public static Sitecore.Collections.HistoryEntryCollection getUniqueLatestVersionFromHistoryCollection(Sitecore.Collections.HistoryEntryCollection data)
{
Sitecore.Collections.HistoryEntryCollection hec = null;
if (data != null && data.Count > 0)
{
hec = new Sitecore.Collections.HistoryEntryCollection();
//This will find out unique items in history collection
var unique = data.DistinctBy(x => x.ItemId);
foreach (var item in unique)
{
//This will found those items with same ID in the original data collection
List <Sitecore.Data.Engines.HistoryEntry> sameItems = (from he in data
where he.ItemId == item.ItemId
select he).ToList <Sitecore.Data.Engines.HistoryEntry>();
//This will find out the latest version possible in the sameItems collection
Sitecore.Data.Engines.HistoryEntry historyEntry = sameItems.Aggregate((i1, i2) => i1.ItemVersion.Number > i2.ItemVersion.Number ? i1 : i2);
//Finally add the value to real history collection
if (historyEntry != null)
{
hec.Add(historyEntry);
}
}
}
return(hec);
}
public static Sitecore.Collections.HistoryEntryCollection getAllHistoryItems(string dbname, DateTime from, DateTime to, Sitecore.Data.Engines.HistoryAction ha)
{
Sitecore.Collections.HistoryEntryCollection hec = new Sitecore.Collections.HistoryEntryCollection();
var entries = HistoryManager.GetHistory(GetDatabase(dbname), from, to);
foreach (var item in entries)
{
if (item.Category == Sitecore.Data.Engines.HistoryCategory.Item && ha == item.Action)
{
hec.Add(item);
}
}
return(hec);
}