Hi Devs,

 some users reported a problem to me concerning the Publication Workflow 
Application and the nested pages feature.
The problem is as follows:

 In their old instance (some 6.4.x) they had a draft space and a public space 
and workflows attaching each page in the draft space with a page in the public 
space in an 1:1 manner, like:

  Draft.WebHome --> Public.WebHome
  Draft.PageA   --> Public.PageA
  Draft.PageB   --> Public.PageB

Now if a link in, say, PageA in the Draft space points to another page, e.g. 
PageB, this is done via a relative link like [[link text>>doc:PageB]]
After publishing PageA, the link of the published variant points to the 
published variant of PageB (and not the variant in the Draft space), which is 
the desired effect from the users point of view.

Now after migration to 9.10 the situation is as follows:

  Draft.WebHome        --> Public.WebHome
  Draft.PageA.WebHome  --> Public.PageA.WebHome
  Draft.PageB.WebHome  --> Public.PageB.WebHome

Now a link to PageB in PageA looks like: [[link text>>doc:Draft.PageB.WebHome]] 
because both pages are no longer in the same space, but each in their own space.
Publishing the draft makes the link in the published variant point back to the 
Draft space, of course. However this is different from the behavior before 
nested pages and the users experience this as a bug.

A manual solution would be to edit all pages and make the links point to the 
published variant of the pages. However this is not only a cumbersome and error 
prone task, but also the users are used to the "automatic" link conversion that 
made links in the published variant point to published pages and are wont to 
continue setting links to pages in the draft space, expecting them to point to 
the "right place" after publishing.
The fact that now titles are used throughout in the navigation tree, and the 
titles of the draft and published variant are usually the same and thus 
indistinguishable complicates the problem even more.

To fix this I could write a separate extension that listens to Publish events 
send from the Workflow extension, and which converts the links in the published 
variant before it gets saved.
However I remember that I once experienced strange issues where the events were 
sometimes not send to the event listener in question, probably due some class 
loader issues or the like.
(I only experienced these problems in a production instance and was not able to 
hunt them down in a development instance.)

Also I cannot think of a use case where users want to link from a published 
variant back into the draft space (except for pointing to the draft version of 
the page itself, which is provided by the panel, however.)

Thus I would like to implement the link transformation in the extension itself. 
If a link in a page points to a page in the draft space of that workflow, I 
would change that link in the published variant to point to the corresponding 
published variant of the link target.
I could add a checkbox to the workflow class so people can switch of that link 
transformation if they do not want it.


What do you think? Are there any objections to implementing such a feature? Or 
do you have different ideas how to solve the problem?

Best Regards
Clemens

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