Character At#

using System;
using UnityEngine;
using VisualScript.Icons;

namespace VisualScript.Runtime
{
    [Get]

    [Title("Character At")]
    [Category("Operations/Extract/Character At")]

    [Description("Returns the single character found at the specified index. Empty if out of range")]
    [Image(typeof(IconString), ColorTheme.Type.Yellow, typeof(BadgeString))]

    [Parameter("Text", "The text to read the character from")]
    [Parameter("Index", "The zero based index of the character")]

    [Keywords("Letter", "Index", "Position", "Char", "Text")]

    [Serializable]
    public class TypeStringCharacterAt : TypeString
    {
        [SerializeField] private GetString m_Text = new GetString();
        [SerializeField] private GetInteger m_Index = new GetInteger(0);

        public override string GetPreview(GameObject source) => CharacterAt(
            this.m_Text.GetPreview(source),
            (int) this.m_Index.GetPreview(source)
        );

        public override string Get(Args args) => CharacterAt(
            this.m_Text.Get(args),
            this.m_Index.GetInt(args)
        );

        private static string CharacterAt(string text, int index)
        {
            if (string.IsNullOrEmpty(text)) return string.Empty;
            if (index < 0 || index >= text.Length) return string.Empty;

            return text[index].ToString();
        }

        public override string ToString()
        {
            return $"{this.m_Text}[{this.m_Index}]";
        }

        protected override SubscriptionMode Subscription => SubscriptionMode.OnChange;
    }
}