public static XDoc RestoreDeletedPage(uint pageid, Title newRootPath, string revertReason)
{
//Retrieve initial revisions of pages to restore
//First item in the list is the page that initiated the transaction.
//Talk pages are included.
uint initialDeleteTranId = 0;
IList <ArchiveBE> pagesToRestore = DbUtils.CurrentSession.Archive_GetPagesInTransaction(pageid, out initialDeleteTranId);
TransactionBE initialDeleteTrans = DbUtils.CurrentSession.Transactions_GetById(initialDeleteTranId);
//Validate deleted page + transaction
if (pagesToRestore.Count == 0)
{
throw new PageArchiveLogicNotFoundException(pageid);
}
if (initialDeleteTrans == null)
{
throw new PageArchiveBadTransactionFatalException(initialDeleteTranId, pageid);
}
//TODO MaxM: move the above gathering of what pages to restore to another method. Make this private.
//Look for title conflicts
List <Title> titles = new List <Title>();
List <ulong> pageidsToRestore = new List <ulong>();
Dictionary <ulong, PageBE> restoredPagesById = null;
DateTime utcTimestamp = DateTime.UtcNow;
foreach (ArchiveBE p in pagesToRestore)
{
Title t = p.Title;
if (newRootPath != null)
{
t = BuildNewTitlesForMovedPage(pagesToRestore[0].Title, p.Title, newRootPath);
}
titles.Add(t);
pageidsToRestore.Add(p.LastPageId);
}
IList <PageBE> currentPages = DbUtils.CurrentSession.Pages_GetByTitles(titles.ToArray());
if (currentPages.Count > 0)
{
//Remove all conflicting redirect pages from target of restore if all conflicting pages are redirects
List <PageBE> conflictingRedirects = new List <PageBE>();
foreach (PageBE p in currentPages)
{
if (p.IsRedirect)
{
conflictingRedirects.Add(p);
}
}
if (currentPages.Count == conflictingRedirects.Count && conflictingRedirects.Count > 0)
{
//Remove existing redirects and refresh the conflicting pages list
PageBL.DeletePages(conflictingRedirects.ToArray(), utcTimestamp, 0, false);
currentPages = DbUtils.CurrentSession.Pages_GetByTitles(titles.ToArray());
}
}
if (currentPages.Count > 0)
{
//return the name(s) of the conflicting page title(s)
StringBuilder conflictTitles = new StringBuilder();
foreach (PageBE p in currentPages)
{
if (conflictTitles.Length > 0)
{
conflictTitles.Append(", ");
}
conflictTitles.Append(p.Title.AsPrefixedUserFriendlyPath());
}
throw new PageArchiveRestoreNamedPageConflictException(conflictTitles.ToString());
}
//Gather revisions for all pages to be restored.
//Revisions are sorted by timestamp: oldest first.
Dictionary <ulong, IList <ArchiveBE> > revisionsByPageId = DbUtils.CurrentSession.Archive_GetRevisionsByPageIds(pageidsToRestore);
uint restoredPageTranId = 0;
try {
TransactionBE newTrans = new TransactionBE();
newTrans.UserId = DekiContext.Current.User.ID;
newTrans.PageId = pageid;
newTrans.Title = pagesToRestore[0].Title;
newTrans.Type = RC.PAGERESTORED;
newTrans.TimeStamp = DateTime.UtcNow;
restoredPageTranId = DbUtils.CurrentSession.Transactions_Insert(newTrans);
//Pages must be restored in correct order (alphabetical ensures parent pages are restored before children).
//pagesToRestore must be in alphabetical title order
bool minorChange = false;
foreach (ArchiveBE pageToRestore in pagesToRestore)
{
IList <ArchiveBE> revisions = null;
if (revisionsByPageId.TryGetValue(pageToRestore.LastPageId, out revisions))
{
//Optionally restore page to different title
Title restoreToTitle = pageToRestore.Title;
if (newRootPath != null)
{
restoreToTitle = BuildNewTitlesForMovedPage(pagesToRestore[0].Title, pageToRestore.Title, newRootPath);
}
RestorePageRevisionsForPage(revisions.ToArray(), restoreToTitle, restoredPageTranId, minorChange, utcTimestamp);
DbUtils.CurrentSession.Archive_Delete(revisions.Select(e => e.Id).ToList());
}
minorChange = true;
}
//Retrieve the restored pages
restoredPagesById = PageBL.GetPagesByIdsPreserveOrder(pageidsToRestore).AsHash(e => e.ID);
// Restore attachments
IList <ResourceBE> attachmentsToRestore = ResourceBL.Instance.GetResourcesByChangeSet(initialDeleteTrans.Id, ResourceBE.Type.FILE);
foreach (ResourceBE at in attachmentsToRestore)
{
PageBE restoredPage;
if (restoredPagesById.TryGetValue(at.ParentPageId.Value, out restoredPage))
{
AttachmentBL.Instance.RestoreAttachment(at, restoredPage, utcTimestamp, restoredPageTranId);
}
}
//Update the old transaction as reverted
initialDeleteTrans.Reverted = true;
initialDeleteTrans.RevertTimeStamp = utcTimestamp;
initialDeleteTrans.RevertUserId = DekiContext.Current.User.ID;
initialDeleteTrans.RevertReason = revertReason;
DbUtils.CurrentSession.Transactions_Update(initialDeleteTrans);
} catch (Exception) {
DbUtils.CurrentSession.Transactions_Delete(restoredPageTranId);
throw;
}
//Build restore summary
XDoc ret = new XDoc("pages.restored");
foreach (ulong restoredPageId in pageidsToRestore)
{
PageBE restoredPage = null;
if (restoredPagesById.TryGetValue((uint)restoredPageId, out restoredPage))
{
ret.Add(PageBL.GetPageXml(restoredPage, string.Empty));
}
}
return(ret);
}