Add tokens for item data

While I see the benefit of this, this patch is not acceptable. You're re-introducing deprecated code. Also, you are not checking, whether 'data' itself is traversable.

This "if (is_array($var) || ($var instanceof Traversable)) {" might do the trick.

Hmm,

I'm still hesitant about this. I simply don't know well enough, how tokening things works in Drupal. In worst case, we could break a lot of peoples installation, because Drupal tries to tokenize things with unexpected results.

So we need tests for this, to check what happens when you store weired things in 'data' and Drupal has to manage.

The patch itself seems a good idea though, although you are still not checking whether 'data' is traversable. That is the "$metadata" variable in your code. You just assume you can call "foreach" on it.

TL;DR: this needs tests.

Also, it might be a good idea to cast things to "string" before handing them over to token, and wrap things in try / catch, just in case.

Minor fixes added. If it goes green, I'll commit it.

Committed. Thanks!