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%%%-------------------------------------------------------------------
%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
%%% @copyright (C) 2016, Evgeny Khramtsov
%%% @doc
%%%
%%% @end
%%% Created : 13 Apr 2016 by Evgeny Khramtsov <ekhramtsov@process-one.net>
%%%-------------------------------------------------------------------
-module(mod_roster_mnesia).
-behaviour(mod_roster).
%% API
-export([init/2, read_roster_version/2, write_roster_version/4,
get_roster/2, get_roster_by_jid/3, get_only_items/2,
roster_subscribe/4, get_roster_by_jid_with_groups/3,
remove_user/2, update_roster/4, del_roster/3, transaction/2,
read_subscription_and_groups/3, import/2]).
-include("jlib.hrl").
-include("mod_roster.hrl").
-include("logger.hrl").
%%%===================================================================
%%% API
%%%===================================================================
init(_Host, _Opts) ->
mnesia:create_table(roster,
[{disc_copies, [node()]},
{attributes, record_info(fields, roster)}]),
mnesia:create_table(roster_version,
[{disc_copies, [node()]},
{attributes,
record_info(fields, roster_version)}]),
update_tables(),
mnesia:add_table_index(roster, us),
mnesia:add_table_index(roster_version, us).
read_roster_version(LUser, LServer) ->
US = {LUser, LServer},
case mnesia:dirty_read(roster_version, US) of
[#roster_version{version = V}] -> V;
[] -> error
end.
write_roster_version(LUser, LServer, InTransaction, Ver) ->
US = {LUser, LServer},
if InTransaction ->
mnesia:write(#roster_version{us = US, version = Ver});
true ->
mnesia:dirty_write(#roster_version{us = US, version = Ver})
end.
get_roster(LUser, LServer) ->
mnesia:dirty_index_read(roster, {LUser, LServer}, #roster.us).
get_roster_by_jid(LUser, LServer, LJID) ->
case mnesia:read({roster, {LUser, LServer, LJID}}) of
[] ->
#roster{usj = {LUser, LServer, LJID},
us = {LUser, LServer}, jid = LJID};
[I] ->
I#roster{jid = LJID, name = <<"">>, groups = [],
xs = []}
end.
get_only_items(LUser, LServer) ->
get_roster(LUser, LServer).
roster_subscribe(_LUser, _LServer, _LJID, Item) ->
mnesia:write(Item).
get_roster_by_jid_with_groups(LUser, LServer, LJID) ->
case mnesia:read({roster, {LUser, LServer, LJID}}) of
[] ->
#roster{usj = {LUser, LServer, LJID},
us = {LUser, LServer}, jid = LJID};
[I] -> I
end.
remove_user(LUser, LServer) ->
US = {LUser, LServer},
F = fun () ->
lists:foreach(
fun (R) -> mnesia:delete_object(R) end,
mnesia:index_read(roster, US, #roster.us))
end,
mnesia:transaction(F).
update_roster(_LUser, _LServer, _LJID, Item) ->
mnesia:write(Item).
del_roster(LUser, LServer, LJID) ->
mnesia:delete({roster, {LUser, LServer, LJID}}).
read_subscription_and_groups(LUser, LServer, LJID) ->
case mnesia:dirty_read(roster, {LUser, LServer, LJID}) of
[#roster{subscription = Subscription, groups = Groups}] ->
{Subscription, Groups};
_ ->
error
end.
transaction(_LServer, F) ->
mnesia:transaction(F).
import(_LServer, #roster{} = R) ->
mnesia:dirty_write(R);
import(_LServer, #roster_version{} = RV) ->
mnesia:dirty_write(RV).
%%%===================================================================
%%% Internal functions
%%%===================================================================
update_tables() ->
update_roster_table(),
update_roster_version_table().
update_roster_table() ->
Fields = record_info(fields, roster),
case mnesia:table_info(roster, attributes) of
Fields ->
ejabberd_config:convert_table_to_binary(
roster, Fields, set,
fun(#roster{usj = {U, _, _}}) -> U end,
fun(#roster{usj = {U, S, {LU, LS, LR}},
us = {U1, S1},
jid = {U2, S2, R2},
name = Name,
groups = Gs,
askmessage = Ask,
xs = Xs} = R) ->
R#roster{usj = {iolist_to_binary(U),
iolist_to_binary(S),
{iolist_to_binary(LU),
iolist_to_binary(LS),
iolist_to_binary(LR)}},
us = {iolist_to_binary(U1),
iolist_to_binary(S1)},
jid = {iolist_to_binary(U2),
iolist_to_binary(S2),
iolist_to_binary(R2)},
name = iolist_to_binary(Name),
groups = [iolist_to_binary(G) || G <- Gs],
askmessage = try iolist_to_binary(Ask)
catch _:_ -> <<"">> end,
xs = [fxml:to_xmlel(X) || X <- Xs]}
end);
_ ->
?INFO_MSG("Recreating roster table", []),
mnesia:transform_table(roster, ignore, Fields)
end.
%% Convert roster table to support virtual host
%% Convert roster table: xattrs fields become
update_roster_version_table() ->
Fields = record_info(fields, roster_version),
case mnesia:table_info(roster_version, attributes) of
Fields ->
ejabberd_config:convert_table_to_binary(
roster_version, Fields, set,
fun(#roster_version{us = {U, _}}) -> U end,
fun(#roster_version{us = {U, S}, version = Ver} = R) ->
R#roster_version{us = {iolist_to_binary(U),
iolist_to_binary(S)},
version = iolist_to_binary(Ver)}
end);
_ ->
?INFO_MSG("Recreating roster_version table", []),
mnesia:transform_table(roster_version, ignore, Fields)
end.
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