function filter_stanza()

in resources/prosody-plugins/mod_muc_lobby_rooms.lua [107:167]

• 49 lines of code
• 12 McCabe index (conditional complexity)

function filter_stanza(stanza)
    if not stanza.attr or not stanza.attr.from or not main_muc_service or not lobby_muc_service then
        return stanza;
    end
    
    local node, from_domain = jid_split(stanza.attr.from);

    if from_domain == lobby_muc_component_config then
        if stanza.name == 'presence' then
            local muc_x = stanza:get_child('x', MUC_NS..'#user');
            if not muc_x or presence_check_status(muc_x, '110') then
                return stanza;
            end

            local lobby_room_jid = jid_bare(stanza.attr.from);
            local lobby_room = lobby_muc_service.get_room_from_jid(lobby_room_jid);
            if not lobby_room then
                module:log('warn', 'No lobby room found %s', lobby_room_jid);
                return stanza;
            end

            
            
            local room = main_muc_service.get_room_from_jid(jid_bare(node .. '@' .. main_muc_component_config));
            local item = muc_x:get_child('item');
            if not room
                or stanza.attr.type == 'unavailable'
                or (room.get_affiliation(room, stanza.attr.to) == 'owner'
                    and room.get_affiliation(room, item.attr.jid) ~= 'owner') then
                return stanza;
            end

            local is_to_moderator = lobby_room:get_affiliation(stanza.attr.to) == 'owner';
            local from_occupant = lobby_room:get_occupant_by_nick(stanza.attr.from);
            if not from_occupant then
                if is_to_moderator then
                    return stanza;
                end

                module:log('warn', 'No lobby occupant found %s', stanza.attr.from);
                return nil;
            end

            local from_real_jid;
            for real_jid in from_occupant:each_session() do
                from_real_jid = real_jid;
            end

            if is_to_moderator and lobby_room:get_affiliation(from_real_jid) ~= 'owner' then
                return stanza;
            end
        elseif stanza.name == 'iq' and stanza:get_child('query', DISCO_INFO_NS) then
            
            return stanza;
        end

        return nil;
    else
        return stanza;
    end
end