public IEnumerable <Metadata> Transform(Metadata metadata, TransformOptions opts)
{
Log.Debug("Fixing version strings (if required)...");
var json = metadata.Json();
JToken epoch;
if (json.TryGetValue("x_netkan_epoch", out epoch))
{
Log.InfoFormat("Executing epoch transformation with {0}", metadata.Kref);
Log.DebugFormat("Input metadata:{0}{1}", Environment.NewLine, json);
uint epochNumber;
if (uint.TryParse(epoch.ToString(), out epochNumber))
{
//Implicit if zero. No need to add
if (epochNumber != 0)
{
json["version"] = epochNumber + ":" + json["version"];
}
Log.DebugFormat("Transformed metadata:{0}{1}", Environment.NewLine, json);
}
else
{
throw new BadMetadataKraken(null, "Invalid epoch: " + epoch + " In " + json["identifier"]);
}
}
JToken allowOOO;
if (json.TryGetValue("x_netkan_allow_out_of_order", out allowOOO) && (bool)allowOOO)
{
Log.Debug("Out of order versions enabled in netkan, skipping OOO check");
}
else if (opts.HighestVersion != null)
{
// Ensure we are greater or equal to the previous max
ModuleVersion startV = new ModuleVersion((string)json["version"]);
ModuleVersion currentV = startV;
while (currentV < opts.HighestVersion)
{
Log.DebugFormat("Auto-epoching out of order version: {0} < {1}",
currentV, opts.HighestVersion);
// Increment epoch if too small
currentV = currentV.IncrementEpoch();
}
if (!opts.HighestVersion.EpochEquals(currentV) &&
startV < opts.HighestVersion && opts.HighestVersion < currentV)
{
// New file, tell the Indexer to be careful
opts.Staged = true;
opts.StagingReason = $"Auto-epoching out of order version: {startV} < {opts.HighestVersion} < {currentV}";
}
json["version"] = currentV.ToString();
}
yield return(new Metadata(json));
}