<?php

/**
 * @file
 * Provides hook implementations for Layout Builder tests.
 */

use Drupal\Core\Entity\Display\EntityViewDisplayInterface;
use Drupal\Core\Entity\EntityInterface;

/**
 * Implements hook_plugin_filter_TYPE__CONSUMER_alter().
 */
function layout_builder_test_plugin_filter_block__layout_builder_alter(array &$definitions, array $extra) {
  // Explicitly remove the "Help" blocks from the list.
  unset($definitions['help_block']);

  // Explicitly remove the "Sticky at top of lists field_block".
  $disallowed_fields = [
    'sticky',
  ];

  // Remove "Changed" field if this is the first section.
  if ($extra['delta'] === 0) {
    $disallowed_fields[] = 'changed';
  }

  foreach ($definitions as $plugin_id => $definition) {
    // Field block IDs are in the form 'field_block:{entity}:{bundle}:{name}',
    // for example 'field_block:node:article:revision_timestamp'.
    preg_match('/field_block:.*:.*:(.*)/', $plugin_id, $parts);
    if (isset($parts[1]) && in_array($parts[1], $disallowed_fields, TRUE)) {
      // Unset any field blocks that match our predefined list.
      unset($definitions[$plugin_id]);
    }
  }
}

/**
 * Implements hook_entity_extra_field_info().
 */
function layout_builder_test_entity_extra_field_info() {
  $extra['node']['bundle_with_section_field']['display']['layout_builder_test'] = [
    'label' => t('Extra label'),
    'description' => t('Extra description'),
    'weight' => 0,
  ];
  return $extra;
}

/**
 * Implements hook_entity_node_view().
 */
function layout_builder_test_node_view(array &$build, EntityInterface $entity, EntityViewDisplayInterface $display, $view_mode) {
  if ($display->getComponent('layout_builder_test')) {
    $build['layout_builder_test'] = [
      '#markup' => 'Extra, Extra read all about it.',
    ];
  }
}