Does spark support working with xmpp-links? For example, if i push the link (xmpp:email@example.com), i want to chat window with this user will be opened.
No, sadly, it does not. In the past, I’ve had a quick look, but there’s a non-trivial problem where we’d have to configure the OS in such a way that it would use Spark for the xmpp links.
There is an old ticket related to this [SPARK-1446] Clicking on link from browser results in null person - IgniteRealtime JIRA