Question: Autocomplete in Shortcode possible?

Hi All,

I'm trying to strengthen the connections between pages on my Grav-site and have different ideas on how to realise it. One option would be to use internal links - and someone pointed me to Shortcodes.

Would the folliwing be possible, in for instance a shortcode-based plugin for a separate code:

1. User is on Admin site, edits a page/post. Adds the shortcode `[intlink][/intlink]`.
2. When typing inside the code `[intlink] > ....` - the editor autocompletes the text and provides a dropdown with links of already existing pages across the grav site. _Similar to what happens when you type `#` #link in the github editor, it will provide links to other Issues._
3. Lastly, on processing, this gets converted into a link to that specific page.

Would this be possible?
(I think the autocompletion part is key to making it easy for the users, in order to creating those links in the content.)
And a similar use-case pops when thinking about developing a `[hashtag][/hashtag]` code.