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<?php |
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/** |
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* @package s9e\RegexpBuilder |
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* @copyright Copyright (c) 2016 The s9e Authors |
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License |
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*/ |
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namespace s9e\RegexpBuilder\Passes; |
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abstract class AbstractPass implements PassInterface |
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{ |
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/** |
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* @var bool Whether the current set of strings is optional |
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*/ |
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protected $isOptional; |
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/** |
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* {@inheritdoc} |
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*/ |
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public function run(array $strings) |
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{ |
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$strings = $this->beforeRun($strings); |
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if ($this->canRun($strings)) |
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{ |
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$strings = $this->runPass($strings); |
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} |
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$strings = $this->afterRun($strings); |
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return $strings; |
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} |
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/** |
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* Process the list of strings after the pass is run |
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* |
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* @param array[] $strings |
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* @return array[] |
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*/ |
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protected function afterRun(array $strings) |
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{ |
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if ($this->isOptional && $strings[0] !== []) |
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{ |
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array_unshift($strings, []); |
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} |
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return $strings; |
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} |
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/** |
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* Prepare the list of strings before the pass is run |
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* |
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* @param array[] $strings |
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* @return array[] |
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*/ |
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protected function beforeRun(array $strings) |
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{ |
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$this->isOptional = (isset($strings[0]) && $strings[0] === []); |
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if ($this->isOptional) |
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{ |
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array_shift($strings); |
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} |
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return $strings; |
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} |
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/** |
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* Test whether this pass can be run on a given list of strings |
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* |
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* @param array[] $strings |
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* @return bool |
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*/ |
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protected function canRun(array $strings) |
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{ |
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return true; |
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} |
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/** |
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* Run this pass on a list of strings |
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* |
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* @param array[] $strings |
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* @return array[] |
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*/ |
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abstract protected function runPass(array $strings); |
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/** |
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* Test whether given string contains a single value |
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* |
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* @param array $string |
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* @return bool |
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*/ |
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protected function isSingleCharString(array $string) |
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{ |
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return (count($string) === 1 && !is_array($string[0])); |
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} |
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} |
s9e /
RegexpBuilder
