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<?php |
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namespace Kata\BowlingKata; |
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final class BowlingGame |
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{ |
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const FRAME_SCORE = 10; |
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const MAX_FRAMES = 10; |
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private $total_game_score = 0; |
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private $frames = []; |
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private $current_frame = 0; |
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private $rolls = []; |
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private $current_roll = 0; |
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public function __invoke(array $rolls) : int |
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{ |
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$this->rolls = $rolls; |
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$this->checkRolls(); |
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return $this->calculateTotalScore(); |
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} |
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private function checkRolls() |
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{ |
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foreach ($this->rolls as $roll_order => $roll_mark) |
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{ |
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$current_roll_full_score = $this->calculateFullRollScore($roll_mark, $roll_order); |
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$this->frames[$this->current_frame][] = $current_roll_full_score; |
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if ($this->current_frame < self::MAX_FRAMES) |
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{ |
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$this->total_game_score += $current_roll_full_score; |
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} |
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if ($this->isSecondTryInFrame() || RollValue::STRIKE == $roll_mark || RollValue::SPARE == $roll_mark) |
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{ |
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$this->current_frame++; |
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} |
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$this->current_roll++; |
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} |
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} |
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private function calculateSimpleRollScore($roll_mark, $roll_order):int |
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{ |
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if ($roll_mark == RollValue::SPARE) |
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{ |
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return self::FRAME_SCORE - $this->rolls[$roll_order - 1]; |
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} |
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return RollValue::fromChar($roll_mark)->value(); |
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} |
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private function calculateFullRollScore($roll_mark, $roll_order) |
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{ |
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$current_roll_simple_score = $this->calculateSimpleRollScore($roll_mark, $roll_order); |
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if (!in_array($roll_mark, [RollValue::SPARE, RollValue::STRIKE])) |
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{ |
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return $current_roll_simple_score; |
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} |
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if ($roll_mark == RollValue::SPARE) |
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{ |
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$current_roll_simple_score += (!empty($this->rolls[$roll_order + 1])) ? $this->calculateSimpleRollScore($this->rolls[$roll_order + 1], $roll_order + 1) : 0; |
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return $current_roll_simple_score; |
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} |
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if ($roll_mark == RollValue::STRIKE) |
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{ |
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$current_roll_simple_score += (!empty($this->rolls[$roll_order + 1])) ? $this->calculateSimpleRollScore($this->rolls[$roll_order + 1], $roll_order + 1) : 0; |
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$current_roll_simple_score += (!empty($this->rolls[$roll_order + 2])) ? $this->calculateSimpleRollScore($this->rolls[$roll_order + 2], $roll_order + 2) : 0; |
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return $current_roll_simple_score; |
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} |
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throw new \InvalidArgumentException($roll_mark . ' is an invalid roll.'); |
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} |
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private function calculateTotalScore() : int |
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{ |
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return $this->total_game_score; |
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} |
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private function isSecondTryInFrame() |
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{ |
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return 2 == count($this->frames[$this->current_frame]); |
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} |
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} |
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uvinum /
php-kata-env
