private static void ProcessEntry(XmlWriter writer, IMergeEventListener eventListener, IMergeStrategy mergingStrategy,
XmlNode ancestorDom, HashSet <string> processedIds,
XmlNode sourceEntry, string sourceLabel, string sourcePath,
IDictionary <string, XmlNode> otherIdNodeIndex, string otherLabel, string otherPath)
{
var id = LiftUtils.GetId(sourceEntry);
if (processedIds.Contains(id))
{
return; // Already handled the id.
}
XmlNode otherEntry;
var commonEntry = FindEntry(ancestorDom, id);
if (!otherIdNodeIndex.TryGetValue(id, out otherEntry))
{
// It is in source, but not in target, so it clearly has been deleted by target (new style deletion).
if (LiftUtils.GetIsMarkedAsDeleted(sourceEntry))
{
if (!LiftUtils.GetIsMarkedAsDeleted(commonEntry))
{
// source and target both deleted but in different ways, so make deletion change report.
// There is no need to write anything.
eventListener.ChangeOccurred(new XmlDeletionChangeReport(sourcePath, commonEntry, sourceEntry));
}
//else
//{
// // Make it go away without fanfare by doing nothing to writer, since target actually removed the dead entry.
//}
processedIds.Add(id);
return;
}
if (commonEntry == null)
{
// source added it
eventListener.ChangeOccurred(new XmlAdditionChangeReport(sourcePath, sourceEntry));
writer.WriteNode(sourceEntry.CreateNavigator(), false);
}
else
{
if (AreTheSame(sourceEntry, commonEntry))
{
// target's deletion wins with a plain vanilla deletion report.
eventListener.ChangeOccurred(new XmlDeletionChangeReport(sourcePath, commonEntry, otherEntry));
}
else
{
// source wins over target's new style deletion on the least loss priciple.
// Add an edit vs remove conflict report.
eventListener.ConflictOccurred(new RemovedVsEditedElementConflict("entry", sourceEntry, otherEntry, commonEntry, new MergeSituation(sourcePath, sourceLabel, "", otherLabel, "", MergeOrder.ConflictHandlingModeChoices.WeWin), null, sourceLabel));
writer.WriteNode(sourceEntry.CreateNavigator(), false);
}
processedIds.Add(id);
return;
}
}
else if (AreTheSame(sourceEntry, otherEntry))
{
//unchanged or both made same change
writer.WriteNode(sourceEntry.CreateNavigator(), false);
}
else if (LiftUtils.GetIsMarkedAsDeleted(otherEntry))
{
// source edited, target deleted (old style deletion using dateDeleted attr).
eventListener.ConflictOccurred(new RemovedVsEditedElementConflict("entry", sourceEntry, otherEntry, commonEntry, new MergeSituation(sourcePath, sourceLabel, "", otherLabel, "", MergeOrder.ConflictHandlingModeChoices.WeWin), null, sourceLabel));
}
else if (LiftUtils.GetIsMarkedAsDeleted(sourceEntry))
{
// source deleted (old style), but target edited.
// target wins with the least loss principle.
// But generate a conflict report.
eventListener.ConflictOccurred(new RemovedVsEditedElementConflict("entry", otherEntry, sourceEntry, commonEntry, new MergeSituation(otherPath, otherLabel, "", sourceLabel, "", MergeOrder.ConflictHandlingModeChoices.TheyWin), null, sourceLabel));
writer.WriteNode(otherEntry.CreateNavigator(), false);
}
else
{
// One or both of them edited it, so merge the hard way.
using (var reader = XmlReader.Create(new StringReader(
mergingStrategy.MakeMergedEntry(eventListener, sourceEntry, otherEntry, commonEntry)
)))
{
writer.WriteNode(reader, false);
}
}
processedIds.Add(id);
}
