Plane.FormationCreator/Plane.FormationCreator/AppConfig.cs

using Plane.FormationCreator.Formation;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Plane.FormationCreator
{
    class AppConfig
    {
        public AppConfig(MapManager mapMannager)
        {
            _mapManager = mapMannager;

            _dirPath = Path.Combine(
                Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
                "Plane",
                AppDomain.CurrentDomain.FriendlyName,
                "Config"
            );
            _filePath = Path.Combine(
                _dirPath,
                "Config.json"
            );

            string json;
            try
            {
                json = File.ReadAllText(_filePath);
            }
            catch
            {
                json = "{}";
            }
            _config = JsonConvert.DeserializeObject(json);

            App.Current.Exit += (sender, e) =>
            {
                this.Center = _mapManager.Center;
                this.ZoomLevel = _mapManager.MapView.map.ZoomLevel;
                this.Save();
            };
        }

        string _dirPath;
        string _filePath;

        dynamic _config;

        MapManager _mapManager;

        public LatLng Center
        {
            get
            {
                try
                {
                    var text = (string)_config.Center;
                    var fields = text.Split(',');
                    return new LatLng(double.Parse(fields[0]), double.Parse(fields[1]));
                }
                catch
                {
                    return new LatLng(40.160491667, 116.23426389);
                }
            }
            set
            {
                if (_config!=null)
                _config.Center = $"{value.Lat},{value.Lng}";
            }
        }

        public double ZoomLevel
        {
            get
            {
                try
                {
                    var text = (string)_config.ZoomLevel;
                    return double.Parse(text);
                }
                catch
                {
                    return 19;
                }
            }
            set
            {
                if (_config != null)
                    _config.ZoomLevel = value;
            }
        }

        public void Save()
        {
            if (!Directory.Exists(_dirPath))
            {
                Directory.CreateDirectory(_dirPath);
            }
            if (_config != null)
                File.WriteAllText(_filePath, JsonConvert.SerializeObject(_config));
        }
    }
}