[GUI] Cleanup ExportSetupViewModel & RootViewModel

DiscordChatExporter.Gui/ViewModels/Dialogs/ExportSetupViewModel.cs

@@ -4,6 +4,7 @@ using System.Linq;
 using DiscordChatExporter.Core.Discord;
 using DiscordChatExporter.Core.Discord.Data;
 using DiscordChatExporter.Core.Exporting;
+using DiscordChatExporter.Core.Exporting.Partitioning;
 using DiscordChatExporter.Core.Utils.Extensions;
 using DiscordChatExporter.Gui.Services;
 using DiscordChatExporter.Gui.ViewModels.Framework;
@@ -48,6 +49,10 @@ namespace DiscordChatExporter.Gui.ViewModels.Dialogs
 
         public string? PartitionLimitValue { get; set; }
 
+        public PartitionLimit PartitionLimit => !string.IsNullOrWhiteSpace(PartitionLimitValue)
+            ? PartitionLimit.Parse(PartitionLimitValue)
+            : NullPartitionLimit.Instance;
+
         public bool ShouldDownloadMedia { get; set; }
 
         // Whether to show the "advanced options" by default when the dialog opens.

DiscordChatExporter.Gui/ViewModels/RootViewModel.cs

@@ -7,7 +7,6 @@ using DiscordChatExporter.Core.Discord;
 using DiscordChatExporter.Core.Discord.Data;
 using DiscordChatExporter.Core.Exceptions;
 using DiscordChatExporter.Core.Exporting;
-using DiscordChatExporter.Core.Exporting.Partitioning;
 using DiscordChatExporter.Core.Utils.Extensions;
 using DiscordChatExporter.Gui.Services;
 using DiscordChatExporter.Gui.Utils;
@@ -205,10 +204,6 @@ namespace DiscordChatExporter.Gui.ViewModels
 
                 try
                 {
-                    var partitionLimit = !string.IsNullOrWhiteSpace(dialog.PartitionLimitValue)
-                        ? PartitionLimit.Parse(dialog.PartitionLimitValue)
-                        : NullPartitionLimit.Instance;
-
                     var request = new ExportRequest(
                         dialog.Guild!,
                         channel!,
@@ -216,7 +211,7 @@ namespace DiscordChatExporter.Gui.ViewModels
                         dialog.SelectedFormat,
                         dialog.After?.Pipe(Snowflake.FromDate),
                         dialog.Before?.Pipe(Snowflake.FromDate),
-                        partitionLimit,
+                        dialog.PartitionLimit,
                         dialog.ShouldDownloadMedia,
                         _settingsService.ShouldReuseMedia,
                         _settingsService.DateFormat