Accidental Discharges (#3869)

* why does this keep crashing

* its real

* 12.5% -> 10%

* dependencyops

* commentops

* changeops

Content.Server/_DV/Weapons/Ranged/Components/FireOnLandComponent.cs

@@ -0,0 +1,11 @@
+namespace Content.Server._DV.Weapons.Ranged.Components;
+
+[RegisterComponent]
+public sealed partial class FireOnLandComponent : Component
+{
+    /// <summary>
+    /// Chance to trigger.
+    /// </summary>
+    [DataField]
+    public float Probability = 0.1f;
+}

Content.Server/_DV/Weapons/Ranged/Systems/FireOnLandSystem.cs

@@ -0,0 +1,31 @@
+using System.Numerics;
+using Content.Server._DV.Weapons.Ranged.Components;
+using Content.Server.Weapons.Ranged.Systems;
+using Content.Shared.Throwing;
+using Content.Shared.Weapons.Ranged.Components;
+using Robust.Shared.Map;
+using Robust.Shared.Random;
+
+namespace Content.Server._DV.Weapons.Ranged.Systems;
+
+public sealed class FireOnLandSystem : EntitySystem
+{
+    [Dependency] private readonly GunSystem _gunSystem = default!;
+    [Dependency] private readonly IRobustRandom _random = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+        SubscribeLocalEvent<FireOnLandComponent, LandEvent>(FireOnLand);
+    }
+
+    private void FireOnLand(Entity<FireOnLandComponent> ent, ref LandEvent args)
+    {
+        if (!_random.Prob(ent.Comp.Probability) || !TryComp(ent, out GunComponent? gc))
+            return;
+
+        var dir = gc.DefaultDirection;
+        dir = new Vector2(-dir.Y, dir.X); // 90 degrees counter-clockwise, guns shoot down by default
+        _gunSystem.AttemptShoot(ent, ent, gc, new EntityCoordinates(ent, dir));
+    }
+}

Resources/Prototypes/Entities/Objects/Weapons/Guns/Pistols/pistols.yml

@@ -68,6 +68,7 @@
   - type: Appearance
   - type: StaticPrice
     price: 500
+  - type: FireOnLand # DeltaV - gun safety
 
 - type: entity
   name: viper