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);
}
private static Item getHistoryItem(Sitecore.Data.Engines.HistoryEntry item, string dbname, int version, string language = "en", string path = "")
{
//If History entry item is null then return null
if (item == null || dbname == null)
{
return(null);
}
if (language != null && language.Length > 0)
{
//if language doesn't match then return null
if (!item.ItemLanguage.Name.Equals(language, StringComparison.CurrentCultureIgnoreCase))
{
return(null);
}
}
//if version doesn't match then return null
if (item.ItemVersion.Number != version)
{
return(null);
}
if (path != null && path.Length > 0)
{
string compPath = item.ItemPath + @"/";
//if path doesn't fall under given path which means location is not correct then return null
if (!compPath.Contains(path))
{
return(null);
}
}
return(GetItem(item.ItemId.Guid.ToString(), dbname, language, version));
}