protected function PluginHierarchyTrait::buildPluginHierarchy in Plugin 8.2

Returns a hierarchical plugin representation.

Parameters

\Drupal\plugin\PluginDiscovery\TypedDiscoveryInterface $plugin_discovery: The typed plugin discovery.

Return value

array[] A possibly infinitely nested associative array. Keys are plugin IDs and values are arrays of similar structure as this method's return value.

1 call to PluginHierarchyTrait::buildPluginHierarchy()

SelectList::buildSelector in src/Plugin/Plugin/PluginSelector/SelectList.php

Builds the form elements for the actual plugin selector.

File

src/PluginHierarchyTrait.php, line 25

Class

PluginHierarchyTrait

Supports handling hierarchical plugins.

Namespace

Drupal\plugin

Code

protected function buildPluginHierarchy(TypedDiscoveryInterface $plugin_discovery) {
  $parents = [];
  $children = [];
  $definitions = $plugin_discovery
    ->getDefinitions();
  uasort($definitions, function (PluginDefinitionInterface $definition_a, PluginDefinitionInterface $definition_b) {
    $label_a = $definition_a instanceof PluginLabelDefinitionInterface ? $definition_a
      ->getLabel() : $definition_a
      ->getId();
    $label_b = $definition_b instanceof PluginLabelDefinitionInterface ? $definition_b
      ->getLabel() : $definition_b
      ->getId();
    return strcmp($label_a, $label_b);
  });
  foreach ($definitions as $plugin_id => $plugin_definition) {
    if ($plugin_definition instanceof PluginHierarchyDefinitionInterface && $plugin_definition
      ->getParentId()) {
      $children[$plugin_definition
        ->getParentId()][] = $plugin_id;
    }
    else {
      $parents[] = $plugin_id;
    }
  }
  return $this
    ->buildPluginHierarchyLevel($parents, $children);
}