erlang - Muc Hooks からルーム名または件名を取得する

Question

ejabberd フックの 1 つから部屋の名前または件名を取得したい。以下のコードのようなメソッドがあり、そのメソッド内で部屋の名前または件名を取得したいと考えています。そのようなことは可能ですか？

muc_filter_message(Stanza, MUCState, RoomJID, FromJID, FromNick) ->
    PostUrl = gen_mod:get_module_opt(FromJID#jid.lserver, ?MODULE, post_url, fun(S) -> iolist_to_binary(S) end, list_to_binary("")),
    Token = gen_mod:get_module_opt(FromJID#jid.lserver, ?MODULE, auth_token, fun(S) -> iolist_to_binary(S) end, list_to_binary("")),
    Body = fxml:get_path_s(Stanza, [{elem, list_to_binary("body")}, cdata]),

    _LISTUSERS = lists:map(
        fun({_LJID, Info}) ->
            binary_to_list(Info#user.jid#jid.luser) ++ ".."
        end,
        dict:to_list(MUCState#state.users)
    ),
    ?DEBUG(" #########    GROUPCHAT _LISTUSERS = ~p~n  #######   ", [_LISTUSERS]),

    _AFILLIATIONS = lists:map(
        fun({{Uname, _Domain, _Res}, _Stuff}) ->
            binary_to_list(Uname) ++ ".."
        end,
        dict:to_list(MUCState#state.affiliations)
    ),
    ?DEBUG(" #########    GROUPCHAT _AFILLIATIONS = ~p~n  #######   ", [_AFILLIATIONS]),

    _OFFLINE = lists:subtract(_AFILLIATIONS, _LISTUSERS),
    ?DEBUG(" #########    GROUPCHAT _OFFLINE = ~p~n  #######   ", [_OFFLINE]),

    if
        Stanza /= "", length(_OFFLINE) > 0 ->
            Sep = "&",
            Post = [
                "type=groupchat", Sep,
                "to=", RoomJID#jid.luser, Sep,
                "from=", FromJID#jid.luser, Sep,
                "offline=", _OFFLINE, Sep,
                "nick=", FromNick, Sep,
                "body=", url_encode(binary_to_list(Body)), Sep,
                "access_token=", Token
            ],
            ?INFO_MSG("Sending post request to ~s with body \"~s\"", [PostUrl, Post]),
            httpc:request(post, {binary_to_list(PostUrl), [], "application/x-www-form-urlencoded", list_to_binary(Post)},[],[]),
            Stanza;
        true ->
            Stanza
    end.

ありがとう