<?php
/**
 * 在线统计插件
 * @copyright (c) xiaosong.org All Rights Reserved
 */
if(!defined('EMLOG_ROOT')) {exit('error!');}

function callback_init(){
	$DB = MySql::getInstance();
	$is_exist_online_query = $DB->query('show tables like "'.DB_PREFIX.'online2"');
	$is_exist_maxonline_query = $DB->query('show tables like "'.DB_PREFIX.'maxonline"');
	$is_exist_option = $DB->query("SELECT 1 FROM ".DB_PREFIX."options WHERE option_name='maxOnline'");
	$dbcharset = 'utf8';
	$type = 'MYISAM';
	$add = $DB->getMysqlVersion() > '4.1' ? "ENGINE=".$type." DEFAULT CHARSET=".$dbcharset.";":"TYPE=".$type.";";
	if ($DB->num_rows($is_exist_online_query) == 0) {
		$sql_online = "
CREATE TABLE `".DB_PREFIX."online2` (
`id` int(10) unsigned NOT NULL auto_increment,
`ip` varchar(128) NOT NULL default '',
`dt` timestamp NOT NULL default CURRENT_TIMESTAMP,
`useragent` varchar(255) NOT NULL default '',
PRIMARY KEY  (`id`),
UNIQUE KEY `ip` (`ip`)
)".$add;
		$DB->query($sql_online);
	}
	if ($DB->num_rows($is_exist_maxonline_query) != 0) {
		$res_max = $DB->once_fetch_array("SELECT maximum, DATE(dt) AS maxDate FROM ".DB_PREFIX."maxonline");
		$timeUTC = emStrtotime($res_max["maxDate"]);
		$cacheData = serialize(array('maximum' => $res_max["maximum"], 'maxDate' => $timeUTC));
		$CACHE = Cache::getInstance();
		$CACHE->cacheWrite($cacheData, 'maxOnline');
		$query = $DB->query("DROP TABLE IF EXISTS ".DB_PREFIX."maxonline");
	}
	if (!$DB->num_rows($is_exist_option)) {
		$DB->query("INSERT INTO ".DB_PREFIX."options (option_name, option_value) VALUES('maxOnline', '".serialize(array('maximum' => 0, 'maxDate' => time()))."')");
	}
	$cachefile = EMLOG_ROOT . '/content/cache/maxOnline.php';
	if (file_exists($cachefile) && filesize($cachefile) > 0) {
		$data = file_get_contents($cachefile);
		$data = str_replace("<?php exit;//", '', $data);
		Option::updateOption('maxOnline', $data);
		unlink($cachefile);
	}
}

function callback_rm(){
	$DB = MySql::getInstance();
	$query = $DB->query("DROP TABLE IF EXISTS ".DB_PREFIX."online2");
}
?>