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<?php |
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use Phinx\Migration\AbstractMigration; |
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class PlayerEloCalculations extends AbstractMigration |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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public function up() |
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{ |
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$kernel = new AppKernel('prod', false); |
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$kernel->boot(); |
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$qb = new MatchQueryBuilder('Match', [ |
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'columns' => [ |
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'team_a_players' => 'team_a_players', |
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'team_b_players' => 'team_b_players', |
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'timestamp' => 'timestamp', |
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], |
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]); |
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$query = $qb |
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->where('team_a_players')->isNotNull() |
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->where('team_a_players')->notEquals('') |
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->where('team_b_players')->isNotNull() |
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->where('team_b_players')->notEquals('') |
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->sortBy('timestamp') |
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->limit(1000) |
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; |
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$pageCount = $query->countPages(); |
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$lastSeason = []; |
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for ($i = 1; $i <= $pageCount; $i++) { |
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$matches = $query |
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->fromPage($i) |
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->getModels($fast = true) |
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; |
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/** @var Match $match */ |
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foreach ($matches as $match) { |
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$seasonInfo = Season::getSeason($match->getTimestamp()); |
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// Clear the model cache every season since Elos are cached internally |
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if ($seasonInfo != $lastSeason) { |
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$lastSeason = $seasonInfo; |
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Service::getModelCache()->clear(); |
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} |
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$teamA = $match->getTeamAPlayers(); |
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$teamB = $match->getTeamBPlayers(); |
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if (empty($teamA) || empty($teamB)) { |
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continue; |
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} |
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$getElo = function($n) use ($seasonInfo) { |
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/** @var Player $n */ |
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return $n->getElo($seasonInfo['season'], $seasonInfo['year']); |
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}; |
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$teamA_Avg = array_sum(array_map($getElo, $teamA)) / count($teamA); |
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$teamB_Avg = array_sum(array_map($getElo, $teamB)) / count($teamB); |
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$diff = Match::calculateEloDiff( |
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$teamA_Avg, $teamB_Avg, $match->getTeamAPoints(), $match->getTeamBPoints(), $match->getDuration() |
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); |
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// We need to disable transactions so our Player::adjustElo() fxn won't hold up execution |
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$this->getAdapter()->commitTransaction(); |
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$this->query("UPDATE matches SET player_elo_diff = {$diff} WHERE id = {$match->getId()} LIMIT 1;"); |
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$walkFxn = function ($v, $k, $positive) use ($diff, $match, &$batch, $seasonInfo) { |
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/** @var Player $v */ |
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$eloDiff = ($positive) ? $diff : -$diff; |
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if ($v->isValid()) { |
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$v->adjustElo($eloDiff, $match); |
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} |
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}; |
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array_walk($teamA, $walkFxn, true); |
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array_walk($teamB, $walkFxn, false); |
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$this->getAdapter()->beginTransaction(); |
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} |
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} |
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} |
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public function down() |
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{ |
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$seasonElos = $this->table('player_elo'); |
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$seasonElos->truncate(); |
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} |
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} |
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allejo /
bzion
