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%%%----------------------------------------------------------------------
%%% File : mod_roster.erl
%%% Author : Alexey Shchepin <alexey@sevcom.net>
%%% Purpose :
%%% Created : 11 Dec 2002 by Alexey Shchepin <alexey@sevcom.net>
%%% Id : $Id$
%%%----------------------------------------------------------------------
-module(mod_roster).
-author('alexey@sevcom.net').
-vsn('$Revision$ ').
-export([]).
-export([start/0, init/0, process_iq/3]).
-include_lib("mnemosyne/include/mnemosyne.hrl").
-include("ejabberd.hrl").
-record(roster, {user,
jid,
name = "",
subscription = none,
groups = [],
xattrs = [],
xs = []}).
-define(ME, ejabberd_mod_roster).
start() ->
register(?ME, spawn(mod_roster, init, [])).
init() ->
mnesia:create_table(roster,[{disc_copies, [node()]},
{type, bag},
{attributes, record_info(fields, roster)}]),
mnesia:add_table_index(roster, jid),
ejabberd_local:register_iq_handler("jabber:iq:roster",
?MODULE, process_iq),
loop().
loop() ->
receive
{process_iq, From, To, {iq, ID, Type, XMLNS, SubEl}} ->
case Type of
set ->
ResIQ = process_iq_set(From, To,
{iq, ID, Type, XMLNS, SubEl}),
ejabberd_router ! {route,
To,
From,
jlib:iq_to_xml(ResIQ)},
loop();
get ->
ResIQ = process_iq_get(From, To,
{iq, ID, Type, XMLNS, SubEl}),
ejabberd_router ! {route,
To,
From,
jlib:iq_to_xml(ResIQ)},
loop()
end
end.
process_iq(From, To, IQ) ->
{iq, ID, Type, XMLNS, SubEl} = IQ,
{_, Server, _} = From,
case ?MYNAME of
Server ->
?ME ! {process_iq, From, To, IQ},
ignore;
_ ->
{iq, ID, error, XMLNS,
[SubEl, jlib:make_error_element("404", "Not Found")]}
end.
process_iq_get(From, To, {iq, ID, Type, XMLNS, SubEl}) ->
{User, _, _} = From,
LUser = jlib:tolower(User),
F = fun() ->
mnesia:read({roster, LUser})
end,
case mnesia:transaction(F) of
{atomic, Items} ->
XItems = lists:map(fun item_to_xml/1, Items),
{iq, ID, result, XMLNS, [{xmlelement, "query",
[{"xmlns", "jabber:iq:roster"}],
XItems}]};
_ ->
{iq, ID, error, XMLNS,
[SubEl, jlib:make_error_element("500",
"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];
remove ->
[{"subscription", "remove"} | Attrs2];
_ ->
% TODO
Attrs2
end,
Attrs = Attrs3 ++ 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, ID, Type, XMLNS, SubEl}) ->
{User, _, _} = From,
{xmlelement, Name, Attrs, Els} = SubEl,
lists:foreach(fun(El) -> process_item_set(User, To, El) end, Els),
{iq, ID, result, XMLNS, []}.
process_item_set(User, To, XItem) ->
{xmlelement, Name, Attrs, Els} = XItem,
% TODO: load existing item
JID = jlib:string_to_jid(xml:get_attr_s("jid", Attrs)),
LUser = jlib:tolower(User),
case JID of
error ->
ok;
_ ->
F = fun() ->
Res = mnemosyne:eval(query [X || X <- table(roster),
X.user = LUser,
X.jid = JID]
end),
Item = case Res of
[] ->
#roster{user = LUser,
jid = JID,
groups = [],
xattrs = [],
xs = []};
[I] ->
mnesia:delete_object(I),
I#roster{groups = [],
xattrs = [],
xs = []}
end,
Item1 = process_item_attrs(Item, Attrs),
Item2 = process_item_els(Item1, Els),
case Item2#roster.subscription of
remove ->
ok;
_ ->
mnesia:write(Item2)
end,
Item2
end,
case mnesia:transaction(F) of
{atomic, Item} ->
push_item(User, To, Item),
ok;
E ->
?DEBUG("ROSTER: roster item set error: ~p~n", [E]),
ok
end
end.
process_item_attrs(Item, [{Attr, Val} | Attrs]) ->
case Attr of
"jid" ->
case jlib:string_to_jid(Val) of
error ->
process_item_attrs(Item, Attrs);
JID ->
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.
% {user, jid, name, subscription, groups, xattrs, xs}
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) ->
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
push_item(User, Resource, From, Item) ->
ResIQ = {iq, "", set, "jabber:iq:roster",
[{xmlelement, "query",
[{"xmlns", "jabber:iq:roster"}],
[item_to_xml(Item)]}]},
ejabberd_router ! {route,
From,
{User, ?MYNAME, Resource},
jlib:iq_to_xml(ResIQ)}.
|
