ConfigurableEntityReferenceItem.php 7.77 KB
Newer Older
1 2 3 4
<?php

/**
 * @file
5
 * Contains \Drupal\entity_reference\ConfigurableEntityReferenceItem.
6 7
 */

8
namespace Drupal\entity_reference;
9

10
use Drupal\Component\Utility\String;
11 12
use Drupal\Core\Field\FieldDefinitionInterface;
use Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem;
13 14
use Drupal\Core\Session\AccountInterface;
use Drupal\Core\TypedData\AllowedValuesInterface;
15
use Drupal\Core\TypedData\DataDefinition;
16
use Drupal\Core\Validation\Plugin\Validation\Constraint\AllowedValuesConstraint;
17 18

/**
19
 * Alternative plugin implementation of the 'entity_reference' field type.
20
 *
21 22
 * Replaces the Core 'entity_reference' entity field type implementation, this
 * supports configurable fields, auto-creation of referenced entities and more.
23
 *
24 25 26
 * Required settings (below the definition's 'settings' key) are:
 *  - target_type: The entity type to reference.
 *
27
 * @see entity_reference_field_info_alter().
28
 */
29
class ConfigurableEntityReferenceItem extends EntityReferenceItem implements AllowedValuesInterface {
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

  /**
   * {@inheritdoc}
   */
  public function getPossibleValues(AccountInterface $account = NULL) {
    return $this->getSettableValues($account);
  }

  /**
   * {@inheritdoc}
   */
  public function getPossibleOptions(AccountInterface $account = NULL) {
    return $this->getSettableOptions($account);
  }

  /**
   * {@inheritdoc}
   */
  public function getSettableValues(AccountInterface $account = NULL) {
49
    // Flatten options first, because "settable options" may contain group
50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75
    // arrays.
    $flatten_options = \Drupal::formBuilder()->flattenOptions($this->getSettableOptions($account));
    return array_keys($flatten_options);
  }

  /**
   * {@inheritdoc}
   */
  public function getSettableOptions(AccountInterface $account = NULL) {
    $field_definition = $this->getFieldDefinition();
    if (!$options = \Drupal::service('plugin.manager.entity_reference.selection')->getSelectionHandler($field_definition, $this->getEntity())->getReferenceableEntities()) {
      return array();
    }

    // Rebuild the array by changing the bundle key into the bundle label.
    $target_type = $field_definition->getSetting('target_type');
    $bundles = \Drupal::entityManager()->getBundleInfo($target_type);

    $return = array();
    foreach ($options as $bundle => $entity_ids) {
      $bundle_label = String::checkPlain($bundles[$bundle]['label']);
      $return[$bundle_label] = $entity_ids;
    }

    return count($return) == 1 ? reset($return) : $return;
  }
76

77 78 79
  /**
   * {@inheritdoc}
   */
80 81
  public static function propertyDefinitions(FieldDefinitionInterface $field_definition) {
    $settings = $field_definition->getSettings();
82 83
    $target_type = $settings['target_type'];

84 85 86 87 88 89 90 91 92 93
    // Call the parent to define the target_id and entity properties.
    $properties = parent::propertyDefinitions($field_definition);

    // Only add the revision ID property if the target entity type supports
    // revisions.
    $target_type_info = \Drupal::entityManager()->getDefinition($target_type);
    if ($target_type_info->hasKey('revision') && $target_type_info->getRevisionTable()) {
      $properties['revision_id'] = DataDefinition::create('integer')
        ->setLabel(t('Revision ID'))
        ->setConstraints(array('Range' => array('min' => 0)));
94 95
    }

96
    return $properties;
97 98
  }

99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115
  /**
   * {@inheritdoc}
   */
  public function getConstraints() {
    $constraints = parent::getConstraints();

    // Remove the 'AllowedValuesConstraint' validation constraint because entity
    // reference fields already use the 'ValidReference' constraint.
    foreach ($constraints as $key => $constraint) {
      if ($constraint instanceof AllowedValuesConstraint) {
        unset($constraints[$key]);
      }
    }

    return $constraints;
  }

116 117 118
  /**
   * {@inheritdoc}
   */
119 120 121 122
  public static function schema(FieldDefinitionInterface $field_definition) {
    $schema = parent::schema($field_definition);

    $target_type = $field_definition->getSetting('target_type');
123 124
    $target_type_info = \Drupal::entityManager()->getDefinition($target_type);

125
    if ($target_type_info->isSubclassOf('\Drupal\Core\Entity\ContentEntityInterface')) {
126 127 128 129 130
      $schema['columns']['revision_id'] = array(
        'description' => 'The revision ID of the target entity.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => FALSE,
131 132 133
      );
    }

134 135 136 137 138 139 140 141 142 143
    return $schema;
  }

  /**
   * {@inheritdoc}
   */
  public function settingsForm(array $form, array &$form_state, $has_data) {
    $element['target_type'] = array(
      '#type' => 'select',
      '#title' => t('Type of item to reference'),
144
      '#options' => \Drupal::entityManager()->getEntityTypeLabels(),
145
      '#default_value' => $this->getSetting('target_type'),
146 147 148 149 150 151 152 153 154 155 156 157
      '#required' => TRUE,
      '#disabled' => $has_data,
      '#size' => 1,
    );

    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public function instanceSettingsForm(array $form, array &$form_state) {
158
    $instance = $form_state['instance'];
159 160

    // Get all selection plugins for this entity type.
161
    $selection_plugins = \Drupal::service('plugin.manager.entity_reference.selection')->getSelectionGroups($this->getSetting('target_type'));
162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187
    $handler_groups = array_keys($selection_plugins);

    $handlers = \Drupal::service('plugin.manager.entity_reference.selection')->getDefinitions();
    $handlers_options = array();
    foreach ($handlers as $plugin_id => $plugin) {
      // We only display base plugins (e.g. 'default', 'views', ...) and not
      // entity type specific plugins (e.g. 'default_node', 'default_user',
      // ...).
      if (in_array($plugin_id, $handler_groups)) {
        $handlers_options[$plugin_id] = check_plain($plugin['label']);
      }
    }

    $form = array(
      '#type' => 'container',
      '#attached' => array(
        'css' => array(drupal_get_path('module', 'entity_reference') . '/css/entity_reference.admin.css'),
      ),
      '#process' => array(
        '_entity_reference_field_instance_settings_ajax_process',
      ),
      '#element_validate' => array(array(get_class($this), 'instanceSettingsFormValidate')),
    );
    $form['handler'] = array(
      '#type' => 'details',
      '#title' => t('Reference type'),
188
      '#open' => TRUE,
189 190 191 192 193 194 195 196
      '#tree' => TRUE,
      '#process' => array('_entity_reference_form_process_merge_parent'),
    );

    $form['handler']['handler'] = array(
      '#type' => 'select',
      '#title' => t('Reference method'),
      '#options' => $handlers_options,
197
      '#default_value' => $instance->getSetting('handler'),
198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216
      '#required' => TRUE,
      '#ajax' => TRUE,
      '#limit_validation_errors' => array(),
    );
    $form['handler']['handler_submit'] = array(
      '#type' => 'submit',
      '#value' => t('Change handler'),
      '#limit_validation_errors' => array(),
      '#attributes' => array(
        'class' => array('js-hide'),
      ),
      '#submit' => array('entity_reference_settings_ajax_submit'),
    );

    $form['handler']['handler_settings'] = array(
      '#type' => 'container',
      '#attributes' => array('class' => array('entity_reference-settings')),
    );

217 218
    $handler = \Drupal::service('plugin.manager.entity_reference.selection')->getSelectionHandler($instance);
    $form['handler']['handler_settings'] += $handler->settingsForm($instance);
219 220 221 222 223 224 225 226 227 228 229 230

    return $form;
  }

  /**
   * Form element validation handler; Stores the new values in the form state.
   *
   * @param array $form
   *   The form where the settings form is being included in.
   * @param array $form_state
   *   The form state of the (entire) configuration form.
   */
alexpott's avatar
alexpott committed
231
  public static function instanceSettingsFormValidate(array $form, array &$form_state) {
232 233
    if (isset($form_state['values']['instance'])) {
      unset($form_state['values']['instance']['settings']['handler_submit']);
234
      $form_state['instance']->settings = $form_state['values']['instance']['settings'];
235 236 237 238
    }
  }

}