Terms&Conditions (#18) WIP:

* channel terms

prosody-modules/mod_muc_peertubelivechat_terms/README.md

@@ -29,6 +29,6 @@ The nickname that will be used by service messages.
 This module reserves the nickname, so than nobody can use it in MUC rooms
 (we don't want any user to spoof this nickname).
 
-### muc_terms
+### muc_terms_global
 
 The global terms.

prosody-modules/mod_muc_peertubelivechat_terms/mod_muc_peertubelivechat_terms.lua

@@ -7,30 +7,71 @@
 -- Please see the Peertube livechat plugin copyright information.
 -- https://livingston.frama.io/peertube-plugin-livechat/credits/
 --
+
+-- Exposed functions:
+-- get_muc_terms
+-- set_muc_terms
+
 local jid_escape = require "util.jid".escape;
 local jid_resource = require "util.jid".resource;
 local st = require "util.stanza";
 local id = require "util.id";
 
 local service_nickname = module:get_option_string("muc_terms_service_nickname", "Service");
-local global_terms = module:get_option_string("muc_terms", "");
+local global_terms = module:get_option_string("muc_terms_global", "");
+
+local function create_terms_message(room, type, terms)
+  local from = room.jid .. '/' .. jid_escape(service_nickname);
+  module:log("debug", "Creating %s terms message from %s (room %s)", type, from, room);
+  local msg = st.message({
+    type = "groupchat",
+    from = from,
+    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.
+
+  return msg;
+end
+
+-- MUC Getter/Setter
+function get_muc_terms(room)
+  return room._data.livechat_muc_terms or nil;
+end
+
+function set_muc_terms(room, terms)
+  terms = terms or nil;
+
+  if get_muc_terms(room) == terms then return false; end
+
+  room._data.livechat_muc_terms = terms;
+  if terms ~= nil then
+    -- we must send new terms to all occupants.
+    local msg = create_terms_message(room, "muc", terms);
+    module:log("debug", "Broadcasting terms message to room %s", room);
+    room:broadcast_message(msg);
+  end
+  return true;
+end
 
 -- send the terms when joining:
-function send_terms(event)
+local function send_terms(event)
   local origin = event.origin;
 	local room = event.room;
 	local occupant = event.occupant;
   if global_terms then
+    module:log("debug", "Sending global terms to %s", occupant.jid);
+    local msg = create_terms_message(room, "global", global_terms);
+    msg.attr.to = occupant.jid;
+    origin.send(msg);
+  end
+
+  local muc_terms = get_muc_terms(room);
+  if muc_terms then
     local from = room.jid .. '/' .. jid_escape(service_nickname);
-    module:log("debug", "Sending global terms to %s from %s (room %s)", occupant.jid, from, room);
-    local message = st.message({
-			type = "groupchat",
-			to = occupant.jid,
-			from = from,
-			id = id.medium()
-		}, global_terms)
-      :tag('x-livechat-terms', { type = "global" }):up(); -- adding a custom tag to specify that it is a "terms" message, so that frontend can display it with a special template.
-		origin.send(message);
+    module:log("debug", "Sending muc terms to %s", occupant.jid);
+    local msg = create_terms_message(room, "muc", muc_terms);
+    msg.attr.to = occupant.jid;
+    origin.send(msg);
   end
 end
 -- Note: we could do that on muc-occupant-joined or muc-occupant-session-new.
@@ -39,7 +80,7 @@ end
 module:hook("muc-occupant-session-new", send_terms);
 
 -- reserve the service_nickname:
-function enforce_nick_policy(event)
+local function enforce_nick_policy(event)
   local origin, stanza = event.origin, event.stanza;
   local requested_nick = jid_resource(stanza.attr.to);
   local room = event.room;