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<?php |
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declare(strict_types=1); |
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namespace GraphQL\Doctrine; |
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use ArrayAccess; |
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use Closure; |
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use GraphQL\Doctrine\Definition\EntityID; |
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use GraphQL\Type\Definition\ResolveInfo; |
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use ReflectionClass; |
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use ReflectionMethod; |
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/** |
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* A field resolver that will allow access to public properties and getter. |
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* Arguments, if any, will be forwarded as is to the method. |
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*/ |
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class DefaultFieldResolver |
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{ |
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public function __invoke($source, $args, $context, ResolveInfo $info) |
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{ |
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$fieldName = $info->fieldName; |
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$property = null; |
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if (is_object($source)) { |
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$property = $this->resolveObject($source, $args, $fieldName); |
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} elseif (is_array($source) || $source instanceof ArrayAccess) { |
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$property = $this->resolveArray($source, $fieldName); |
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} |
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return $property instanceof Closure ? $property($source, $args, $context) : $property; |
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} |
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/** |
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* Resolve for an object |
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* |
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* @param mixed $source |
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* @param mixed $args |
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* @param string $fieldName |
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* |
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* @return mixed |
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*/ |
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private function resolveObject($source, ?array $args, string $fieldName) |
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{ |
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$getter = $this->getGetter($source, $fieldName); |
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if ($getter) { |
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$args = $this->orderArguments($getter, $args); |
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return $getter->invoke($source, ...$args); |
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} |
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if (isset($source->{$fieldName})) { |
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return $source->{$fieldName}; |
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} |
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return null; |
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} |
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/** |
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* Resolve for an array |
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* |
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* @param mixed $source |
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* @param string $fieldName |
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* |
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* @return mixed |
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*/ |
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private function resolveArray($source, string $fieldName) |
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{ |
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return $source[$fieldName] ?? null; |
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} |
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/** |
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* Return the getter/isser method if any valid one exists |
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* |
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* @param mixed $source |
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* @param string $name |
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* |
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* @return null|ReflectionMethod |
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*/ |
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private function getGetter($source, string $name): ?ReflectionMethod |
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{ |
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if (!preg_match('~^(is|has)[A-Z]~', $name)) { |
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$name = 'get' . ucfirst($name); |
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} |
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$class = new ReflectionClass($source); |
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if ($class->hasMethod($name)) { |
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$method = $class->getMethod($name); |
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if ($method->getModifiers() & ReflectionMethod::IS_PUBLIC) { |
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return $method; |
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} |
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} |
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return null; |
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} |
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/** |
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* Re-order associative args to ordered args |
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* |
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* @param ReflectionMethod $method |
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* @param array $args |
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* |
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* @return array |
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*/ |
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private function orderArguments(ReflectionMethod $method, ?array $args): array |
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{ |
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$result = []; |
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if (!$args) { |
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return $result; |
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} |
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foreach ($method->getParameters() as $param) { |
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if (array_key_exists($param->getName(), $args)) { |
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$arg = $args[$param->getName()]; |
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// Fetch entity from DB |
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if ($arg instanceof EntityID) { |
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$arg = $arg->getEntity(); |
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} |
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$result[] = $arg; |
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} |
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} |
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return $result; |
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} |
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} |
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Ecodev /
graphql-doctrine
