XF 2.2 Renew unfurl?


Well-known member
Using a seo-tool to have pictures for threads for twitter, facebook ...

Thread one, no picture now
Thread two with post with link to thread one. Link has no picture.
Add a picture for thread one
Edit post in thread 2, delete the tags for unfurl, save. Now we have a link with picture.

My question:
I do a new add-on walking through all post and do what?

Which function we have to start checking the links inside posts and reload the link and showing the picture inside the unfurl link.
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