Migrate to Stylet and refactor view/view-model framework

DiscordChatExporter.Gui/ViewModels/Dialogs/ExportSetupViewModel.cs

@@ -0,0 +1,77 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using DiscordChatExporter.Core.Models;
+using DiscordChatExporter.Core.Services;
+using DiscordChatExporter.Gui.ViewModels.Framework;
+using Tyrrrz.Extensions;
+
+namespace DiscordChatExporter.Gui.ViewModels.Dialogs
+{
+    public class ExportSetupViewModel : DialogScreen
+    {
+        private readonly DialogManager _dialogManager;
+        private readonly SettingsService _settingsService;
+
+        public Guild Guild { get; set; }
+
+        public Channel Channel { get; set; }
+
+        public string FilePath { get; set; }
+
+        public IReadOnlyList<ExportFormat> AvailableFormats =>
+            Enum.GetValues(typeof(ExportFormat)).Cast<ExportFormat>().ToArray();
+
+        public ExportFormat SelectedFormat { get; set; } = ExportFormat.HtmlDark;
+
+        public DateTime? From { get; set; }
+
+        public DateTime? To { get; set; }
+
+        public int? PartitionLimit { get; set; }
+
+        public ExportSetupViewModel(DialogManager dialogManager, SettingsService settingsService)
+        {
+            _dialogManager = dialogManager;
+            _settingsService = settingsService;
+        }
+
+        protected override void OnViewLoaded()
+        {
+            base.OnViewLoaded();
+
+            // Persist preferences
+            SelectedFormat = _settingsService.LastExportFormat;
+            PartitionLimit = _settingsService.LastPartitionLimit;
+        }
+
+        public void Confirm()
+        {
+            // Persist preferences
+            _settingsService.LastExportFormat = SelectedFormat;
+            _settingsService.LastPartitionLimit = PartitionLimit;
+
+            // Clamp 'from' and 'to' values
+            if (From > To)
+                From = To;
+            if (To < From)
+                To = From;
+
+            // Generate default file name
+            var ext = SelectedFormat.GetFileExtension();
+            var defaultFileName = $"{Guild.Name} - {Channel.Name}.{ext}".Replace(Path.GetInvalidFileNameChars(), '_');
+
+            // Prompt for output file path
+            var filter = $"{ext.ToUpperInvariant()} files|*.{ext}";
+            FilePath = _dialogManager.PromptSaveFilePath(filter, defaultFileName);
+
+            // If canceled - return
+            if (FilePath.IsBlank())
+                return;
+            
+            // Close dialog
+            Close(true);
+        }
+    }
+}

DiscordChatExporter.Gui/ViewModels/Dialogs/SettingsViewModel.cs

@@ -0,0 +1,34 @@
+using DiscordChatExporter.Core.Services;
+using DiscordChatExporter.Gui.ViewModels.Framework;
+using Tyrrrz.Extensions;
+
+namespace DiscordChatExporter.Gui.ViewModels.Dialogs
+{
+    public class SettingsViewModel : DialogScreen
+    {
+        private readonly SettingsService _settingsService;
+
+        public bool IsAutoUpdateEnabled
+        {
+            get => _settingsService.IsAutoUpdateEnabled;
+            set => _settingsService.IsAutoUpdateEnabled = value;
+        }
+
+        public string DateFormat
+        {
+            get => _settingsService.DateFormat;
+            set => _settingsService.DateFormat = value;
+        }
+
+        public int MessageGroupLimit
+        {
+            get => _settingsService.MessageGroupLimit;
+            set => _settingsService.MessageGroupLimit = value.ClampMin(0);
+        }
+
+        public SettingsViewModel(SettingsService settingsService)
+        {
+            _settingsService = settingsService;
+        }
+    }
+}