Split output file into multiple partitions (#116)

DiscordChatExporter.Gui/Messages/StartExportMessage.cs

@@ -15,14 +15,17 @@ namespace DiscordChatExporter.Gui.Messages
 
         public DateTime? To { get; }
 
+        public int? PartitionLimit { get; }
+
         public StartExportMessage(Channel channel, string filePath, ExportFormat format,
-            DateTime? from, DateTime? to)
+            DateTime? from, DateTime? to, int? partitionLimit)
         {
             Channel = channel;
             FilePath = filePath;
             Format = format;
             From = from;
             To = to;
+            PartitionLimit = partitionLimit;
         }
     }
 }

DiscordChatExporter.Gui/ViewModels/ExportSetupViewModel.cs

@@ -19,6 +19,7 @@ namespace DiscordChatExporter.Gui.ViewModels
         private ExportFormat _format;
         private DateTime? _from;
         private DateTime? _to;
+        private int? _partitionLimit;
 
         public Guild Guild { get; private set; }
 
@@ -63,6 +64,12 @@ namespace DiscordChatExporter.Gui.ViewModels
             set => Set(ref _to, value);
         }
 
+        public int? PartitionLimit
+        {
+            get => _partitionLimit;
+            set => Set(ref _partitionLimit, value);
+        }
+
         // Commands
         public RelayCommand ExportCommand { get; }
 
@@ -83,13 +90,15 @@ namespace DiscordChatExporter.Gui.ViewModels
                     .Replace(Path.GetInvalidFileNameChars(), '_');
                 From = null;
                 To = null;
+                PartitionLimit = _settingsService.LastPartitionLimit;
             });
         }
 
         private void Export()
         {
-            // Save format
+            // Persist preferences
             _settingsService.LastExportFormat = SelectedFormat;
+            _settingsService.LastPartitionLimit = PartitionLimit;
 
             // Clamp 'from' and 'to' values
             if (From > To)
@@ -98,7 +107,7 @@ namespace DiscordChatExporter.Gui.ViewModels
                 To = From;
 
             // Start export
-            MessengerInstance.Send(new StartExportMessage(Channel, FilePath, SelectedFormat, From, To));
+            MessengerInstance.Send(new StartExportMessage(Channel, FilePath, SelectedFormat, From, To, PartitionLimit));
         }
     }
 }

DiscordChatExporter.Gui/ViewModels/IExportSetupViewModel.cs

@@ -14,6 +14,7 @@ namespace DiscordChatExporter.Gui.ViewModels
         ExportFormat SelectedFormat { get; set; }
         DateTime? From { get; set; }
         DateTime? To { get; set; }
+        int? PartitionLimit { get; set; }
 
         RelayCommand ExportCommand { get; }
     }

DiscordChatExporter.Gui/ViewModels/MainViewModel.cs

@@ -129,7 +129,7 @@ namespace DiscordChatExporter.Gui.ViewModels
 
             // Messages
             MessengerInstance.Register<StartExportMessage>(this,
-                m => Export(m.Channel, m.FilePath, m.Format, m.From, m.To));
+                m => Export(m.Channel, m.FilePath, m.Format, m.From, m.To, m.PartitionLimit));
         }
 
         private async void ViewLoaded()
@@ -239,7 +239,8 @@ namespace DiscordChatExporter.Gui.ViewModels
             MessengerInstance.Send(new ShowExportSetupMessage(SelectedGuild, channel));
         }
 
-        private async void Export(Channel channel, string filePath, ExportFormat format, DateTime? from, DateTime? to)
+        private async void Export(Channel channel, string filePath, ExportFormat format, 
+            DateTime? from, DateTime? to, int? partitionLimit)
         {
             IsBusy = true;
 
@@ -258,7 +259,7 @@ namespace DiscordChatExporter.Gui.ViewModels
                 var chatLog = await _dataService.GetChatLogAsync(token, guild, channel, from, to, progressHandler);
 
                 // Export
-                _exportService.ExportChatLog(chatLog, filePath, format);
+                _exportService.ExportChatLog(chatLog, filePath, format, partitionLimit);
 
                 // Notify completion
                 MessengerInstance.Send(new ShowNotificationMessage("Export complete"));

DiscordChatExporter.Gui/Views/ExportSetupDialog.xaml

@@ -55,6 +55,13 @@
                 SelectedDate="{Binding To}" />
         </Grid>
 
+        <!--  Partitioning  -->
+        <TextBox
+            Margin="16,8,16,8"
+            materialDesign:HintAssist.Hint="Messages per partition (optional)"
+            materialDesign:HintAssist.IsFloating="True"
+            Text="{Binding PartitionLimit}" />
+
         <!--  Buttons  -->
         <StackPanel HorizontalAlignment="Right" Orientation="Horizontal">
             <Button