mirror of
https://github.com/processone/ejabberd.git
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258 lines
8.8 KiB
Erlang
258 lines
8.8 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : mod_private.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : Support for private storage.
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%%% Created : 16 Jan 2003 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2013 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License
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%%% along with this program; if not, write to the Free Software
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%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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%%% 02111-1307 USA
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%%%
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%%%----------------------------------------------------------------------
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-module(mod_private).
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-author('alexey@process-one.net').
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-behaviour(gen_mod).
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-export([start/2,
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stop/1,
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process_sm_iq/3,
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remove_user/2]).
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-include("ejabberd.hrl").
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-include("jlib.hrl").
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-record(private_storage, {usns, xml}).
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-define(Xmlel_Query(Attrs, Children),
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(
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{xmlelement, "query", Attrs, Children}
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)).
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start(Host, Opts) ->
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IQDisc = gen_mod:get_opt(iqdisc, Opts, one_queue),
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case gen_mod:db_type(Opts) of
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mnesia ->
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mnesia:create_table(private_storage,
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[{disc_only_copies, [node()]},
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{attributes,
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record_info(fields, private_storage)}]),
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update_table();
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_ ->
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ok
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end,
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ejabberd_hooks:add(remove_user, Host,
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?MODULE, remove_user, 50),
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gen_iq_handler:add_iq_handler(ejabberd_sm, Host, ?NS_PRIVATE,
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?MODULE, process_sm_iq, IQDisc).
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stop(Host) ->
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ejabberd_hooks:delete(remove_user, Host,
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?MODULE, remove_user, 50),
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gen_iq_handler:remove_iq_handler(ejabberd_sm, Host, ?NS_PRIVATE).
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process_sm_iq(#jid{luser = LUser, lserver = LServer},
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#jid{luser = LUser, lserver = LServer}, IQ)
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when IQ#iq.type == 'set' ->
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case IQ#iq.sub_el of
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{xmlelement, "query", _, Xmlels} ->
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case filter_xmlels(Xmlels) of
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[] ->
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IQ#iq{
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type = error,
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sub_el = [IQ#iq.sub_el, ?ERR_NOT_ACCEPTABLE]
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};
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Data ->
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DBType = gen_mod:db_type(LServer, ?MODULE),
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F = fun() ->
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lists:foreach(
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fun
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(Datum) ->
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set_data(LUser, LServer,
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Datum, DBType)
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end, Data)
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end,
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case DBType of
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odbc ->
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ejabberd_odbc:sql_transaction(LServer, F);
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mnesia ->
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mnesia:transaction(F)
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end,
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IQ#iq{type = result, sub_el = []}
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end;
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_ ->
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IQ#iq{type = error, sub_el = [IQ#iq.sub_el, ?ERR_NOT_ACCEPTABLE]}
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end;
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%%
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process_sm_iq(#jid{luser = LUser, lserver = LServer},
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#jid{luser = LUser, lserver = LServer}, IQ)
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when IQ#iq.type == 'get' ->
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case IQ#iq.sub_el of
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{xmlelement, "query", Attrs, Xmlels} ->
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case filter_xmlels(Xmlels) of
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[] ->
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IQ#iq{
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type = error,
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sub_el = [IQ#iq.sub_el, ?ERR_BAD_FORMAT]
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};
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Data ->
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case catch get_data(LUser, LServer, Data) of
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{'EXIT', _Reason} ->
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IQ#iq{
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type = error,
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sub_el = [IQ#iq.sub_el, ?ERR_INTERNAL_SERVER_ERROR]
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};
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Storage_Xmlels ->
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IQ#iq{
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type = result,
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sub_el = [?Xmlel_Query(Attrs, Storage_Xmlels)]
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}
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end
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end;
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_ ->
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IQ#iq{type = error, sub_el = [IQ#iq.sub_el, ?ERR_BAD_FORMAT]}
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end;
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%%
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process_sm_iq(_From, _To, IQ) ->
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IQ#iq{type = error, sub_el = [IQ#iq.sub_el, ?ERR_FORBIDDEN]}.
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filter_xmlels(Xmlels) ->
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filter_xmlels(Xmlels, []).
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filter_xmlels([], Data) ->
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lists:reverse(Data);
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filter_xmlels([{xmlelement, _, Attrs, _} = Xmlel | Xmlels], Data) ->
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case xml:get_attr_s("xmlns", Attrs) of
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"" -> [];
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XmlNS -> filter_xmlels(Xmlels, [{XmlNS, Xmlel} | Data])
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end;
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filter_xmlels([_ | Xmlels], Data) ->
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filter_xmlels(Xmlels, Data).
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set_data(LUser, LServer, {XmlNS, Xmlel}, mnesia) ->
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mnesia:write(#private_storage{
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usns = {LUser, LServer, XmlNS},
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xml = Xmlel});
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set_data(LUser, LServer, {XMLNS, El}, odbc) ->
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Username = ejabberd_odbc:escape(LUser),
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LXMLNS = ejabberd_odbc:escape(XMLNS),
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SData = ejabberd_odbc:escape(
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xml:element_to_binary(El)),
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odbc_queries:set_private_data(LServer, Username, LXMLNS, SData).
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get_data(LUser, LServer, Data) ->
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get_data(LUser, LServer, gen_mod:db_type(LServer, ?MODULE), Data, []).
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get_data(_LUser, _LServer, _DBType, [], Storage_Xmlels) ->
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lists:reverse(Storage_Xmlels);
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get_data(LUser, LServer, mnesia, [{XmlNS, Xmlel} | Data], Storage_Xmlels) ->
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case mnesia:dirty_read(private_storage, {LUser, LServer, XmlNS}) of
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[#private_storage{xml = Storage_Xmlel}] ->
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get_data(LUser, LServer, mnesia, Data,
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[Storage_Xmlel | Storage_Xmlels]);
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_ ->
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get_data(LUser, LServer, mnesia, Data,
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[Xmlel | Storage_Xmlels])
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end;
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get_data(LUser, LServer, odbc, [{XMLNS, El} | Els], Res) ->
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Username = ejabberd_odbc:escape(LUser),
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LXMLNS = ejabberd_odbc:escape(XMLNS),
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case catch odbc_queries:get_private_data(LServer, Username, LXMLNS) of
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{selected, ["data"], [{SData}]} ->
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case xml_stream:parse_element(SData) of
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Data when element(1, Data) == xmlelement ->
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get_data(LUser, LServer, odbc, Els, [Data | Res])
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end;
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%% MREMOND: I wonder when the query could return a vcard ?
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{selected, ["vcard"], []} ->
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get_data(LUser, LServer, odbc, Els, [El | Res]);
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_ ->
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get_data(LUser, LServer, odbc, Els, [El | Res])
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end.
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remove_user(User, Server) ->
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LUser = jlib:nodeprep(User),
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LServer = jlib:nameprep(Server),
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remove_user(LUser, LServer, gen_mod:db_type(Server, ?MODULE)).
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remove_user(LUser, LServer, mnesia) ->
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F = fun() ->
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Namespaces = mnesia:select(
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private_storage,
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[{#private_storage{usns={LUser, LServer, '$1'},
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_ = '_'},
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[],
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['$$']}]),
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lists:foreach(
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fun([Namespace]) ->
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mnesia:delete({private_storage,
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{LUser, LServer, Namespace}})
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end, Namespaces)
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end,
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mnesia:transaction(F);
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remove_user(LUser, LServer, odbc) ->
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Username = ejabberd_odbc:escape(LUser),
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odbc_queries:del_user_private_storage(LServer, Username).
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update_table() ->
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Fields = record_info(fields, private_storage),
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case mnesia:table_info(private_storage, attributes) of
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Fields ->
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ok;
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[userns, xml] ->
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?INFO_MSG("Converting private_storage table from "
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"{user, default, lists} format", []),
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Host = ?MYNAME,
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{atomic, ok} = mnesia:create_table(
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mod_private_tmp_table,
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[{disc_only_copies, [node()]},
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{type, bag},
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{local_content, true},
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{record_name, private_storage},
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{attributes, record_info(fields, private_storage)}]),
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mnesia:transform_table(private_storage, ignore, Fields),
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F1 = fun() ->
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mnesia:write_lock_table(mod_private_tmp_table),
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mnesia:foldl(
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fun(#private_storage{usns = {U, NS}} = R, _) ->
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mnesia:dirty_write(
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mod_private_tmp_table,
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R#private_storage{usns = {U, Host, NS}})
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end, ok, private_storage)
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end,
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mnesia:transaction(F1),
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mnesia:clear_table(private_storage),
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F2 = fun() ->
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mnesia:write_lock_table(private_storage),
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mnesia:foldl(
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fun(R, _) ->
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mnesia:dirty_write(R)
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end, ok, mod_private_tmp_table)
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end,
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mnesia:transaction(F2),
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mnesia:delete_table(mod_private_tmp_table);
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_ ->
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?INFO_MSG("Recreating private_storage table", []),
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mnesia:transform_table(private_storage, ignore, Fields)
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end.
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