From cd68dfa58339b3107a6ad922866782c994be59ed Mon Sep 17 00:00:00 2001
From: Alexander PapaTutuWawa <papatutuwawa@polynom.me>
Date: Sat, 20 Feb 2021 20:33:46 +0100
Subject: [PATCH] mod_mix: Various things

- Start working on MIX Anon
- Fix a TODO
---
 mod_mix/mod_mix.lua | 66 ++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 56 insertions(+), 10 deletions(-)

diff --git a/mod_mix/mod_mix.lua b/mod_mix/mod_mix.lua
index a36fec4..bdf7e73 100644
--- a/mod_mix/mod_mix.lua
+++ b/mod_mix/mod_mix.lua
@@ -1,6 +1,5 @@
 -- Big TODOlist
 -- TODO: Channel:is_subscribed could be replaced by get_pep_service(...):get_subscription
--- TODO: All channels[i] can probably safely be replaced with channel.
 
 local host = module:get_host();
 if module:get_host_type() ~= "component" then
@@ -24,6 +23,7 @@ Participant = mixlib.Participant;
 
 -- XML namespaces
 local mix_core_xmlns = "urn:xmpp:mix:core:1";
+local mix_anon_xmlns = "urn:xmpp:mix:anon:0";
 --local mix_admin_xmlns = "urn:xmpp:mix:admin:0";
 local mix_node_messages = "urn:xmpp:mix:nodes:messages";
 local mix_node_participants = "urn:xmpp:mix:nodes:participants";
@@ -44,13 +44,23 @@ local default_channel_description = module:get_option("default_description", "A
 local default_channel_name = module:get_option("default_name", "MIX channel");
 local restrict_channel_creation = module:get_option("restrict_local_channels", "local");
 
--- MAM stuff
+-- Dataforms
+-- MAM
 local mam_query_form = dataforms.new({
     { name = "FORM_TYPE", type = "hidden", value = mam_xmlns },
     { name = "with", type = "jid-single" },
     { name = "start", type = "text-single" },
     { name = "end", type = "text-single" },
 });
+-- MIX Anon
+local mix_anon_form = dataforms.new({
+    { name = "FORM_TYPE", type = "hidden", value = mix_anon_xmlns },
+    { name = "JID Visibility", type = "text-single" },
+    { name = "Private Messages", type = "text-single" },
+    { name = "Presence", type = "text-single" },
+    { name = "vCard", type = "text-single" },
+});
+
 
 -- MIX-ADMIN stuff
 --[[
@@ -358,11 +368,11 @@ module:hook("iq-set/bare/"..mix_core_xmlns..":leave", function(event)
         srv:remove_subscription(node, true, from);
         module:log("debug", "Unsubscribed %s from %s on %s", from, node, channel.jid);
     end
-    channels[i].subscriptions[from] = nil;
+    channel.subscriptions[from] = nil;
     -- Retracting the participation
     srv:retract("urn:xmpp:mix:nodes:participants", true, channel:get_spid(from), true);
     -- Removing the user
-    table.remove(channels[i].participants, j);
+    table.remove(channel.participants, j);
     channel:save_state();
 
     origin.send(st.reply(stanza):tag("leave", { xmlns = mix_core_xmlns }));
@@ -430,14 +440,50 @@ module:hook("iq-set/bare/"..mix_core_xmlns..":join", function(event)
         return true;
     end
 
-    local participant = Participant:new(jid.bare(from), nick);
-    channels[i].subscriptions[from] = nodes;
-    table.insert(channels[i].participants, participant)
-    channels[i]:set_spid(jid.bare(stanza.attr.from), spid);
+    -- TODO: Make the default configurable
+    local jid_visibility = "never"; -- default
+    local allow_pms = "allow";
+    local allow_vcards = "block";
+    local share_presence = "share";
+    local x = join:get_child("x", "jabber:x:data");
+    if x ~= nil then
+        -- TODO: Rethink naming
+        -- TODO: Error handling?
+        local form, err = mix_anon_form:data(x);
+        if form["JID Visibility"] then
+            jid_visibility = form["JID Visibility"];
+        end
+        if form["Private Messages"] then
+            allow_pms = form["Private Messages"];
+        end
+        if form["Presence"] then
+            share_presence = form["Presence"];
+        end
+        if form["vCard"] then
+            allow_vcards = form["vCard"];
+        end
+    end
+
+    local participant = Participant:new(jid.bare(from), nick, jid_visibility, allow_pms, share_presence, allow_vcards);
+    channel.subscriptions[from] = nodes;
+    table.insert(channel.participants, participant)
+    channel:set_spid(jid.bare(stanza.attr.from), spid);
     publish_participant(srv, channel, spid, participant);
-    channels[i]:save_state();
+    channel:save_state();
 
     reply:add_child(nick);
+    reply:tag("x", { xmlns = "jabber:x:data", type = "result" })
+        :tag("field", { var = "FORM_TYPE", type = "hidden" })
+            :tag("value"):text(mix_anon_xmlns):up():up()
+        :tag("field", { var = "JID Visibility"})
+            :tag("value"):text(jid_visibility):up():up()
+        :tag("field", { var = "Private Messages"})
+            :tag("value"):text(allow_pms):up():up()
+        :tag("field", { var = "Presence"})
+            :tag("value"):text(share_presence):up():up()
+        :tag("field", { var = "vCard"})
+            :tag("value"):text(allow_vcards):up():up();
+
     origin.send(reply);
     return true
 end);
@@ -468,7 +514,7 @@ module:hook("iq-set/bare/"..mix_core_xmlns..":setnick", function(event)
     end
 
     -- Change the nick
-    channels[i].participants[j].nick = nick:get_text();
+    channel.participants[j].nick = nick:get_text();
     -- Inform all other members
     local srv = pep.get_pep_service(channel.jid);
     --local participant = channel.participants[participant_index];