public HomeController(RepositoryModel repositoryModel, IManifestProvider manifestProvider)
{
_repositoryModel = repositoryModel;
_manifestProvider = manifestProvider;
}
public HomeController(RepositoryModel repositoryModel, IManifestProvider manifestProvider)
{
_repositoryModel = repositoryModel;
_manifestProvider = manifestProvider;
}
/// <summary>
/// Compares the new manifest against the installed files to determine if updates are available
/// </summary>
/// <param name="manifestProvider">Reference to the manifest provider</param>
/// <returns><c>True</c> if files were updated</returns>
public static bool CheckForUpdates( IManifestProvider manifestProvider )
{
bool wereFilesUpdated = false;
const string FileName = "updatemanifest.xml";
const int NeverUpdate = -1;
List<Version> installedVersions = new List<Version>();
List<Version> availableVersions = new List<Version>();
XDocument oldDoc = XDocument.Load( FileName );
ParseXmlToList( installedVersions, oldDoc );
// Check if updates are disabled. Return false if they are.
if ( installedVersions.FirstOrDefault( s => s.ManifestVersion == NeverUpdate ) != null )
{
return false;
}
try
{
// Move the current executables out of the way so they can be updated
RenameExecutingExecutables();
// Check what's available on the server
string manifestContent = manifestProvider.ManifestContent;
XDocument newDoc = XDocument.Parse( manifestContent );
ParseXmlToList( availableVersions, newDoc );
// Apply the updates in order
IEnumerable<Version> sortedList =
availableVersions.OrderBy( s => s.ManifestVersion ).Where(
s => s.ManifestVersion > installedVersions.Max( r => r.ManifestVersion ) );
foreach ( Version version in sortedList )
{
// Let the exception go if the path is malformed
int index = version.PayloadUrl.LastIndexOf( '/' );
FileInfo installFile = new FileInfo( version.PayloadUrl.Substring( index + 1 ) );
manifestProvider.DownloadUpdateArchive( new Uri( version.PayloadUrl ), installFile );
using ( ZipFile zipFile = new ZipFile( installFile.FullName ) )
{
zipFile.ExtractAll( ".", ExtractExistingFileAction.OverwriteSilently );
}
installFile.Delete();
wereFilesUpdated = true;
}
// Save the manifest for the next version check
File.WriteAllText( FileName, manifestContent );
}
finally
{
// Always revert if no updates; otherwise, the service will not restart
if ( RevertExecutableNamesIfNotUpdated() )
{
wereFilesUpdated = true;
}
}
return wereFilesUpdated;
}
