Add MainMenu and Marketplace components; implement game management and skill unlocking features

scripts/UI/MarketplaceButton.cs

@@ -0,0 +1,62 @@
+using Godot;
+using Mr.BrickAdventures.Autoloads;
+using Mr.BrickAdventures.scripts.components;
+using Mr.BrickAdventures.scripts.Resources;
+
+namespace Mr.BrickAdventures.scripts.UI;
+
+public partial class MarketplaceButton : Button
+{
+    [Export] public SkillData Data { get; set; }
+    [Export] public Texture2D UnlockedSkillIcon { get; set; }
+    [Export] public Texture2D LockedSkillIcon { get; set; }
+    [Export] public Container SkillLevelContainer { get; set; }
+    
+    private GameManager _gameManager;
+    private SkillUnlockedComponent _skillUnlockedComponent;
+
+    public override void _Ready()
+    {
+        _gameManager = GetNode<GameManager>("/root/GameManager");
+        
+        Setup();
+        var player = _gameManager.Player;
+
+        var skillUnlockerComponent = player?.GetNodeOrNull<SkillUnlockedComponent>("SkillUnlockerComponent");
+        if (skillUnlockerComponent == null) return;
+        
+        skillUnlockerComponent.SkillUnlocked += OnSkillUnlock;
+    }
+
+    public override void _ExitTree()
+    {
+        _skillUnlockedComponent.SkillUnlocked -= OnSkillUnlock;
+    }
+
+    private void Setup()
+    {
+        if (Data == null) return;
+        
+        for (var i = 0; i < Data.MaxLevel; i++)
+        {
+            var icon = new TextureRect()
+            {
+                Texture = i < Data.Level ? UnlockedSkillIcon : LockedSkillIcon,
+            };
+            SkillLevelContainer.AddChild(icon);
+        }
+    }
+
+    private void OnSkillUnlock(SkillData skill)
+    {
+        if (skill.Name != Data.Name) return;
+
+        for (var i = 0; i < Data.MaxLevel; i++)
+        {
+            var icon = SkillLevelContainer.GetChildOrNull<TextureRect>(i);
+            if (icon == null) continue;
+            icon.Texture = i < Data.Level ? UnlockedSkillIcon : LockedSkillIcon;
+            Disabled = i >= Data.Level;
+        }
+    }
+}