Add links from Zotero item attachments into Org

[jbradberry]

I'm proposing to add functionality to allow the user to select a Zotero item (probably much like how it is currently done by org-zotxt-insert-reference-link), then select one of the attachment files from that item, and drop an Org-style link to that file into the buffer.

Some concerns or open questions:

• org-zotxt-insert-reference-link and the functions that it calls out to seem to allow for returning multiple Zotero items. It feels to me like it only makes sense in this context to consider one item and then one attachment from that item. I'd prefer to reuse functionality, but it seems a bit weird to take that to the natural conclusion of iteratively selecting multiple attachments from multiple items.
• Should this make use of Org-mode's attachment system, or at least provide a way to choose to do so? And if so, allow for a way to force a method different from org-attach-method? And what if that method is 'move', potentially causing problems with Zotero?
  • Since there are a few ways that org-attach-attach can store the link to the new attachment (including not doing so at all?), does it make sense to insert the link immediately, or should the user need to do it explicitly using C-c C-l?

Thoughts, @egh ?

[jbradberry]

My personal inclination for these is:

• ignore all selected Zotero items after the first, but do use all of the relevant utility functions
• yes, use Org attach, and provide a zotxt-emacs config option (org-zotxt-attach-method, with choices 'cp', 'ln', and 'lns')