I'm going to play tetris

JiayiLauncher/Features/Versions/VersionManager.cs

@@ -1,33 +1,81 @@
-using System.IO;
+using System;
+using System.IO;
+using System.IO.Compression;
 using System.Linq;
 using System.Net.Http;
 using System.Security.Cryptography;
 using System.Threading.Tasks;
 using JiayiLauncher.Settings;
+using JiayiLauncher.Utils;
 
 namespace JiayiLauncher.Features.Versions;
 
 public static class VersionManager
 {
+	public static event EventHandler<EventArgs>? DownloadFinished; 
+
 	public static bool VersionInstalled(string ver)
 	{
+		Directory.CreateDirectory(JiayiSettings.Instance!.VersionsPath);
 		var folders = Directory.GetDirectories(JiayiSettings.Instance!.VersionsPath);
 		return folders.Any(x => x.Contains(ver));
 	}
 
-	// haven't finished this code yet pls no touch
-	// public static async Task DownloadVersion(MinecraftVersion version)
-	// {
-	// 	var updateId = version.Archs.x64!.UpdateIds[0];
-	// 	var url = await RequestFactory.GetDownloadUrl(updateId);
-	// 	var fileName = version.Archs.x64.FileName;
-	// 	var filePath = Path.Combine(JiayiSettings.Instance!.VersionsPath, fileName);
-	// 	
-	// 	var hash = MD5.HashData(await File.ReadAllBytesAsync(filePath));
-	// 	var hashString = string.Join("", hash.Select(x => x.ToString("x2")));
-	// 	if (hashString == version.Archs.x64.Hashes.MD5) return;
-	//
-	// 	using var client = new HttpClient();
-	// 	using 
-	// }
+	public static async Task DownloadVersion(MinecraftVersion version, IProgress<ProgressEventArgs> progress)
+	{
+		var updateId = version.Archs.x64!.UpdateIds[0];
+		var url = await RequestFactory.GetDownloadUrl(updateId);
+		var fileName = version.Archs.x64.FileName;
+		var filePath = Path.Combine(JiayiSettings.Instance!.VersionsPath, fileName);
+
+		if (File.Exists(filePath)) File.Delete(filePath);
+
+		using var client = new HttpClient();
+		using var response = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead);
+
+		if (!response.IsSuccessStatusCode) return;
+
+		var contentLength = response.Content.Headers.ContentLength;
+		var totalRead = 0L;
+		var buffer = new byte[1048576]; // 1 MB buffer
+
+		await using var stream = await response.Content.ReadAsStreamAsync();
+		await using var fileStream = new FileStream(filePath, FileMode.Create);
+
+		progress.Report(new ProgressEventArgs(0));
+
+		while (true)
+		{
+			var read = await stream.ReadAsync(buffer);
+			if (read == 0) break;
+
+			await fileStream.WriteAsync(buffer.AsMemory(0, read));
+			totalRead += read;
+			progress.Report(new ProgressEventArgs((int)(totalRead * 100 / contentLength)!));
+		}
+
+		progress.Report(new ProgressEventArgs(100));
+
+		fileStream.Close();
+		stream.Close();
+
+		var folder = Path.Combine(JiayiSettings.Instance.VersionsPath, version.Version);
+		Directory.CreateDirectory(folder);
+		ZipFile.ExtractToDirectory(filePath, folder);
+		File.Delete(filePath);
+
+		DownloadFinished?.Invoke(null, EventArgs.Empty);
+	}
+
+	public static async Task RemoveVersion(string ver)
+	{
+		await Task.Run(() =>
+		{
+			var folders = Directory.GetDirectories(JiayiSettings.Instance!.VersionsPath);
+			var folder = folders.FirstOrDefault(x => x.Contains(ver));
+			if (folder == null) return;
+
+			Directory.Delete(folder, true);
+		});
+	}
 }

JiayiLauncher/Pages/Extra/FullVersionList.razor

@@ -1,6 +1,7 @@
 @page "/Versions/Full/{version?}"
 @using JiayiLauncher.Features.Versions
 @using Microsoft.JSInterop
+@using ProgressEventArgs = JiayiLauncher.Utils.ProgressEventArgs
 
 @* javascript :( *@
 @inject IJSRuntime JavaScript
@@ -38,9 +39,39 @@
                     var name = versions[i].Key;
                     var id = name.Replace(".", "");
                     var version = versions[i].Value;
+                    var text = string.Empty;
+                    var downloadDisabled = false;
 
                     <li class="version" id="@id">
-                        <strong>@name</strong>
+                        <div class="version-text">
+                            <strong>@name</strong>
+                            <i>@text</i>
+                        </div>
+
+                        <div class="version-buttons">
+                            @if (VersionManager.VersionInstalled(name))
+                            {
+                                <JiayiButton Size="JiayiButton.ButtonSize.Small" 
+                                             OnClick="async () => await RemoveClicked(name)">Remove</JiayiButton>
+                                <JiayiButton Size="JiayiButton.ButtonSize.Small">Switch</JiayiButton>
+                            }
+                            else
+                            {
+                                text = "0% downloaded";
+                                var progress = new Progress<ProgressEventArgs>(args =>
+                                {
+                                    downloadDisabled = true;
+                                    text = args.Percentage == 100 ? $"{args.Percentage}% downloaded" : "Extracting...";
+                                    StateHasChanged();
+                                });
+
+                                <JiayiButton Size="JiayiButton.ButtonSize.Small"
+                                             Disabled="@downloadDisabled"
+                                             OnClick="async () => await VersionManager.DownloadVersion(version, progress)">
+                                    Download
+                                </JiayiButton>
+                            }
+                        </div>
                     </li>
                 }
             </ul>
@@ -62,6 +93,9 @@
 
     [Parameter]
     public bool ShowTitle { get; set; } = true;
+
+    [CascadingParameter]
+    public IModalService ModalService { get; set; } = default!;
 
     private Dictionary<string, MinecraftVersion>? _versionList;
     private int _amountToDisplay = 10;
@@ -73,6 +107,7 @@
     protected override async Task OnInitializedAsync()
     {
         _versionList = await VersionList.GetFullVersionList();
+        VersionManager.DownloadFinished += (_, _) => StateHasChanged();
     }
 
     protected override async Task OnParametersSetAsync()
@@ -93,4 +128,24 @@
         NavigationManager.NavigateTo("/Versions");
     }
 
+    private async Task RemoveClicked(string ver)
+    {
+        var options = new List<(string, EventCallback)>
+        {
+            ("Yes", new EventCallback(null, async () =>
+            {
+                await VersionManager.RemoveVersion(ver);
+                StateHasChanged();
+            })),
+            ("No", EventCallback.Empty)
+        };
+
+        var parameters = new ModalParameters()
+            .Add(nameof(MessageBox.Buttons), options)
+            .Add(nameof(MessageBox.Message), "Are you sure you want to remove this version?");
+
+        var modal = ModalService.Show<MessageBox>("Remove version", parameters);
+        await modal.Result;
+        StateHasChanged();
+    }
 }

JiayiLauncher/Pages/Extra/FullVersionList.razor.css

@@ -56,6 +56,22 @@
     background-color: var(--background-secondary);
 }
 
+.version-text {
+    display: flex;
+    gap: 0.5rem;
+}
+
+.version-text i {
+    color: var(--text-grayed);
+    font-size: 14px;
+    font-style: italic;
+}
+
+.version-buttons {
+    display: flex;
+    gap: 0.5rem;
+}
+
 .load-more {
     cursor: pointer;
     display: flex;

JiayiLauncher/Utils/ProgressEventArgs.cs

@@ -0,0 +1,13 @@
+using System;
+
+namespace JiayiLauncher.Utils;
+
+public class ProgressEventArgs : EventArgs
+{
+	public int Percentage { get; set; }
+
+	public ProgressEventArgs(int percentage)
+	{
+		Percentage = percentage;
+	}
+}