Move XMPP contacts exchange to background job

app/jobs/exchange_xmpp_contacts_job.rb

@@ -0,0 +1,18 @@
+class ExchangeXmppContactsJob < ApplicationJob
+  queue_as :default
+
+  def perform(inviter, username, domain)
+    ejabberd = EjabberdApiClient.new
+
+    ejabberd.add_rosteritem({
+      "localuser": username, "localhost": domain,
+      "user": inviter.cn, "host": inviter.ou,
+      "nick": inviter.cn, "group": "Friends", "subs": "both"
+    })
+    ejabberd.add_rosteritem({
+      "localuser": inviter.cn, "localhost": inviter.ou,
+      "user": username, "host": domain,
+      "nick": username, "group": "Friends", "subs": "both"
+    })
+  end
+end