Notes

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using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using Newtonsoft.Json;
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using ViewModel;
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namespace Model.Services
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{
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    public static class NotesSerializer
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    {
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        /// <summary>
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        /// Путь к – «Мои документы\Notes\notes.json».
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        /// </summary>
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        public static string MyDocumentsPath { get; set; } =
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            Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments)
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            + @"\Notes\notes.json";
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        public static void Serialize(List<NoteDTO>? notes)
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        {
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            if (!Directory.Exists(Path.GetDirectoryName(MyDocumentsPath)))
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                Directory.CreateDirectory(Path.GetDirectoryName(MyDocumentsPath));
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            using (StreamWriter writer = new StreamWriter(MyDocumentsPath))
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            {
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                writer.Write(JsonConvert.SerializeObject(notes));
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            }
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        }
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        public static ObservableCollection<NoteViewModel>? Deserialize()
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        {
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            if (!Directory.Exists(Path.GetDirectoryName(MyDocumentsPath)))
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                Directory.CreateDirectory(Path.GetDirectoryName(MyDocumentsPath));
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            ObservableCollection<NoteViewModel>? contacts = 
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                new ObservableCollection<NoteViewModel>();
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            try
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            {
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                using (StreamReader reader = new StreamReader(MyDocumentsPath))
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                {
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                    contacts = JsonConvert.
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                        DeserializeObject<ObservableCollection<NoteViewModel>>(reader.ReadToEnd());
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                }
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                if (contacts == null) contacts = new ObservableCollection<NoteViewModel>();
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            }
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            catch (FileNotFoundException e)
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            {
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                return contacts;
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            }
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            return contacts;
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        }
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    }
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}
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