--- /dev/null
+<?php
+
+/**
+ * @file
+ * Install, update and uninstall functions for the Comment module.
+ */
+
+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);
+}