Where is FlattenedHierarchyItem class?

I'd use linq to do this  e.g. http://stackoverflow.com/questions/1938409/linq-how-to-convert-the-nested-hierarchical-object-to-flatten-object

I was looking to take two lists consisting of FlattenedHierarchyItems and merging them together.  I had intended to use the $core_v2_utility.FlattenHierarchy to flatten both the lists before passing them to a custom widget extension to merge the two lists together.  Is this possible or would I need to recreate the functionality for "flattening" the hierarchy on the back end as suggested above?

Hi sthaynes,

I'm afraid that method doesn't accomplish what you're looking for. I believe this is why Alex Crome recommended Ling as an alternative. The FlattenHierarchy function is a very specialized method for a particular use case, Wiki table of contents. I believe Alex's suggestion is better in most general cases.

Regards,

Zac Elsik

Actually, I am working with the wiki table of contents.  I am looking for a way to merge toc's from two different wiki's into one toc.  Do I really need to recreate the flattened hierarchy or is this possible?

It is not clear to me why I have to re-invent the wheel in order to accomplish the merging of two wiki toc's.  I was hoping that there was another way to merge the two lists.  As it stands this question has not been answered...

If the goal is a single Hierarchal list, why use 2 Wikis at all?  If you use 1 Wiki then you do not need to customize anything

Also I am not sure why you need to access that item in code at all.  Why not just get the pages for both wikis and merge them into a single list and pass the merged list in like the existing toc (I believe this can all be done in the widget without custom code)?

Thank you Patrick for responding.  The use of two wiki's has to do with making select information available to a certain group in one wiki and making all of the information from both wiki's available to another group that maintains the content for both.  The goal is to make it easier for the maintainence team to make changes in one place.  It's a permissions thing and is a bit complex.  I have already tried to do the merge without custom code, i.e. velocity and jquery, but the problem comes in when there are identical pages in both the wiki toc's.  If a current page is selected/expanded, I have to traverse the tree and make sure I merge the children and handle all duplicates from the top down.  Not sure if I explained that right but I have tried what you suggested above and it is very messy and hard to do when working with hierarchical structures.  Do you have any other suggestions?

I attached a sample widget to get you started.... it combines 2 page sets into the flattened hierarchy.   You will have to fix the javascript to account for multiple wikis so that all the collapsing works.  Its also hard coded to 2 wiki Ids.

That being said.... this isn't much different than putting 2 TOC widgets on a page.

Patrick thanks again.  I already tried something similar and I am running into a problem with duplicate or identical pages and the current selected page.  Your code did give me another idea but it still does not address the issue with identical pages.  That is where I am getting stuck.  Here is an example:

It looks like this

---------------------

Page 1

Page 2

Page 3 (resides in wiki 1)

   Page Child 1 (wiki 1)

Page 3 (resides in wiki 2)

   Page Child 1 (wiki 2)

       Page Child 1 Child (selected, wiki 2)

Page 4

I need to merge both Page 3 and their kids into 1.

I want this:

---------------

Page 1

Page 2

Page 3 (resides in wiki 1)

   Page Child 1

       Page Child 1 Child (selected, wiki 2)

Page 4

Thanks Patrick.  I decided to develop some custom code to handle duplicate pages based on Title from the back end and it seems to be doing exactly what I need.  Again, thank you for your suggestions.