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<?php |
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/* |
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* This file is part of the KleijnWeb\SwaggerBundle package. |
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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 KleijnWeb\SwaggerBundle\Document; |
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use KleijnWeb\SwaggerBundle\Document\Exception\ResourceNotReadableException; |
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use KleijnWeb\SwaggerBundle\Document\Exception\InvalidReferenceException; |
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/** |
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* @author John Kleijn <[email protected]> |
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*/ |
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class RefResolver |
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{ |
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/** |
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* @var object |
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*/ |
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private $definition; |
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/** |
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* @var string |
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*/ |
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private $uri; |
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/** |
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* @var string |
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*/ |
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private $directory; |
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/** |
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* @var YamlParser |
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*/ |
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private $yamlParser; |
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/** |
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* @param object $definition |
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* @param string $uri |
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* @param YamlParser $yamlParser |
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*/ |
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public function __construct($definition, $uri, YamlParser $yamlParser = null) |
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{ |
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$this->definition = $definition; |
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$uriSegs = $this->parseUri($uri); |
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if (!$uriSegs['proto']) { |
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$uri = realpath($uri); |
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} |
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$this->uri = $uri; |
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$this->directory = dirname($this->uri); |
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$this->yamlParser = $yamlParser ?: new YamlParser(); |
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} |
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/** |
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* @return object |
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*/ |
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public function getDefinition() |
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{ |
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return $this->definition; |
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} |
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/** |
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* Resolve all references |
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* |
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* @return object |
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*/ |
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public function resolve() |
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{ |
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$this->resolveRecursively($this->definition); |
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return $this->definition; |
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} |
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/** |
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* Revert to original state |
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* |
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* @return object |
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*/ |
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public function unresolve() |
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{ |
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$this->unresolveRecursively($this->definition); |
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return $this->definition; |
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} |
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/** |
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* @param object|array $current |
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* @param object $document |
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* @param string $uri |
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* |
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* @throws InvalidReferenceException |
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* @throws ResourceNotReadableException |
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*/ |
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private function resolveRecursively(&$current, $document = null, $uri = null) |
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{ |
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$document = $document ?: $this->definition; |
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$uri = $uri ?: $this->uri; |
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if (is_array($current)) { |
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foreach ($current as &$value) { |
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if ($value !== null && !is_scalar($value)) { |
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$this->resolveRecursively($value, $document, $uri); |
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} |
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} |
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} elseif (is_object($current)) { |
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if (property_exists($current, '$ref')) { |
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$uri = $current->{'$ref'}; |
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if ('#' === $uri[0]) { |
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$current = $this->lookup($uri, $document); |
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} else { |
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$uriSegs = $this->parseUri($uri); |
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$normalizedUri = $this->normalizeUri($uriSegs); |
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$externalDocument = $this->loadExternal($normalizedUri); |
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$current = $this->lookup($uriSegs['segment'], $externalDocument, $normalizedUri); |
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$this->resolveRecursively($current, $externalDocument, $normalizedUri); |
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} |
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if (is_object($current)) { |
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$current->id = $uri; |
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$current->{'x-ref-id'} = $uri; |
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} |
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return; |
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} |
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foreach ($current as $propertyName => &$propertyValue) { |
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$this->resolveRecursively($propertyValue, $document, $uri); |
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} |
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} |
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} |
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/** |
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* @param object|array $current |
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* @param object|array $parent |
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* |
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* @return void |
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*/ |
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private function unresolveRecursively(&$current, &$parent = null) |
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{ |
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foreach ($current as $key => &$value) { |
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if ($value !== null && !is_scalar($value)) { |
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$this->unresolveRecursively($value, $current); |
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} |
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if ($key === 'x-ref-id') { |
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$parent = (object)['$ref' => $value]; |
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} |
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} |
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} |
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/** |
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* @param string $path |
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* @param object $document |
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* @param string $uri |
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* |
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* @return mixed |
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* @throws InvalidReferenceException |
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*/ |
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private function lookup($path, $document, $uri = null) |
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{ |
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$target = $this->lookupRecursively( |
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explode('/', trim($path, '/#')), |
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$document |
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); |
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if (!$target) { |
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throw new InvalidReferenceException( |
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"Target '$path' does not exist'" . ($uri ? " at '$uri''" : '') |
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); |
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} |
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return $target; |
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} |
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/** |
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* @param array $segments |
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* @param object $context |
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* |
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* @return mixed |
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*/ |
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private function lookupRecursively(array $segments, $context) |
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{ |
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$segment = str_replace(['~0', '~1'], ['~', '/'], array_shift($segments)); |
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if (property_exists($context, $segment)) { |
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if (!count($segments)) { |
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return $context->$segment; |
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} |
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return $this->lookupRecursively($segments, $context->$segment); |
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} |
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return null; |
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} |
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/** |
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* @param string $uri |
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* |
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* @return object |
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* @throws ResourceNotReadableException |
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*/ |
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private function loadExternal($uri) |
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{ |
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$exception = new ResourceNotReadableException("Failed reading '$uri'"); |
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set_error_handler(function () use ($exception) { |
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throw $exception; |
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}); |
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$response = file_get_contents($uri); |
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restore_error_handler(); |
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if (false === $response) { |
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throw $exception; |
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} |
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if (preg_match('/\b(yml|yaml)\b/', $uri)) { |
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return $this->yamlParser->parse($response); |
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} |
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return json_decode($response); |
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} |
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/** |
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* @param array $uriSegs |
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* |
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* @return string |
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*/ |
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private function normalizeUri(array $uriSegs) |
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{ |
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return |
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$uriSegs['proto'] . $uriSegs['host'] |
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. rtrim($uriSegs['root'], '/') . '/' |
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. (!$uriSegs['root'] ? ltrim("$this->directory/", '/') : '') |
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. $uriSegs['path']; |
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} |
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/** |
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* @param string $uri |
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* |
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* @return array |
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*/ |
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private function parseUri($uri) |
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{ |
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$defaults = [ |
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'root' => '', |
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'proto' => '', |
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'host' => '', |
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'path' => '', |
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'segment' => '' |
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]; |
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$pattern = '@' |
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. '(?P<proto>[a-z]+\://)?' |
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. '(?P<host>[0-9a-z\.\@\:]+\.[a-z]+)?' |
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. '(?P<root>/)?' |
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. '(?P<path>[^#]*)' |
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. '(?P<segment>#.*)?' |
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. '@'; |
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preg_match($pattern, $uri, $matches); |
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return array_merge($defaults, array_intersect_key($matches, $defaults)); |
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} |
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} |
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kleijnweb /
swagger-bundle
