unity playable text countup

CountUpTextTimeControl.cs

using System;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.Timeline;
using UnityEngine.UI;
using DG.Tweening;

class BaseTimeControl : MonoBehaviour, ITimeControl
{
    Sequence sequence = default;
    public void OnControlTimeStart() { }
    public void OnControlTimeStop() { }
    public void SetTime(double time)
    {
        sequence?.Goto((float)time);
    }

    protected void InitSequence(Tween tween)
    {
        if (sequence != null)
        {
            sequence.Goto(0);
            sequence.Kill();
        }
        sequence = DOTween.Sequence();
        sequence.Append(tween);
    }

}

class CountUpTextTimeControl : BaseTimeControl
{
    class CountUp
    {
        public Func<int, string> formatFunc = default;
        Text text = default;
        int current = default;
        int end = default;

        public CountUp(Text text, int count)
        {
            this.text = text;
            this.current = 0;
            this.end = count;
        }

        public Tween Tween(float duration, Ease ease)
        {
            return DOTween.To(
            () => current,
            (n) =>
            {
                current = n;
                text.text = formatFunc?.Invoke(current) ?? current.ToString();
            },
            end,
            duration
            ).SetEase(ease).SetAutoKill(true);
        }
    }

    [SerializeField] Text text = default;
    [SerializeField] int count = 10000;
    [SerializeField] float duration = 0.7f;
    [SerializeField] Ease ease = Ease.OutQuad;

    public int Count
    {
        get;
        private set;
    }

    public Func<int, string> FormatFunc
    {
        set
        {
            if (countUp == null) return;
            countUp.formatFunc = value;
        }
    }

    CountUp countUp = default;

    public void Initialize(int count)
    {
        countUp = countUp ?? new CountUp(text, count);
        InitSequence(countUp.Tween(duration, ease));
    }

    void OnValidate()
    {
        if (Application.isEditor) Initialize(count);
    }
}