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<?php |
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namespace SmartWeb\ModuleTesting\ExpressionLanguage; |
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use Closure; |
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use InvalidArgumentException; |
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use ReflectionMethod; |
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use SmartWeb\ModuleTesting\Contracts\ExpressionLanguage\Validator; |
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/** |
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* Class CallbackValidator |
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* |
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* @package SmartWeb\ModuleTesting\ExpressionLanguage |
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*/ |
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class CallbackValidator implements Validator |
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{ |
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/** |
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* @var callable|Closure |
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*/ |
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private $callback; |
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/** |
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* @var string |
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*/ |
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private $expectation; |
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/** |
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* @inheritDoc |
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*/ |
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public function __construct(string $expectation) |
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{ |
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$this->expectation = $expectation; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function validate($callback) |
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{ |
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$this->callback = $callback; |
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$this->validateCallback(); |
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} |
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protected function validateCallback() |
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{ |
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$this->callback = $this->parseCallback(); |
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if ($this->callbackIsInvalid()) { |
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throw new InvalidArgumentException($this->expectation . $this->getInvalidCallbackMessage()); |
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} |
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} |
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/** |
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* @return callable|Closure |
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*/ |
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protected function parseCallback() |
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{ |
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return is_array($this->callback) |
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? get_class($this->callback[0]) . '::' . $this->callback[1] |
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: $this->callback; |
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} |
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/** |
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* @return bool |
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*/ |
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protected function callbackIsInvalid() |
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{ |
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return !$this->callbackIsValid(); |
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} |
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/** |
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* @return bool |
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*/ |
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protected function callbackIsValid() |
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{ |
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return is_callable($this->callback) || ($this->callback instanceof Closure); |
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} |
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/** |
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* @return string |
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*/ |
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protected function getInvalidCallbackMessage() : string |
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{ |
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return $this->callbackIsAccessible() |
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? "; was: '{$this->callback}'" |
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: ", cannot access private method {$this->callback}()"; |
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} |
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/** |
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* @return bool |
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*/ |
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protected function callbackIsAccessible() : bool |
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{ |
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$method = new ReflectionMethod($this->callback); |
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return $method->isPublic() && !$method->isAbstract(); |
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} |
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} |
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