%%%----------------------------------------------------------------------
%%% File    : ejabberd.erl
%%% Author  : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : ejabberd wrapper: start / stop
%%% Created : 16 Nov 2002 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2013   ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License
%%% along with this program; if not, write to the Free Software
%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%----------------------------------------------------------------------

-module(ejabberd).
-author('alexey@process-one.net').

-export([start/0, stop/0, start_app/1,
	 get_pid_file/0]).

-include("logger.hrl").

start() ->
    %%ejabberd_cover:start(),
    application:start(ejabberd).

stop() ->
    application:stop(ejabberd).
    %%ejabberd_cover:stop().

%% @spec () -> false | string()
get_pid_file() ->
    case os:getenv("EJABBERD_PID_PATH") of
	false ->
	    false;
	"" ->
	    false;
	Path ->
	    Path
    end.

start_app(App) when not is_list(App) ->
    start_app([App]);
start_app([App|Apps]) ->
    case application:start(App) of
        ok ->
            start_app(Apps);
        {error, {already_started, _}} ->
            start_app(Apps);
        {error, {not_started, DepApp}} ->
            case lists:member(DepApp, [App|Apps]) of
                true ->
                    ?CRITICAL_MSG("failed to start application '~p': "
                                  "circular dependency on '~p' detected",
                                  [App, DepApp]),
                    erlang:error(application_start_failed);
                false ->
                    start_app([DepApp,App|Apps])
            end;
        Err ->
            ?CRITICAL_MSG("failed to start application '~p': ~p", [App, Err]),
            erlang:error(application_start_failed)
    end;
start_app([]) ->
    ok.