Terms&Conditions fixes:

* adding hints (no-store, no-copy) on xmpp messages
* frontend will ignore any archived message

conversejs/custom/plugins/terms/index.js

@@ -36,6 +36,11 @@ converse.plugins.add('livechat-converse-terms', {
           console.error('Invalid x-livechat-terms type: ', type)
           return
         }
+        if (attrs.is_archived) {
+          // This should not happen, as we add some no-store hints. But, just in case.
+          console.info('Dropping an archived x-livechat-terms message')
+          return
+        }
         // console.info('Received a x-livechat-terms message', attrs)
         const options = {}
         options['x_livechat_terms_' + type] = attrs

prosody-modules/mod_muc_peertubelivechat_terms/mod_muc_peertubelivechat_terms.lua

@@ -32,8 +32,10 @@ local function create_terms_message(room, type, terms)
     id = id.medium()
   }, terms)
     :tag('x-livechat-terms', { type = type }):up() -- adding a custom tag to specify that it is a "terms" message, so that frontend can display it with a special template.
-    :tag("delay", { xmlns = "urn:xmpp:delay", from = from, stamp = datetime.datetime() }):up(); -- adding a delay to trick the moderation bot (see below)
+    :tag("delay", { xmlns = "urn:xmpp:delay", from = from, stamp = datetime.datetime() }):up() -- adding a delay to trick the moderation bot (see below)
-
+    :tag("no-copy", { xmlns = "urn:xmpp:hints" }):up()
+    :tag("no-store", { xmlns = "urn:xmpp:hints" }):up()
+    :tag("no-permanent-store", { xmlns = "urn:xmpp:hints" }):up();
   -- concerning the delay tag:
   -- We are sending message to rooms from non-existant occupants.
   -- If the message contains something that should be moderated by the livechat moderation bot,

support/documentation/content/en/technical/terms.md

@@ -25,6 +25,9 @@ Here is an example of sent messages:
   <x-livechat-terms type="global" />
   <delay xmlns="urn:xmpp:delay" stamp="2024-06-25T11:02:25Z" />
   <stanza-id by="8df24108-6e70-4fc8-b1cc-f2db7fcdd535@room.p1.localhost" xmlns="urn:xmpp:sid:0" id="InoL5fonvOoR8X9gOlAYsz_N" />
+  <no-copy xmlns='urn:xmpp:hints'/>
+  <no-store xmlns='urn:xmpp:hints'/>
+  <no-permanent-store xmlns='urn:xmpp:hints'/>
 </message>
 
 <message xmlns="jabber:client" id="_iRSEs061gi5GBjF7zGh7f-M" type="groupchat" to="root@p1.localhost/QH1H89H1" from="8df24108-6e70-4fc8-b1cc-f2db7fcdd535@room.p1.localhost/Peertube">
@@ -32,6 +35,9 @@ Here is an example of sent messages:
   <x-livechat-terms type="muc" />
   <delay xmlns="urn:xmpp:delay" stamp="2024-06-25T11:02:25Z" />
   <stanza-id by="8df24108-6e70-4fc8-b1cc-f2db7fcdd535@room.p1.localhost" xmlns="urn:xmpp:sid:0" id="InoL5fonvOoR8X9gOlAYsz_N" />
+  <no-copy xmlns='urn:xmpp:hints'/>
+  <no-store xmlns='urn:xmpp:hints'/>
+  <no-permanent-store xmlns='urn:xmpp:hints'/>
 </message>
 ```
 
@@ -47,6 +53,8 @@ We must do so, because without nickname, some XMPP clients won't show the messag
 We also add a `delay` tag, to trick the moderation bot (see comments in code).
 This also ensure clients will not drop the message because there is no occupant with this name.
 
+We also add some `urn:xmpp:hints` to avoid storing or copying these messages.
+
 When muc terms are updated, the new terms will be broadcasted.
 
 To avoid anyone spoofing terms & conditions, incoming message stanza are filtered, and any `x-livechat-terms` tag will be removed.