plugin XEP-0308: check message edit for room messages:

- Reference the stanza-id assigned by the MUC service when correcting.
- Ignore the edit (with a warning) if the original message has no usable id.

libervia/backend/plugins/plugin_xep_0308.py

@@ -293,6 +293,18 @@ class XEP_0308:
             store=not is_group_chat,
         )
 
+        ref_id = edited_history.stanza_id if is_group_chat else edited_history.origin_id
+        if not ref_id:
+            orig_data = edited_history.serialise()
+            orig_data["from"] = jid.JID(orig_data["from"])
+            orig_data["to"] = jid.JID(orig_data["to"])
+            log.warning(
+                f"Can't correct message {message_id}: the original message has no usable "
+                f"id (stanza_id={edited_history.stanza_id}, "
+                f"origin_id={edited_history.origin_id}), ignoring the edit."
+            )
+            return
+
         serialised = edited_history.serialise()
         serialised["uid"] = str(uuid.uuid4())
         serialised["from"] = client.jid
@@ -301,7 +313,7 @@ class XEP_0308:
 
         message_elt = client.generate_message_xml(serialised)["xml"]
         replace_elt = message_elt.addElement((NS_MESSAGE_CORRECT, "replace"))
-        replace_elt["id"] = edited_history.origin_id
+        replace_elt["id"] = ref_id
         self._h.add_hint_elements(message_elt, [self._h.HINT_STORE])
         client.send(message_elt)