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<?php |
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namespace Drupal\graphql\Routing; |
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use Drupal\Core\Routing\Enhancer\RouteEnhancerInterface; |
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use Drupal\graphql\QueryProvider\QueryProviderInterface; |
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use Symfony\Component\HttpFoundation\Request; |
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use Symfony\Component\Routing\Route; |
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class QueryRouteEnhancer implements RouteEnhancerInterface { |
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const SINGLE = 'single'; |
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const BATCH = 'batch'; |
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/** |
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* The query provider service. |
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* |
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* @var \Drupal\graphql\QueryProvider\QueryProviderInterface |
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*/ |
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protected $queryProvider; |
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/** |
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* QueryRouteEnhancer constructor. |
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* |
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* @param \Drupal\graphql\QueryProvider\QueryProviderInterface $queryProvider |
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* The query provider service. |
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*/ |
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public function __construct(QueryProviderInterface $queryProvider) { |
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$this->queryProvider = $queryProvider; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function applies(Route $route) { |
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return $route->hasDefault('_graphql'); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function enhance(array $defaults, Request $request) { |
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if (!empty($defaults['_controller'])) { |
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return $defaults; |
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} |
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$params = $this->extractParams($request); |
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if ($enhanced = $this->enhanceSingle($defaults, $params, $request)) { |
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return $enhanced; |
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} |
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if ($enhanced = $this->enhanceBatch($defaults, $params, $request)) { |
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return $enhanced; |
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} |
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// By default we assume a 'single' request. This is going to fail in the |
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// graphql processor due to a missing query string but at least provides |
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// the right format for the client to act upon. |
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return $defaults + [ |
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'_controller' => $defaults['_graphql']['single'], |
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]; |
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} |
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/** |
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* Attempts to enhance the request as a batch query. |
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* |
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* @param array $defaults |
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* The controller defaults. |
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* @param array $params |
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* The query parameters. |
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* @param \Symfony\Component\HttpFoundation\Request $request |
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* The request object. |
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* |
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* @return array|bool |
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* The enhanced controller defaults. |
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*/ |
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protected function enhanceBatch(array $defaults, array $params, Request $request) { |
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// PHP 5.5.x does not yet support the ARRAY_FILTER_USE_KEYS constant. |
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$keys = array_filter(array_keys($params), function($index) { |
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return is_numeric($index); |
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}); |
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$queries = array_intersect_key($params, array_flip($keys)); |
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if (!isset($queries[0])) { |
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return FALSE; |
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} |
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if (array_keys($queries) !== range(0, count($queries) - 1)) { |
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// If this is not a continuously numeric array, don't do anything. |
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return FALSE; |
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} |
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return $defaults + [ |
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'_controller' => $defaults['_graphql']['multiple'], |
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'queries' => $queries, |
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'type' => static::BATCH, |
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]; |
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} |
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/** |
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* Attempts to enhance the request as a single query. |
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* |
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* @param array $defaults |
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* The controller defaults. |
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* @param array $params |
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* The query parameters. |
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* @param \Symfony\Component\HttpFoundation\Request $request |
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* The request object. |
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* |
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* @return array|boolean |
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* The enhanced controller defaults. |
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*/ |
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protected function enhanceSingle(array $defaults, array $params, Request $request) { |
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$values = $params + [ |
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'query' => empty($params['query']) ? $this->queryProvider->getQuery($params) : $params['query'], |
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'variables' => [], |
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]; |
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if (empty($values['query'])) { |
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return FALSE; |
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} |
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return $defaults + [ |
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'_controller' => $defaults['_graphql']['single'], |
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'query' => $values['query'] ?: '', |
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'variables' => $values['variables'] ?: [], |
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'persisted' => empty($params['query']), |
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'type' => static::SINGLE, |
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]; |
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} |
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/** |
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* Extract an associative array of query parameters from the request. |
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* |
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* If the given request does not have any POST body content it uses the GET |
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* query parameters instead. |
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* |
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* @param \Symfony\Component\HttpFoundation\Request $request |
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* The request object. |
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* |
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* @return array |
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* An associative array of query parameters. |
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*/ |
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protected function extractParams(Request $request) { |
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$values = ($content = $request->getContent()) ? json_decode($content, TRUE) : $request->query->all(); |
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return array_map(function($value) { |
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if (!is_string($value)) { |
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return $value; |
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} |
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$decoded = json_decode($value, TRUE); |
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return ($decoded != $value) && $decoded ? $decoded : $value; |
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}, $values ?: []); |
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} |
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} |
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drupal-graphql /
graphql
