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<?php |
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namespace Bourdeau\Bundle\HandEvaluatorBundle\HandEvaluator; |
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/** |
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* Hand Evaluator for Poker. |
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* |
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* @author Pierre-Henri Bourdeau <[email protected]> |
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*/ |
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class WinnerFinder |
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{ |
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private $handFinder; |
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/** |
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* Constructor. |
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* |
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* @param HandFinder $handFinder |
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*/ |
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public function __construct(HandFinder $handFinder) |
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{ |
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$this->handFinder = $handFinder; |
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} |
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/** |
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* Get a winner. |
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* |
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* @param array $players A simple array with key as Player Name and value |
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* as the cards. |
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* |
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* @return array |
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*/ |
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public function findAWinner(array $players) |
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{ |
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$playerRanks = [ |
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'winners' => [], |
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'other_players' => [], |
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]; |
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foreach ($players as $playerName => $cards) { |
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//@todo should one care about the given card? I remove them for now |
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$players[$playerName] = $this->handFinder->findhand($cards); |
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// We do not have a winner yet |
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if (count($playerRanks['winners']) == 0) { |
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$playerRanks['winners'] = [$playerName => $players[$playerName]]; |
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} |
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// If we already have a winner it must be challenged with other players |
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if (count($playerRanks['winners']) > 0 && key($playerRanks['winners']) !== $playerName) { |
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if ($newWinner = $this->challengeTheWinner($playerRanks['winners'], [$playerName => $players[$playerName]])) { |
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$playerRanks['winners'] = $newWinner; |
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} |
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} |
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} |
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foreach ($playerRanks['winners'] as $winner => $data) { |
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unset($players[$winner]); |
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} |
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$playerRanks['other_players'] = $players; |
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return $playerRanks; |
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} |
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/** |
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* Return the new winner if it beats the current one. |
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* |
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* @param array $currentWinners |
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* @param array $challenger |
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* |
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* @return array|bool |
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*/ |
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private function challengeTheWinner(array $currentWinners, array $challenger) |
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{ |
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$currentChallenger = current($challenger); |
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foreach ($currentWinners as $currentWinnerName => $currentWinner) { |
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// Current player hand rank is higher than current winner |
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if ($currentWinner['hand_rank'] < $currentChallenger['hand_rank']) { |
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return $challenger; |
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} |
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$equalHandRank = $currentWinner['hand_rank'] == $currentChallenger['hand_rank']; |
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// Current player hand rank is equal to current winner but it's card ranks is higher |
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if ($equalHandRank && $currentWinner['card_rank'] < $currentChallenger['card_rank']) { |
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return $challenger; |
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} |
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// Players are equaly ranked, it's a dead heat. We return both players |
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if ($equalHandRank && $currentWinner['card_rank'] == $currentChallenger['card_rank']) { |
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return array_merge($currentWinners, $challenger); |
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} |
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} |
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return false; |
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} |
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} |
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bourdeau /
handevaluator-bundle
