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<?php |
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namespace Kaliop\eZMigrationBundle\Core\ReferenceResolver; |
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/** |
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* A class which eases creating reference resolvers based on prefix strings. |
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*/ |
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abstract class PrefixBasedResolver implements PrefixBasedResolverInterface |
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{ |
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/// To be set by subclasses at constructor time or in definition |
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protected $referencePrefixes = array(); |
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private $prefixMatchRegexp; |
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/** |
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* NB: always call this from constructor of subclasses! |
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*/ |
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public function __construct() |
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{ |
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$quotedPrefixes = []; |
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foreach ($this->referencePrefixes as $prefix) { |
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$quotedPrefixes[] = preg_quote($prefix, '/'); |
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} |
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$this->prefixMatchRegexp = '/^(' . implode('|', $quotedPrefixes) . ')/'; |
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} |
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public function getRegexp() |
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{ |
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return $this->prefixMatchRegexp; |
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} |
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/** |
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* @param string $stringIdentifier |
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* @return bool |
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*/ |
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public function isReference($stringIdentifier) |
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{ |
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if (!is_string($stringIdentifier)) { |
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return false; |
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} |
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return (bool)preg_match($this->prefixMatchRegexp, $stringIdentifier); |
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} |
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public function resolveReference($stringIdentifier) |
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{ |
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if ($this->isReference($stringIdentifier)) { |
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return $this->getReferenceValue($stringIdentifier); |
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} |
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return $stringIdentifier; |
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} |
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/** |
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* @param string $stringIdentifier |
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* @return mixed |
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*/ |
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abstract public function getReferenceValue($stringIdentifier); |
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/** |
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* Returns the value-identifying part of the reference identifier, stripped of its prefix. |
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* Useful for subclasses with a single $referencePrefixes |
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* |
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* @param string $stringIdentifier |
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* @return string |
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*/ |
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protected function getReferenceIdentifier($stringIdentifier) |
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{ |
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return preg_replace($this->prefixMatchRegexp, '', $stringIdentifier); |
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} |
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/** |
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* Useful for subclasses with many $referencePrefixes |
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* |
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* @param string $stringIdentifier |
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* @return array with 2 keys, 'prefix' and 'identifier' |
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* @throws \Exception |
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*/ |
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protected function getReferenceIdentifierByPrefix($stringIdentifier) |
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{ |
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foreach ($this->referencePrefixes as $prefix) { |
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$regexp = '/^' . preg_quote($prefix, '/') . '/'; |
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if (preg_match($regexp, $stringIdentifier)) { |
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return array('prefix' => $prefix, 'identifier' => preg_replace($regexp, '', $stringIdentifier)); |
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} |
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} |
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throw new \Exception("Can not match reference with identifier '$stringIdentifier'"); |
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} |
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} |
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kaliop-uk /
ezmigrationbundle
