| 1 |
|
%%%---------------------------------------------------------------------- |
| 2 |
|
%%% File : mongoose_packet_handler.erl |
| 3 |
|
%%% Author : Piotr Nosek <piotr.nosek@erlang-solutions.com> |
| 4 |
|
%%% Purpose : Packet handler behaviour |
| 5 |
|
%%% Created : 24 Jan 2017 |
| 6 |
|
%%%---------------------------------------------------------------------- |
| 7 |
|
|
| 8 |
|
-module(mongoose_packet_handler). |
| 9 |
|
-author('piotr.nosek@erlang-solutions.com'). |
| 10 |
|
|
| 11 |
|
-record(packet_handler, { |
| 12 |
|
handler :: process_packet(), |
| 13 |
|
extra :: extra() |
| 14 |
|
}). |
| 15 |
|
-type extra() :: map(). |
| 16 |
|
-type t() :: #packet_handler{}. |
| 17 |
|
-export_type([t/0]). |
| 18 |
|
|
| 19 |
|
-define(ARGS, Acc :: mongoose_acc:t(), |
| 20 |
|
From :: jid:jid(), |
| 21 |
|
To :: jid:jid(), |
| 22 |
|
El :: exml:element(), |
| 23 |
|
Extra :: extra()). |
| 24 |
|
-type process_packet() :: fun((?ARGS) -> mongoose_acc:t()). |
| 25 |
|
-callback process_packet(?ARGS) -> mongoose_acc:t(). |
| 26 |
|
|
| 27 |
|
%%---------------------------------------------------------------------- |
| 28 |
|
%% API |
| 29 |
|
%%---------------------------------------------------------------------- |
| 30 |
|
|
| 31 |
|
-export([new/1, new/2, process/5, add_extra/2]). |
| 32 |
|
%% Getters |
| 33 |
|
-export([module/1, extra/1]). |
| 34 |
|
|
| 35 |
|
-spec new(Module :: module()) -> t(). |
| 36 |
|
new(Module) -> |
| 37 |
132 |
new(Module, #{}). |
| 38 |
|
|
| 39 |
|
-spec new(Module :: module(), Extra :: extra()) -> t(). |
| 40 |
|
new(Module, Extra) when is_atom(Module), is_map(Extra) -> |
| 41 |
690 |
#packet_handler{handler = fun Module:process_packet/5, extra = Extra }. |
| 42 |
|
|
| 43 |
|
-spec process(Handler :: t(), |
| 44 |
|
Acc :: mongoose_acc:t(), |
| 45 |
|
From ::jid:jid(), |
| 46 |
|
To ::jid:jid(), |
| 47 |
|
El :: exml:element()) -> mongoose_acc:t(). |
| 48 |
|
process(#packet_handler{handler = ProcessPacket, extra = Extra }, Acc, From, To, El) -> |
| 49 |
49804 |
ProcessPacket(Acc, From, To, El, Extra). |
| 50 |
|
|
| 51 |
|
module(#packet_handler{handler = ProcessPacket }) -> |
| 52 |
1 |
{_, Module} = erlang:fun_info(ProcessPacket, module), |
| 53 |
1 |
Module. |
| 54 |
|
|
| 55 |
|
extra(#packet_handler{ extra = Extra }) -> |
| 56 |
1 |
Extra. |
| 57 |
|
|
| 58 |
|
add_extra(#packet_handler{ extra = OldExtra } = Handler, Extra) -> |
| 59 |
|
%% KV pairs from the OldExtra map will remain unchanged, only |
| 60 |
|
%% the new keys from Extra map will be added to the NewExtra map |
| 61 |
599 |
NewExtra = maps:merge(Extra, OldExtra), |
| 62 |
599 |
Handler#packet_handler{extra = NewExtra}. |