#!/usr/bin/php
<?php

# Copyright (c) 2010-2015 Yubico AB
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#   * Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
#
#   * Redistributions in binary form must reproduce the above
#     copyright notice, this list of conditions and the following
#     disclaimer in the documentation and/or other materials provided
#     with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

set_include_path(implode(PATH_SEPARATOR, array(
	get_include_path(),
	'/usr/share/yubikey-val',
	'/etc/yubico/val',
)));

require_once 'ykval-synclib.php';
require_once 'ykval-config.php';
require_once 'ykval-log.php';

// FIXME
// don't die if db connection goes away
//	(e.g. during mysql restart or upgrade).

$sl = new SyncLib('ykval-queue:synclib');

if ($sl->getNumberOfServers() === 0 && $sl->getQueueLength() === 0)
{
	$sl->log(LOG_NOTICE, 'server sync pool is empty and sync queue is also empty.');
	$sl->log(LOG_NOTICE, 'configuration looks like a single node setup.');
	$sl->log(LOG_NOTICE, 'ykval-queue daemon terminating.');
	exit(0);
}

# Loop forever and resync
do {
	$start = time();
	$sl->reSync($baseParams['__YKVAL_SYNC_OLD_LIMIT__'],
                $baseParams['__YKVAL_SYNC_RESYNC_TIMEOUT__']);
	$duration = time() - $start;
	$sleep_time = max($baseParams['__YKVAL_SYNC_INTERVAL__'] - $duration, 0);
} while(sleep($sleep_time)==0);