Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\field\Entity;
Chris@0: 
Chris@0: use Drupal\Core\Entity\EntityStorageInterface;
Chris@0: use Drupal\Core\Entity\FieldableEntityStorageInterface;
Chris@0: use Drupal\Core\Field\FieldConfigBase;
Chris@0: use Drupal\Core\Field\FieldException;
Chris@0: use Drupal\field\FieldStorageConfigInterface;
Chris@0: use Drupal\field\FieldConfigInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Defines the Field entity.
Chris@0:  *
Chris@0:  * @ConfigEntityType(
Chris@0:  *   id = "field_config",
Chris@0:  *   label = @Translation("Field"),
Chris@0:  *   handlers = {
Chris@0:  *     "access" = "Drupal\field\FieldConfigAccessControlHandler",
Chris@0:  *     "storage" = "Drupal\field\FieldConfigStorage"
Chris@0:  *   },
Chris@0:  *   config_prefix = "field",
Chris@0:  *   entity_keys = {
Chris@0:  *     "id" = "id",
Chris@0:  *     "label" = "label"
Chris@0:  *   },
Chris@0:  *   config_export = {
Chris@0:  *     "id",
Chris@0:  *     "field_name",
Chris@0:  *     "entity_type",
Chris@0:  *     "bundle",
Chris@0:  *     "label",
Chris@0:  *     "description",
Chris@0:  *     "required",
Chris@0:  *     "translatable",
Chris@0:  *     "default_value",
Chris@0:  *     "default_value_callback",
Chris@0:  *     "settings",
Chris@0:  *     "field_type",
Chris@0:  *   }
Chris@0:  * )
Chris@0:  */
Chris@0: class FieldConfig extends FieldConfigBase implements FieldConfigInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * Flag indicating whether the field is deleted.
Chris@0:    *
Chris@0:    * The delete() method marks the field as "deleted" and removes the
Chris@0:    * corresponding entry from the config storage, but keeps its definition in
Chris@0:    * the state storage while field data is purged by a separate
Chris@0:    * garbage-collection process.
Chris@0:    *
Chris@0:    * Deleted fields stay out of the regular entity lifecycle (notably, their
Chris@0:    * values are not populated in loaded entities, and are not saved back).
Chris@0:    *
Chris@0:    * @var bool
Chris@0:    */
Chris@0:   protected $deleted = FALSE;
Chris@0: 
Chris@0:   /**
Chris@0:    * The associated FieldStorageConfig entity.
Chris@0:    *
Chris@0:    * @var \Drupal\field\Entity\FieldStorageConfig
Chris@0:    */
Chris@0:   protected $fieldStorage;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a FieldConfig object.
Chris@0:    *
Chris@0:    * In most cases, Field entities are created via
Chris@0:    * FieldConfig::create($values), where $values is the same
Chris@0:    * parameter as in this constructor.
Chris@0:    *
Chris@0:    * @param array $values
Chris@0:    *   An array of field properties, keyed by property name. The
Chris@0:    *   storage associated with the field can be specified either with:
Chris@0:    *   - field_storage: the FieldStorageConfigInterface object,
Chris@0:    *   or by referring to an existing field storage in the current configuration
Chris@0:    *   with:
Chris@0:    *   - field_name: The field name.
Chris@0:    *   - entity_type: The entity type.
Chris@0:    *   Additionally, a 'bundle' property is required to indicate the entity
Chris@0:    *   bundle to which the field is attached to. Other array elements will be
Chris@0:    *   used to set the corresponding properties on the class; see the class
Chris@0:    *   property documentation for details.
Chris@0:    *
Chris@0:    * @see entity_create()
Chris@0:    */
Chris@0:   public function __construct(array $values, $entity_type = 'field_config') {
Chris@0:     // Allow either an injected FieldStorageConfig object, or a field_name and
Chris@0:     // entity_type.
Chris@0:     if (isset($values['field_storage'])) {
Chris@0:       if (!$values['field_storage'] instanceof FieldStorageConfigInterface) {
Chris@0:         throw new FieldException('Attempt to create a configurable field for a non-configurable field storage.');
Chris@0:       }
Chris@0:       $field_storage = $values['field_storage'];
Chris@0:       $values['field_name'] = $field_storage->getName();
Chris@0:       $values['entity_type'] = $field_storage->getTargetEntityTypeId();
Chris@0:       // The internal property is fieldStorage, not field_storage.
Chris@0:       unset($values['field_storage']);
Chris@0:       $values['fieldStorage'] = $field_storage;
Chris@0:     }
Chris@0:     else {
Chris@0:       if (empty($values['field_name'])) {
Chris@0:         throw new FieldException('Attempt to create a field without a field_name.');
Chris@0:       }
Chris@0:       if (empty($values['entity_type'])) {
Chris@0:         throw new FieldException("Attempt to create a field '{$values['field_name']}' without an entity_type.");
Chris@0:       }
Chris@0:     }
Chris@0:     // 'bundle' is required in either case.
Chris@0:     if (empty($values['bundle'])) {
Chris@0:       throw new FieldException("Attempt to create a field '{$values['field_name']}' without a bundle.");
Chris@0:     }
Chris@0: 
Chris@0:     parent::__construct($values, $entity_type);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function postCreate(EntityStorageInterface $storage) {
Chris@0:     parent::postCreate($storage);
Chris@0: 
Chris@0:     // Validate that we have a valid storage for this field. This throws an
Chris@0:     // exception if the storage is invalid.
Chris@0:     $this->getFieldStorageDefinition();
Chris@0: 
Chris@0:     // 'Label' defaults to the field name (mostly useful for fields created in
Chris@0:     // tests).
Chris@0:     if (empty($this->label)) {
Chris@0:       $this->label = $this->getName();
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Overrides \Drupal\Core\Entity\Entity::preSave().
Chris@0:    *
Chris@0:    * @throws \Drupal\Core\Field\FieldException
Chris@0:    *   If the field definition is invalid.
Chris@0:    * @throws \Drupal\Core\Entity\EntityStorageException
Chris@0:    *   In case of failures at the configuration storage level.
Chris@0:    */
Chris@0:   public function preSave(EntityStorageInterface $storage) {
Chris@0:     $entity_manager = \Drupal::entityManager();
Chris@0:     $field_type_manager = \Drupal::service('plugin.manager.field.field_type');
Chris@0: 
Chris@0:     $storage_definition = $this->getFieldStorageDefinition();
Chris@0: 
Chris@0:     // Filter out unknown settings and make sure all settings are present, so
Chris@0:     // that a complete field definition is passed to the various hooks and
Chris@0:     // written to config.
Chris@0:     $default_settings = $field_type_manager->getDefaultFieldSettings($storage_definition->getType());
Chris@0:     $this->settings = array_intersect_key($this->settings, $default_settings) + $default_settings;
Chris@0: 
Chris@0:     if ($this->isNew()) {
Chris@0:       // Notify the entity storage.
Chris@0:       $entity_manager->onFieldDefinitionCreate($this);
Chris@0:     }
Chris@0:     else {
Chris@0:       // Some updates are always disallowed.
Chris@0:       if ($this->entity_type != $this->original->entity_type) {
Chris@0:         throw new FieldException("Cannot change an existing field's entity_type.");
Chris@0:       }
Chris@0:       if ($this->bundle != $this->original->bundle) {
Chris@0:         throw new FieldException("Cannot change an existing field's bundle.");
Chris@0:       }
Chris@0:       if ($storage_definition->uuid() != $this->original->getFieldStorageDefinition()->uuid()) {
Chris@0:         throw new FieldException("Cannot change an existing field's storage.");
Chris@0:       }
Chris@0:       // Notify the entity storage.
Chris@0:       $entity_manager->onFieldDefinitionUpdate($this, $this->original);
Chris@0:     }
Chris@0: 
Chris@0:     parent::preSave($storage);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function calculateDependencies() {
Chris@0:     parent::calculateDependencies();
Chris@0:     // Mark the field_storage_config as a dependency.
Chris@0:     $this->addDependency('config', $this->getFieldStorageDefinition()->getConfigDependencyName());
Chris@0:     return $this;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public static function preDelete(EntityStorageInterface $storage, array $fields) {
Chris@0:     $state = \Drupal::state();
Chris@0:     $entity_type_manager = \Drupal::entityTypeManager();
Chris@0: 
Chris@0:     parent::preDelete($storage, $fields);
Chris@0:     // Keep the field definitions in the state storage so we can use them
Chris@0:     // later during field_purge_batch().
Chris@0:     $deleted_fields = $state->get('field.field.deleted') ?: [];
Chris@0: 
Chris@0:     /** @var \Drupal\field\FieldConfigInterface $field */
Chris@0:     foreach ($fields as $field) {
Chris@0:       // Only mark a field for purging if there is data. Otherwise, just remove
Chris@0:       // it.
Chris@0:       $target_entity_storage = $entity_type_manager->getStorage($field->getTargetEntityTypeId());
Chris@0:       if (!$field->deleted && $target_entity_storage instanceof FieldableEntityStorageInterface && $target_entity_storage->countFieldData($field->getFieldStorageDefinition(), TRUE)) {
Chris@0:         $config = $field->toArray();
Chris@0:         $config['deleted'] = TRUE;
Chris@0:         $config['field_storage_uuid'] = $field->getFieldStorageDefinition()->uuid();
Chris@0:         $deleted_fields[$field->uuid()] = $config;
Chris@0:       }
Chris@0:     }
Chris@0:     $state->set('field.field.deleted', $deleted_fields);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public static function postDelete(EntityStorageInterface $storage, array $fields) {
Chris@0:     // Clear the cache upfront, to refresh the results of getBundles().
Chris@0:     \Drupal::entityManager()->clearCachedFieldDefinitions();
Chris@0: 
Chris@0:     // Notify the entity storage.
Chris@0:     foreach ($fields as $field) {
Chris@0:       if (!$field->deleted) {
Chris@0:         \Drupal::entityManager()->onFieldDefinitionDelete($field);
Chris@0:       }
Chris@0:     }
Chris@0: 
Chris@0:     // If this is part of a configuration synchronization then the following
Chris@0:     // configuration updates are not necessary.
Chris@0:     $entity = reset($fields);
Chris@0:     if ($entity->isSyncing()) {
Chris@0:       return;
Chris@0:     }
Chris@0: 
Chris@0:     // Delete the associated field storages if they are not used anymore and are
Chris@0:     // not persistent.
Chris@0:     $storages_to_delete = [];
Chris@0:     foreach ($fields as $field) {
Chris@0:       $storage_definition = $field->getFieldStorageDefinition();
Chris@0:       if (!$field->deleted && !$field->isUninstalling() && $storage_definition->isDeletable()) {
Chris@0:         // Key by field UUID to avoid deleting the same storage twice.
Chris@0:         $storages_to_delete[$storage_definition->uuid()] = $storage_definition;
Chris@0:       }
Chris@0:     }
Chris@0:     if ($storages_to_delete) {
Chris@0:       \Drupal::entityManager()->getStorage('field_storage_config')->delete($storages_to_delete);
Chris@0:     }
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   protected function linkTemplates() {
Chris@0:     $link_templates = parent::linkTemplates();
Chris@0:     if (\Drupal::moduleHandler()->moduleExists('field_ui')) {
Chris@0:       $link_templates["{$this->entity_type}-field-edit-form"] = 'entity.field_config.' . $this->entity_type . '_field_edit_form';
Chris@0:       $link_templates["{$this->entity_type}-storage-edit-form"] = 'entity.field_config.' . $this->entity_type . '_storage_edit_form';
Chris@0:       $link_templates["{$this->entity_type}-field-delete-form"] = 'entity.field_config.' . $this->entity_type . '_field_delete_form';
Chris@0: 
Chris@0:       if (isset($link_templates['config-translation-overview'])) {
Chris@0:         $link_templates["config-translation-overview.{$this->entity_type}"] = "entity.field_config.config_translation_overview.{$this->entity_type}";
Chris@0:       }
Chris@0:     }
Chris@0:     return $link_templates;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   protected function urlRouteParameters($rel) {
Chris@0:     $parameters = parent::urlRouteParameters($rel);
Chris@0:     $entity_type = \Drupal::entityManager()->getDefinition($this->entity_type);
Chris@0:     $bundle_parameter_key = $entity_type->getBundleEntityType() ?: 'bundle';
Chris@0:     $parameters[$bundle_parameter_key] = $this->bundle;
Chris@0:     return $parameters;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function isDeleted() {
Chris@0:     return $this->deleted;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getFieldStorageDefinition() {
Chris@0:     if (!$this->fieldStorage) {
Chris@0:       $fields = $this->entityManager()->getFieldStorageDefinitions($this->entity_type);
Chris@0:       if (!isset($fields[$this->field_name])) {
Chris@0:         throw new FieldException("Attempt to create a field {$this->field_name} that does not exist on entity type {$this->entity_type}.");
Chris@0:       }
Chris@0:       if (!$fields[$this->field_name] instanceof FieldStorageConfigInterface) {
Chris@0:         throw new FieldException("Attempt to create a configurable field of non-configurable field storage {$this->field_name}.");
Chris@0:       }
Chris@0:       $this->fieldStorage = $fields[$this->field_name];
Chris@0:     }
Chris@0: 
Chris@0:     return $this->fieldStorage;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function isDisplayConfigurable($context) {
Chris@0:     return TRUE;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getDisplayOptions($display_context) {
Chris@0:     // Hide configurable fields by default.
Chris@0:     return ['region' => 'hidden'];
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function isReadOnly() {
Chris@0:     return FALSE;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function isComputed() {
Chris@0:     return FALSE;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * Loads a field config entity based on the entity type and field name.
Chris@0:    *
Chris@0:    * @param string $entity_type_id
Chris@0:    *   ID of the entity type.
Chris@0:    * @param string $bundle
Chris@0:    *   Bundle name.
Chris@0:    * @param string $field_name
Chris@0:    *   Name of the field.
Chris@0:    *
Chris@0:    * @return static
Chris@0:    *   The field config entity if one exists for the provided field
Chris@0:    *   name, otherwise NULL.
Chris@0:    */
Chris@0:   public static function loadByName($entity_type_id, $bundle, $field_name) {
Chris@0:     return \Drupal::entityManager()->getStorage('field_config')->load($entity_type_id . '.' . $bundle . '.' . $field_name);
Chris@0:   }
Chris@0: 
Chris@0: }