Rust Plugin - NO BP Frags needed for Lvl2/3 Benches

using System.Collections.Generic;
using Oxide.Core;
using UnityEngine;

namespace Oxide.Plugins
{
    [Info("NoBPFrags", "Gattaca", "1.2.1")]
    [Description("Removal of Blueprint Fragments from Workbenches.")]
    public class NoBPFrags : RustPlugin
    {

        private readonly List<string> _ingredientsToRemove = new List<string>
        {
            "basicblueprintfragment",
            "advancedblueprintfragment"
        };

        private readonly List<string> _targetItems = new List<string>
        {
            "workbench2",
            "workbench3"
        };

        #region Oxide Hooks

        private void OnServerInitialized()
        {
            // Delay
            timer.Once(5f, () =>
            {
                ModifyWorkbenchBlueprints();
            });
        }

        private void Unload()
        {
            Puts("NoBPFrags unloaded.");
        }

        #endregion

        #region Core Logic

        private void ModifyWorkbenchBlueprints()
        {
            foreach (var targetItemName in _targetItems)
            {
                var definition = ItemManager.FindItemDefinition(targetItemName);

                // checks
                if (definition == null) continue;
                if (definition.Blueprint == null) continue;
                if (definition.Blueprint.ingredients == null) continue;

                var ingredientsToRemove = new List<ItemAmount>();

                // Find the frags
                foreach (var ingredient in definition.Blueprint.ingredients)
                {
                    if (ingredient == null) continue;

                    if (ingredient.itemDef != null && _ingredientsToRemove.Contains(ingredient.itemDef.shortname))
                    {
                        ingredientsToRemove.Add(ingredient);
                    }
                }

                // Destroy them
                if (ingredientsToRemove.Count > 0)
                {
                    foreach (var item in ingredientsToRemove)
                    {
                        definition.Blueprint.ingredients.Remove(item);
                        Puts($"[NoBPFrags] Removed '{item.itemDef.shortname}' from '{targetItemName}'.");
                    }
                }
            }
        }

        #endregion
    }
}