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<?php |
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namespace Vanderlee\Comprehend\builder; |
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use Vanderlee\Comprehend\Core\Context; |
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use Vanderlee\Comprehend\Match\Success; |
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use Vanderlee\Comprehend\Parser\Parser; |
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/** |
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* Description of Factory |
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* |
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* @author Martijn |
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*/ |
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class Implementation extends Parser |
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{ |
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/** |
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* @var Parser|callable|null |
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*/ |
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public $parser = null; |
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/** |
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* @var callable|null |
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*/ |
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public $validator = null; |
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/** |
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* @var callable|null |
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*/ |
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public $processor = null; |
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public $processorKey = null; |
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/** |
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* @var Definition |
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*/ |
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private $definition = null; |
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private $arguments = null; |
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public function __construct(Definition &$definition, array $arguments = []) |
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{ |
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$this->definition = $definition; |
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$this->arguments = $arguments; |
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} |
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/** |
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* @throws \Exception |
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*/ |
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private function build() |
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{ |
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if ($this->parser === null) { |
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$this->parser = $this->definition->generator; |
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if (!$this->parser instanceof Parser) { |
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if (!is_callable($this->parser)) { |
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throw new \Exception('Parser not defined'); |
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} |
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$this->parser = ($this->parser)(...$this->arguments); |
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} |
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} |
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} |
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/** |
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* @param string $input |
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* @param int $offset |
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* @param Context $context |
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* @return \Vanderlee\Comprehend\Match\Failure|\Vanderlee\Comprehend\Match\Match|Success |
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* @throws \Exception |
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*/ |
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protected function parse(&$input, $offset, Context $context) |
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{ |
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$this->build(); |
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$match = $this->parser->parse($input, $offset, $context); |
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$localResults = []; // this is redundant, but suppresses PHP scanner warnings |
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if ($match->match) { |
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$localResults = $match->results; |
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if (!empty($this->definition->validators)) { |
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$text = substr($input, $offset, $match->length); |
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foreach ($this->definition->validators as $validator) { |
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if (!($validator)($text, $localResults)) { |
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return $this->failure($input, $offset, $match->length); |
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} |
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} |
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} |
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} |
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// Copy match into new match, only pass original callbacks if processor not set |
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$successes = empty($this->definition->processors) ? $match : []; |
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$match = ($match instanceof Success) |
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? $this->success($input, $offset, $match->length, $successes) |
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: $this->failure($input, $offset, $match->length); |
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if ($match instanceof Success && !empty($this->definition->processors)) { |
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foreach ($this->definition->processors as $key => $processor) { |
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$match->addResultCallback(function (&$results) use ($key, $processor, $localResults) { |
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$results[$key] = $processor($localResults, $results); |
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}); |
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} |
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} |
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return $match; |
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} |
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public function __toString() |
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{ |
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try { |
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$this->build(); |
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} catch (\Exception $e) { |
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// ignore |
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} |
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return (string)$this->parser; |
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} |
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} |
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vanderlee /
Comprehend
