public static bool GetLinksAndTorrent(string internalName,
out List <string> links,
out byte[] torrent,
out List <string> dependencies,
out ResourceType resourceType,
out string torrentFileName)
{
var db = new ZkDataContext();
var resource = db.Resources.SingleOrDefault(x => x.InternalName == internalName);
if (resource == null)
{
torrent = null;
links = null;
dependencies = null;
resourceType = ResourceType.Map;
torrentFileName = null;
return(false);
}
dependencies = resource.ResourceDependencies.Select(x => x.NeedsInternalName).ToList();
resourceType = resource.TypeID;
var bestOld = resource.ResourceContentFiles.FirstOrDefault(x => x.LinkCount == resource.ResourceContentFiles.Max(y => y.LinkCount));
if (bestOld != null && bestOld.LinkCount > 0 && (resource.MissionID != null ||
(resource.LastLinkCheck != null && DateTime.UtcNow.Subtract(resource.LastLinkCheck.Value).TotalHours < 2)))
{
// use cached values for missions or resources checked less than 1 day ago
links = PlasmaServer.GetLinkArray(bestOld);
torrent = PlasmaServer.GetTorrentData(bestOld);
torrentFileName = PlasmaServer.GetTorrentFileName(bestOld);
if (links.Count > 0)
{
db.Database.ExecuteSqlCommand("UPDATE Resources SET DownloadCount = DownloadCount+1 WHERE ResourceID={0}", resource.ResourceID);
}
else
{
db.Database.ExecuteSqlCommand("UPDATE Resources SET NoLinkDownloadCount = NoLinkDownloadCount+1 WHERE ResourceID={0}", resource.ResourceID);
}
return(true);
}
RequestData data;
var isNew = false;
lock (Requests)
{
if (!Requests.TryGetValue(resource.ResourceID, out data))
{
data = new RequestData(resource.ResourceID);
isNew = true;
Requests.Add(resource.ResourceID, data);
}
}
if (!isNew)
{
// request is ongoing, wait for completion
data.WaitHandle.WaitOne();
torrentFileName = PlasmaServer.GetTorrentFileName(data.ContentFile);
links = PlasmaServer.GetLinkArray(data.ContentFile);
torrent = PlasmaServer.GetTorrentData(data.ContentFile);
if (links.Count > 0)
{
db.Database.ExecuteSqlCommand("UPDATE Resources SET DownloadCount = DownloadCount+1 WHERE ResourceID={0}", resource.ResourceID);
}
else
{
db.Database.ExecuteSqlCommand("UPDATE Resources SET NoLinkDownloadCount = NoLinkDownloadCount+1 WHERE ResourceID={0}", resource.ResourceID);
}
return(true);
}
else
{
// new request - actually perform it
try
{
var toCheck = from x in resource.ResourceContentFiles
group x by new { x.FileName, x.Length }
into g
where !g.Key.FileName.EndsWith(".sdp")
select g.First();
Task.WaitAll(toCheck.Select(x => Task.Factory.StartNew(() => UpdateLinks(x))).ToArray());
db.SaveChanges();
// find best content file - the one with most links
var best = resource.ResourceContentFiles.FirstOrDefault(x => x.LinkCount == resource.ResourceContentFiles.Max(y => y.LinkCount));
if (best != null)
{
data.ContentFile = best;
}
else
{
data.ContentFile = resource.ResourceContentFiles.First(); // all content files sux, reurn any
}
links = PlasmaServer.GetLinkArray(data.ContentFile);
torrent = PlasmaServer.GetTorrentData(data.ContentFile);
torrentFileName = PlasmaServer.GetTorrentFileName(data.ContentFile);
if (links.Count > 0)
{
resource.DownloadCount++;
}
else
{
resource.NoLinkDownloadCount++;
}
db.SaveChanges();
return(true);
}
finally
{
lock (Requests) Requests.Remove(data.ResourceID);
data.WaitHandle.Set(); // notify other waiting Requests that its done
}
}
}
