138 lines
4.4 KiB
Erlang
138 lines
4.4 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : mod_vcard_xupdate.erl
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%%% Author : Igor Goryachev <igor@goryachev.org>
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%%% Purpose : Add avatar hash in presence on behalf of client (XEP-0153)
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%%% Created : 9 Mar 2007 by Igor Goryachev <igor@goryachev.org>
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%%%----------------------------------------------------------------------
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-module(mod_vcard_xupdate).
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-behaviour(gen_mod).
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%% gen_mod callbacks
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-export([start/2, stop/1]).
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-export([update_presence/3, vcard_set/3, export/1,
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import/1, import/3, mod_opt_type/1]).
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-include("ejabberd.hrl").
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-include("logger.hrl").
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-include("mod_vcard_xupdate.hrl").
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-include("jlib.hrl").
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-callback init(binary(), gen_mod:opts()) -> any().
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-callback import(binary(), #vcard_xupdate{}) -> ok | pass.
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-callback add_xupdate(binary(), binary(), binary()) -> {atomic, any()}.
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-callback get_xupdate(binary(), binary()) -> binary() | undefined.
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-callback remove_xupdate(binary(), binary()) -> {atomic, any()}.
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%%====================================================================
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%% gen_mod callbacks
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%%====================================================================
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start(Host, Opts) ->
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Mod = gen_mod:db_mod(Host, Opts, ?MODULE),
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Mod:init(Host, Opts),
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ejabberd_hooks:add(c2s_update_presence, Host, ?MODULE,
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update_presence, 100),
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ejabberd_hooks:add(vcard_set, Host, ?MODULE, vcard_set,
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100),
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ok.
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stop(Host) ->
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ejabberd_hooks:delete(c2s_update_presence, Host,
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?MODULE, update_presence, 100),
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ejabberd_hooks:delete(vcard_set, Host, ?MODULE,
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vcard_set, 100),
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ok.
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%%====================================================================
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%% Hooks
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%%====================================================================
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update_presence(#xmlel{name = <<"presence">>, attrs = Attrs} = Packet,
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User, Host) ->
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case fxml:get_attr_s(<<"type">>, Attrs) of
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<<>> -> presence_with_xupdate(Packet, User, Host);
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_ -> Packet
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end;
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update_presence(Packet, _User, _Host) -> Packet.
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vcard_set(LUser, LServer, VCARD) ->
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US = {LUser, LServer},
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case fxml:get_path_s(VCARD,
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[{elem, <<"PHOTO">>}, {elem, <<"BINVAL">>}, cdata])
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of
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<<>> -> remove_xupdate(LUser, LServer);
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BinVal ->
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add_xupdate(LUser, LServer,
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p1_sha:sha(jlib:decode_base64(BinVal)))
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end,
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ejabberd_sm:force_update_presence(US).
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%%====================================================================
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%% Storage
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%%====================================================================
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add_xupdate(LUser, LServer, Hash) ->
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:add_xupdate(LUser, LServer, Hash).
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get_xupdate(LUser, LServer) ->
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:get_xupdate(LUser, LServer).
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remove_xupdate(LUser, LServer) ->
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:remove_xupdate(LUser, LServer).
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%%%----------------------------------------------------------------------
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%%% Presence stanza rebuilding
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%%%----------------------------------------------------------------------
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presence_with_xupdate(#xmlel{name = <<"presence">>,
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attrs = Attrs, children = Els},
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User, Host) ->
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XPhotoEl = build_xphotoel(User, Host),
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Els2 = presence_with_xupdate2(Els, [], XPhotoEl),
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#xmlel{name = <<"presence">>, attrs = Attrs,
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children = Els2}.
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presence_with_xupdate2([], Els2, XPhotoEl) ->
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lists:reverse([XPhotoEl | Els2]);
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%% This clause assumes that the x element contains only the XMLNS attribute:
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presence_with_xupdate2([#xmlel{name = <<"x">>,
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attrs = [{<<"xmlns">>, ?NS_VCARD_UPDATE}]}
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| Els],
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Els2, XPhotoEl) ->
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presence_with_xupdate2(Els, Els2, XPhotoEl);
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presence_with_xupdate2([El | Els], Els2, XPhotoEl) ->
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presence_with_xupdate2(Els, [El | Els2], XPhotoEl).
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build_xphotoel(User, Host) ->
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Hash = get_xupdate(User, Host),
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PhotoSubEls = case Hash of
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Hash when is_binary(Hash) -> [{xmlcdata, Hash}];
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_ -> []
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end,
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PhotoEl = [#xmlel{name = <<"photo">>, attrs = [],
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children = PhotoSubEls}],
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#xmlel{name = <<"x">>,
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attrs = [{<<"xmlns">>, ?NS_VCARD_UPDATE}],
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children = PhotoEl}.
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export(LServer) ->
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:export(LServer).
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import(LServer) ->
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Mod = gen_mod:db_mod(LServer, ?MODULE),
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Mod:import(LServer).
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import(LServer, DBType, LA) ->
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Mod = gen_mod:db_mod(DBType, ?MODULE),
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Mod:import(LServer, LA).
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mod_opt_type(db_type) -> fun gen_mod:v_db/1;
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mod_opt_type(_) -> [db_type].
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