Add exporting DAT files.

RomRepoMgr.Core/Workers/Compression.cs

@@ -83,6 +83,19 @@ namespace RomRepoMgr.Core.Workers
             outFs.Dispose();
         }
 
+        public void DecompressFile(string source, string destination)
+        {
+            var    inFs    = new FileStream(source, FileMode.Open, FileAccess.Read);
+            var    outFs   = new FileStream(destination, FileMode.Create, FileAccess.Write);
+            Stream zStream = new LZipStream(inFs, CompressionMode.Decompress);
+
+            zStream.CopyTo(outFs);
+
+            outFs.Close();
+            zStream.Close();
+            inFs.Close();
+        }
+
         public bool CheckUnar(string unArPath)
         {
             if(string.IsNullOrWhiteSpace(unArPath))

RomRepoMgr/ViewModels/ExportDatViewModel.cs

@@ -0,0 +1,162 @@
+/******************************************************************************
+// RomRepoMgr - ROM repository manager
+// ----------------------------------------------------------------------------
+//
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This program is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General Public License as
+//     published by the Free Software Foundation, either version 3 of the
+//     License, or (at your option) any later version.
+//
+//     This program is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General Public License for more details.
+//
+//     You should have received a copy of the GNU General Public License
+//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2020 Natalia Portillo
+*******************************************************************************/
+
+using System.IO;
+using System.Reactive;
+using System.Threading.Tasks;
+using Avalonia.Threading;
+using JetBrains.Annotations;
+using ReactiveUI;
+using RomRepoMgr.Core;
+using RomRepoMgr.Core.EventArgs;
+using RomRepoMgr.Core.Workers;
+using RomRepoMgr.Views;
+using ErrorEventArgs = RomRepoMgr.Core.EventArgs.ErrorEventArgs;
+
+namespace RomRepoMgr.ViewModels
+{
+    public sealed class ExportDatViewModel : ViewModelBase
+    {
+        readonly string      _datHash;
+        readonly string      _outPath;
+        readonly ExportDat   _view;
+        readonly Compression _worker;
+        bool                 _canClose;
+        string               _errorMessage;
+        bool                 _errorVisible;
+        bool                 _progressVisible;
+        string               _statusMessage;
+
+        public ExportDatViewModel(ExportDat view, string datHash, string outPath)
+        {
+            _view                    =  view;
+            _datHash                 =  datHash;
+            _outPath                 =  outPath;
+            CloseCommand             =  ReactiveCommand.Create(ExecuteCloseCommand);
+            ProgressVisible          =  false;
+            ErrorVisible             =  false;
+            _worker                  =  new Compression();
+            _worker.FinishedWithText += OnWorkerOnFinishedWithText;
+            _worker.FailedWithText   += OnWorkerOnFailedWithText;
+        }
+
+        [NotNull]
+        public string Title => "Exporting DAT file...";
+
+        public string StatusMessage
+        {
+            get => _statusMessage;
+            set => this.RaiseAndSetIfChanged(ref _statusMessage, value);
+        }
+
+        public bool ProgressVisible
+        {
+            get => _progressVisible;
+            set => this.RaiseAndSetIfChanged(ref _progressVisible, value);
+        }
+
+        public bool ErrorVisible
+        {
+            get => _errorVisible;
+            set => this.RaiseAndSetIfChanged(ref _errorVisible, value);
+        }
+
+        public string ErrorMessage
+        {
+            get => _errorMessage;
+            set => this.RaiseAndSetIfChanged(ref _errorMessage, value);
+        }
+
+        public bool CanClose
+        {
+            get => _canClose;
+            set => this.RaiseAndSetIfChanged(ref _canClose, value);
+        }
+
+        public string                      CloseLabel   => "Close";
+        public ReactiveCommand<Unit, Unit> CloseCommand { get; }
+
+        void OnWorkerOnFinishedWithText(object sender, MessageEventArgs args) => Dispatcher.UIThread.Post(() =>
+        {
+            StatusMessage   = "Finished";
+            ProgressVisible = false;
+            CanClose        = true;
+        });
+
+        void OnWorkerOnFailedWithText(object sender, ErrorEventArgs args) => Dispatcher.UIThread.Post(() =>
+        {
+            ErrorMessage    = args.Message;
+            ProgressVisible = false;
+            ErrorVisible    = true;
+            CanClose        = true;
+        });
+
+        void ExecuteCloseCommand() => _view.Close();
+
+        internal void OnOpened()
+        {
+            ProgressVisible = true;
+            StatusMessage   = "Decompressing DAT file...";
+
+            byte[] sha384Bytes = new byte[48];
+            string sha384      = _datHash;
+
+            for(int i = 0; i < 48; i++)
+            {
+                if(sha384[i * 2] >= 0x30 &&
+                   sha384[i * 2] <= 0x39)
+                    sha384Bytes[i] = (byte)((sha384[i * 2] - 0x30) * 0x10);
+                else if(sha384[i * 2] >= 0x41 &&
+                        sha384[i * 2] <= 0x46)
+                    sha384Bytes[i] = (byte)((sha384[i * 2] - 0x37) * 0x10);
+                else if(sha384[i * 2] >= 0x61 &&
+                        sha384[i * 2] <= 0x66)
+                    sha384Bytes[i] = (byte)((sha384[i * 2] - 0x57) * 0x10);
+
+                if(sha384[(i * 2) + 1] >= 0x30 &&
+                   sha384[(i * 2) + 1] <= 0x39)
+                    sha384Bytes[i] += (byte)(sha384[(i * 2) + 1] - 0x30);
+                else if(sha384[(i * 2) + 1] >= 0x41 &&
+                        sha384[(i * 2) + 1] <= 0x46)
+                    sha384Bytes[i] += (byte)(sha384[(i * 2) + 1] - 0x37);
+                else if(sha384[(i * 2) + 1] >= 0x61 &&
+                        sha384[(i * 2) + 1] <= 0x66)
+                    sha384Bytes[i] += (byte)(sha384[(i * 2) + 1] - 0x57);
+            }
+
+            string datHash32         = Base32.ToBase32String(sha384Bytes);
+            string datFilesPath      = Path.Combine(Settings.Settings.Current.RepositoryPath, "datfiles");
+            string compressedDatPath = Path.Combine(datFilesPath, datHash32 + ".lz");
+
+            if(!File.Exists(compressedDatPath))
+                _view.Close();
+
+            Task.Run(() =>
+            {
+                _worker.DecompressFile(compressedDatPath, _outPath);
+            });
+        }
+    }
+}

RomRepoMgr/ViewModels/MainWindowViewModel.cs

@@ -57,6 +57,7 @@ namespace RomRepoMgr.ViewModels
             ImportRomFolderCommand = ReactiveCommand.Create(ExecuteImportRomFolderCommand);
             DeleteRomSetCommand    = ReactiveCommand.Create(ExecuteDeleteRomSetCommand);
             EditRomSetCommand      = ReactiveCommand.Create(ExecuteEditRomSetCommand);
+            ExportDatCommand       = ReactiveCommand.Create(ExecuteExportDatCommand);
             RomSets                = new ObservableCollection<RomSetModel>(romSets);
         }
 
@@ -75,7 +76,6 @@ namespace RomRepoMgr.ViewModels
         public string                            RomSetHaveRomsLabel           => "Have";
         public string                            RomSetMissRomsLabel           => "Miss";
 
-        public string Greeting => "Hello World!";
         public bool NativeMenuSupported =>
             NativeMenu.GetIsNativeMenuExported((Application.Current.ApplicationLifetime as
                                                     IClassicDesktopStyleApplicationLifetime)?.MainWindow);
@@ -88,6 +88,7 @@ namespace RomRepoMgr.ViewModels
         public ReactiveCommand<Unit, Unit> ImportRomFolderCommand { get; }
         public ReactiveCommand<Unit, Unit> DeleteRomSetCommand    { get; }
         public ReactiveCommand<Unit, Unit> EditRomSetCommand      { get; }
+        public ReactiveCommand<Unit, Unit> ExportDatCommand       { get; }
 
         public RomSetModel SelectedRomSet
         {
@@ -219,6 +220,9 @@ namespace RomRepoMgr.ViewModels
 
         void ExecuteEditRomSetCommand()
         {
+            if(SelectedRomSet == null)
+                return;
+
             var window    = new EditDat();
             var viewModel = new EditDatViewModel(window, SelectedRomSet);
 
@@ -237,5 +241,26 @@ namespace RomRepoMgr.ViewModels
 
             window.Show();
         }
+
+        async void ExecuteExportDatCommand()
+        {
+            if(SelectedRomSet == null)
+                return;
+
+            var dlgSave = new SaveFileDialog
+            {
+                InitialFileName = SelectedRomSet.Filename
+            };
+
+            string result = await dlgSave.ShowAsync(_view);
+
+            if(result == null)
+                return;
+
+            var dialog    = new ExportDat();
+            var viewModel = new ExportDatViewModel(dialog, SelectedRomSet.Sha384, result);
+            dialog.DataContext = viewModel;
+            await dialog.ShowDialog(_view);
+        }
     }
 }

RomRepoMgr/Views/ExportDat.xaml

@@ -0,0 +1,53 @@
+<!--
+// /***************************************************************************
+// RomRepoMgr - ROM repository manager
+// ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐
+//
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// ‐‐[ License ] ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐
+//
+//     This program is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General public License as
+//     published by the Free Software Foundation, either version 3 of the
+//     License, or (at your option) any later version.
+//
+//     This program is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General public License for more details.
+//
+//     You should have received a copy of the GNU General public License
+//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐
+// Copyright © 2020 Natalia Portillo
+// ****************************************************************************/
+-->
+<Window xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:vm="clr-namespace:RomRepoMgr.ViewModels;assembly=RomRepoMgr" mc:Ignorable="d" d:DesignWidth="800"
+        d:DesignHeight="450" Width="480" Height="90" x:Class="RomRepoMgr.Views.ExportDat"
+        Icon="/Assets/avalonia-logo.ico" CanResize="False" Title="{Binding Title}" WindowStartupLocation="CenterOwner">
+    <Design.DataContext>
+        <vm:ExportDatViewModel />
+    </Design.DataContext>
+    <Border Padding="15">
+        <Grid>
+            <Grid.RowDefinitions>
+                <RowDefinition Height="Auto" /> <RowDefinition Height="auto" /> <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+            </Grid.RowDefinitions>
+            <TextBlock Grid.Row="0" Text="{Binding StatusMessage}" HorizontalAlignment="Center" />
+            <ProgressBar Grid.Row="1" IsIndeterminate="True" HorizontalAlignment="Stretch"
+                         IsVisible="{Binding ProgressVisible}" />
+            <TextBlock Grid.Row="2" Text="{Binding ErrorMessage}" HorizontalAlignment="Center" Foreground="Red"
+                       IsVisible="{Binding ErrorVisible}" />
+            <Button Grid.Row="3" HorizontalAlignment="Right" VerticalAlignment="Center" IsEnabled="{Binding CanClose}"
+                    Command="{Binding CloseCommand}">
+                <TextBlock Text="{Binding CloseLabel}" />
+            </Button>
+        </Grid>
+    </Border>
+</Window>

RomRepoMgr/Views/ExportDat.xaml.cs

@@ -0,0 +1,45 @@
+/******************************************************************************
+// RomRepoMgr - ROM repository manager
+// ----------------------------------------------------------------------------
+//
+// Author(s)      : Natalia Portillo <claunia@claunia.com>
+//
+// --[ License ] --------------------------------------------------------------
+//
+//     This program is free software: you can redistribute it and/or modify
+//     it under the terms of the GNU General Public License as
+//     published by the Free Software Foundation, either version 3 of the
+//     License, or (at your option) any later version.
+//
+//     This program is distributed in the hope that it will be useful,
+//     but WITHOUT ANY WARRANTY; without even the implied warranty of
+//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//     GNU General Public License for more details.
+//
+//     You should have received a copy of the GNU General Public License
+//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// ----------------------------------------------------------------------------
+// Copyright © 2020 Natalia Portillo
+*******************************************************************************/
+
+using System;
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+using RomRepoMgr.ViewModels;
+
+namespace RomRepoMgr.Views
+{
+    public sealed class ExportDat : Window
+    {
+        public ExportDat() => InitializeComponent();
+
+        void InitializeComponent() => AvaloniaXamlLoader.Load(this);
+
+        protected override void OnOpened(EventArgs e)
+        {
+            base.OnOpened(e);
+            (DataContext as ExportDatViewModel)?.OnOpened();
+        }
+    }
+}

RomRepoMgr/Views/MainWindow.xaml

@@ -21,6 +21,7 @@
             </MenuItem>
             <MenuItem Header="ROM _sets"
                       IsEnabled="{Binding SelectedRomSet, Converter={x:Static ObjectConverters.IsNotNull}}">
+                <MenuItem Header="_Save DAT file" Command="{Binding ExportDatCommand}" /> <Separator />
                 <MenuItem Header="_Edit" Command="{Binding EditRomSetCommand}" /> <Separator />
                 <MenuItem Header="_Delete" Command="{Binding DeleteRomSetCommand}" /> <Separator />
             </MenuItem>