Continue working on main menu screen and refactor

New method for storing information on report data; rework and migrate settings to version 2; Add new options to ConfirmViewModel; rework some class hierarchy (may change more later)

src/MayShow.Shared/Models/PDFReportInfo.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Text;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.Threading.Tasks;
+using MayShow.Helpers;
+using MayShows.Helpers;
+
+namespace MayShow.Models;
+
+class PDFReportInfo : ChangeNotifier
+{
+    private string? _baseFolder; // might be null
+    private string _uuid;
+    private string _title;
+    private DateTime? _lastSaved;
+
+    public PDFReportInfo() : base()
+    {
+        _baseFolder = null;
+        _uuid = Guid.NewGuid().ToString();
+        _title = "";
+        _lastSaved = null;
+    }
+
+    public string? BaseFolder
+    {
+        get => _baseFolder;
+        set { _baseFolder = value; NotifyPropertyChanged(); }
+    }
+
+    public string UUID
+    {
+        get => _uuid;
+        set { _uuid = value; NotifyPropertyChanged(); }
+    }
+
+    public string Title
+    {
+        get => _title;
+        set { _title = value; NotifyPropertyChanged(); }
+    }
+
+    public DateTime? LastSaved
+    {
+        get => _lastSaved;
+        set { _lastSaved = value; NotifyPropertyChanged(); }
+    }
+
+    public void ResetUUID()
+    {
+        UUID = Guid.NewGuid().ToString();
+    }
+    
+    public void DeleteInternalFolderFromDisk()
+    {
+        var path = Path.Combine(Utilities.GetInternalDataPath(), UUID);
+        if (Directory.Exists(path) && path != Utilities.GetInternalDataPath())
+        {
+            Directory.Delete(path, true);
+        }
+    }
+}