Babushka/scripts/CSharp/Common/Quest/QuestMessagePopup.cs

using Godot;
using System;
using System.Net.Mime;
using Babushka.scripts.CSharp.Common.Quest;

public partial class QuestMessagePopup : Control
{
    private Label Text => GetNode<Label>("Text");

    private QuestResource? _currentlyShown;

    private Tween? _activeTween = null;

    [Export]
    private Vector2 _showPosition;

    [Export]
    private Vector2 _hidePosition;

    public override void _EnterTree()
    {
        QuestManager.Instance!.QuestsChanged += NewActiveQuest;
        NewActiveQuest();
    }

    public override void _ExitTree()
    {
        QuestManager.Instance!.QuestsChanged -= NewActiveQuest;
    }

    private void NewActiveQuest()
    {
        var shownQuest = QuestManager.Instance!.GetFollowQuest();
        if (_currentlyShown == shownQuest)
            return;

        if (_activeTween != null)
        {
            _activeTween.Kill();
        }

        if (shownQuest == null)
        {
            HideAnimate();
            _currentlyShown = null;
            return;
        }

        if (_currentlyShown == null)
        {
            Text.Text = shownQuest.title;
            ShowAnimate();
            _currentlyShown = shownQuest;
            return;
        }

        // else (_currentlyShown != null)

        _currentlyShown = shownQuest;
        HideAnimate(() =>
        {
            Text.Text = shownQuest.title;
            ShowAnimate();
        });
    }

    private void HideAnimate(Action? then = null)
    {
        _activeTween = GetTree().CreateTween();
        _activeTween.TweenProperty(this, "position", _hidePosition, 0.4)
            .SetTrans(Tween.TransitionType.Cubic)
            .SetEase(Tween.EaseType.Out);
        if (then != null)
            _activeTween.Finished += then;
    }

    private void ShowAnimate(Action? then = null)
    {
        _activeTween = GetTree().CreateTween();
        _activeTween.TweenProperty(this, "position", _showPosition, 0.4)
            .SetTrans(Tween.TransitionType.Cubic)
            .SetEase(Tween.EaseType.Out);
        if (then != null)
            _activeTween.Finished += then;
    }
}