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xmpp.chapril.org-ejabberd/src/mod_roster.erl

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%%%----------------------------------------------------------------------
%%% File : mod_roster.erl
%%% Author : Alexey Shchepin <alexey@sevcom.net>
%%% Purpose : Roster management
%%% Created : 11 Dec 2002 by Alexey Shchepin <alexey@sevcom.net>
%%% Id : $Id$
%%%----------------------------------------------------------------------
-module(mod_roster).
-author('alexey@sevcom.net').
-vsn('$Revision$ ').
-behaviour(gen_mod).
-export([start/1, stop/0,
process_iq/3,
process_local_iq/3,
get_subscription_lists/1,
in_subscription/3,
out_subscription/3,
set_items/2,
remove_user/1,
get_jid_info/2]).
-include("ejabberd.hrl").
-include("jlib.hrl").
-record(roster, {uj,
user,
jid,
name = "",
subscription = none,
ask = none,
groups = [],
xattrs = [],
xs = []}).
start(Opts) ->
IQDisc = gen_mod:get_opt(iqdisc, Opts, one_queue),
mnesia:create_table(roster,[{disc_copies, [node()]},
{attributes, record_info(fields, roster)}]),
mnesia:add_table_index(roster, user),
gen_iq_handler:add_iq_handler(ejabberd_sm, ?NS_ROSTER,
?MODULE, process_iq, IQDisc).
stop() ->
gen_iq_handler:remove_iq_handler(ejabberd_sm, ?NS_ROSTER).
-define(PSI_ROSTER_WORKAROUND, true).
-ifdef(PSI_ROSTER_WORKAROUND).
process_iq(From, To, IQ) ->
#iq{sub_el = SubEl} = IQ,
#jid{lserver = LServer} = From,
case ?MYNAME of
LServer ->
ResIQ = process_local_iq(From, To, IQ),
ejabberd_router:route(From, From,
jlib:iq_to_xml(ResIQ)),
ignore;
_ ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_ITEM_NOT_FOUND]}
end.
-else.
process_iq(From, To, IQ) ->
#iq{sub_el = SubEl} = IQ,
#jid{lserver = LServer} = From,
case ?MYNAME of
LServer ->
process_local_iq(From, To, IQ);
_ ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_ITEM_NOT_FOUND]}
end.
-endif.
process_local_iq(From, To, #iq{type = Type} = IQ) ->
case Type of
set ->
process_iq_set(From, To, IQ);
get ->
process_iq_get(From, To, IQ)
end.
process_iq_get(From, _To, #iq{sub_el = SubEl} = IQ) ->
#jid{luser = LUser} = From,
case catch mnesia:dirty_index_read(roster, LUser, #roster.user) of
Items when is_list(Items) ->
XItems = lists:map(fun item_to_xml/1, Items),
IQ#iq{type = result,
sub_el = [{xmlelement, "query",
[{"xmlns", ?NS_ROSTER}],
XItems}]};
_ ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_INTERNAL_SERVER_ERROR]}
end.
item_to_xml(Item) ->
Attrs1 = [{"jid", jlib:jid_to_string(Item#roster.jid)}],
Attrs2 = case Item#roster.name of
"" ->
Attrs1;
Name ->
[{"name", Name} | Attrs1]
end,
Attrs3 = case Item#roster.subscription of
none ->
[{"subscription", "none"} | Attrs2];
from ->
[{"subscription", "from"} | Attrs2];
to ->
[{"subscription", "to"} | Attrs2];
both ->
[{"subscription", "both"} | Attrs2];
remove ->
[{"subscription", "remove"} | Attrs2]
end,
Attrs4 = case ask_to_pending(Item#roster.ask) of
out ->
[{"ask", "subscribe"} | Attrs3];
both ->
[{"ask", "subscribe"} | Attrs3];
_ ->
Attrs3
end,
Attrs = Attrs4 ++ Item#roster.xattrs,
SubEls1 = lists:map(fun(G) ->
{xmlelement, "group", [], [{xmlcdata, G}]}
end, Item#roster.groups),
SubEls = SubEls1 ++ Item#roster.xs,
{xmlelement, "item", Attrs, SubEls}.
process_iq_set(From, To, #iq{sub_el = SubEl} = IQ) ->
{xmlelement, _Name, _Attrs, Els} = SubEl,
lists:foreach(fun(El) -> process_item_set(From, To, El) end, Els),
IQ#iq{type = result, sub_el = []}.
process_item_set(From, To, {xmlelement, _Name, Attrs, Els}) ->
JID1 = jlib:string_to_jid(xml:get_attr_s("jid", Attrs)),
#jid{user = User, luser = LUser} = From,
case JID1 of
error ->
ok;
_ ->
JID = {JID1#jid.user, JID1#jid.server, JID1#jid.resource},
LJID = jlib:jid_tolower(JID1),
F = fun() ->
Res = mnesia:read({roster, {LUser, LJID}}),
Item = case Res of
[] ->
#roster{uj = {LUser, LJID},
user = LUser,
jid = JID};
[I] ->
I#roster{user = LUser,
jid = JID,
name = "",
groups = [],
xattrs = [],
xs = []}
end,
Item1 = process_item_attrs(Item, Attrs),
Item2 = process_item_els(Item1, Els),
case Item2#roster.subscription of
remove ->
mnesia:delete({roster, {LUser, LJID}});
_ ->
mnesia:write(Item2)
end,
{Item, Item2}
end,
case mnesia:transaction(F) of
{atomic, {OldItem, Item}} ->
push_item(User, To, Item),
case Item#roster.subscription of
remove ->
IsTo = case OldItem#roster.subscription of
both -> true;
to -> true;
_ -> false
end,
IsFrom = case OldItem#roster.subscription of
both -> true;
from -> true;
_ -> false
end,
if IsTo ->
ejabberd_router:route(
jlib:jid_remove_resource(From),
jlib:make_jid(OldItem#roster.jid),
{xmlelement, "presence",
[{"type", "unsubscribe"}],
[]});
true -> ok
end,
if IsFrom ->
ejabberd_router:route(
jlib:jid_remove_resource(From),
jlib:make_jid(OldItem#roster.jid),
{xmlelement, "presence",
[{"type", "unsubscribed"}],
[]});
true -> ok
end,
ok;
_ ->
ok
end;
E ->
?DEBUG("ROSTER: roster item set error: ~p~n", [E]),
ok
end
end;
process_item_set(_From, _To, _) ->
ok.
process_item_attrs(Item, [{Attr, Val} | Attrs]) ->
case Attr of
"jid" ->
case jlib:string_to_jid(Val) of
error ->
process_item_attrs(Item, Attrs);
JID1 ->
JID = {JID1#jid.user, JID1#jid.server, JID1#jid.resource},
process_item_attrs(Item#roster{jid = JID}, Attrs)
end;
"name" ->
process_item_attrs(Item#roster{name = Val}, Attrs);
"subscription" ->
case Val of
"remove" ->
process_item_attrs(Item#roster{subscription = remove},
Attrs);
_ ->
process_item_attrs(Item, Attrs)
end;
"ask" ->
process_item_attrs(Item, Attrs);
_ ->
XAttrs = Item#roster.xattrs,
process_item_attrs(Item#roster{xattrs = [{Attr, Val} | XAttrs]},
Attrs)
end;
process_item_attrs(Item, []) ->
Item.
process_item_els(Item, [{xmlelement, Name, Attrs, SEls} | Els]) ->
case Name of
"group" ->
Groups = [xml:get_cdata(SEls) | Item#roster.groups],
process_item_els(Item#roster{groups = Groups}, Els);
_ ->
case xml:get_attr_s("xmlns", Attrs) of
"" ->
process_item_els(Item, Els);
_ ->
XEls = [{xmlelement, Name, Attrs, SEls} | Item#roster.xs],
process_item_els(Item#roster{xs = XEls}, Els)
end
end;
process_item_els(Item, [{xmlcdata, _} | Els]) ->
process_item_els(Item, Els);
process_item_els(Item, []) ->
Item.
push_item(User, From, Item) ->
ejabberd_sm ! {route,
jlib:make_jid("", "", ""),
jlib:make_jid(User, "", ""),
{xmlelement, "broadcast", [],
[{item,
Item#roster.jid,
Item#roster.subscription}]}},
lists:foreach(fun(Resource) ->
push_item(User, Resource, From, Item)
end, ejabberd_sm:get_user_resources(User)).
% TODO: don't push to those who not load roster
-ifdef(PSI_ROSTER_WORKAROUND).
push_item(User, Resource, _From, Item) ->
ResIQ = #iq{type = set, xmlns = ?NS_ROSTER,
sub_el = [{xmlelement, "query",
[{"xmlns", ?NS_ROSTER}],
[item_to_xml(Item)]}]},
ejabberd_router:route(
jlib:make_jid(User, ?MYNAME, Resource),
jlib:make_jid(User, ?MYNAME, Resource),
jlib:iq_to_xml(ResIQ)).
-else.
push_item(User, Resource, From, Item) ->
ResIQ = #iq{type = set, xmlns = ?NS_ROSTER,
sub_el = [{xmlelement, "query",
[{"xmlns", ?NS_ROSTER}],
[item_to_xml(Item)]}]},
ejabberd_router:route(
From,
jlib:make_jid(User, ?MYNAME, Resource),
jlib:iq_to_xml(ResIQ)).
-endif.
get_subscription_lists(User) ->
LUser = jlib:nodeprep(User),
case mnesia:dirty_index_read(roster, LUser, #roster.user) of
Items when is_list(Items) ->
fill_subscription_lists(Items, [], []);
_ ->
{[], []}
end.
fill_subscription_lists([I | Is], F, T) ->
J = element(2, I#roster.uj),
case I#roster.subscription of
both ->
fill_subscription_lists(Is, [J | F], [J | T]);
from ->
fill_subscription_lists(Is, [J | F], T);
to ->
fill_subscription_lists(Is, F, [J | T]);
_ ->
fill_subscription_lists(Is, F, T)
end;
fill_subscription_lists([], F, T) ->
{F, T}.
ask_to_pending(subscribe) -> out;
ask_to_pending(unsubscribe) -> none;
ask_to_pending(Ask) -> Ask.
in_subscription(User, JID, Type) ->
process_subscription(in, User, JID, Type).
out_subscription(User, JID, Type) ->
process_subscription(out, User, JID, Type).
process_subscription(Direction, User, JID1, Type) ->
LUser = jlib:nodeprep(User),
LJID = jlib:jid_tolower(JID1),
F = fun() ->
Item = case mnesia:read({roster, {LUser, LJID}}) of
[] ->
JID = {JID1#jid.user,
JID1#jid.server,
JID1#jid.resource},
#roster{uj = {LUser, LJID},
user = LUser,
jid = JID};
[I] ->
I
end,
NewState = case Direction of
out ->
out_state_change(Item#roster.subscription,
Item#roster.ask,
Type);
in ->
in_state_change(Item#roster.subscription,
Item#roster.ask,
Type)
end,
AutoReply = case Direction of
out ->
none;
in ->
in_auto_reply(Item#roster.subscription,
Item#roster.ask,
Type)
end,
case NewState of
none ->
{none, AutoReply};
{Subscription, Pending} ->
NewItem = Item#roster{subscription = Subscription,
ask = Pending},
mnesia:write(NewItem),
{{push, NewItem}, AutoReply}
end
end,
case mnesia:transaction(F) of
{atomic, {Push, AutoReply}} ->
case AutoReply of
none ->
ok;
_ ->
T = case AutoReply of
subscribed -> "subscribed";
unsubscribed -> "unsubscribed"
end,
ejabberd_router:route(
jlib:make_jid(User, ?MYNAME, ""), JID1,
{xmlelement, "presence", [{"type", T}], []})
end,
case Push of
{push, Item} ->
push_item(User, jlib:make_jid("", ?MYNAME, ""), Item),
true;
none ->
false
end;
_ ->
false
end.
%% in_state_change(Subscription, Pending, Type) -> NewState
%% NewState = none | {NewSubscription, NewPending}
in_state_change(none, none, subscribe) -> {none, in};
in_state_change(none, none, subscribed) -> {to, none}; % Workaround for gateways
%in_state_change(none, none, subscribed) -> none;
in_state_change(none, none, unsubscribe) -> none;
in_state_change(none, none, unsubscribed) -> none;
in_state_change(none, out, subscribe) -> {none, both};
in_state_change(none, out, subscribed) -> {to, none};
in_state_change(none, out, unsubscribe) -> none;
in_state_change(none, out, unsubscribed) -> {none, none};
in_state_change(none, in, subscribe) -> none;
in_state_change(none, in, subscribed) -> {to, in}; % Workaround for gateways
%in_state_change(none, in, subscribed) -> none;
in_state_change(none, in, unsubscribe) -> {none, none};
in_state_change(none, in, unsubscribed) -> none;
in_state_change(none, both, subscribe) -> none;
in_state_change(none, both, subscribed) -> {to, in};
in_state_change(none, both, unsubscribe) -> {none, out};
in_state_change(none, both, unsubscribed) -> {none, in};
in_state_change(to, none, subscribe) -> {to, in};
in_state_change(to, none, subscribed) -> none;
in_state_change(to, none, unsubscribe) -> none;
in_state_change(to, none, unsubscribed) -> {none, none};
in_state_change(to, in, subscribe) -> none;
in_state_change(to, in, subscribed) -> none;
in_state_change(to, in, unsubscribe) -> {to, none};
in_state_change(to, in, unsubscribed) -> {none, in};
in_state_change(from, none, subscribe) -> none;
in_state_change(from, none, subscribed) -> none;
in_state_change(from, none, unsubscribe) -> {none, none};
in_state_change(from, none, unsubscribed) -> none;
in_state_change(from, out, subscribe) -> none;
in_state_change(from, out, subscribed) -> {both, none};
in_state_change(from, out, unsubscribe) -> {none, out};
in_state_change(from, out, unsubscribed) -> {from, none};
in_state_change(both, none, subscribe) -> none;
in_state_change(both, none, subscribed) -> none;
in_state_change(both, none, unsubscribe) -> {to, none};
in_state_change(both, none, unsubscribed) -> {from, none}.
out_state_change(none, none, subscribe) -> {none, out};
out_state_change(none, none, subscribed) -> none;
out_state_change(none, none, unsubscribe) -> none;
out_state_change(none, none, unsubscribed) -> none;
out_state_change(none, out, subscribe) -> none;
out_state_change(none, out, subscribed) -> none;
out_state_change(none, out, unsubscribe) -> {none, none};
out_state_change(none, out, unsubscribed) -> none;
out_state_change(none, in, subscribe) -> {none, both};
out_state_change(none, in, subscribed) -> {from, none};
out_state_change(none, in, unsubscribe) -> none;
out_state_change(none, in, unsubscribed) -> {none, none};
out_state_change(none, both, subscribe) -> none;
out_state_change(none, both, subscribed) -> {from, out};
out_state_change(none, both, unsubscribe) -> {none, in};
out_state_change(none, both, unsubscribed) -> {none, out};
out_state_change(to, none, subscribe) -> none;
out_state_change(to, none, subscribed) -> none;
out_state_change(to, none, unsubscribe) -> {none, none};
out_state_change(to, none, unsubscribed) -> none;
out_state_change(to, in, subscribe) -> none;
out_state_change(to, in, subscribed) -> {both, none};
out_state_change(to, in, unsubscribe) -> {none, in};
out_state_change(to, in, unsubscribed) -> {to, none};
out_state_change(from, none, subscribe) -> {from, out};
out_state_change(from, none, subscribed) -> none;
out_state_change(from, none, unsubscribe) -> none;
out_state_change(from, none, unsubscribed) -> {none, none};
out_state_change(from, out, subscribe) -> none;
out_state_change(from, out, subscribed) -> none;
out_state_change(from, out, unsubscribe) -> {from, none};
out_state_change(from, out, unsubscribed) -> {none, out};
out_state_change(both, none, subscribe) -> none;
out_state_change(both, none, subscribed) -> none;
out_state_change(both, none, unsubscribe) -> {from, none};
out_state_change(both, none, unsubscribed) -> {to, none}.
in_auto_reply(from, none, subscribe) -> subscribed;
in_auto_reply(from, out, subscribe) -> subscribed;
in_auto_reply(both, none, subscribe) -> subscribed;
in_auto_reply(none, in, unsubscribe) -> unsubscribed;
in_auto_reply(none, both, unsubscribe) -> unsubscribed;
in_auto_reply(to, in, unsubscribe) -> unsubscribed;
in_auto_reply(from, none, unsubscribe) -> unsubscribed;
in_auto_reply(from, out, unsubscribe) -> unsubscribed;
in_auto_reply(both, none, unsubscribe) -> unsubscribed;
in_auto_reply(_, _, _) -> none.
remove_user(User) ->
LUser = jlib:nodeprep(User),
F = fun() ->
lists:foreach(fun(R) ->
mnesia:delete_object(R)
end,
mnesia:index_read(roster, LUser, #roster.user))
end,
mnesia:transaction(F).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
set_items(User, SubEl) ->
{xmlelement, _Name, _Attrs, Els} = SubEl,
LUser = jlib:nodeprep(User),
F = fun() ->
lists:foreach(fun(El) -> process_item_set_t(LUser, El) end, Els)
end,
mnesia:transaction(F).
process_item_set_t(LUser, {xmlelement, _Name, Attrs, Els}) ->
JID1 = jlib:string_to_jid(xml:get_attr_s("jid", Attrs)),
case JID1 of
error ->
ok;
_ ->
JID = {JID1#jid.user, JID1#jid.server, JID1#jid.resource},
LJID = {JID1#jid.luser, JID1#jid.lserver, JID1#jid.lresource},
Item = #roster{uj = {LUser, LJID},
user = LUser,
jid = JID},
Item1 = process_item_attrs_ws(Item, Attrs),
Item2 = process_item_els(Item1, Els),
case Item2#roster.subscription of
remove ->
mnesia:delete({roster, {LUser, LJID}});
_ ->
mnesia:write(Item2)
end
end;
process_item_set_t(_LUser, _) ->
ok.
process_item_attrs_ws(Item, [{Attr, Val} | Attrs]) ->
case Attr of
"jid" ->
case jlib:string_to_jid(Val) of
error ->
process_item_attrs_ws(Item, Attrs);
JID1 ->
JID = {JID1#jid.user, JID1#jid.server, JID1#jid.resource},
process_item_attrs_ws(Item#roster{jid = JID}, Attrs)
end;
"name" ->
process_item_attrs_ws(Item#roster{name = Val}, Attrs);
"subscription" ->
case Val of
"remove" ->
process_item_attrs_ws(Item#roster{subscription = remove},
Attrs);
"none" ->
process_item_attrs_ws(Item#roster{subscription = none},
Attrs);
"both" ->
process_item_attrs_ws(Item#roster{subscription = both},
Attrs);
"from" ->
process_item_attrs_ws(Item#roster{subscription = from},
Attrs);
"to" ->
process_item_attrs_ws(Item#roster{subscription = to},
Attrs);
_ ->
process_item_attrs_ws(Item, Attrs)
end;
"ask" ->
process_item_attrs_ws(Item, Attrs);
_ ->
XAttrs = Item#roster.xattrs,
process_item_attrs_ws(Item#roster{xattrs = [{Attr, Val} | XAttrs]},
Attrs)
end;
process_item_attrs_ws(Item, []) ->
Item.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
get_jid_info(User, JID) ->
LUser = jlib:nodeprep(User),
LJID = jlib:jid_tolower(JID),
case catch mnesia:dirty_read(roster, {LUser, LJID}) of
[#roster{subscription = Subscription, groups = Groups}] ->
{Subscription, Groups};
_ ->
LRJID = jlib:jid_tolower(jlib:jid_remove_resource(JID)),
if
LRJID == LJID ->
{none, []};
true ->
case catch mnesia:dirty_read(roster, {LUser, LRJID}) of
[#roster{subscription = Subscription,
groups = Groups}] ->
{Subscription, Groups};
_ ->
{none, []}
end
end
end.
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