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<?php |
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namespace MeadSteve\DiceApi; |
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use MeadSteve\DiceApi\Dice\Factories\DiceFactory; |
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use MeadSteve\DiceApi\Dice\Factories\NumericDiceFactory; |
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use MeadSteve\DiceApi\Dice\Factories\SpecialDiceFactory; |
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use MeadSteve\DiceApi\Dice\UncreatableDiceException; |
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class UrlDiceGenerator |
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{ |
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/** |
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* @var DiceFactory |
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*/ |
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private $diceFactories = []; |
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public function __construct() |
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{ |
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$this->diceFactories[] = new NumericDiceFactory(); |
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$this->diceFactories[] = new SpecialDiceFactory(); |
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} |
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public function diceFromUrlString($urlString) |
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{ |
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$parts = explode("/", $urlString); |
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$parts = array_filter($parts, [$this, 'notBlank']); |
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$diceSets = array_map([$this, 'getDiceForPart'], $parts); |
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return $this->flattenDiceSets($diceSets); |
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} |
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/** |
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* @param string $part |
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* |
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* @throws UncreatableDiceException |
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* |
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* @return Dice[] |
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*/ |
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private function getDiceForPart($part) |
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{ |
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$data = $this->parseDiceString($part); |
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foreach ($this->diceFactories as $factory) { |
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if ($factory->handlesType($data["type"])) { |
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return $factory->buildDice($data["type"], $data["count"]); |
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} |
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} |
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throw new UncreatableDiceException("No idea how to make a d{$data['type']}"); |
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} |
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/** |
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* @param array[] |
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* @return array |
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*/ |
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private function flattenDiceSets($diceSets) |
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{ |
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$dice = []; |
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foreach ($diceSets as $set) { |
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$dice = array_merge($dice, $set); |
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} |
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return $dice; |
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} |
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/** |
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* @param string $part |
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* @return array |
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*/ |
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private function parseDiceString($part) |
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{ |
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$data = []; |
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$valid = preg_match("/(?P<count>[0-9]+)?d(?P<type>[^\/]+)/i", $part, $data); |
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if (!$valid) { |
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throw new UncreatableDiceException("Problem creating dice from incorrectly formated data: " . $part); |
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} |
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if (!$data["count"]) { |
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$data["count"] = 1; |
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} |
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return $data; |
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} |
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private function notBlank($string) |
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{ |
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return $string !== ""; |
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} |
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} |
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