private bool OnDownloadProgress(DownloadProgressEventArgs e)
{
DownloadProgress?.Invoke(this, e);
return(e.Cancel);
}
public void Download(WebClient client, string updatePath)
{
var cancelArgs = new CancelEventArgs(false);
DownloadProgressEventArgs downloadArgs = null;
int fileDownloading = 0;
void DownloadComplete(object sender, AsyncCompletedEventArgs args)
{
lock (args.UserState)
{
Monitor.Pulse(args.UserState);
}
}
void DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs args)
{
downloadArgs = new DownloadProgressEventArgs(args, fileDownloading, FilesToDownload);
if (OnDownloadProgress(downloadArgs))
{
((WebClient)sender).CancelAsync();
}
}
switch (Type)
{
case ModDownloadType.Archive:
{
var uri = new Uri(Url);
if (!uri.Host.EndsWith("github.com"))
{
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(uri);
req.Method = "HEAD";
HttpWebResponse res = (HttpWebResponse)req.GetResponse();
uri = res.ResponseUri;
res.Close();
}
string filePath = Path.Combine(updatePath, uri.Segments.Last());
var info = new FileInfo(filePath);
if (info.Exists && info.Length == Size)
{
if (OnDownloadCompleted(cancelArgs))
{
return;
}
}
else
{
if (OnDownloadStarted(cancelArgs))
{
return;
}
client.DownloadFileCompleted += DownloadComplete;
client.DownloadProgressChanged += DownloadProgressChanged;
++fileDownloading;
var sync = new object();
lock (sync)
{
client.DownloadFileAsync(uri, filePath, sync);
Monitor.Wait(sync);
}
client.DownloadProgressChanged -= DownloadProgressChanged;
client.DownloadFileCompleted -= DownloadComplete;
if (cancelArgs.Cancel || downloadArgs?.Cancel == true)
{
return;
}
if (OnDownloadCompleted(cancelArgs))
{
return;
}
}
string dataDir = Path.Combine(updatePath, Path.GetFileNameWithoutExtension(filePath));
if (!Directory.Exists(dataDir))
{
Directory.CreateDirectory(dataDir);
}
if (OnExtracting(cancelArgs))
{
return;
}
Process.Start(new ProcessStartInfo("7za.exe", $"x -aoa -o\"{dataDir}\" \"{filePath}\"")
{
UseShellExecute = false, CreateNoWindow = true
}).WaitForExit();
string workDir = Path.GetDirectoryName(ModInfo.GetModFiles(new DirectoryInfo(dataDir)).FirstOrDefault());
if (string.IsNullOrEmpty(workDir))
{
throw new DirectoryNotFoundException("Unable to locate mod.ini in " + dataDir);
}
string newManPath = Path.Combine(workDir, "mod.manifest");
string oldManPath = Path.Combine(Folder, "mod.manifest");
if (OnParsingManifest(cancelArgs))
{
return;
}
if (!File.Exists(newManPath) || !File.Exists(oldManPath))
{
CopyDirectory(new DirectoryInfo(workDir), Directory.CreateDirectory(Folder));
Directory.Delete(dataDir, true);
if (File.Exists(filePath))
{
File.Delete(filePath);
}
return;
}
if (OnParsingManifest(cancelArgs))
{
return;
}
List <ModManifest> newManifest = ModManifest.FromFile(newManPath);
if (OnApplyingManifest(cancelArgs))
{
return;
}
List <ModManifest> oldManifest = ModManifest.FromFile(oldManPath);
List <string> oldFiles = oldManifest.Except(newManifest)
.Select(x => Path.Combine(Folder, x.FilePath))
.ToList();
foreach (string file in oldFiles)
{
if (File.Exists(file))
{
File.Delete(file);
}
}
RemoveEmptyDirectories(oldManifest, newManifest);
foreach (ModManifest file in newManifest)
{
string dir = Path.GetDirectoryName(file.FilePath);
if (!string.IsNullOrEmpty(dir))
{
string newDir = Path.Combine(Folder, dir);
if (!Directory.Exists(newDir))
{
Directory.CreateDirectory(newDir);
}
}
string dest = Path.Combine(Folder, file.FilePath);
if (File.Exists(dest))
{
File.Delete(dest);
}
File.Move(Path.Combine(workDir, file.FilePath), dest);
}
File.Copy(newManPath, oldManPath, true);
Directory.Delete(dataDir, true);
File.WriteAllText(Path.Combine(Folder, "mod.version"), Updated);
if (File.Exists(filePath))
{
File.Delete(filePath);
}
break;
}
case ModDownloadType.Modular:
{
// First let's download all the new stuff.
List <ModManifestDiff> newEntries = ChangedFiles
.Where(x => x.State == ModManifestState.Added || x.State == ModManifestState.Changed)
.ToList();
var uri = new Uri(Url);
string tempDir = Path.Combine(updatePath, uri.Segments.Last());
if (!Directory.Exists(tempDir))
{
Directory.CreateDirectory(tempDir);
}
var sync = new object();
foreach (ModManifestDiff i in newEntries)
{
string filePath = Path.Combine(tempDir, i.Current.FilePath);
string dir = Path.GetDirectoryName(filePath);
if (!string.IsNullOrEmpty(dir) && !Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
if (OnDownloadStarted(cancelArgs))
{
return;
}
var info = new FileInfo(filePath);
++fileDownloading;
if (!info.Exists || info.Length != i.Current.FileSize ||
!i.Current.Checksum.Equals(ModManifestGenerator.GetFileHash(filePath), StringComparison.InvariantCultureIgnoreCase))
{
client.DownloadFileCompleted += DownloadComplete;
client.DownloadProgressChanged += DownloadProgressChanged;
lock (sync)
{
client.DownloadFileAsync(new Uri(uri, i.Current.FilePath), filePath, sync);
Monitor.Wait(sync);
}
client.DownloadProgressChanged -= DownloadProgressChanged;
client.DownloadFileCompleted -= DownloadComplete;
info.Refresh();
if (info.Length != i.Current.FileSize)
{
throw new Exception(string.Format("Size of downloaded file \"{0}\" ({1}) differs from manifest ({2}).",
i.Current.FilePath, SizeSuffix.GetSizeSuffix(info.Length), SizeSuffix.GetSizeSuffix(i.Current.FileSize)));
}
var hash = ModManifestGenerator.GetFileHash(filePath);
if (!i.Current.Checksum.Equals(hash, StringComparison.InvariantCultureIgnoreCase))
{
throw new Exception(string.Format("Checksum of downloaded file \"{0}\" ({1}) differs from manifest ({2}).",
i.Current.FilePath, hash, i.Current.Checksum));
}
}
if (cancelArgs.Cancel || downloadArgs?.Cancel == true)
{
return;
}
if (OnDownloadCompleted(cancelArgs))
{
return;
}
}
client.DownloadFileCompleted += DownloadComplete;
lock (sync)
{
client.DownloadFileAsync(new Uri(uri, "mod.manifest"), Path.Combine(tempDir, "mod.manifest"), sync);
Monitor.Wait(sync);
}
client.DownloadFileCompleted -= DownloadComplete;
// Now handle all file operations except where removals are concerned.
List <ModManifestDiff> movedEntries = ChangedFiles.Except(newEntries)
.Where(x => x.State == ModManifestState.Moved)
.ToList();
if (OnApplyingManifest(cancelArgs))
{
return;
}
// Handle existing entries marked as moved.
foreach (ModManifestDiff i in movedEntries)
{
ModManifest old = i.Last;
// This would be considered an error...
if (old == null)
{
continue;
}
string oldPath = Path.Combine(Folder, old.FilePath);
string newPath = Path.Combine(tempDir, i.Current.FilePath);
string dir = Path.GetDirectoryName(newPath);
if (!string.IsNullOrEmpty(dir) && !Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
File.Copy(oldPath, newPath, true);
}
// Now move the stuff from the temporary folder over to the working directory.
foreach (ModManifestDiff i in newEntries.Concat(movedEntries))
{
string tempPath = Path.Combine(tempDir, i.Current.FilePath);
string workPath = Path.Combine(Folder, i.Current.FilePath);
string dir = Path.GetDirectoryName(workPath);
if (!string.IsNullOrEmpty(dir) && !Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
File.Copy(tempPath, workPath, true);
}
// Once that has succeeded we can safely delete files that have been marked for removal.
List <ModManifestDiff> removedEntries = ChangedFiles
.Where(x => x.State == ModManifestState.Removed)
.ToList();
foreach (string path in removedEntries.Select(i => Path.Combine(Folder, i.Current.FilePath)).Where(File.Exists))
{
File.Delete(path);
}
// Same for files that have been moved.
foreach (string path in movedEntries
.Where(x => newEntries.All(y => y.Current.FilePath != x.Last.FilePath))
.Select(i => Path.Combine(Folder, i.Last.FilePath)).Where(File.Exists))
{
File.Delete(path);
}
string oldManPath = Path.Combine(Folder, "mod.manifest");
string newManPath = Path.Combine(tempDir, "mod.manifest");
if (File.Exists(oldManPath))
{
List <ModManifest> oldManifest = ModManifest.FromFile(oldManPath);
List <ModManifest> newManifest = ModManifest.FromFile(newManPath);
// Remove directories that are now empty.
RemoveEmptyDirectories(oldManifest, newManifest);
}
// And last but not least, copy over the new manifest.
File.Copy(newManPath, oldManPath, true);
break;
}
default:
throw new ArgumentOutOfRangeException();
}
}