Format#

using System;
using System.Collections.Generic;
using System.Text;
using UnityEngine;
using VisualScript.Icons;

namespace VisualScript.Runtime
{
    [Get]

    [Title("Format")]
    [Category("Operations/Composing/Format")]

    [Description("Replaces every '{0}', '{1}', ... placeholder of a template with the values below")]
    [Image(typeof(IconString), ColorTheme.Type.Yellow, typeof(BadgeBraces))]

    [Parameter("Template", "The text with the numbered placeholders to replace")]
    [Parameter("Values", "The list of values that replace each indexed placeholder")]

    [Keywords("Template", "Interpolate", "Placeholder", "Compose", "Replace", "Text")]

    [Serializable]
    public class TypeStringFormat : TypeString
    {
        [SerializeField] private GetString m_Template = new GetString("{0}");
        [SerializeField] private List<GetString> m_Values = new List<GetString>();

        [NonSerialized] private readonly StringBuilder m_Builder = new StringBuilder();

        public override string Get(Args args)
        {
            string template = this.m_Template.Get(args);
            if (string.IsNullOrEmpty(template)) return string.Empty;

            this.m_Builder.Clear();
            this.m_Builder.Append(template);

            for (int i = 0; i < this.m_Values.Count; ++i)
            {
                GetString value = this.m_Values[i];
                this.m_Builder.Replace($"{{{i}}}", value?.Get(args) ?? string.Empty);
            }

            return this.m_Builder.ToString();
        }

        public override string ToString()
        {
            return $"Format {this.m_Template}";
        }

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