gather-and-defend/Assets/Scripts/LevelEditor/TilemapData.cs

using System.Collections.Generic;
using UnityEngine.Tilemaps;
using UnityEngine;
using System;
using System.Collections;

namespace GatherAndDefend.LevelEditor
{
    [Serializable]
    public class TilemapData : IEnumerable<TileData>
    {
        public const int INVISIBLE_LAYER = 6;
        [SerializeField]
        private string _key;
        [SerializeField]
        private List<TileData> _tiles;
        [SerializeField]
        private bool _isInvisible;
        [SerializeField]
        private bool _isCollidable;
        [SerializeField]
        private bool _isTrigger;
        [SerializeField]
        private int _renderOrder;
        [SerializeField]
        private string _renderLayer;


        public string Key => _key;

        public void LoadToTilemap(Tilemap reference)
        {
            var rend = reference.GetComponent<TilemapRenderer>();
            rend.sortingOrder = _renderOrder;
            rend.sortingLayerName = _renderLayer;
            if (_isInvisible) rend.gameObject.layer = INVISIBLE_LAYER;
            if (_isCollidable)
            {
                var collision = rend.gameObject.AddComponent<TilemapCollider2D>();
                collision.isTrigger = _isTrigger;
            }


            foreach (TileData data in _tiles)
            {
                reference.SetTile(data.Position, data.Tile);
            }
        }
        public void SaveFromTilemap(Tilemap reference)
        {
            _key = reference.name;
            if (_isCollidable = reference.GetComponent<TilemapCollider2D>())
            {
                _isTrigger = reference.GetComponent<TilemapCollider2D>().isTrigger;
            }
            
            _isInvisible = reference.gameObject.layer == INVISIBLE_LAYER;
            _renderLayer = reference.GetComponent<TilemapRenderer>().sortingLayerName;
            _renderOrder = reference.GetComponent<TilemapRenderer>().sortingOrder;


            _tiles = new List<TileData>();
            
            BoundsInt bounds = reference.cellBounds;
            for (int i = bounds.xMin; i <= bounds.xMax; i++)
            {
                for (int j = bounds.yMin; j <= bounds.yMax; j++)
                {
                    Vector3Int position = new Vector3Int(i, j);
                    TileBase tile = reference.GetTile(position);
                    if (!tile) continue;
                    var tileData = new TileData(position, tile);
                    _tiles.Add(tileData);
                }
            }
        }

        public IEnumerator<TileData> GetEnumerator()
        {
            return _tiles.GetEnumerator();
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            return _tiles.GetEnumerator();
        }

        public TilemapData()
        {
            _tiles = new List<TileData>();
        }
    }
}