Babushka/scripts/CSharp/Common/Savegame/SaveIDProviderTool.cs

using System;
using Godot;
using Godot.Collections;

namespace Babushka.scripts.CSharp.Common.Savegame;

/// <summary>
/// And editor tool that lives in the scene scope and iterates over saveable nodes and assigns them unique IDs where necessary.
/// It only works if the object (prefab) in question has been added to the "Saveable"-group beforehand.
/// </summary>
[Tool]
public partial class SaveIDProviderTool : Node
{
    /// <summary>
    /// Creates an inspector button that calls the AssignIDs method.
    /// </summary>
    [ExportToolButton("Assign IDs")] private Callable assignIDs => Callable.From(AssignIDs);

    private void AssignIDs()
    {
        Array<Node> saveables = GetTree().GetNodesInGroup("Saveable");
        foreach (var node in saveables)
        {
            GD.Print($"Checking {node.Name}.");
            if (!node.HasMeta("SaveID") || string.IsNullOrEmpty(node.GetMeta("SaveID").AsString()))
            {
                string saveID = Guid.NewGuid().ToString();
                node.SetMeta("SaveID", saveID);
                GD.Print($"Setting Save ID for node {node.Name}: " + saveID);
            }
            
        }
    }
}