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<?php |
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namespace TournamentGenerator\Preset; |
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/** |
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* |
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*/ |
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class DoubleElimination extends \TournamentGenerator\Tournament |
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{ |
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public function generate() { |
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$this->allowSkip(); |
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$countTeams = count($this->getTeams()); |
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if ($countTeams < 3) throw new \Exception('Double elimination is possible for minimum of 3 teams - '.$countTeams.' teams given.'); |
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// CALCULATE BYES |
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$nextPow = 0; |
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$byes = $this->calcByes($countTeams, $nextPow); |
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$startRound = $this->round('Start round'); |
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$roundsNum = log($nextPow, 2)*2; |
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$startGroups = ($countTeams+$byes)/2; |
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$previousGroups = []; |
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$previousLosingGroups = []; |
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$groupIds = []; |
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$allGroups = []; |
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for ($i=1; $i <= $startGroups; $i++) { |
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$g = $startRound->group('Start group - '.$i)->setInGame(2)->setType(\TournamentGenerator\Constants::ROUND_TWO); |
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$allGroups[] = $g; |
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$groupIds[] = $g->getId(); |
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$previousGroups[] = $g; |
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} |
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// SPLIT TEAMS EVENLY |
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$this->splitTeams(); |
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for ($r=2; $r <= $roundsNum-1; $r++) { |
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$groups = []; |
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$losingGroups = []; |
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$round = $this->round('Round '.$r); |
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// GENERATE GROUPS AND PROGRESSIONS |
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// GENERATING LOSING AND WINNING SIDE |
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$lastLosingGroup = $this->generateLosingSide($r, $round, $allGroups, $previousLosingGroups, $previousGroups, $losingGroups); |
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$this->generateWinSide($r, $byes, $countTeams, $round, $allGroups, $groups, $lastWinningGroup, $previousGroups); |
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$previousGroups = $groups; |
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$previousLosingGroups = $losingGroups; |
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} |
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// LAST ROUND |
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$round = $this->round('Round '.$roundsNum.' - Finale'); |
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$groupFinal = $round->group('Round '.$r.' - finale')->setInGame(2)->setType(\TournamentGenerator\Constants::ROUND_TWO)->setOrder(1); |
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$allGroups[] = $groupFinal; |
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$lastLosingGroup->progression($groupFinal, 0, 1); |
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$lastWinningGroup->progression($groupFinal, 0, 1); |
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// REPEAT GROUP IF LOSING TEAM WON |
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$group = $round->group('Round '.$r.' - finale (2)')->setInGame(2)->setType(\TournamentGenerator\Constants::ROUND_TWO)->setOrder(1); |
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$twoLoss = new \TournamentGenerator\TeamFilter('losses', '=', 1, $allGroups); |
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$groupFinal->progression($group, 0, 2)->addFilter($twoLoss); |
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return $this; |
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} |
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private function calcByes(int $countTeams, int &$nextPow) { |
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$byes = 0; |
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$nextPow = $countTeams; |
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if ( !\TournamentGenerator\isPowerOf2($countTeams) ) { |
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$nextPow = bindec(str_pad(1, strlen(decbin($countTeams))+1, 0, STR_PAD_RIGHT)); |
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$byes = $nextPow-$countTeams; |
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} |
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return $byes; |
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} |
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private function generateWinSide(int &$r, int &$byes, int &$countTeams, \TournamentGenerator\Round &$round, array &$allGroups, array &$groups, \TournamentGenerator\Group &$lastWinningGroup = null, array &$previousGroups = []) { |
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$order = 1; |
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for ($g=1; $g <= (($countTeams+$byes)/pow(2, $r)); $g++) { |
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$group = $round->group('Round '.$r.' - win '.$g)->setInGame(2)->setType(\TournamentGenerator\Constants::ROUND_TWO)->setOrder($order); |
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$allGroups[] = $group; |
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$order += 2; |
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$groups[] = $group; |
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$lastWinningGroup = $group; // KEEP THE LAST GROUP FOR FINALE |
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$previousGroups[2*($g-1)]->progression($group, 0, 1); // PROGRESS FROM GROUP BEFORE |
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$previousGroups[(2*($g-1))+1]->progression($group, 0, 1); // PROGREESS FROM GROUP BEFORE |
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} |
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return $this; |
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} |
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private function generateLosingSide(int &$r, \TournamentGenerator\Round &$round, array &$allGroups, array &$previousLosingGroups = [], array &$previousGroups = [], array &$losingGroups = []) { |
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$losingGroupTeamsCount = count($previousLosingGroups)+count($previousGroups); |
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$order = 2; |
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if (\TournamentGenerator\isPowerOf2($losingGroupTeamsCount)) { // IF THE NUMBER OF TEAMS IS A POWER OF 2, GENERATE GROUPS WITHOUT BYES |
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for ($g=1; $g <= $losingGroupTeamsCount/2; $g++) { |
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$group = $round->group('Round '.$r.' - loss '.$g)->setInGame(2)->setType(\TournamentGenerator\Constants::ROUND_TWO)->setOrder($order); |
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$allGroups[] = $group; |
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$order += 2; |
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$losingGroups[] = $group; |
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$lastLosingGroup = $group; // KEEP THE LAST GROUP FOR FINALE |
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if ($r === 2) { // FIRST LOSING ROUND |
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$previousGroups[2*($g-1)]->progression($group, 1, 1); // PROGRESS FROM STARTING GROUP |
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$previousGroups[(2*($g-1))+1]->progression($group, 1, 1); // PROGREESS FROM STARTING GROUP |
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} |
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elseif ($losingGroupTeamsCount >= 2) { |
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$previousLosingGroups[$g-1]->progression($group, 0, 1); // PROGRESS FROM LOSING GROUP BEFORE |
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if (isset(array_reverse($previousGroups)[$g-1])) array_reverse($previousGroups)[$g-1]->progression($group, 1, 1); // PROGREESS FROM WINNING GROUP BEFORE |
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else $previousLosingGroups[$g]->progression($group, 0, 1); // PROGRESS OTHER TEAM FROM LOSING GROUP BEEFORE |
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} |
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} |
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} |
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else { // IF THE NUMBER OF TEAMS IS NOT A POWER OF 2, GENERATE GROUPS WITH BYES |
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// LOOK FOR THE CLOSEST LOWER POWER OF 2 |
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$losingByes = $losingGroupTeamsCount-bindec(str_pad(1, strlen(decbin($losingGroupTeamsCount)), 0, STR_PAD_RIGHT)); |
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$n = (floor(count($previousLosingGroups)/2)+$losingByes); |
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$byesGroupsNums = []; |
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$byesProgressed = 0; |
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for ($i=0; $i < $losingByes; $i++) { |
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$byesGroupsNums[] = $n-($i*2); |
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} |
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$lastGroup = 0; |
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for ($g=1; $g <= ((count($previousLosingGroups)/2)+$losingByes); $g++) { |
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$group = $round->group('Round '.$r.' - loss '.$g)->setInGame(2)->setType(\TournamentGenerator\Constants::ROUND_TWO)->setOrder($order); |
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$allGroups[] = $group; |
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$order += 2; |
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$losingGroups[] = $group; |
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$lastLosingGroup = $group; // KEEP THE LAST GROUP FOR FINALE |
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if (in_array($g, $byesGroupsNums) && isset($previousGroups[$byesProgressed])) { // EMPTY GROUP FROM BYE |
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$previousGroups[$byesProgressed]->progression($group, 1, 1); // PROGRESS FROM WINNING GROUP BEFORE |
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$byesProgressed++; |
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} |
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else { |
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$previousLosingGroups[$lastGroup]->progression($group, 0, 1); // PROGRESS FROM LOSING GROUP BEFORE |
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if (isset($previousLosingGroups[$lastGroup + 1])) $previousLosingGroups[$lastGroup + 1]->progression($group, 0, 1); // PROGREESS FROM LOSING GROUP BEFORE |
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$lastGroup += 2; |
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} |
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} |
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} |
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return $lastLosingGroup; |
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} |
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} |
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Heroyt /
tournament-generator
