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opencase/src/EntityTypeRelations.php

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<?php
namespace Drupal\opencase;
/**
* Stuff to do with the relationship of case types to actor types, and activity types to case types
*
*/
class EntityTypeRelations {
public static function getAllowedParentBundles($childEntityType, $childBundle) {
$field = $childEntityType == 'oc_case' ? 'actors_involved' : 'oc_case';
$base_field_override = \Drupal\Core\Field\Entity\BaseFieldOverride::load("$childEntityType.$childBundle.$field");
$allowedBundles = array();
if ($base_field_override) {
$targetBundleConfig = $base_field_override->getSettings()['handler_settings']['target_bundles'];
// example of $targetBudleConfig: ['client' => 'client', 'volunteer' => 0]
foreach($targetBundleConfig as $machine_name => $value) {
if ($value) {
$allowedBundles[] = $machine_name;
}
}
}
return $allowedBundles; // NB. this is an array of machine names only, indexed numerically.
}
public static function getAllowedChildBundles($parentEntityType, $parentBundle) {
$childEntityType = $parentEntityType == 'oc_case' ? 'oc_activity' : 'oc_case';
// get all the child bundles
$childBundles = \Drupal::service('entity_type.bundle.info')->getBundleInfo($childEntityType);
// $childBundles is array where the key is the machine name and the value is array containing label
$allowedChildBundles = array();
foreach(array_keys($childBundles) as $childBundle) {
if (in_array($parentBundle, self::getAllowedParentBundles($childEntityType, $childBundle))) {
$allowedChildBundles[$childBundle] = $childBundles[$childBundle]['label'];
}
}
return $allowedChildBundles; // NB. this is an array of labels, indexed by machine name.
}
}