SchemaBuilder::buildTypeReferenceMap() - Code Metrics - Inspection of "Refactoring towards webonyx/graphql-php." - drupal-graphql/graphql - Measure and Improve Code Quality continuously with Scrutinizer

Completed
Pull Request — 8.x-3.x (#525)

by Philipp
created 2018-02-20 14:55 UTC
SchemaBuilder::buildTypeReferenceMap() B

↳ Parent: SchemaBuilder
Complexity

Conditions	5
Paths	1
Size

Total Lines	20
Code Lines	13
Duplication

Lines	13
Ratio	65 %
Importance

Changes
Metric	Value
cc	5
eloc	13
c	0
b	0
f	0
nc	1
nop	0
dl	13
loc	20
rs	8.8571
<?php

namespace Drupal\graphql\Plugin;

use Drupal\Component\Plugin\PluginManagerInterface;
use Drupal\Core\Cache\Cache;
use Drupal\Core\Cache\CacheBackendInterface;

// TODO: Clean this up.
class SchemaBuilder {

  /**
   * @var \Drupal\Core\Cache\CacheBackendInterface
   */
  protected $cacheBackend;

  /**
   * @var \Drupal\graphql\Plugin\FieldPluginManager
   */
  protected $fieldManager;

  /**
   * @var \Drupal\graphql\Plugin\MutationPluginManager
   */
  protected $mutationManager;

  /**
   * @var \Drupal\graphql\Plugin\TypePluginManager[]
   */
  protected $typeManagers;

  /**
   * @var array
   */
  protected $cache;

  /**
   * @var array
   */
  protected $fields;

  /**
   * @var array
   */
  protected $mutations;

  /**
   * @var array
   */
  protected $types;

  /**
   * SchemaBuilder constructor.
   *
   * @param \Drupal\Core\Cache\CacheBackendInterface $cacheBackend
   * @param \Drupal\graphql\Plugin\FieldPluginManager $fieldManager
   * @param \Drupal\graphql\Plugin\MutationPluginManager $mutationManager
   */
  public function __construct(
    CacheBackendInterface $cacheBackend,
    FieldPluginManager $fieldManager,
    MutationPluginManager $mutationManager
  ) {
    $this->fieldManager = $fieldManager;
    $this->mutationManager = $mutationManager;
    $this->cacheBackend = $cacheBackend;
  }

  /**
   * Registers a plugin manager.
   *
   * @param \Drupal\Component\Plugin\PluginManagerInterface $pluginManager
   *   The plugin manager to register.
   * @param $id
   *   The id of the service.
   */
  public function addTypeManager(PluginManagerInterface $pluginManager, $id) {
    $pieces = explode('.', $id);
    $type = end($pieces);

    $this->typeManagers[$type] = $pluginManager;
  }

  /**
   * @return bool
   */
  public function hasFields($parent) {
    return isset($this->getFieldAssociationMap()[$parent]);
  }

  /**
   * @return bool
   */
  public function hasMutations() {
    return !empty($this->getMutationMap());
  }

  /**
   * @return bool
   */
  public function hasType($name) {
    return isset($this->getTypeMap()[$name]);
  }

  /**
   * @return array
   */
  public function getFields($parent) {
    $associations = $this->getFieldAssociationMap();
    if (isset($associations[$parent])) {
      $map = $this->getFieldMap();
      return $this->processFields(array_map(function ($id) use ($map) {
        return $map[$id];
      }, $associations[$parent]));
    }

    return [];
  }

  /**
   * @return array
   */
  public function getMutations() {
    return $this->processMutations($this->getMutationMap());
  }

  /**
   * @return array
   */
  public function getTypes() {
    return array_map(function ($name) {
      return $this->getType($name);
    }, array_keys($this->getTypeMap()));
  }

  /**
   * @param $name
   *
   * @return mixed
   */
  public function getType($name) {
    $types = $this->getTypeMap();
    if (isset($types[$name])) {
      return $this->buildType($types[$name]);
    }

    $references = $this->getTypeReferenceMap();
    do {
      if (isset($references[$name])) {
        return $this->buildType($types[$references[$name]]);
      }
    } while (($pos = strpos($name, ':')) !== FALSE && $name = substr($name, 0, $pos));

    throw new \LogicException(sprintf('Missing type %s.', $name));
  }

  /**
   * @param $mutations
   *
   * @return array
   */
  public function processMutations($mutations) {
    return array_map([$this, 'buildMutation'], $mutations);
  }

  /**
   * @param $fields
   *
   * @return array
   */
  public function processFields($fields) {
    return array_map([$this, 'buildField'], $fields);
  }

  /**
   * @param $args
   *
   * @return array
   */
  public function processArguments($args) {
    return array_map(function ($arg) {
      return [
        'type' => $this->processType($arg['type']),
      ] + $arg;
    }, $args);
  }

  /**
   * @param $type
   *
   * @return mixed
   */
  public function processType($type) {
    list($type, $decorators) = $type;

    return array_reduce($decorators, function ($type, $decorator) {
      return $decorator($type);
    }, $this->getType($type));
  }

  /**
   * @param $type
   *
   * @return \Drupal\graphql\Plugin\GraphQL\Types\TypePluginBase
   */
  protected function buildType($type) {

    if (!isset($this->types[$type['id']])) {
      $creator = [$type['class'], 'createInstance'];
      $this->types[$type['id']] = $creator($this, $this->typeManagers[$type['type']], $type['definition'], $type['id']);
    }

    return $this->types[$type['id']];
  }

  /**
   * @param $field
   *
   * @return mixed
   */
  protected function buildField($field) {

    if (!isset($this->fields[$field['id']])) {
      $creator = [$field['class'], 'createInstance'];
      $this->fields[$field['id']] = $creator($this, $this->fieldManager, $field['definition'], $field['id']);
    }

    return $this->fields[$field['id']];
  }

  /**
   * @param $mutation
   *
   * @return mixed
   */
  protected function buildMutation($mutation) {

    if (!isset($this->mutations[$mutation['id']])) {
      $creator = [$mutation['class'], 'createInstance'];
      $this->mutations[$mutation['id']] = $creator($this, $this->mutationManager, $mutation['definition'], $mutation['id']);
    }

    return $this->mutations[$mutation['id']];
  }

  /**
   * @return array
   */
  protected function getTypeMap() {

    if (!isset($this->cache['types'])) {
      if (!isset($this->cache) && ($result = $this->cacheGet('types')) !== NULL) {
        return $result;
      }

      $this->cacheSet('types', $this->buildTypeMap());
    }

    return $this->cache['types'];
  }

  /**
   * @return array
   */
  protected function buildTypeMap() {
    // First collect all definitions by their name, overwriting those with
    // lower weights by their higher weighted counterparts. We also collect
    // the class from the plugin definition to be able to statically create
    // the type instance without loading the plugin managers at all at
    // run-time.
    $types = array_reduce(array_keys($this->typeManagers), function ($carry, $type) {
      $manager = $this->typeManagers[$type];
      $definitions = $manager->getDefinitions();

      return array_reduce(array_keys($definitions), function ($carry, $id) use ($type, $definitions) {
        $current = $definitions[$id];
        $name = $current['name'];

        if (empty($carry[$name]) || $carry[$name]['weight'] < $current['weight']) {
          $carry[$name] = [
            'type' => $type,
            'id' => $id,
            'class' => $current['class'],
            'weight' => !empty($current['weight']) ? $current['weight'] : 0,
            'reference' => !empty($current['type']) ? $current['type'] : NULL,
          ];
        }

        return $carry;
      }, $carry);
    }, []);

    // Retrieve the plugins run-time definitions. These will help us to prevent
    // plugin instantiation at run-time unless a plugin is actually called from
    // the graphql query execution. Plugins should take care of not having to
    // instantiate their plugin instances during schema composition.
    return array_map(function ($type) {
      $manager = $this->typeManagers[$type['type']];
      /** @var \Drupal\graphql\Plugin\TypePluginInterface $instance */
      $instance = $manager->getInstance(['id' => $type['id']]);

      return $type + [
        'definition' => $instance->getDefinition(),
      ] + $type;
    }, $types);
  }

  /**
   * @return array
   */
  protected function getTypeReferenceMap() {

    if (!isset($this->cache['types:references'])) {
      if (!isset($this->cache) && ($result = $this->cacheGet('types:references')) !== NULL) {
        return $result;
      }

      $this->cacheSet('types:references', $this->buildTypeReferenceMap());
    }

    return $this->cache['types:references'];
  }

  /**
   * @return array
   */
  protected function buildTypeReferenceMap() {
    $types = $this->getTypeMap();
    $references = array_reduce(array_keys($types), function ($references, $name) use ($types) {

      $current = $types[$name];
      $reference = $current['reference'];

      if (!empty($reference) && (empty($references[$reference]) || $references[$reference]['weight'] < $current['weight'])) {
        $references[$reference] = [
          'name' => $name,
          'weight' => !empty($current['weight']) ? $current['weight'] : 0,
        ];
      }

      return $references;
    }, []);

    return array_map(function ($reference) {
      return $reference['name'];
    }, $references);
  }

  /**
   * @return array
   */
  protected function getFieldAssociationMap() {

    if (!isset($this->cache['fields:associations'])) {
      if (!isset($this->cache) && ($result = $this->cacheGet('fields:associations')) !== NULL) {
        return $result;
      }

      $this->cacheSet('fields:associations', $this->buildFieldAssociationMap());
    }

    return $this->cache['fields:associations'];
  }

  /**
   * @return array
   */
  protected function buildFieldAssociationMap() {
    $definitions = $this->fieldManager->getDefinitions();

    $fields = array_reduce(array_keys($definitions), function ($carry, $id) use ($definitions) {
      $current = $definitions[$id];
      $parents = $current['parents'] ?: ['Root'];

      return array_reduce($parents, function ($carry, $parent) use ($current, $id) {
        // Allow plugins to define a different name for each parent.
        if (strpos($parent, ':') !== FALSE) {
          list($parent, $name) = explode(':', $parent);
        }

        $name = isset($name) ? $name : $current['name'];
        if (empty($carry[$parent][$name]) || $carry[$parent][$name]['weight'] < $current['weight']) {
          $carry[$parent][$name] = [
            'id' => $id,
            'weight' => !empty($current['weight']) ? $current['weight'] : 0,
          ];
        }

        return $carry;
      }, $carry);
    }, []);

    // Only return fields for types that are actually fieldable.
    $fieldable = [GRAPHQL_TYPE_PLUGIN, GRAPHQL_INTERFACE_PLUGIN];
    $fields = array_intersect_key($fields, array_filter($this->getTypeMap(), function ($type) use ($fieldable) {
      return in_array($type['type'], $fieldable);
    }) + ['Root' => NULL]);

    // We only need the plugin ids in this map.
    return array_map(function ($fields) {
      return array_map(function ($field) {
        return $field['id'];
      }, $fields);
    }, $fields);
  }

  /**
   * @return array
   */
  protected function getTypeAssociationMap() {

    if (!isset($this->cache['types:associations'])) {
      if (!isset($this->cache) && ($result = $this->cacheGet('types:associations')) !== NULL) {
        return $result;
      }

      $this->cacheSet('types:associations', $this->buildTypeAssociationMap());
    }

    return $this->cache['types:associations'];
  }

  /**
   * @return array
   */
  protected function buildTypeAssociationMap() {
    $typeMap = $this->getTypeMap();
    return array_map('array_unique',
      array_reduce(array_filter(
        array_map(function ($type) use ($typeMap) {
          // If this is an object type, just return a mapping for it's interfaces.
          if ($type['type'] === 'type') {
            return array_map(function () use ($type) {
              return [$type['definition']['name']];
            }, array_flip($type['definition']['interfaces']));
          }

          // For interfaces, find all object types that declare to implement it.
          if ($type['type'] === 'interface') {
            return [$type['definition']['name'] => array_values(array_map(function ($type) {
              return $type['definition']['name'];
            }, array_filter($this->getTypeMap(), function ($subType) use ($type) {

              return $subType['type'] === 'type' && in_array($type['definition']['name'], $subType['definition']['interfaces']);
            })))];
          }

          // Union types combine the two approaches above.
          if ($type['type'] === 'union') {
            $explicit = $type['definition']['types'];

            $implicit = array_values(array_map(function ($type) {
              return $type['definition']['name'];
            }, array_filter($typeMap, function ($subType) use ($type) {

              return $subType['type'] === 'type' && in_array($type['definition']['name'], $subType['definition']['unions']);
            })));

            return [$type['definition']['name'] => array_merge($explicit, $implicit)];
          }

          return [];
        }, $typeMap)
      ), 'array_merge_recursive', [])
    );
  }

  /**
   * Retrieve the list of derivatives associated with a composite type.
   *
   * @return string[]
   *   The list of possible sub typenames.
   */
  public function getSubTypes($definition) {
    $typeMap = $this->getTypeAssociationMap();
    return isset($typeMap[$definition['name']]) ? $typeMap[$definition['name']] : [];
  }

  /**
   * Resolve the matching type.
   */
  public function resolveType($definition, $value, $context, $info) {
    $typeMap = $this->getTypeMap();
    foreach ($this->getTypeAssociationMap() as $parent => $types) {
      if ($parent === $definition['name']) {
        foreach ($types as $type) {
          // TODO: Avoid loading the type for the check.
          // Requires `applies` to become static.
          if (array_key_exists($type, $typeMap) && $instance = $this->buildType($typeMap[$type])) {
            if ($instance->isTypeOf($value, $context, $info)) {
              return $instance;
            }
          }
        }
      }
    }
    return NULL;
  }

  /**
   * @return array
   */
  protected function getFieldMap() {

    if (!isset($this->cache['fields'])) {
      if (!isset($this->cache) && ($result = $this->cacheGet('fields')) !== NULL) {
        return $result;
      }

      $this->cacheSet('fields', $this->buildFieldMap());
    }

    return $this->cache['fields'];
  }

  /**
   * @return array
   */
  protected function buildFieldMap() {
    $association = $this->getFieldAssociationMap();
    return array_reduce($association, function ($carry, $fields) {
      return array_reduce($fields, function ($carry, $id) {
        if (!isset($carry[$id])) {
          $instance = $this->fieldManager->getInstance(['id' => $id]);
          $definition = $this->fieldManager->getDefinition($id);

          $carry[$id] = [
            'id' => $id,
            'class' => $definition['class'],
            'definition' => $instance->getDefinition(),
          ];
        }

        return $carry;
      }, $carry);
    }, []);
  }

  /**
   * @return array
   */
  protected function getMutationMap() {

    if (!isset($this->cache['mutations'])) {
      if (!isset($this->cache) && ($result = $this->cacheGet('mutations')) !== NULL) {
        return $result;
      }

      $this->cacheSet('mutations', $this->buildMutationMap());
    }

    return $this->cache['mutations'];
  }

  /**
   * @return array
   */
  protected function buildMutationMap() {
    $mutations = $this->mutationManager->getDefinitions();
    $mutations = array_reduce(array_keys($mutations), function ($carry, $id) use ($mutations) {

      $current = $mutations[$id];
      $name = $current['name'];

      if (empty($carry[$name]) || $carry[$name]['weight'] < $current['weight']) {
        $carry[$name] = [
          'id' => $id,
          'class' => $current['class'],
          'weight' => !empty($current['weight']) ? $current['weight'] : 0,
        ];
      }

      return $carry;
    }, []);

    return array_map(function ($definition) {
      $id = $definition['id'];
      $instance = $this->mutationManager->getInstance(['id' => $id]);
      return [
        'definition' => $instance->getDefinition(),
      ] + $definition;
    }, $mutations);
  }

  /**
   * @param $id
   * @param $data
   */
  protected function cacheSet($id, $data) {
    $this->cacheBackend->set("builder:$id", $data, Cache::PERMANENT);
    $this->cache[$id] = $data;
  }

  /**
   * @param $id
   *
   * @return mixed
   */
  protected function cacheGet($id) {
    $keys = [
      'builder:types' => 'types',
      'builder:types:references' => 'types:references',
      'builder:fields' => 'fields',
      'builder:fields:associations' => 'fields:associations',
      'builder:mutations' => 'mutations',
    ];

    $ids = array_keys($keys);
    $result = $this->cacheBackend->getMultiple($ids);

    $this->cache = [];
    foreach ($result as $key => $data) {
      $this->cache[$keys[$key]] = $data->data;
    }

    return isset($this->cache[$id]) ? $this->cache[$id] : NULL;
  }
}

1			<?php
2
3			namespace Drupal\graphql\Plugin;
4
5			use Drupal\Component\Plugin\PluginManagerInterface;
6			use Drupal\Core\Cache\Cache;
7			use Drupal\Core\Cache\CacheBackendInterface;
8
9			// TODO: Clean this up.
10			class SchemaBuilder {
11
12			/**
13			* @var \Drupal\Core\Cache\CacheBackendInterface
14			*/
15			protected $cacheBackend;
16
17			/**
18			* @var \Drupal\graphql\Plugin\FieldPluginManager
19			*/
20			protected $fieldManager;
21
22			/**
23			* @var \Drupal\graphql\Plugin\MutationPluginManager
24			*/
25			protected $mutationManager;
26
27			/**
28			* @var \Drupal\graphql\Plugin\TypePluginManager[]
29			*/
30			protected $typeManagers;
31
32			/**
33			* @var array
34			*/
35			protected $cache;
36
37			/**
38			* @var array
39			*/
40			protected $fields;
drupal-graphql / graphql

Pull Request — 8.x-3.x (#525)

SchemaBuilder::buildTypeReferenceMap() B

Complexity

Size

Duplication

Importance

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