public CrawlPlan(LocalManifest localManifest, RemoteManifest remoteManifest, RemoteDataAccess dao)
{
Debug.Assert (localManifest != null);
Debug.Assert (remoteManifest != null);
Debug.Assert (dao != null);
this.dao = dao;
// Clone the local manifest, because we need to make changes to this copy
BuildCrawlPlan (localManifest.Clone (), remoteManifest);
}
protected override void OnDoWork(DoWorkEventArgs e)
{
base.OnDoWork(e);
LocalManifest = FileUtil.ReadManifest(_manifestPath);
RemoteManifest = FileUtil.ReadManifest(LocalManifest.ReleaseUrl + "/" + Manifest.ManifestFileName);
if (LocalManifest.CompareTo(RemoteManifest) != 0)
{
HasNewVersion = true;
if (!string.IsNullOrEmpty(_tempDir))
{
if (!Directory.Exists(_tempDir))
{
Directory.CreateDirectory(_tempDir);
}
RemoteManifest.SaveManifest(Path.Combine(_tempDir, Manifest.ManifestFileName));
//download update files silently
var loader = new Downloader(LocalManifest, RemoteManifest, _tempDir);
loader.RunWorkerAsync();
}
}
}
void BuildCrawlPlan(LocalManifest localManifest, RemoteManifest remoteManifest)
{
Log.Debug ("Building crawl plan");
foreach (RemoteManifestEntry remoteEntry in remoteManifest)
{
PartialCrawlCommand newCommand = PreparePartialCommandFromRemoteEntry (remoteEntry, localManifest);
if (newCommand != null)
{
partialCommands.Enqueue (newCommand);
}
// Remove entries from the local manifest, so we can later
// tell which entries only exist locally
if (localManifest.ContainsKey (remoteEntry.UrlHash))
{
localManifest.Remove (remoteEntry.UrlHash);
}
}
// Any entries left in the local manifest don't exist remotely,
// so they need to be removed
foreach (KeyValuePair <string, LocalManifestEntry> entryPair in localManifest)
{
CrawlCommand newCommand = new CrawlCommand ();
newCommand.Action = CrawlAction.Remove;
newCommand.Post = BuildFakePost (entryPair.Value);
commands.Enqueue (newCommand);
}
}