Disposable turret explodes when empty (#18175)

* turret go boom

* fix ammo

* universal function name

* Also explodes when destroyed

* comment added

* Triggerwhenemptycomponent added

* comment adjusted

* Updated uplink description

* Moved to own event file

* file namespace

* rerun tests

---------

Co-authored-by: Slava0135 <super.novalskiy_0135@inbox.ru>

Content.Client/Weapons/Ranged/Systems/GunSystem.cs

@@ -2,7 +2,6 @@ using System.Numerics;
 using Content.Client.Items;
 using Content.Client.Weapons.Ranged.Components;
 using Content.Shared.Camera;
-using Content.Shared.Input;
 using Content.Shared.Spawners.Components;
 using Content.Shared.Weapons.Ranged;
 using Content.Shared.Weapons.Ranged.Components;

Content.Server/Explosion/Components/TriggerWhenEmptyComponent.cs

@@ -0,0 +1,9 @@
+namespace Content.Server.Explosion.Components;
+
+/// <summary>
+/// Triggers a gun when attempting to shoot while it's empty
+/// </summary>
+[RegisterComponent]
+public sealed class TriggerWhenEmptyComponent : Component
+{
+}

Content.Server/Explosion/EntitySystems/TriggerSystem.cs

@@ -22,7 +22,7 @@ using Robust.Shared.Physics.Events;
 using Robust.Shared.Physics.Systems;
 using Content.Shared.Mobs;
 using Content.Shared.Mobs.Components;
-using Robust.Shared.Player;
+using Content.Shared.Weapons.Ranged.Events;
 
 namespace Content.Server.Explosion.EntitySystems
 {
@@ -77,6 +77,7 @@ namespace Content.Server.Explosion.EntitySystems
             SubscribeLocalEvent<TriggerImplantActionComponent, ActivateImplantEvent>(OnImplantTrigger);
             SubscribeLocalEvent<TriggerOnStepTriggerComponent, StepTriggeredEvent>(OnStepTriggered);
             SubscribeLocalEvent<TriggerOnSlipComponent, SlipEvent>(OnSlipTriggered);
+            SubscribeLocalEvent<TriggerWhenEmptyComponent, OnEmptyGunShotEvent>(OnEmptyTriggered);
 
             SubscribeLocalEvent<SpawnOnTriggerComponent, TriggerEvent>(OnSpawnTrigger);
             SubscribeLocalEvent<DeleteOnTriggerComponent, TriggerEvent>(HandleDeleteTrigger);
@@ -186,6 +187,11 @@ namespace Content.Server.Explosion.EntitySystems
             Trigger(uid, args.Slipped);
         }
 
+        private void OnEmptyTriggered(EntityUid uid, TriggerWhenEmptyComponent component, ref OnEmptyGunShotEvent args)
+        {
+            Trigger(uid, args.EmptyGun);
+        }
+
         public bool Trigger(EntityUid trigger, EntityUid? user = null)
         {
             var triggerEvent = new TriggerEvent(trigger, user);

Content.Shared/Weapons/Ranged/Events/OnEmptyGunShotEvent.cs

@@ -0,0 +1,7 @@
+namespace Content.Shared.Weapons.Ranged.Events;
+
+/// <summary>
+/// Raised directed on the gun when trying to fire it while it's out of ammo
+/// </summary>
+[ByRefEvent]
+public record struct OnEmptyGunShotEvent(EntityUid EmptyGun);

Content.Shared/Weapons/Ranged/Systems/SharedGunSystem.Ballistic.cs

@@ -130,15 +130,14 @@ public abstract partial class SharedGunSystem
 
     private void OnBallisticVerb(EntityUid uid, BallisticAmmoProviderComponent component, GetVerbsEvent<Verb> args)
     {
-        if (!args.CanAccess || !args.CanInteract || args.Hands == null)
+        if (!args.CanAccess || !args.CanInteract || args.Hands == null || !component.Cycleable)
             return;
-        if (component.Cycleable == true)
-            args.Verbs.Add(new Verb()
-            {
-                Text = Loc.GetString("gun-ballistic-cycle"),
-                Disabled = GetBallisticShots(component) == 0,
-                Act = () => ManualCycle(uid, component, Transform(uid).MapPosition, args.User),
-            });
+        args.Verbs.Add(new Verb()
+        {
+            Text = Loc.GetString("gun-ballistic-cycle"),
+            Disabled = GetBallisticShots(component) == 0,
+            Act = () => ManualCycle(uid, component, Transform(uid).MapPosition, args.User),
+        });
     }
 
     private void OnBallisticExamine(EntityUid uid, BallisticAmmoProviderComponent component, ExaminedEvent args)
@@ -151,6 +150,9 @@ public abstract partial class SharedGunSystem
 
     private void ManualCycle(EntityUid uid, BallisticAmmoProviderComponent component, MapCoordinates coordinates, EntityUid? user = null, GunComponent? gunComp = null)
     {
+        if (!component.Cycleable)
+            return;
+
         // Reset shotting for cycling
         if (Resolve(uid, ref gunComp, false) &&
             gunComp is { FireRate: > 0f } &&

Content.Shared/Weapons/Ranged/Systems/SharedGunSystem.cs

@@ -7,7 +7,6 @@ using Content.Shared.Damage;
 using Content.Shared.Examine;
 using Content.Shared.Gravity;
 using Content.Shared.Hands.Components;
-using Content.Shared.Interaction.Events;
 using Content.Shared.Popups;
 using Content.Shared.Projectiles;
 using Content.Shared.Tag;
@@ -304,6 +303,10 @@ public abstract partial class SharedGunSystem : EntitySystem
 
         if (ev.Ammo.Count <= 0)
         {
+            // triggers effects on the gun if it's empty
+            var emptyGunShotEvent = new OnEmptyGunShotEvent();
+            RaiseLocalEvent(gunUid, ref emptyGunShotEvent);
+
             // Play empty gun sounds if relevant
             // If they're firing an existing clip then don't play anything.
             if (shots > 0)

Resources/Locale/en-US/store/uplink-catalog.ftl

@@ -212,7 +212,7 @@ uplink-proximity-mine-name = Proximity Mine
 uplink-proximity-mine-desc = A mine disguised as a wet floor sign.
 
 uplink-disposable-turret-name = Disposable Ballistic Turret
-uplink-disposable-turret-desc = Looks and functions like a normal electrical toolbox. Upon hitting the toolbox it will transform into a ballistic turret, theoretically shooting at anyone except members of the syndicate.
+uplink-disposable-turret-desc = Looks and functions like a normal electrical toolbox. Upon hitting the toolbox it will transform into a ballistic turret, theoretically shooting at anyone except members of the syndicate. Can be turned back into a toolbox using a screwdriver and repaired using a wrench.
 
 # Armor
 uplink-chameleon-name = Chameleon Kit

Resources/Prototypes/Entities/Objects/Weapons/Guns/turrets.yml

@@ -143,14 +143,7 @@
           behaviors:
             - !type:DoActsBehavior
               acts: [ "Destruction" ]
-            - !type:PlaySoundBehavior
-              sound:
-                path: /Audio/Effects/metalbreak.ogg
-            - !type:SpawnEntitiesBehavior
-              spawn:
-                WeaponTurretSyndicateBroken:
-                  min: 1
-                  max: 1
+            - !type:TriggerBehavior
     - type: Gun
       fireRate: 2
       selectedMode: FullAuto
@@ -168,6 +161,14 @@
     - type: Repairable
       qualityNeeded: "Anchoring"
       doAfterDelay: 3
+    - type: TriggerWhenEmpty
+    - type: ExplodeOnTrigger
+    - type: Explosive
+      explosionType: Default
+      maxIntensity: 10
+      intensitySlope: 1.5
+      totalIntensity: 30
+      canCreateVacuum: false
 
 - type: entity
   parent: BaseWeaponTurret