offline_message_hook中给用户的路由消息

Question

我想建立一个客户支持聊天应用程序。有users和admin。在管理员下面有multiple sub-admins。最初，聊天只使用admin启动，但是如果管理员离线，我需要将消息路由到子管理员。

offline_message_hook钩子起作用。我将检查To是否是管理员，然后我需要将Packet路由到一个子管理员。如何将数据包路由/发送到offline_message_hook中的其他用户。简而言之，我如何从包中更改To，以便将数据包重新定向到新的子管理员？

以下是我尝试过的：-

offline_message_hook({_Action, #message{from = Peer, to = To} = Pkt} = Acc) ->
    ?INFO_MSG("Inside offline", []),
    ejabberd_router:route(From, To, Packet),
    ok.

我在用ejabberd 17.04.105。

更新

在听从user2610053的建议后，我做了这样的事情：-

-spec offline_message_hook({any(), message()}) -> {any(), message()}.
offline_message_hook({_Action, Msg} = Acc) ->
    ejabberd_router:route(xmpp:set_to(Msg, 'praful@localhost')),
    {routed, Msg}.

以下是错误：

15:13:12.291 [error] failed to route packet:
#message{id = <<"purple187f6502">>,type = chat,lang = <<"en">>,
         from = {jid,<<"praful2">>,<<"localhost">>,<<"Prafuls-MacBook-Pro">>,
                     <<"praful2">>,<<"localhost">>,<<"Prafuls-MacBook-Pro">>},
         to = praful@localhost,subject = [],
         body = [#text{lang = <<>>,data = <<"co=umon">>}],
         thread = undefined,
         sub_els = [{xmlel,<<"active">>,
                           [{<<"xmlns">>,
                             <<"http://jabber.org/protocol/chatstates">>}],
                           []}],
         meta = #{ip => {0,0,0,0,0,0,0,1}}}
Reason = {error,{{badrecord,jid},[{ejabberd_router,do_route,1,[{file,"src/ejabberd_router.erl"},{line,343}]},{ejabberd_router,route,1,[{file,"src/ejabberd_router.erl"},{line,87}]},{mod_sunshine,offline_message_hook,1,[{file,"src/mod_sunshine.erl"},{line,24}]},{ejabberd_hooks,safe_apply,4,[{file,"src/ejabberd_hooks.erl"},{line,380}]},{ejabberd_hooks,run_fold1,4,[{file,"src/ejabberd_hooks.erl"},{line,364}]},{ejabberd_sm,route,1,[{file,"src/ejabberd_sm.erl"},{line,138}]},{ejabberd_local,route,1,[{file,"src/ejabberd_local.erl"},{line,116}]},{ejabberd_router,do_route,1,[{file,"src/ejabberd_router.erl"},{line,348}]}]}}

存在用户praful@localhost。请告诉我到底出了什么问题？

Update2 -‘

在user_receive_packet数据包钩子中，在使用相同的ejabberd_router:route(xmpp:set_to(Packet, jid:decode("praful@localhost"))),函数时，它会抛出一个错误:-

Hook user_receive_packet crashed when running mod_sunshine:user_receive_packet/1:
** Reason = {error,function_clause,[{jid,decode,[{file,"src/jid.erl"},{line,132}],["praful@localhost"]},{mod_sunshine,user_receive_packet,[{file,"src/mod_sunshine.erl"},{line,29}],1},{ejabberd_hooks,safe_apply,[{file,"src/ejabberd_hooks.erl"},{line,380}],4},{ejabberd_hooks,run_fold1,[{file,"src/ejabberd_hooks.erl"},{line,364}],4},{ejabberd_c2s,process_info,[{file,"src/ejabberd_c2s.erl"},{line,231}],2},{ejabberd_hooks,safe_apply,[{file,"src/ejabberd_hooks.erl"},{line,380}],4},{ejabberd_hooks,run_fold1,[{file,"src/ejabberd_hooks.erl"},{line,364}],4},{xmpp_stream_in,handle_info,[{file,"src/xmpp_stream_in.erl"},{line,373}],2}]}

所以，我读到了关于function_clause的文章，但是我也不明白。这里到底出了什么问题？

Answer 1

我想你是在问至/2的事。下面是一个示例：

offline_message_hook({_Action, Msg} = Acc) ->
  SubAdmins = get_sub_admins(Msg#message.to),
  lists:foreach(
    fun(Admin) ->
      ejabberd_router:route(xmpp:set_to(Msg, Admin))
    end, Admins),
  {routed, Msg}.