Godot.Sharp.Extended/Core/Tools/NodeExtensions.cs

using Godot.Collections;

namespace Godot.Sharp.Extended.Tools;

public static class NodeExtensions
{
    public static void AddToGroup(this Node node) => node.AddToGroup(node.GetType().Name);
    public static T GetNode<T>(this Node node) where T : Node => node.GetNode<T>(typeof(T).Name);
    public static Array<T> GetChildrenOfType<T>(this Node node) where T : Node
    {
        var children = node.GetChildren();

        return new Array<T>(children.OfType<T>().ToArray());
    }
    public static T? GetFirstChildOfType<T>(this Node node) where T : Node => GetChildrenOfType<T>(node).FirstOrDefault();

    public static void RemoveAllChildren(this Node node)
    {
        foreach (var child in node.GetChildren())
            node.RemoveChild(child);
    }

    public static void RemoveAndQueueFreeChildren(this Node node)
    {
        foreach (var child in node.GetChildren())
        {
            node.RemoveChild(child);
            child.QueueFree();
        }
    }

    public static void QueueFreeChildren(this Node node)
    {
        foreach (var child in node.GetChildren())
            node.QueueFree();
    }

    public static T? GetAncestor<T>(this Node node) where T : Node
    {
        Node current = node;
        Node root = node.GetTree().Root;
        while (current != root && !(current is T))
            current = current.GetParent();

        return current as T;
    }

    public static Node? GetLastChild(this Node node)
    {
        var count = node.GetChildCount();
        if (count == 0) return null;
        return node.GetChild(count - 1);
    }
    
    public static T? GetLastChild<T>(this Node node) where T : Node
    {
        Node? last = null;
        foreach (var child in node.GetChildren())
        {
            if (child is T) last = child;
        }

        return last as T;
    }
}