I was wondering if it's possible somehow to detect if an article or a page (or maybe generally content) was already viewed by a registered user. I am interested in this functionality because based on the fact if this content was already viewed I could manage the visibility of this content. I found a module that seems as it could help me but I am not sure, this module is called extended block visibility.
*Also I know that we can show blocks for specific roles in Drupal but I think this doesn't solves exactly my problem.
I would appreciate if you could give me some ideas or advices on my problem!