

@@ -0,0 +1,54 @@
+using Content.Shared.Interaction;
+using Robust.Shared.Map;
+
+namespace Content.Shared.Weapons.Misc;
+
+public abstract partial class SharedTetherGunSystem
+{
+    private void InitializeForce()
+    {
+        SubscribeLocalEvent<ForceGunComponent, AfterInteractEvent>(OnForceRanged);
+        SubscribeLocalEvent<ForceGunComponent, ActivateInWorldEvent>(OnForceActivate);
+    }
+
+    private void OnForceActivate(EntityUid uid, ForceGunComponent component, ActivateInWorldEvent args)
+    {
+        StopTether(uid, component);
+    }
+
+    private void OnForceRanged(EntityUid uid, ForceGunComponent component, AfterInteractEvent args)
+    {
+        if (IsTethered(component))
+        {
+            if (!args.ClickLocation.TryDistance(EntityManager, TransformSystem, Transform(uid).Coordinates,
+                    out var distance) ||
+                distance > component.ThrowDistance)
+            {
+                return;
+            }
+
+            // URGH, soon
+            // Need auto states to be nicer + powercelldraw to be nicer
+            if (!_netManager.IsServer)
+                return;
+
+            // Launch
+            var tethered = component.Tethered;
+            StopTether(uid, component, land: false);
+            _throwing.TryThrow(tethered!.Value, args.ClickLocation, component.ThrowForce, playSound: false);
+
+            _audio.PlayPredicted(component.LaunchSound, uid, null);
+        }
+        else if (args.Target != null)
+        {
+            // Pickup
+            if (TryTether(uid, args.Target.Value, args.User, component))
+                TransformSystem.SetCoordinates(component.TetherEntity!.Value, new EntityCoordinates(uid, new Vector2(0.0f, -0.8f)));
+        }
+    }
+
+    private bool IsTethered(ForceGunComponent component)
+    {
+        return component.Tethered != null;
+    }
+}