tokio-xmpp: @id wasn't correctly added to every stanza

This commit moves the code adding @id to AsyncClient and SimpleClient,
instead of on the lower level send_stanza helper, which seemed to only
be used internally.

Support is also added for Component.

This removes the addition of @id on elements like <auth/> or <bind/>,
which probably weren't required anyway?

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

tokio-xmpp/src/component/mod.rs

@@ -12,6 +12,7 @@ use super::happy_eyeballs::connect_to_host;
 use super::xmpp_codec::Packet;
 use super::xmpp_stream;
 use super::Error;
+use crate::xmpp_stream::make_id;
 
 mod auth;
 
@@ -53,7 +54,11 @@ impl Component {
 
     /// Send stanza
     pub async fn send_stanza(&mut self, stanza: Element) -> Result<(), Error> {
-        self.send(stanza).await
+        let mut el: Element = stanza;
+        if el.attr("id").is_none() {
+            el.set_attr("id", make_id());
+        }
+        self.send(el).await
     }
 
     /// End connection