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<?php |
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namespace Abacaphiliac\Zend\Validator; |
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use JsonSchema\RefResolver; |
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use JsonSchema\Uri\UriResolver; |
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use JsonSchema\Uri\UriRetriever; |
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use JsonSchema\Validator; |
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use Zend\Json\Exception\RuntimeException; |
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use Zend\Json\Json; |
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use Zend\Validator\AbstractValidator; |
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use Zend\Validator\Exception; |
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class JsonSchema extends AbstractValidator |
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{ |
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/** @var string */ |
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private $file; |
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/** @var string[] */ |
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private $messages = array(); |
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/** @var string[] */ |
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private $errorKeys = array(); |
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/** @var string */ |
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private $messagePrefix = '['; |
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/** @var string */ |
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private $messageSuffix = ']'; |
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/** @var string */ |
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private $messageAttributeDelimiter = '] ['; |
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/** |
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* JsonSchema constructor. |
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* @param array|null|\Traversable $options |
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*/ |
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public function __construct($options = null) |
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{ |
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$this->errorKeys = array( |
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'property', |
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'constraint', |
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'message', |
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); |
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parent::__construct($options); |
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} |
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/** |
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* Returns true if and only if $value meets the validation requirements |
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* |
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* If $value fails validation, then this method returns false, and |
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* getMessages() will return an array of messages that explain why the |
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* validation failed. |
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* |
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* @param mixed $value |
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* @return bool |
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* @throws Exception\RuntimeException If validation of $value is impossible |
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*/ |
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public function isValid($value) |
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{ |
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$schema = $this->getSchema(); |
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try { |
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$decoded = $this->decodeValue($value); |
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} catch (RuntimeException $e) { |
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$this->messages = array( |
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$e->getMessage(), |
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); |
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return false; |
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} |
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$validator = new Validator(); |
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$validator->check($decoded, $schema); |
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if ($validator->isValid()) { |
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return true; |
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} |
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$this->messages = array_map(array($this, 'formatError'), $validator->getErrors()); |
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return false; |
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} |
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/** |
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* @param mixed[] $error |
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* @return string |
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*/ |
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public function formatError(array $error) |
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{ |
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// Get the error properties that should be returned to the user. |
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$properties = array_intersect_key($error, array_flip($this->errorKeys)); |
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// Format error properties as bracket-delimited key-value-pairs. |
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$message = urldecode(http_build_query($properties, null, $this->messageAttributeDelimiter)); |
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// Validation error may be returned as JSON. Replace quotes so that the message looks nice. |
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return str_replace('"', "'", $this->messagePrefix . $message . $this->messageSuffix); |
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} |
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/** |
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* @return \stdClass |
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* @throws \Zend\Validator\Exception\RuntimeException |
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*/ |
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private function getSchema() |
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{ |
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$file = $this->file; |
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if (!$file) { |
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throw new Exception\RuntimeException('Validator option `file` is required and cannot be empty.'); |
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} |
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$url = parse_url($file); |
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if (!array_key_exists('scheme', $url)) { |
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$file = 'file://' . realpath($file); |
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} |
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$refResolver = new RefResolver(new UriRetriever(), new UriResolver()); |
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try { |
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return $refResolver->resolve($file); |
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} catch (\Exception $e) { |
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throw new Exception\RuntimeException( |
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sprintf('Could not load JSON Schema: %s', $e->getMessage()), |
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$e->getCode(), |
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$e |
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); |
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} |
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} |
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/** |
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* @param mixed $value |
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* @return \stdClass |
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* @throws \Zend\Json\Exception\RuntimeException |
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*/ |
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private function decodeValue($value) |
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{ |
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if ($value instanceof \stdClass) { |
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return $value; |
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} |
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$encoded = $value; |
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if (is_array($value)) { |
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$encoded = Json::encode($value); |
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} |
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return Json::decode($encoded); |
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} |
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/** |
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* @return string[] |
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*/ |
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public function getMessages() |
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{ |
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return $this->messages; |
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} |
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/** |
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* @return string |
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*/ |
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public function getFile() |
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{ |
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return $this->file; |
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} |
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/** |
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* @param string $file |
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*/ |
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public function setFile($file) |
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{ |
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$this->file = $file; |
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} |
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/** |
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* @return string[] |
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*/ |
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public function getErrorKeys() |
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{ |
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return $this->errorKeys; |
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} |
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/** |
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* @param string[] $errorKeys |
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*/ |
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public function setErrorKeys(array $errorKeys) |
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{ |
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$this->errorKeys = $errorKeys; |
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} |
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/** |
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* @return string |
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*/ |
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public function getMessagePrefix() |
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{ |
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return $this->messagePrefix; |
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} |
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/** |
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* @param string $messagePrefix |
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*/ |
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public function setMessagePrefix($messagePrefix) |
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{ |
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$this->messagePrefix = $messagePrefix; |
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} |
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/** |
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* @return string |
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*/ |
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public function getMessageSuffix() |
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{ |
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return $this->messageSuffix; |
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} |
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/** |
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* @param string $messageSuffix |
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*/ |
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public function setMessageSuffix($messageSuffix) |
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{ |
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$this->messageSuffix = $messageSuffix; |
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} |
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/** |
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* @return string |
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*/ |
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public function getMessageAttributeDelimiter() |
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{ |
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return $this->messageAttributeDelimiter; |
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} |
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/** |
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* @param string $messageAttributeDelimiter |
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*/ |
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public function setMessageAttributeDelimiter($messageAttributeDelimiter) |
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{ |
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$this->messageAttributeDelimiter = $messageAttributeDelimiter; |
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} |
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} |
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