Don't spawn all bullets in a magazine until necessary.

Content.Server/GameObjects/Components/Weapon/Ranged/Projectile/BallisticMagazineComponent.cs

@@ -17,29 +17,23 @@ namespace Content.Server.GameObjects.Components.Weapon.Ranged.Projectile
         public override string Name => "BallisticMagazine";
 
         // Stack of loaded bullets.
-        [ViewVariables]
-        private readonly Stack<IEntity> _loadedBullets = new Stack<IEntity>();
-        [ViewVariables]
-        private string _fillType;
+        [ViewVariables] private readonly Stack<IEntity> _loadedBullets = new Stack<IEntity>();
+        [ViewVariables] private string _fillType;
 
-        [ViewVariables]
-        private Container _bulletContainer;
-        [ViewVariables]
-        private AppearanceComponent _appearance;
+        [ViewVariables] private Container _bulletContainer;
+        [ViewVariables] private AppearanceComponent _appearance;
 
         private BallisticMagazineType _magazineType;
         private BallisticCaliber _caliber;
         private int _capacity;
 
-        [ViewVariables]
-        public BallisticMagazineType MagazineType => _magazineType;
-        [ViewVariables]
-        public BallisticCaliber Caliber => _caliber;
-        [ViewVariables]
-        public int Capacity => _capacity;
+        [ViewVariables] public BallisticMagazineType MagazineType => _magazineType;
+        [ViewVariables] public BallisticCaliber Caliber => _caliber;
+        [ViewVariables] public int Capacity => _capacity;
 
-        [ViewVariables]
-        public int CountLoaded => _loadedBullets.Count;
+        [ViewVariables] public int CountLoaded => _loadedBullets.Count + _availableSpawnCount;
+
+        [ViewVariables] private int _availableSpawnCount;
 
         public event Action OnAmmoCountChanged;
 
@@ -51,6 +45,7 @@ namespace Content.Server.GameObjects.Components.Weapon.Ranged.Projectile
             serializer.DataField(ref _caliber, "caliber", BallisticCaliber.Unspecified);
             serializer.DataField(ref _fillType, "fill", null);
             serializer.DataField(ref _capacity, "capacity", 20);
+            serializer.DataField(ref _availableSpawnCount, "availableSpawnCount", 0);
         }
 
         public override void Initialize()
@@ -93,6 +88,11 @@ namespace Content.Server.GameObjects.Components.Weapon.Ranged.Projectile
                 throw new ArgumentException("entity is of the wrong caliber.", nameof(bullet));
             }
 
+            if (CountLoaded >= Capacity)
+            {
+                throw new InvalidOperationException("Magazine is full.");
+            }
+
             _bulletContainer.Insert(bullet);
             _loadedBullets.Push(bullet);
             _updateAppearance();
@@ -101,12 +101,23 @@ namespace Content.Server.GameObjects.Components.Weapon.Ranged.Projectile
 
         public IEntity TakeBullet()
         {
+            IEntity bullet;
             if (_loadedBullets.Count == 0)
             {
-                return null;
+                if (_availableSpawnCount == 0)
+                {
+                    return null;
+                }
+
+                _availableSpawnCount -= 1;
+                bullet = Owner.EntityManager.SpawnEntity(_fillType);
+            }
+            else
+            {
+                bullet = _loadedBullets.Pop();
+                _bulletContainer.Remove(bullet);
             }
 
-            var bullet = _loadedBullets.Pop();
             _updateAppearance();
             OnAmmoCountChanged?.Invoke();
             return bullet;
@@ -117,51 +128,53 @@ namespace Content.Server.GameObjects.Components.Weapon.Ranged.Projectile
             _appearance.SetData(BallisticMagazineVisuals.AmmoLeft, CountLoaded);
         }
 
-        void IMapInit.MapInit()
+        public void MapInit()
         {
-            if (_fillType == null)
-            {
-                return;
-            }
-
-            // Load up bullets from fill.
-            for (var i = 0; i < Capacity; i++)
-            {
-                var bullet = Owner.EntityManager.SpawnEntity(_fillType);
-                AddBullet(bullet);
-            }
+            _availableSpawnCount = Capacity;
         }
     }
 
     public enum BallisticMagazineType
     {
         Unspecified = 0,
+
         // .32
         A32,
+
         // .357
         A357,
+
         // .44
         A44,
+
         // .45mm
         A45mm,
+
         // .50 cal
         A50,
+
         // 5.56mm
         A556mm,
+
         // 6.5mm
         A65mm,
+
         // 7.62mm
         A762mm,
         Maxim,
+
         // 9mm
         A9mm,
         A9mmSMG,
         A9mmTopMounted,
+
         // 10mm
         A10mm,
         A10mmSMG,
+
         // 20mm
         A20mm,
+
         // 24mm
         A24mm,
     }