Ability to switch weapons through the menu

Resources/Weapons/Cheat_Gun.tres

@@ -15,5 +15,6 @@ InfiniteAmmo = true
 BulletsPerShot = 1
 SpreadAngle = 0.0
 RandomSpread = 0.0
+ItemKey = "CheatGun"
 AmmoKey = ""
 _rotationOffset = 0.0

Resources/Weapons/EnemyWeapon.tres

@@ -15,5 +15,6 @@ InfiniteAmmo = true
 BulletsPerShot = 5
 SpreadAngle = 180.0
 RandomSpread = 0.0
+ItemKey = "EnemyWeapon"
 AmmoKey = ""
 _rotationOffset = 0.0

Resources/Weapons/EnemyWeapon_simple.tres

@@ -15,5 +15,6 @@ InfiniteAmmo = true
 BulletsPerShot = 1
 SpreadAngle = 0.0
 RandomSpread = 0.0
+ItemKey = "EnemyWeapon_Simple"
 AmmoKey = ""
 _rotationOffset = 0.0

Resources/Weapons/Ice_Shotgun_Weapon.tres

@@ -15,5 +15,6 @@ InfiniteAmmo = false
 BulletsPerShot = 3
 SpreadAngle = 15.0
 RandomSpread = 0.0
+ItemKey = "IceShotgun"
 AmmoKey = "Ammo1"
 _rotationOffset = 0.0

Resources/Weapons/IcicleGun.tres

@@ -15,5 +15,6 @@ InfiniteAmmo = true
 BulletsPerShot = 1
 SpreadAngle = 0.0
 RandomSpread = 0.0
+ItemKey = "IcicleGun"
 AmmoKey = ""
 _rotationOffset = 0.0

Resources/Weapons/IcicleRepeater.tres

@@ -15,5 +15,6 @@ InfiniteAmmo = true
 BulletsPerShot = 1
 SpreadAngle = 0.0
 RandomSpread = 0.0
+ItemKey = "IcicleRepeater"
 AmmoKey = ""
 _rotationOffset = 0.0

Scripts/GameManager.cs

@@ -133,7 +133,7 @@ public partial class GameManager : Node2D
             _player.ShieldChanged += (newShield, maxShield) => _hud.UpdateShield(newShield, maxShield);
 
             _player.InteractableAreaEntered += (interactable) => _hud.UpdateInteractable(interactable);
-
+            
             _player.Death += () =>
             {
                 // Show Game Over
@@ -155,6 +155,8 @@ public partial class GameManager : Node2D
                     SpawnPlayerWeapon(item);
                 }
             };
+
+            _inventoryManager.WeaponEquip += _player.EquipWeapon;
         }
         
         SpawnWeapons();

Scripts/InventoryManager.cs

@@ -11,13 +11,16 @@ public partial class InventoryManager : Node2D
 	
 	private Dictionary<string, ItemContainer> _itemsDict = new Dictionary<string, ItemContainer>();
 	
-	public Dictionary<string, ItemContainer> Items => _itemsDict;
+	public List<ItemContainer> Items => _itemsDict.Where(x => x.Value.Count > 0).Select(x => x.Value).ToList();
 	
 	[Signal]
 	public delegate void ItemAddedEventHandler(LootItem item, int currentAmount);
 	
 	[Signal]
 	public delegate void ItemRemovedEventHandler(string itemKey, int currentAmount);
+
+	[Signal]
+	public delegate void WeaponEquipEventHandler(string itemKey);
 	
 	// Called when the node enters the scene tree for the first time.
 	public override void _Ready()
@@ -105,6 +108,37 @@ public partial class InventoryManager : Node2D
 	{
 		RedKeycard = false;
 	}
+
+	public bool UseItem(string itemKey)
+	{
+		if (!_itemsDict.TryGetValue(itemKey, out var itm)) return false;
+
+		if (itm.Count == 0) return false;
+
+		switch (itm.Item.Item)
+		{
+			case ItemTypes.Medkit:
+				// Heal
+				break;
+			case ItemTypes.FrogBomb:
+				// Use Bomb
+				break;
+			case ItemTypes.Bomb:
+				// Bomb
+				break;
+			case ItemTypes.Mine:
+				break;
+			case ItemTypes.Battery:
+				break;
+			case ItemTypes.Weapon:
+				// Equip weapon
+				EmitSignal(SignalName.WeaponEquip, itm.Item.ItemKey);
+				break;
+			
+		}
+		
+		return true;
+	}
 }
 
 public class ItemContainer

Scripts/PlayerMovement.cs

@@ -206,6 +206,16 @@ public partial class PlayerMovement : CharacterBody2D, IDestructible
 		EquippedWeapons.Add(weapon);
 	}
 
+	public void EquipWeapon(string itemKey)
+	{
+		if (string.IsNullOrWhiteSpace(itemKey)) return;
+		var weapon = EquippedWeapons.FirstOrDefault(x => x.WeaponData.ItemKey == itemKey);
+
+		if (weapon is null) return;
+
+		EquipWeapon(weapon);
+	}
+	
 	public void EquipWeapon(Weapon weapon)
 	{
 		EquippedWeapon = weapon;

Scripts/Resources/WeaponResource.cs

@@ -34,6 +34,8 @@ public partial class WeaponResource : Resource
 	[Export] public float SpreadAngle = 0f; 
     [Export] public float RandomSpread = 0f;
 
+    [Export] public string ItemKey;
+    
     #region Bullet spawn data
 
     [Export] public string AmmoKey;

Scripts/UI/ItemsMenu.cs

@@ -43,6 +43,8 @@ public partial class ItemsMenu : ItemList
     {
         var item = _itemsDic[index];
         GD.Print("Item: " + item);
+
+        _inventoryManager.UseItem(item);
         
         HideInventory();
     }
@@ -57,9 +59,10 @@ public partial class ItemsMenu : ItemList
     public void ShowInventory()
     {
         this.Show();
-        foreach (var itm in _inventoryManager.Items)
+        foreach (var item in _inventoryManager.Items)
         {
-            var item = itm.Value;
+            if (item.Count <= 0) continue;
+            
             var index = this.AddItem($"{item.Item.ItemName} x{item.Count}", item.Item.InventorySprite,
                 item.Item.Selectable);