Join Collection#

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

namespace VisualScript.Runtime
{
    [Get]

    [Title("Join Collection")]
    [Category("Operations/Composing/Join Collection")]

    [Description("Converts every item of a collection to text and joins them using a separator")]
    [Image(typeof(IconString), ColorTheme.Type.Yellow, typeof(BadgeList))]

    [Parameter("Collection", "The collection whose items are converted to text")]
    [Parameter("Separator", "The text placed between each pair of items")]

    [Keywords("Implode", "List", "Array", "Concatenate", "Merge", "Separator", "Comma")]

    [Serializable]
    public class TypeStringJoin : TypeString
    {
        [SerializeField] private GetCollection m_Collection = new GetCollection();
        [SerializeField] private GetString m_Separator = new GetString(", ");

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

        public override string Get(Args args)
        {
            using Args scoped = Args.Get(args);

            int count = this.m_Collection.Capture(scoped);
            if (count == 0) return string.Empty;

            string separator = this.m_Separator.Get(args) ?? string.Empty;

            this.m_Builder.Clear();
            for (int i = 0; i < count; ++i)
            {
                if (i > 0) this.m_Builder.Append(separator);

                if (ArgsCollectionParameters.TryGetItem(this.m_Collection, scoped, i, out string item))
                {
                    this.m_Builder.Append(item);
                }
            }

            return this.m_Builder.ToString();
        }

        public override string ToString()
        {
            return $"Join {this.m_Collection}";
        }

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