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Diffstat (limited to 'src/mod_last_mnesia.erl')
-rw-r--r-- | src/mod_last_mnesia.erl | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/src/mod_last_mnesia.erl b/src/mod_last_mnesia.erl new file mode 100644 index 00000000..7a1610ab --- /dev/null +++ b/src/mod_last_mnesia.erl @@ -0,0 +1,72 @@ +%%%------------------------------------------------------------------- +%%% @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_last_mnesia). +-behaviour(mod_last). + +%% API +-export([init/2, import/2, get_last/2, store_last_info/4, remove_user/2]). + +-include("mod_last.hrl"). +-include("logger.hrl"). + +%%%=================================================================== +%%% API +%%%=================================================================== +init(_Host, _Opts) -> + mnesia:create_table(last_activity, + [{disc_copies, [node()]}, + {attributes, + record_info(fields, last_activity)}]), + update_table(). + +get_last(LUser, LServer) -> + case mnesia:dirty_read(last_activity, {LUser, LServer}) of + [] -> + not_found; + [#last_activity{timestamp = TimeStamp, + status = Status}] -> + {ok, TimeStamp, Status} + end. + +store_last_info(LUser, LServer, TimeStamp, Status) -> + US = {LUser, LServer}, + F = fun () -> + mnesia:write(#last_activity{us = US, + timestamp = TimeStamp, + status = Status}) + end, + mnesia:transaction(F). + +remove_user(LUser, LServer) -> + US = {LUser, LServer}, + F = fun () -> mnesia:delete({last_activity, US}) end, + mnesia:transaction(F). + +import(_LServer, #last_activity{} = LA) -> + mnesia:dirty_write(LA). + +%%%=================================================================== +%%% Internal functions +%%%=================================================================== +update_table() -> + Fields = record_info(fields, last_activity), + case mnesia:table_info(last_activity, attributes) of + Fields -> + ejabberd_config:convert_table_to_binary( + last_activity, Fields, set, + fun(#last_activity{us = {U, _}}) -> U end, + fun(#last_activity{us = {U, S}, status = Status} = R) -> + R#last_activity{us = {iolist_to_binary(U), + iolist_to_binary(S)}, + status = iolist_to_binary(Status)} + end); + _ -> + ?INFO_MSG("Recreating last_activity table", []), + mnesia:transform_table(last_activity, ignore, Fields) + end. |