feat: add additional simple result dialog

PantherByte/Messages/OpenSimpleDialogMessage.cs

@@ -0,0 +1,8 @@
+using CommunityToolkit.Mvvm.Messaging.Messages;
+using PantherByte.ViewModels;
+
+namespace PantherByte.Messages;
+
+public class OpenSimpleDialogMessage(SimpleDialogViewModel vm) : AsyncRequestMessage<SimpleDialogViewModel.SimpleDialogResult?> {
+    public SimpleDialogViewModel ViewModel = vm;
+}

PantherByte/ViewModels/DependencyProgressViewModel.cs

@@ -0,0 +1,105 @@
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.Input;
+using ReactiveUI;
+
+namespace PantherByte.ViewModels;
+
+public partial class DependencyProgressViewModel : ViewModelBase, IProgressWindowViewModel {
+    private readonly ProcessStartInfo _processStartInfo;
+    private string _processStdOut = "";
+    private bool _error = false;
+    private bool _inProgress = false;
+    private string _statusMessage = "Downloading ffmpeg...";
+    private string _barColor = "CornflowerBlue";
+
+    public string ProcessStdOut {
+        get => _processStdOut;
+        set => this.RaiseAndSetIfChanged(ref _processStdOut, value);
+    }
+    
+    public string StatusMessage {
+        get => _statusMessage;
+        set => this.RaiseAndSetIfChanged(ref _statusMessage, value);
+    }
+
+    public bool Error {
+        get => _error;
+        set => this.RaiseAndSetIfChanged(ref _error, value);
+    }
+
+    public bool InProgress {
+        get => _inProgress;
+        set => this.RaiseAndSetIfChanged(ref _inProgress, value);
+    }
+
+    public string BarColor {
+        get => _barColor;
+        set => this.RaiseAndSetIfChanged(ref _barColor, value);
+    }
+
+    public DependencyProgressViewModel() {
+        _processStartInfo = new ProcessStartInfo() {
+            UseShellExecute = false
+        };
+        if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
+            // Windows specific command.
+            _processStartInfo.FileName = "winget";
+            _processStartInfo.Arguments = "install ffmpeg";
+            _processStartInfo.Verb = "runas";
+        } else if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux)) {
+            // Linux specific command.
+            _processStartInfo.FileName = "sudo";
+            _processStartInfo.Arguments = "apt install ffmpeg";
+        }
+    }
+    
+    [RelayCommand]
+    public async Task RunProcessAsync() {
+        Process installProcess = new();
+        installProcess.StartInfo = _processStartInfo;
+        
+        installProcess.EnableRaisingEvents = true;
+        installProcess.OutputDataReceived += (s, e) => {
+            if (string.IsNullOrWhiteSpace(e.Data)) return;
+
+            Console.WriteLine(e.Data);
+            ProcessStdOut += e.Data;
+        };
+
+        installProcess.ErrorDataReceived += (s, e) => {
+            if (string.IsNullOrWhiteSpace(e.Data)) return;
+            Console.WriteLine(e.Data);
+            ProcessStdOut += e.Data + "\n";
+            Error = true;
+            StatusMessage = "Error occurred while installing ffmpeg.";
+            BarColor = "Red";
+        };
+
+        InProgress = true;
+        try {
+            installProcess.Start();
+            Console.WriteLine("Installation process started.");
+            installProcess.BeginOutputReadLine();
+            installProcess.BeginErrorReadLine();
+            await installProcess.WaitForExitAsync();
+        }
+        catch (Exception ex) {
+            Console.WriteLine(ex.Message);
+            Error = true;
+            StatusMessage = "Error occurred while installing ffmpeg.";
+            BarColor = "Red";
+            ProcessStdOut += ex.Message;
+        }
+        finally {
+            InProgress = false;
+
+            if (!Error) {
+                BarColor = "Green";
+                StatusMessage = "Download finished!";
+            }
+        }
+    }
+}

PantherByte/ViewModels/IProgressWindowViewModel.cs

@@ -0,0 +1,18 @@
+using System.ComponentModel;
+using System.Threading.Tasks;
+
+namespace PantherByte.ViewModels;
+
+/// <summary>
+/// Defines a series of properties and methods that are used by the <see cref="Views.ProgressWindow"/>.
+/// It requires the implementation of <see cref="INotifyPropertyChanged"/> as well, so that it can
+/// preserve the reactivity of the interface.
+/// </summary>
+public interface IProgressWindowViewModel : INotifyPropertyChanged {
+    public string ProcessStdOut { get; set; }
+    public string StatusMessage { get; set; }
+    public bool Error { get; set; }
+    public bool InProgress { get; set; }
+    public string BarColor { get; set; }
+    public Task RunProcessAsync();
+}

PantherByte/ViewModels/MainWindowViewModel.cs

@@ -13,6 +13,7 @@ using PantherByte.Messages;
 using PantherByte.Services;
 using ReactiveUI;
 using PantherByte.Services.Interfaces;
+using PantherByte.Views;
 
 namespace PantherByte.ViewModels;
 
@@ -147,6 +148,32 @@ public partial class MainWindowViewModel : ViewModelBase {
         });
     }
 
+    private async Task<bool> CheckFfmpegInstalled() {
+        return await Task.Run(async () => {
+            ProcessStartInfo ffmpegInfo = new("ffmpeg") {
+                UseShellExecute = false,
+                RedirectStandardOutput = true,
+                RedirectStandardError = true,
+            };
+
+            Process process = new() {
+                StartInfo = ffmpegInfo
+            };
+
+            bool result = true;
+
+            try {
+                process.Start();
+                await process.WaitForExitAsync();
+            }
+            catch (Exception ex) {
+                result = false;
+            }
+
+            return result;
+        });
+    }
+
     /// <summary>
     /// Handles the download process of the file. Generates the command and runs it.
     /// </summary>
@@ -167,6 +194,17 @@ public partial class MainWindowViewModel : ViewModelBase {
             };
             info.ArgumentList.AddRange(args[1..]);
             
+            // Check that ffmpeg is installed.
+            var temp = await CheckFfmpegInstalled();
+            // if (!await CheckFfmpegInstalled()) {
+            SimpleDialogViewModel vm = new("Dependency ffmpeg was not found. Would you like to install it?",
+                "Dependency Install");
+                var result = await WeakReferenceMessenger.Default.Send(new OpenSimpleDialogMessage(vm));
+                if (result is not null) {
+                    Console.WriteLine($"Received result: {result}");
+                }
+            // }
+            
             // This window isn't linked to the download process yet, but that is the plan.
             await OpenProgressWindowAsync(info);
         } catch (Exception ex) {

PantherByte/ViewModels/ProgressWindowViewModel.cs

@@ -5,7 +5,7 @@ using ReactiveUI;
 
 namespace PantherByte.ViewModels;
 
-public class ProgressWindowViewModel : ViewModelBase {
+public partial class ProgressWindowViewModel : ViewModelBase, IProgressWindowViewModel {
     // Pass variables between the MainWindow and this window, specifically what point the application
     // is at in terms of downloading. We'll likely do this as a simple percentage of total progress.
     private readonly ProcessStartInfo _processStartInfo;
@@ -49,11 +49,12 @@ public class ProgressWindowViewModel : ViewModelBase {
         Process downloadProcess = new();
         downloadProcess.StartInfo = _processStartInfo;
         
+        downloadProcess.EnableRaisingEvents = true;
         downloadProcess.OutputDataReceived += (_, e) => {
-            if (!string.IsNullOrWhiteSpace(e.Data)) {
+            if (string.IsNullOrWhiteSpace(e.Data)) return;
+            
             Console.WriteLine(e.Data);
             ProcessStdOut += e.Data + "\n";
-            }
         };
 
         downloadProcess.ErrorDataReceived += (_, e) => {

PantherByte/ViewModels/SimpleDialogViewModel.cs

@@ -0,0 +1,14 @@
+using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.Input;
+
+namespace PantherByte.ViewModels;
+
+public partial class SimpleDialogViewModel(string prompt, string title) : ViewModelBase {
+    public enum SimpleDialogResult {
+        Yes,
+        No
+    }
+    
+    public string PromptMessage { get; set; } = prompt;
+    public string Title { get; set; } = title;
+}

PantherByte/Views/MainWindow.axaml.cs

@@ -16,5 +16,13 @@ public partial class MainWindow : Window {
                 };
                 m.Reply(dialog.ShowDialog<ProgressWindowViewModel?>(w));
             });
+
+        WeakReferenceMessenger.Default.Register<MainWindow, OpenSimpleDialogMessage>(this,
+            static (w, m) => {
+                var dialog = new SimpleDialog {
+                    DataContext = m.ViewModel
+                };
+                m.Reply(dialog.ShowDialog<SimpleDialogViewModel.SimpleDialogResult?>(w));
+            });
     }
 }

PantherByte/Views/ProgressWindow.axaml.cs

@@ -9,9 +9,7 @@ public partial class ProgressWindow : Window {
         
         // This feels a little fragile, but we'll leave it for now.
         Opened += async (_, _) => {
-            if (DataContext is not ProgressWindowViewModel vm)
-                return;
-            
+            if (DataContext is IProgressWindowViewModel vm)
                 await vm.RunProcessAsync();
         };
 

PantherByte/Views/SimpleDialog.axaml

@@ -0,0 +1,35 @@
+<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="using:PantherByte.ViewModels"
+        x:DataType="vm:SimpleDialogViewModel"
+        mc:Ignorable="d"
+        x:Class="PantherByte.Views.SimpleDialog"
+        WindowStartupLocation="CenterOwner"
+        SizeToContent="WidthAndHeight"
+        Background="Gray"
+        Title="{Binding Title}"
+        CanMaximize="False">
+    <Design.DataContext>
+        <!-- This only sets the DataContext for the previewer in an IDE,
+             to set the actual DataContext for runtime, set the DataContext property in code (look at App.axaml.cs) -->
+        <vm:SimpleDialogViewModel/>
+    </Design.DataContext>
+    
+    <StackPanel Spacing="20" Margin="10" HorizontalAlignment="Stretch">
+        <TextBlock Text="{Binding PromptMessage}" HorizontalAlignment="Center"/>
+        <Grid ColumnDefinitions="*, *" ColumnSpacing="10" Width="200" MaxWidth="300">
+            <Button Grid.Column="0"
+                    Content="Yes"
+                    HorizontalAlignment="Stretch"
+                    HorizontalContentAlignment="Center"
+                    Click="YesButtonClicked"/>
+            <Button Grid.Column="1"
+                    Content="No"
+                    HorizontalAlignment="Stretch"
+                    HorizontalContentAlignment="Center"
+                    Click="NoButtonClicked"/>
+        </Grid>
+    </StackPanel>
+</Window>

PantherByte/Views/SimpleDialog.axaml.cs

@@ -0,0 +1,19 @@
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Markup.Xaml;
+using PantherByte.ViewModels;
+
+namespace PantherByte.Views;
+
+public partial class SimpleDialog : Window {
+    public SimpleDialog() {
+        InitializeComponent();
+    }
+
+    public void YesButtonClicked(object sender, RoutedEventArgs e) =>
+        Close(SimpleDialogViewModel.SimpleDialogResult.Yes);
+    
+    public void NoButtonClicked(object sender, RoutedEventArgs e) =>
+        Close(SimpleDialogViewModel.SimpleDialogResult.No);
+}