/**
* Calculate a single player new elo
*
* @param User $user
* @param int $opponentElo
* @param int $win
* @return int
*/
protected function calculateUserElo(User $user, $opponentElo, $win)
{
$score = $this->calculateScore($win);
$expected = $this->calculateExpected($user->getElo(), $opponentElo);
$kFactor = $this->nbRatedGamesToKfactor($user->getNbRatedGames());
$difference = 2 * $kFactor * ($score - $expected);
return round($user->getElo() + $difference);
}
/**
* Get the rank of the user starting from 1 (better)
*
* @return int
**/
public function getUserRank(User $user)
{
return $this->createQueryBuilder()->field('elo')->gt($user->getElo())->getQuery()->count() + 1;
}
/**
* Sets: Optional registered user who owns the hook
*
* @param User user
*/
public function setUser(User $user)
{
$this->user = $user;
$this->username = $user->getUsername();
$this->elo = $user->getElo();
$this->engine = $user->isEngine();
}
/**
* Get the rank of the user starting from 1 (better)
*
* @return int
**/
public function getUserRank(User $user)
{
return $this->createEnabledQueryBuilder()->field('elo')->gt($user->getElo())->hint(array('elo' => -1))->getQuery()->count() + 1;
}
