drupal/core/modules/comment/comment.install

<?php

/**
 * @file
 * Install, update and uninstall functions for the Comment module.
 */

use Drupal\comment\Entity\Comment;
use Drupal\Core\Entity\EntityTypeInterface;
use Drupal\Core\StringTranslation\PluralTranslatableMarkup;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\field\Entity\FieldStorageConfig;

/**
 * Implements hook_uninstall().
 */
function comment_uninstall() {
  // Remove the comment fields.
  $fields = entity_load_multiple_by_properties('field_storage_config', ['type' => 'comment']);
  foreach ($fields as $field) {
    $field->delete();
  }

  // Remove state setting.
  \Drupal::state()->delete('comment.node_comment_statistics_scale');
}

/**
 * Implements hook_install().
 */
function comment_install() {
  // By default, maintain entity statistics for comments.
  // @see \Drupal\comment\CommentStatisticsInterface
  \Drupal::state()->set('comment.maintain_entity_statistics', TRUE);
}

/**
 * Implements hook_schema().
 */
function comment_schema() {
  $schema['comment_entity_statistics'] = [
    'description' => 'Maintains statistics of entity and comments posts to show "new" and "updated" flags.',
    'fields' => [
      'entity_id' => [
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The entity_id of the entity for which the statistics are compiled.',
      ],
      'entity_type' => [
        'type' => 'varchar_ascii',
        'not null' => TRUE,
        'default' => 'node',
        'length' => EntityTypeInterface::ID_MAX_LENGTH,
        'description' => 'The entity_type of the entity to which this comment is a reply.',
      ],
      'field_name' => [
        'type' => 'varchar_ascii',
        'not null' => TRUE,
        'default' => '',
        'length' => FieldStorageConfig::NAME_MAX_LENGTH,
        'description' => 'The field_name of the field that was used to add this comment.',
      ],
      'cid' => [
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The {comment}.cid of the last comment.',
      ],
      'last_comment_timestamp' => [
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The Unix timestamp of the last comment that was posted within this node, from {comment}.changed.',
      ],
      'last_comment_name' => [
        'type' => 'varchar',
        'length' => 60,
        'not null' => FALSE,
        'description' => 'The name of the latest author to post a comment on this node, from {comment}.name.',
      ],
      'last_comment_uid' => [
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The user ID of the latest author to post a comment on this node, from {comment}.uid.',
      ],
      'comment_count' => [
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The total number of comments on this entity.',
      ],
    ],
    'primary key' => ['entity_id', 'entity_type', 'field_name'],
    'indexes' => [
      'last_comment_timestamp' => ['last_comment_timestamp'],
      'comment_count' => ['comment_count'],
      'last_comment_uid' => ['last_comment_uid'],
    ],
    'foreign keys' => [
      'last_comment_author' => [
        'table' => 'users',
        'columns' => [
          'last_comment_uid' => 'uid',
        ],
      ],
    ],
  ];

  return $schema;
}

/**
 * Clear caches to fix Comment entity list builder and operations Views field.
 */
function comment_update_8001() {
  // Empty update to cause a cache flush to rebuild comment entity handler
  // information, so that comment operation links work.
}

/**
 * Clear caches to fix Comment Views context filter.
 */
function comment_update_8002() {
  // Empty update to cause a cache flush.
}

/**
 * Add the 'view_mode' setting to displays having 'comment_default' formatter.
 */
function comment_update_8200() {
  $config_factory = \Drupal::configFactory();
  $displays = [];
  // Iterate on all entity view displays.
  foreach ($config_factory->listAll('core.entity_view_display.') as $name) {
    $changed = FALSE;
    $display = $config_factory->getEditable($name);
    $components = $display->get('content') ?: [];
    foreach ($components as $field_name => $component) {
      if (isset($component['type']) && ($component['type'] === 'comment_default')) {
        if (empty($display->get("content.{$field_name}.settings.view_mode"))) {
          $display->set("content.{$field_name}.settings.view_mode", 'default');
          $displays[] = $display->get('id');
          $changed = TRUE;
        }
      }
    }

    if ($changed) {
      $display->save(TRUE);
    }
  }

  if ($displays) {
    return new PluralTranslatableMarkup(count($displays), '1 entity display updated: @displays.', '@count entity displays updated: @displays.', ['@displays' => implode(', ', $displays)]);
  }
  else {
    return new TranslatableMarkup('No entity view display updated.');
  }
}

/**
 * Update status field.
 */
function comment_update_8300() {
  $entity_definition_update_manager = \Drupal::service('entity.definition_update_manager');
  $field_definition = $entity_definition_update_manager->getFieldStorageDefinition('status', 'comment');
  $field_definition->setDescription(new TranslatableMarkup('A boolean indicating the published state.'))
    ->setRevisionable(TRUE);
  $entity_definition_update_manager->updateFieldStorageDefinition($field_definition);
}

/**
 * Set the 'published' entity key.
 */
function comment_update_8301() {
  $definition_update_manager = \Drupal::entityDefinitionUpdateManager();
  $entity_type = $definition_update_manager->getEntityType('comment');
  $keys = $entity_type->getKeys();
  $keys['published'] = 'status';
  $entity_type->set('entity_keys', $keys);
  $definition_update_manager->updateEntityType($entity_type);
}

/**
 * Update the status field.
 */
function comment_update_8400() {
  // The status field was promoted to an entity key in comment_update_8301(),
  // which makes it NOT NULL in the default SQL storage, which means its storage
  // definition needs to be updated as well.
  $entity_definition_update_manager = \Drupal::service('entity.definition_update_manager');
  $entity_definition_update_manager->updateFieldStorageDefinition($entity_definition_update_manager->getFieldStorageDefinition('status', 'comment'));
}

/**
 * Configure the comment hostname base field to use a default value callback.
 */
function comment_update_8600() {
  $entity_definition_update_manager = \Drupal::entityDefinitionUpdateManager();
  /** @var \Drupal\Core\Field\BaseFieldDefinition $field_storage_definition */
  $field_storage_definition = $entity_definition_update_manager->getFieldStorageDefinition('hostname', 'comment');
  $field_storage_definition->setDefaultValueCallback(Comment::class . '::getDefaultHostname');
  $entity_definition_update_manager->updateFieldStorageDefinition($field_storage_definition);
}

/**
 * Set the 'owner' entity key and update the field.
 */
function comment_update_8700() {
  $definition_update_manager = \Drupal::entityDefinitionUpdateManager();
  $entity_type = $definition_update_manager->getEntityType('comment');
  $keys = $entity_type->getKeys();
  $keys['owner'] = 'uid';
  $entity_type->set('entity_keys', $keys);
  $definition_update_manager->updateEntityType($entity_type);
  $definition_update_manager->updateFieldStorageDefinition($definition_update_manager->getFieldStorageDefinition('uid', 'comment'));
}

/**
 * Make the 'entity_type' and 'field_name' comment fields required.
 */
function comment_update_8701() {
  $definition_update_manager = \Drupal::entityDefinitionUpdateManager();
  $field_definition = $definition_update_manager->getFieldStorageDefinition('entity_type', 'comment');
  $field_definition->setRequired(TRUE);
  $definition_update_manager->updateFieldStorageDefinition($field_definition);

  $field_definition = $definition_update_manager->getFieldStorageDefinition('field_name', 'comment');
  $field_definition->setRequired(TRUE);
  $definition_update_manager->updateFieldStorageDefinition($field_definition);
}