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<?php |
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/* |
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* This file is part of the FOSElasticaBundle package. |
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* |
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* (c) FriendsOfSymfony <http://friendsofsymfony.github.com/> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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/** |
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* This file is part of the FOSElasticaBundle project. |
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* |
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* (c) FriendsOfSymfony <https://github.com/FriendsOfSymfony/FOSElasticaBundle/graphs/contributors> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace FOS\ElasticaBundle\Provider; |
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use Symfony\Component\ExpressionLanguage\Expression; |
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use Symfony\Component\ExpressionLanguage\ExpressionLanguage; |
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use Symfony\Component\ExpressionLanguage\SyntaxError; |
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class Indexable implements IndexableInterface |
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{ |
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/** |
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* An array of raw configured callbacks for all types. |
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* |
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* @var array |
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*/ |
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private $callbacks = []; |
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/** |
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* An instance of ExpressionLanguage. |
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* |
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* @var ExpressionLanguage |
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*/ |
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private $expressionLanguage; |
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/** |
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* An array of initialised callbacks. |
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* |
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* @var array |
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*/ |
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private $initialisedCallbacks = []; |
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public function __construct(array $callbacks) |
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{ |
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$this->callbacks = $callbacks; |
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} |
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/** |
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* Return whether the object is indexable with respect to the callback. |
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* |
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* @param string $indexName |
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* @param string $typeName |
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* @param mixed $object |
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* |
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* @return bool |
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*/ |
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public function isObjectIndexable($indexName, $typeName, $object) |
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{ |
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$type = sprintf('%s/%s', $indexName, $typeName); |
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$callback = $this->getCallback($type, $object); |
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if (!$callback) { |
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return true; |
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} |
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if ($callback instanceof Expression) { |
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return (bool) $this->getExpressionLanguage()->evaluate($callback, [ |
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'object' => $object, |
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$this->getExpressionVar($object) => $object, |
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]); |
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} |
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return is_string($callback) |
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? call_user_func([$object, $callback]) |
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: call_user_func($callback, $object); |
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} |
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/** |
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* Builds and initialises a callback. |
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* |
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* @param string $type |
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* @param object $object |
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* |
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* @return callable|string|ExpressionLanguage|null |
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*/ |
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private function buildCallback($type, $object) |
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{ |
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if (!array_key_exists($type, $this->callbacks)) { |
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return null; |
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} |
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$callback = $this->callbacks[$type]; |
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if (is_callable($callback) or is_callable([$object, $callback])) { |
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return $callback; |
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} |
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if (is_string($callback)) { |
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return $this->buildExpressionCallback($type, $object, $callback); |
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} |
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throw new \InvalidArgumentException(sprintf('Callback for type "%s" is not a valid callback.', $type)); |
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} |
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/** |
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* Processes a string expression into an Expression. |
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* |
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* @param string $type |
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* @param mixed $object |
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* @param string $callback |
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* |
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* @return Expression |
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*/ |
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private function buildExpressionCallback($type, $object, $callback) |
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{ |
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$expression = $this->getExpressionLanguage(); |
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if (!$expression) { |
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throw new \RuntimeException('Unable to process an expression without the ExpressionLanguage component.'); |
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} |
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try { |
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$callback = new Expression($callback); |
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$expression->compile($callback, [ |
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'object', $this->getExpressionVar($object), |
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]); |
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return $callback; |
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} catch (SyntaxError $e) { |
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throw new \InvalidArgumentException(sprintf( |
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'Callback for type "%s" is an invalid expression', |
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$type |
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), $e->getCode(), $e); |
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} |
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} |
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/** |
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* Retreives a cached callback, or creates a new callback if one is not found. |
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* |
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* @param string $type |
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* @param object $object |
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* |
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* @return mixed |
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*/ |
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private function getCallback($type, $object) |
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{ |
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if (!array_key_exists($type, $this->initialisedCallbacks)) { |
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$this->initialisedCallbacks[$type] = $this->buildCallback($type, $object); |
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} |
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return $this->initialisedCallbacks[$type]; |
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} |
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/** |
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* Returns the ExpressionLanguage class if it is available. |
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* |
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* @return ExpressionLanguage|null |
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*/ |
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private function getExpressionLanguage() |
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{ |
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if (null === $this->expressionLanguage) { |
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$this->expressionLanguage = new ExpressionLanguage(); |
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} |
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return $this->expressionLanguage; |
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} |
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/** |
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* Returns the variable name to be used to access the object when using the ExpressionLanguage |
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* component to parse and evaluate an expression. |
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* |
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* @param mixed $object |
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* |
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* @return string |
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*/ |
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private function getExpressionVar($object = null) |
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{ |
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if (!is_object($object)) { |
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return 'object'; |
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} |
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$ref = new \ReflectionClass($object); |
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return strtolower($ref->getShortName()); |
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} |
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} |
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FriendsOfSymfony /
FOSElasticaBundle
