mod_c2s: Add event just before closing as session To allow modules to do things just before the session is closed. The '(pre-)resource-unbind' events are fired after the stream is closed, leaving no way to send something.

author: Kim Alvefur <zash@zash.se>
date: Wed, 01 Dec 2021 15:06:48 +0100
parent: 11899:6d06068363aa
child: 12071:85c8fcb4192e
--- a/plugins/mod_c2s.lua	Tue Nov 30 22:04:00 2021 +0100
+++ b/plugins/mod_c2s.lua	Wed Dec 01 15:06:48 2021 +0100
@@ -190,6 +190,9 @@
 		if session.notopen then
 			session:open_stream();
 		end
+		local close_event_payload = { session = session, reason = reason };
+		module:context(session.host):fire_event("pre-session-close", close_event_payload);
+		reason = close_event_payload.reason;
 		if reason then -- nil == no err, initiated by us, false == initiated by client
 			local stream_error = st.stanza("stream:error");
 			if type(reason) == "string" then -- assume stream error