romrepomgr/RomRepoMgr/ViewModels/SettingsViewModel.cs

/******************************************************************************
// 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 © 2017-2024 Natalia Portillo
*******************************************************************************/

using System;
using System.IO;
using System.Reactive;
using System.Threading.Tasks;
using Avalonia.Controls;
using Avalonia.Threading;
using MessageBox.Avalonia;
using MessageBox.Avalonia.Enums;
using Microsoft.EntityFrameworkCore;
using ReactiveUI;
using RomRepoMgr.Core.EventArgs;
using RomRepoMgr.Core.Workers;
using RomRepoMgr.Database;
using RomRepoMgr.Resources;
using RomRepoMgr.Views;
using ErrorEventArgs = RomRepoMgr.Core.EventArgs.ErrorEventArgs;

namespace RomRepoMgr.ViewModels;

public sealed class SettingsViewModel : ViewModelBase
{
    readonly SettingsDialog _view;
    bool                    _databaseChanged;
    string                  _databasePath;
    bool                    _repositoryChanged;
    string                  _repositoryPath;
    bool                    _temporaryChanged;
    string                  _temporaryPath;
    bool                    _unArChanged;
    string                  _unArPath;
    string                  _unArVersion;

    public SettingsViewModel(SettingsDialog view)
    {
        _view              = view;
        _databaseChanged   = false;
        _repositoryChanged = false;
        _temporaryChanged  = false;
        _unArChanged       = false;

        CloseCommand      = ReactiveCommand.Create(ExecuteCloseCommand);
        UnArCommand       = ReactiveCommand.Create(ExecuteUnArCommand);
        TemporaryCommand  = ReactiveCommand.Create(ExecuteTemporaryCommand);
        RepositoryCommand = ReactiveCommand.Create(ExecuteRepositoryCommand);
        DatabaseCommand   = ReactiveCommand.Create(ExecuteDatabaseCommand);
        SaveCommand       = ReactiveCommand.Create(ExecuteSaveCommand);

        DatabasePath   = Settings.Settings.Current.DatabasePath;
        RepositoryPath = Settings.Settings.Current.RepositoryPath;
        TemporaryPath  = Settings.Settings.Current.TemporaryFolder;
        UnArPath       = Settings.Settings.Current.UnArchiverPath;

        if(!string.IsNullOrWhiteSpace(UnArPath)) CheckUnAr();
    }

    public string ChooseLabel     => Localization.ChooseLabel;
    public string Title           => Localization.SettingsTitle;
    public string CloseLabel      => Localization.CloseLabel;
    public string DatabaseLabel   => Localization.DatabaseFileLabel;
    public string RepositoryLabel => Localization.RepositoryFolderLabel;
    public string TemporaryLabel  => Localization.TemporaryFolderLabel;
    public string UnArPathLabel   => Localization.UnArPathLabel;

    public ReactiveCommand<Unit, Unit> UnArCommand       { get; }
    public ReactiveCommand<Unit, Unit> TemporaryCommand  { get; }
    public ReactiveCommand<Unit, Unit> RepositoryCommand { get; }
    public ReactiveCommand<Unit, Unit> DatabaseCommand   { get; }
    public ReactiveCommand<Unit, Unit> CloseCommand      { get; }
    public ReactiveCommand<Unit, Unit> SaveCommand       { get; }

    public string DatabasePath
    {
        get => _databasePath;
        set
        {
            this.RaiseAndSetIfChanged(ref _databasePath, value);
            _databaseChanged = true;
        }
    }

    public string RepositoryPath
    {
        get => _repositoryPath;
        set
        {
            this.RaiseAndSetIfChanged(ref _repositoryPath, value);

            // TODO: Refresh repository existing files
            _repositoryChanged = true;
        }
    }

    public string TemporaryPath
    {
        get => _temporaryPath;
        set
        {
            this.RaiseAndSetIfChanged(ref _temporaryPath, value);
            _temporaryChanged = true;
        }
    }

    public string UnArPath
    {
        get => _unArPath;
        set => this.RaiseAndSetIfChanged(ref _unArPath, value);
    }

    public string UnArVersion
    {
        get => _unArVersion;
        set => this.RaiseAndSetIfChanged(ref _unArVersion, value);
    }

    public string SaveLabel => Localization.SaveLabel;

    void CheckUnAr()
    {
        var worker = new Compression();

        worker.FinishedWithText += CheckUnArFinished;
        worker.FailedWithText   += CheckUnArFailed;

        Task.Run(() => worker.CheckUnAr(UnArPath));
    }

    async void CheckUnArFailed(object sender, ErrorEventArgs args)
    {
        UnArVersion = "";
        UnArPath    = "";

        await MessageBoxManager
             .GetMessageBoxStandardWindow(Localization.Error, $"{args.Message}", ButtonEnum.Ok, Icon.Error)
             .ShowDialog(_view);
    }

    void CheckUnArFinished(object sender, MessageEventArgs args) => Dispatcher.UIThread.Post(() =>
    {
        UnArVersion  = string.Format(Localization.TheUnarchiverVersionLabel, args.Message);
        _unArChanged = true;
    });

    void ExecuteCloseCommand() => _view.Close();

    async void ExecuteUnArCommand()
    {
        var dlgFile = new OpenFileDialog
        {
            Title         = Localization.ChooseUnArExecutable,
            AllowMultiple = false
        };

        if(!string.IsNullOrWhiteSpace(Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles)))
            dlgFile.Directory = Environment.GetFolderPath(Environment.SpecialFolder.ProgramFiles);

        string[] result = await dlgFile.ShowAsync(_view);

        if(result?.Length != 1) return;

        UnArPath = result[0];
        CheckUnAr();
    }

    async void ExecuteTemporaryCommand()
    {
        var dlgFolder = new OpenFolderDialog
        {
            Title = Localization.ChooseTemporaryFolder
        };

        string result = await dlgFolder.ShowAsync(_view);

        if(result == null) return;

        TemporaryPath = result;
    }

    async void ExecuteRepositoryCommand()
    {
        var dlgFolder = new OpenFolderDialog
        {
            Title = Localization.ChooseRepositoryFolder
        };

        string result = await dlgFolder.ShowAsync(_view);

        if(result == null) return;

        RepositoryPath = result;
    }

    async void ExecuteDatabaseCommand()
    {
        var dlgFile = new SaveFileDialog
        {
            InitialFileName = "romrepo.db",
            Directory       = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments),
            Title           = Localization.ChooseDatabaseFile
        };

        string result = await dlgFile.ShowAsync(_view);

        if(result == null) return;

        if(File.Exists(result))
        {
            ButtonResult btnResult = await MessageBoxManager
                                          .GetMessageBoxStandardWindow(Localization.DatabaseFileExistsMsgBoxTitle,
                                                                       Localization.DatabaseFileTryOpenCaption,
                                                                       ButtonEnum.YesNo,
                                                                       Icon.Database)
                                          .ShowDialog(_view);

            if(btnResult == ButtonResult.Yes)
            {
                try
                {
                    var ctx = Context.Create(result);
                    await ctx.Database.MigrateAsync();
                }
                catch(Exception)
                {
                    btnResult = await MessageBoxManager
                                     .GetMessageBoxStandardWindow(Localization.DatabaseFileUnusableMsgBoxTitle,
                                                                  Localization.DatabaseFileUnusableDeleteMsgBoxCaption,
                                                                  ButtonEnum.YesNo,
                                                                  Icon.Error)
                                     .ShowDialog(_view);

                    if(btnResult == ButtonResult.No) return;

                    try
                    {
                        File.Delete(result);
                    }
                    catch(Exception)
                    {
                        await MessageBoxManager
                             .GetMessageBoxStandardWindow(Localization.DatabaseFileCannotDeleteTitle,
                                                          Localization.DatabaseFileCannotDeleteCaption,
                                                          ButtonEnum.Ok,
                                                          Icon.Error)
                             .ShowDialog(_view);

                        return;
                    }
                }
            }
            else
            {
                btnResult = await MessageBoxManager
                                 .GetMessageBoxStandardWindow(Localization.DatabaseFileExistsMsgBoxTitle,
                                                              Localization.DatabaseFileDeleteCaption,
                                                              ButtonEnum.YesNo,
                                                              Icon.Error)
                                 .ShowDialog(_view);

                if(btnResult == ButtonResult.No) return;

                try
                {
                    File.Delete(result);
                }
                catch(Exception)
                {
                    await MessageBoxManager
                         .GetMessageBoxStandardWindow(Localization.DatabaseFileCannotDeleteTitle,
                                                      Localization.DatabaseFileCannotDeleteCaption,
                                                      ButtonEnum.Ok,
                                                      Icon.Error)
                         .ShowDialog(_view);

                    return;
                }
            }
        }

        try
        {
            var ctx = Context.Create(result);
            await ctx.Database.MigrateAsync();
        }
        catch(Exception)
        {
            await MessageBoxManager
                 .GetMessageBoxStandardWindow(Localization.DatabaseFileUnusableMsgBoxTitle,
                                              Localization.DatabaseFileUnusableMsgBoxCaption,
                                              ButtonEnum.Ok,
                                              Icon.Error)
                 .ShowDialog(_view);

            return;
        }

        DatabasePath = result;
    }

    void ExecuteSaveCommand()
    {
        if(_databaseChanged) Settings.Settings.Current.DatabasePath = DatabasePath;

        if(_repositoryChanged) Settings.Settings.Current.RepositoryPath = RepositoryPath;

        if(_temporaryChanged) Settings.Settings.Current.TemporaryFolder = TemporaryPath;

        if(_unArChanged)
        {
            Settings.Settings.Current.UnArchiverPath = UnArPath;
            Settings.Settings.UnArUsable             = true;
        }

        if(_databaseChanged || _repositoryChanged || _temporaryChanged || _unArChanged)
            Settings.Settings.SaveSettings();

        _view.Close();
    }
}