<?php

/**
 * @file
 * Adds UI Patterns themes and UI Elements.
 */

declare(strict_types=1);

/**
 * Implements hook_element_info_alter().
 */
function ui_patterns_element_info_alter(array &$types) {
  if (isset($types['component'])) {
    array_unshift($types['component']['#pre_render'], 'ui_patterns.component_element_alter:alter');
    array_unshift($types['component']['#pre_render'], 'ui_patterns.component_element_builder:build');
  }
}

/**
 * Implements hook_plugin_filter_TYPE__CONSUMER_alter().
 */
function ui_patterns_plugin_filter_block__ui_patterns_alter(array &$definitions, array $extra) {
  // Remove blocks that are not useful within Layout Builder.
  unset($definitions['system_messages_block']);
  unset($definitions['help_block']);
  unset($definitions['local_tasks_block']);
  unset($definitions['local_actions_block']);

  // Remove blocks that are non-functional within Layout Builder.
  unset($definitions['system_main_block']);
  // @todo Restore the page title block in https://www.drupal.org/node/2938129.
  unset($definitions['page_title_block']);

  foreach ($definitions as $id => $definition) {
    // Filter out any  block that has required context
    // definitions.
    if (/*$definition['provider'] === 'layout_builder' &&*/ !empty($definition['context_definitions'])) {
      /** @var \Drupal\Core\Plugin\Context\ContextDefinitionInterface $context_definition */
      foreach ($definition['context_definitions'] as $context_definition) {
        if ($context_definition->isRequired()) {
          unset($definitions[$id]);
          break;
        }
      }
    }
  }
}

/**
 * Implements hook_plugin_filter_TYPE_alter().
 */
function ui_patterns_plugin_filter_block_alter(array &$definitions, array $extra, $consumer) {
  // @todo Determine the 'inline_block' blocks should be allowed outside
  //   of layout_builder https://www.drupal.org/node/2979142.
  if ($consumer !== 'layout_builder' || !isset($extra['list']) || $extra['list'] !== 'inline_blocks') {
    foreach ($definitions as $id => $definition) {
      if ($definition['id'] === 'inline_block') {
        unset($definitions[$id]);
      }
    }
  }
}