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// Copyright (C) 2025 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
using System;
using System.IO;
using System.IO.Compression;
using System.Threading;
using Microsoft.VisualStudio.Shell;
using Tasks = System.Threading.Tasks;
namespace QtVsTools.Core.Common
{
public static partial class Utils
{
private const int BufferSize = 81920; // buffer size 80 KB
/// <summary>
/// Extracts all files from a ZIP archive to the specified target directory synchronously.
/// </summary>
/// <param name="sourceArchive">The path to the ZIP archive to extract.</param>
/// <param name="targetDirectory">The directory where the files will be extracted.</param>
/// <param name="callback">
/// An optional callback invoked during extraction, reporting progress as a tuple:
/// (TotalEntries, CurrentEntry, FullName).
/// </param>
public static void ExtractArchive(string sourceArchive, string targetDirectory,
Func<(long TotalEntries, long CurrentEntry, string FullName), Tasks.Task> callback = null)
{
ThreadHelper.JoinableTaskFactory.Run(() => ExtractArchiveAsync(sourceArchive,
targetDirectory, CancellationToken.None, callback));
}
/// <summary>
/// Extracts all files from a ZIP archive to the specified target directory asynchronously.
/// </summary>
/// <param name="sourceArchive">The path to the ZIP archive to extract.</param>
/// <param name="targetDir">The directory where the files will be extracted.</param>
/// <param name="token">A cancellation token to monitor for cancellation requests.</param>
/// <param name="callback">
/// An optional callback invoked during extraction, reporting progress as a tuple:
/// (TotalEntries, CurrentEntry, FullName).
/// </param>
/// <returns>A task representing the asynchronous operation.</returns>
public static async Tasks.Task ExtractArchiveAsync(string sourceArchive, string targetDir,
CancellationToken token,
Func<(long TotalEntries, long CurrentEntry, string FullName), Tasks.Task> callback = null)
{
if (sourceArchive == null || targetDir == null)
return;
targetDir = Directory.CreateDirectory(targetDir).FullName;
using var srcStream = new FileStream(sourceArchive, FileMode.Open, FileAccess.Read,
FileShare.Read, BufferSize);
using var archive = new ZipArchive(srcStream, ZipArchiveMode.Read);
var currentEntry = 0;
var totalEntries = archive.Entries.Count;
foreach (var entry in archive.Entries) {
token.ThrowIfCancellationRequested();
await ExtractEntryAsync(entry, targetDir, token);
if (callback != null)
await callback.Invoke((totalEntries, ++currentEntry, entry.FullName));
}
}
/// <summary>
/// Extracts a single ZIP archive entry to the specified target directory asynchronously.
/// </summary>
/// <param name="entry">The ZIP archive entry to extract.</param>
/// <param name="targetDir">The directory where the entry will be extracted.</param>
/// <param name="token">A cancellation token to monitor for cancellation requests.</param>
/// <returns>A task representing the asynchronous operation.</returns>
private static async Tasks.Task ExtractEntryAsync(ZipArchiveEntry entry, string targetDir,
CancellationToken token)
{
var targetFile = Path.Combine(targetDir, entry.FullName);
if (!Directory.Exists(targetDir = Path.GetDirectoryName(targetFile)))
Directory.CreateDirectory(targetDir!);
{ // scoped to close both source and target stream
using var source = entry.Open();
using var stream = new FileStream(targetFile, FileMode.Create, FileAccess.Write,
FileShare.None, BufferSize);
int count;
var buffer = new byte[BufferSize];
while ((count = await source.ReadAsync(buffer, 0, buffer.Length, token)) > 0) {
token.ThrowIfCancellationRequested();
await stream.WriteAsync(buffer, 0, count, token);
}
}
File.SetLastWriteTime(targetFile, entry.LastWriteTime.DateTime);
}
}
}
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