Drupal\graphql\GraphQL\Execution\QueryVisitor\MaxComplexityQueryVisitor

Complexity

Total Complexity

8

Size/Duplication

Total Lines	57
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	2

Importance

Changes

0

5 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	3	1
A	visit()	0	11	2
A	reduce()	0	3	2
A	initial()	0	3	1
A	finish()	0	5	2

<?php

namespace Drupal\graphql\GraphQL\Execution\QueryVisitor;

use Youshido\GraphQL\Exception\ResolveException;
use Youshido\GraphQL\Field\FieldInterface;

class MaxComplexityQueryVisitor implements QueryVisitorInterface {

  /**
   * The allowed maximum complexity;
   *
   * @var int
   */
  protected $maxComplexity;

  /**
   * MaxComplexityQueryVisitor constructor.
   *
   * @param int $maxComplexity
   *   The allowed maximum complexity.
   */
  public function __construct($maxComplexity) {
    $this->maxComplexity = $maxComplexity;
  }

  /**
   * {@inheritdoc}
   */
  public function visit(array $args, FieldInterface $field, $child) {
    /** @var \Youshido\GraphQL\Config\Field\FieldConfig $config */
    $config = $field->getConfig();
    $cost = $config->get('cost', NULL);

    if (is_callable($cost)) {
      $cost = $cost($args, $field, $child);
    }

    return $cost;
  }

  /**
   * {@inheritdoc}
   */
  public function reduce($carry, $current) {
    return !empty($current) ? $carry + $current : $carry;
  }

  /**
   * {@inheritdoc}
   */
  public function initial() {
    return 0;
  }

  /**
   * {@inheritdoc}
   */
  public function finish($result) {
    if ($result > $this->maxComplexity) {
      throw new ResolveException('The query exceeds the allowed maximum complexity.');
    }
  }
}