/**
* 执行签到
* @param string $act 活动token
* @param string $user openId
* @return int 签到排名，失败返回false
*/
public static function checkin($act, $user, $nickname)
{
$item = array('openid' => $user, 'time' => date("Y-m-d H:i:s", time()), 'nickname' => $nickname);
$cache = Vera_Cache::getInstance();
$key = 'rollcall_' . $act . '_list';
$rank = false;
do {
$list = $cache->get($key, NULL, $cas);
//使用Memcached特性cas，保证高并发时的准确性
if ($cache->getResultCode() == Memcached::RES_NOTFOUND) {
if ($list = Library_File::load($act)) {
if (!($rank = self::getRank($list, $user))) {
$list[] = $item;
$rank = count($list);
}
$newList = $list;
} else {
$newList = array($item);
//两层Array
$rank = 1;
}
$cache->add($key, $newList, 86400);
//原子性的插入，签到记录的缓存保存二十四小时
} else {
if (!($rank = self::getRank($list, $user))) {
$list[] = $item;
$cache->cas($cas, $key, $list);
$rank = count($list);
}
}
} while ($cache->getResultCode() != Memcached::RES_SUCCESS);
return $rank;
}
public function run()
{
$acts = self::getActs();
$cache = Vera_Cache::getInstance();
foreach ($acts as $act) {
$key = 'rollcall_' . $act['md5'] . '_list';
if ($list = $cache->get($key)) {
Library_File::write($act['md5'], $list);
}
}
return true;
}
/**
* 获取签到结果
* @param string $act 活动token
* @return array 签到结果数组
*/
public static function getCheckinList($act)
{
$cache = Vera_Cache::getInstance();
$key = 'rollcall_' . $act . '_list';
$list = $cache->get($key);
if ($cache->getResultCode() == Memcached::RES_NOTFOUND) {
if (!($list = Library_File::load($act))) {
return false;
}
//无需set载入的结果，有人checkin的时候自然会set
}
return $list;
}