class ContentDevelGenerate

class ContentDevelGenerate extends DevelGenerateBase implements ContainerFactoryPluginInterface {
    
    /**
     * The node storage.
     */
    protected NodeStorageInterface $nodeStorage;
    
    /**
     * The node type storage.
     */
    protected EntityStorageInterface $nodeTypeStorage;
    
    /**
     * The user storage.
     */
    protected UserStorageInterface $userStorage;
    
    /**
     * The url generator service.
     */
    protected UrlGeneratorInterface $urlGenerator;
    
    /**
     * The alias storage.
     */
    protected PathAliasStorage $aliasStorage;
    
    /**
     * The date formatter service.
     */
    protected DateFormatterInterface $dateFormatter;
    
    /**
     * Provides system time.
     */
    protected TimeInterface $time;
    
    /**
     * Database connection.
     */
    protected Connection $database;
    
    /**
     * The extension path resolver service.
     */
    protected ExtensionPathResolver $extensionPathResolver;
    
    /**
     * The role storage.
     */
    protected RoleStorageInterface $roleStorage;
    
    /**
     * The comment manager service.
     */
    protected ?CommentManagerInterface $commentManager;
    
    /**
     * The content translation manager.
     */
    protected ?ContentTranslationManagerInterface $contentTranslationManager;
    
    /**
     * The Drush batch flag.
     */
    protected bool $drushBatch = FALSE;
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) : static {
        $entity_type_manager = $container->get('entity_type.manager');
        // @phpstan-ignore ternary.alwaysTrue (False positive)
        $comment_manager = $container->has('comment.manager') ? $container->get('comment.manager') : NULL;
        // @phpstan-ignore ternary.alwaysTrue (False positive)
        $content_translation_manager = $container->has('content_translation.manager') ? $container->get('content_translation.manager') : NULL;
        $instance = parent::create($container, $configuration, $plugin_id, $plugin_definition);
        $instance->nodeTypeStorage = $entity_type_manager->getStorage('node_type');
        $instance->nodeStorage = $entity_type_manager->getStorage('node');
        $instance->userStorage = $entity_type_manager->getStorage('user');
        $instance->urlGenerator = $container->get('url_generator');
        $instance->aliasStorage = $entity_type_manager->getStorage('path_alias');
        $instance->dateFormatter = $container->get('date.formatter');
        $instance->time = $container->get('datetime.time');
        $instance->database = $container->get('database');
        $instance->extensionPathResolver = $container->get('extension.path.resolver');
        $instance->roleStorage = $entity_type_manager->getStorage('user_role');
        $instance->commentManager = $comment_manager;
        $instance->contentTranslationManager = $content_translation_manager;
        return $instance;
    }
    
    /**
     * {@inheritdoc}
     */
    public function settingsForm(array $form, FormStateInterface $form_state) : array {
        $types = $this->nodeTypeStorage
            ->loadMultiple();
        if (empty($types)) {
            $create_url = $this->urlGenerator
                ->generateFromRoute('node.type_add');
            $this->setMessage($this->t('You do not have any content types that can be generated. <a href=":create-type">Go create a new content type</a>', [
                ':create-type' => $create_url,
            ]), 'error');
            return [];
        }
        $options = [];
        foreach ($types as $type) {
            $options[$type->id()] = [
                'type' => [
                    '#markup' => $type->label(),
                ],
            ];
            if ($this->commentManager instanceof CommentManagerInterface) {
                $comment_fields = $this->commentManager
                    ->getFields('node');
                $map = [
                    $this->t('Hidden'),
                    $this->t('Closed'),
                    $this->t('Open'),
                ];
                $fields = [];
                foreach ($comment_fields as $field_name => $info) {
                    // Find all comment fields for the bundle.
                    if (in_array($type->id(), $info['bundles'])) {
                        $instance = FieldConfig::loadByName('node', $type->id(), $field_name);
                        $default_value = $instance->getDefaultValueLiteral();
                        $default_mode = reset($default_value);
                        $fields[] = new FormattableMarkup('@field: @state', [
                            '@field' => $instance->label(),
                            '@state' => $map[$default_mode['status']],
                        ]);
                    }
                }
                // @todo Refactor display of comment fields.
                if ($fields !== []) {
                    $options[$type->id()]['comments'] = [
                        'data' => [
                            '#theme' => 'item_list',
                            '#items' => $fields,
                        ],
                    ];
                }
                else {
                    $options[$type->id()]['comments'] = $this->t('No comment fields');
                }
            }
        }
        $header = [
            'type' => $this->t('Content type'),
        ];
        if ($this->commentManager instanceof CommentManagerInterface) {
            $header['comments'] = [
                'data' => $this->t('Comments'),
                'class' => [
                    RESPONSIVE_PRIORITY_MEDIUM,
                ],
            ];
        }
        $form['node_types'] = [
            '#type' => 'tableselect',
            '#header' => $header,
            '#options' => $options,
        ];
        $form['kill'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('<strong>Delete all content</strong> in these content types before generating new content.'),
            '#default_value' => $this->getSetting('kill'),
        ];
        $form['num'] = [
            '#type' => 'number',
            '#title' => $this->t('How many nodes would you like to generate?'),
            '#default_value' => $this->getSetting('num'),
            '#required' => TRUE,
            '#min' => 0,
        ];
        $options = [
            1 => $this->t('Now'),
        ];
        foreach ([
            3600,
            86400,
            604800,
            2592000,
            31536000,
        ] as $interval) {
            $options[$interval] = $this->dateFormatter
                ->formatInterval($interval, 1) . ' ' . $this->t('ago');
        }
        $form['time_range'] = [
            '#type' => 'select',
            '#title' => $this->t('How far back in time should the nodes be dated?'),
            '#description' => $this->t('Node creation dates will be distributed randomly from the current time, back to the selected time.'),
            '#options' => $options,
            '#default_value' => 604800,
        ];
        $form['max_comments'] = [
            '#type' => $this->moduleHandler
                ->moduleExists('comment') ? 'number' : 'value',
            '#title' => $this->t('Maximum number of comments per node.'),
            '#description' => $this->t('You must also enable comments for the content types you are generating. Note that some nodes will randomly receive zero comments. Some will receive the max.'),
            '#default_value' => $this->getSetting('max_comments'),
            '#min' => 0,
            '#access' => $this->moduleHandler
                ->moduleExists('comment'),
        ];
        $form['title_length'] = [
            '#type' => 'number',
            '#title' => $this->t('Maximum number of words in titles'),
            '#default_value' => $this->getSetting('title_length'),
            '#required' => TRUE,
            '#min' => 1,
            '#max' => 255,
        ];
        $form['skip_fields'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Fields to leave empty'),
            '#description' => $this->t('Enter the field names as a comma-separated list. These will be skipped and have a default value in the generated content.'),
            '#default_value' => NULL,
        ];
        $form['base_fields'] = [
            '#type' => 'textfield',
            '#title' => $this->t('Base fields to populate'),
            '#description' => $this->t('Enter the field names as a comma-separated list. These will be populated.'),
            '#default_value' => NULL,
        ];
        $form['add_type_label'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Prefix the title with the content type label.'),
            '#description' => $this->t('This will not count against the maximum number of title words specified above.'),
            '#default_value' => $this->getSetting('add_type_label'),
        ];
        $form['add_alias'] = [
            '#type' => 'checkbox',
            '#disabled' => !$this->moduleHandler
                ->moduleExists('path'),
            '#description' => $this->t('Requires path.module'),
            '#title' => $this->t('Add an url alias for each node.'),
            '#default_value' => FALSE,
        ];
        $form['add_statistics'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Add statistics for each node (node_counter table).'),
            '#default_value' => TRUE,
            '#access' => $this->moduleHandler
                ->moduleExists('statistics'),
        ];
        // Add the language and translation options.
        $form += $this->getLanguageForm('nodes');
        // Add the user selection checkboxes.
        $author_header = [
            'id' => $this->t('User ID'),
            'user' => $this->t('Name'),
            'role' => $this->t('Role(s)'),
        ];
        $num_users = $this->database
            ->select('users')
            ->countQuery()
            ->execute()
            ->fetchField();
        $author_form_limit = 50;
        $query = $this->database
            ->select('users', 'u')
            ->fields('u', [
            'uid',
        ])
            ->range(0, $author_form_limit)
            ->orderBy('uid');
        $uids = $query->execute()
            ->fetchCol();
        $author_rows = [];
        foreach ($uids as $uid) {
            
            /** @var \Drupal\user\UserInterface $user */
            $user = $this->userStorage
                ->load($uid);
            $author_rows[$user->id()] = [
                'id' => [
                    '#markup' => $user->id(),
                ],
                'user' => [
                    '#markup' => $user->getAccountName(),
                ],
                'role' => [
                    '#markup' => implode(", ", $user->getRoles()),
                ],
            ];
        }
        $form['authors-wrap'] = [
            '#type' => 'details',
            '#title' => $this->t('Users'),
            '#open' => FALSE,
            '#description' => $this->t('Select users for randomly assigning as authors of the generated content.') . ($num_users > $author_form_limit ? ' ' . $this->t('The site has @num_users users, only the first @$author_form_limit are shown and selectable here.', [
                '@num_users' => $num_users,
                '@$author_form_limit' => $author_form_limit,
            ]) : ''),
        ];
        $form['authors-wrap']['authors'] = [
            '#type' => 'tableselect',
            '#header' => $author_header,
            '#options' => $author_rows,
        ];
        $role_rows = [];
        $roles = array_map(static fn($role): string => $role->label(), $this->roleStorage
            ->loadMultiple());
        foreach ($roles as $role_id => $role_name) {
            $role_rows[$role_id] = [
                'id' => [
                    '#markup' => $role_id,
                ],
                'role' => [
                    '#markup' => $role_name,
                ],
            ];
        }
        $form['authors-wrap']['roles'] = [
            '#type' => 'tableselect',
            '#header' => [
                'id' => $this->t('Role ID'),
                'role' => $this->t('Role Description'),
            ],
            '#options' => $role_rows,
            '#prefix' => $this->t('Specify the roles that randomly selected authors must have.'),
            '#suffix' => $this->t('You can select users and roles. Authors will be randomly selected that match at least one of the criteria. Leave <em>both</em> selections unchecked to use a random selection of @$author_form_limit users, including Anonymous.', [
                '@$author_form_limit' => $author_form_limit,
            ]),
        ];
        $form['#redirect'] = FALSE;
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function settingsFormValidate(array $form, FormStateInterface $form_state) : void {
        if (array_filter($form_state->getValue('node_types')) === []) {
            $form_state->setErrorByName('node_types', $this->t('Please select at least one content type'));
        }
        $skip_fields = is_null($form_state->getValue('skip_fields')) ? [] : self::csvToArray($form_state->getValue('skip_fields'));
        $base_fields = is_null($form_state->getValue('base_fields')) ? [] : self::csvToArray($form_state->getValue('base_fields'));
        $form_state->setValue('skip_fields', $skip_fields);
        $form_state->setValue('base_fields', $base_fields);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function generateElements(array $values) : void {
        if ($this->isBatch($values['num'], $values['max_comments'])) {
            $this->generateBatchContent($values);
        }
        else {
            $this->generateContent($values);
        }
    }
    
    /**
     * Generate content when not in batch mode.
     *
     * This method is used when the number of elements is under 50.
     */
    private function generateContent(array $values) : void {
        $values['node_types'] = array_filter($values['node_types']);
        if (!empty($values['kill']) && $values['node_types']) {
            $this->contentKill($values);
        }
        if ($values['node_types'] !== []) {
            // Generate nodes.
            $this->develGenerateContentPreNode($values);
            $start = time();
            $values['num_translations'] = 0;
            for ($i = 1; $i <= $values['num']; ++$i) {
                $this->develGenerateContentAddNode($values);
                if (isset($values['feedback']) && $i % $values['feedback'] == 0) {
                    $now = time();
                    $options = [
                        '@feedback' => $values['feedback'],
                        '@rate' => $values['feedback'] * 60 / ($now - $start),
                    ];
                    $this->messenger
                        ->addStatus(dt('Completed @feedback nodes (@rate nodes/min)', $options));
                    $start = $now;
                }
            }
        }
        $this->setMessage($this->formatPlural($values['num'], 'Created 1 node', 'Created @count nodes'));
        if ($values['num_translations'] > 0) {
            $this->setMessage($this->formatPlural($values['num_translations'], 'Created 1 node translation', 'Created @count node translations'));
        }
    }
    
    /**
     * Generate content in batch mode.
     *
     * This method is used when the number of elements is 50 or more.
     */
    private function generateBatchContent(array $values) : void {
        $operations = [];
        // Remove unselected node types.
        $values['node_types'] = array_filter($values['node_types']);
        // If it is drushBatch then this operation is already run in the
        // self::validateDrushParams().
        if (!$this->drushBatch) {
            // Setup the batch operations and save the variables.
            $operations[] = [
                'devel_generate_operation',
                [
                    $this,
                    'batchContentPreNode',
                    $values,
                ],
            ];
        }
        // Add the kill operation.
        if ($values['kill']) {
            $operations[] = [
                'devel_generate_operation',
                [
                    $this,
                    'batchContentKill',
                    $values,
                ],
            ];
        }
        // Add the operations to create the nodes.
        for ($num = 0; $num < $values['num']; ++$num) {
            $operations[] = [
                'devel_generate_operation',
                [
                    $this,
                    'batchContentAddNode',
                    $values,
                ],
            ];
        }
        // Set the batch.
        $batch = [
            'title' => $this->t('Generating Content'),
            'operations' => $operations,
            'finished' => 'devel_generate_batch_finished',
            'file' => $this->extensionPathResolver
                ->getPath('module', 'devel_generate') . '/devel_generate.batch.inc',
        ];
        batch_set($batch);
        if ($this->drushBatch) {
            drush_backend_batch_process();
        }
    }
    
    /**
     * Batch wrapper for calling ContentPreNode.
     */
    public function batchContentPreNode($vars, array &$context) : void {
        $context['results'] = $vars;
        $context['results']['num'] = 0;
        $context['results']['num_translations'] = 0;
        $this->develGenerateContentPreNode($context['results']);
    }
    
    /**
     * Batch wrapper for calling ContentAddNode.
     */
    public function batchContentAddNode(array $vars, array &$context) : void {
        if ($this->drushBatch) {
            $this->develGenerateContentAddNode($vars);
        }
        else {
            $this->develGenerateContentAddNode($context['results']);
        }
        if (!isset($context['results']['num'])) {
            $context['results']['num'] = 0;
        }
        ++$context['results']['num'];
        if (!empty($vars['num_translations'])) {
            $context['results']['num_translations'] += $vars['num_translations'];
        }
    }
    
    /**
     * Batch wrapper for calling ContentKill.
     */
    public function batchContentKill(array $vars, array &$context) : void {
        if ($this->drushBatch) {
            $this->contentKill($vars);
        }
        else {
            $this->contentKill($context['results']);
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function validateDrushParams(array $args, array $options = []) : array {
        $add_language = self::csvToArray($options['languages']);
        // Intersect with the enabled languages to make sure the language args
        // passed are actually enabled.
        $valid_languages = array_keys($this->languageManager
            ->getLanguages(LanguageInterface::STATE_ALL));
        $values['add_language'] = array_intersect($add_language, $valid_languages);
        $translate_language = self::csvToArray($options['translations']);
        $values['translate_language'] = array_intersect($translate_language, $valid_languages);
        $values['add_type_label'] = $options['add-type-label'];
        $values['kill'] = $options['kill'];
        $values['feedback'] = $options['feedback'];
        $values['skip_fields'] = is_null($options['skip-fields']) ? [] : self::csvToArray($options['skip-fields']);
        $values['base_fields'] = is_null($options['base-fields']) ? [] : self::csvToArray($options['base-fields']);
        $values['title_length'] = 6;
        $values['num'] = array_shift($args);
        $values['max_comments'] = array_shift($args);
        // Do not use csvToArray for 'authors' because it removes '0' values.
        $values['authors'] = is_null($options['authors']) ? [] : explode(',', $options['authors']);
        $values['roles'] = self::csvToArray($options['roles']);
        $all_types = array_keys(node_type_get_names());
        $default_types = array_intersect([
            'page',
            'article',
        ], $all_types);
        $selected_types = self::csvToArray($options['bundles'] ?: $default_types);
        if ($selected_types === []) {
            throw new \Exception(dt('No content types available'));
        }
        $values['node_types'] = array_combine($selected_types, $selected_types);
        $node_types = array_filter($values['node_types']);
        if (!empty($values['kill']) && $node_types === []) {
            throw new \Exception(dt('To delete content, please provide the content types (--bundles)'));
        }
        // Checks for any missing content types before generating nodes.
        if (array_diff($node_types, $all_types) !== []) {
            throw new \Exception(dt('One or more content types have been entered that don\'t exist on this site'));
        }
        if ($this->isBatch($values['num'], $values['max_comments'])) {
            $this->drushBatch = TRUE;
            $this->develGenerateContentPreNode($values);
        }
        return $values;
    }
    
    /**
     * Determines if the content should be generated in batch mode.
     */
    protected function isBatch(int $content_count, int $comment_count) : bool {
        return $content_count >= 50 || $comment_count >= 10;
    }
    
    /**
     * Deletes all nodes of given node types.
     *
     * @param array $values
     *   The input values from the settings form.
     */
    protected function contentKill(array $values) : void {
        $nids = $this->nodeStorage
            ->getQuery()
            ->condition('type', $values['node_types'], 'IN')
            ->accessCheck(FALSE)
            ->execute();
        if (!empty($nids)) {
            $nodes = $this->nodeStorage
                ->loadMultiple($nids);
            $this->nodeStorage
                ->delete($nodes);
            $this->setMessage($this->t('Deleted @count nodes.', [
                '@count' => count($nids),
            ]));
        }
    }
    
    /**
     * Preprocesses $results before adding content.
     *
     * @param array $results
     *   Results information.
     */
    protected function develGenerateContentPreNode(array &$results) : void {
        $authors = $results['authors'];
        // Remove non-selected users. !== 0 will leave the Anonymous user in if it
        // was selected on the form or entered in the drush parameters.
        $authors = array_filter($authors, static fn($k): bool => $k !== 0);
        // Likewise remove non-selected roles.
        $roles = $results['roles'];
        $roles = array_filter($roles, static fn($k): bool => $k !== 0);
        // If specific roles have been selected then also add up to 50 users who
        // have one of these roles. There is no direct way randomise the selection
        // using entity queries, so we use a database query instead.
        if ($roles !== [] && !in_array('authenticated', $roles)) {
            $query = $this->database
                ->select('user__roles', 'ur')
                ->fields('ur', [
                'entity_id',
                'roles_target_id',
            ])
                ->condition('roles_target_id', $roles, 'in')
                ->range(0, 50)
                ->orderRandom();
            $uids = array_unique($query->execute()
                ->fetchCol());
            // If the 'anonymous' role is selected, then add '0' to the user ids. Also
            // do this if no users were specified and none were found with the role(s)
            // requested. This makes it clear that no users were found. It would be
            // worse to fall through and select completely random users who do not
            // have any of the roles requested.
            if (in_array('anonymous', $roles) || $authors === [] && $uids === []) {
                $uids[] = '0';
            }
            $authors = array_unique(array_merge($authors, $uids));
        }
        // If still no authors have been collected, or the 'authenticated' role was
        // requested then add a random set of users up to a maximum of 50.
        if ($authors === [] || in_array('authenticated', $roles)) {
            $query = $this->database
                ->select('users', 'u')
                ->fields('u', [
                'uid',
            ])
                ->range(0, 50)
                ->orderRandom();
            $uids = $query->execute()
                ->fetchCol();
            $authors = array_unique(array_merge($authors, $uids));
        }
        $results['users'] = $authors;
    }
    
    /**
     * Create one node. Used by both batch and non-batch code branches.
     *
     * @param array $results
     *   Results information.
     */
    protected function develGenerateContentAddNode(array &$results) : void {
        if (!isset($results['time_range'])) {
            $results['time_range'] = 0;
        }
        $users = $results['users'];
        $node_type = array_rand($results['node_types']);
        $uid = $users[array_rand($users)];
        // Add the content type label if required.
        $title_prefix = $results['add_type_label'] ? $this->nodeTypeStorage
            ->load($node_type)
            ->label() . ' - ' : '';
        $values = [
            'nid' => NULL,
            'type' => $node_type,
            'title' => $title_prefix . $this->getRandom()
                ->sentences(mt_rand(1, $results['title_length']), TRUE),
            'uid' => $uid,
            'revision' => mt_rand(0, 1),
            'moderation_state' => 'published',
            'status' => TRUE,
            'promote' => mt_rand(0, 1),
            'created' => $this->time
                ->getRequestTime() - mt_rand(0, $results['time_range']),
            // A flag to let hook_node_insert() implementations know that this is a
            // generated node.
'devel_generate' => $results,
        ];
        if (isset($results['add_language'])) {
            $values['langcode'] = $this->getLangcode($results['add_language']);
        }
        
        /** @var \Drupal\node\NodeInterface $node */
        $node = $this->nodeStorage
            ->create($values);
        // Populate non-skipped fields with sample values.
        $this->populateFields($node, $results['skip_fields'], $results['base_fields']);
        // Remove the fields which are intended to have no value.
        foreach ($results['skip_fields'] as $field) {
            unset($node->{$field});
        }
        $node->save();
        $this->insertNodeData($node);
        // Add url alias if required.
        if (!empty($results['add_alias'])) {
            $path_alias = $this->aliasStorage
                ->create([
                'path' => '/node/' . $node->id(),
                'alias' => '/node-' . $node->id() . '-' . $node->bundle(),
                'langcode' => $values['langcode'] ?? LanguageInterface::LANGCODE_NOT_SPECIFIED,
            ]);
            $path_alias->save();
        }
        // Add translations.
        $this->develGenerateContentAddNodeTranslation($results, $node);
    }
    
    /**
     * Create translation for the given node.
     *
     * @param array $results
     *   Results array.
     * @param \Drupal\node\NodeInterface $node
     *   Node to add translations to.
     *
     * @throws \Drupal\Core\Entity\EntityStorageException
     */
    protected function develGenerateContentAddNodeTranslation(array &$results, NodeInterface $node) : void {
        if (empty($results['translate_language'])) {
            return;
        }
        if (is_null($this->contentTranslationManager)) {
            return;
        }
        if (!$this->contentTranslationManager
            ->isEnabled('node', $node->getType())) {
            return;
        }
        if ($node->get('langcode')
            ->getLangcode() === LanguageInterface::LANGCODE_NOT_SPECIFIED || $node->get('langcode')
            ->getLangcode() === LanguageInterface::LANGCODE_NOT_APPLICABLE) {
            return;
        }
        if (!isset($results['num_translations'])) {
            $results['num_translations'] = 0;
        }
        // Translate node to each target language.
        $skip_languages = [
            LanguageInterface::LANGCODE_NOT_SPECIFIED,
            LanguageInterface::LANGCODE_NOT_APPLICABLE,
            $node->get('langcode')
                ->getLangcode(),
        ];
        foreach ($results['translate_language'] as $langcode) {
            if (in_array($langcode, $skip_languages)) {
                continue;
            }
            $translation_node = $node->addTranslation($langcode);
            $translation_node->setTitle($node->getTitle() . ' (' . $langcode . ')');
            $this->populateFields($translation_node);
            $translation_node->save();
            if ($translation_node->id() > 0 && !empty($results['add_alias'])) {
                $path_alias = $this->aliasStorage
                    ->create([
                    'path' => '/node/' . $translation_node->id(),
                    'alias' => '/node-' . $translation_node->id() . '-' . $translation_node->bundle() . '-' . $langcode,
                    'langcode' => $langcode,
                ]);
                $path_alias->save();
            }
            ++$results['num_translations'];
        }
    }
    private function insertNodeData(NodeInterface $node) : void {
        if (!isset($node->devel_generate)) {
            return;
        }
        $results = $node->devel_generate;
        if (!empty($results['max_comments'])) {
            foreach ($node->getFieldDefinitions() as $field_name => $field_definition) {
                if ($field_definition->getType() !== 'comment') {
                    continue;
                }
                if ($node->get($field_name)
                    ->getValue()[0]['status'] !== CommentItemInterface::OPEN) {
                    continue;
                }
                // Add comments for each comment field on entity.
                $this->addNodeComments($node, $field_definition, $results['users'], $results['max_comments'], $results['title_length']);
            }
        }
        if ($results['add_statistics']) {
            $this->addNodeStatistics($node);
        }
    }
    
    /**
     * Create comments and add them to a node.
     *
     * @param \Drupal\node\NodeInterface $node
     *   Node to add comments to.
     * @param \Drupal\Core\Field\FieldDefinitionInterface $field_definition
     *   The field storage definition.
     * @param array $users
     *   Array of users to assign comment authors.
     * @param int $max_comments
     *   Max number of comments to generate per node.
     * @param int $title_length
     *   Max length of the title of the comments.
     */
    private function addNodeComments(NodeInterface $node, FieldDefinitionInterface $field_definition, array $users, int $max_comments, int $title_length = 8) : void {
        $parents = [];
        $commentStorage = $this->entityTypeManager
            ->getStorage('comment');
        $field_name = $field_definition->getName();
        $num_comments = mt_rand(0, $max_comments);
        for ($i = 1; $i <= $num_comments; ++$i) {
            $query = $commentStorage->getQuery();
            switch ($i % 3) {
                case 0:
                // No parent.
                case 1:
                    // Top level parent.
                    $parents = $query->condition('pid', 0)
                        ->condition('entity_id', $node->id())
                        ->condition('entity_type', 'node')
                        ->condition('field_name', $field_name)
                        ->range(0, 1)
                        ->accessCheck(FALSE)
                        ->execute();
                    break;
                case 2:
                    // Non top level parent.
                    $parents = $query->condition('pid', 0, '>')
                        ->condition('entity_id', $node->id())
                        ->condition('entity_type', 'node')
                        ->condition('field_name', $field_name)
                        ->range(0, 1)
                        ->accessCheck(FALSE)
                        ->execute();
                    break;
            }
            $random = new Random();
            $stub = [
                'entity_type' => $node->getEntityTypeId(),
                'entity_id' => $node->id(),
                'field_name' => $field_name,
                'name' => 'devel generate',
                'mail' => 'devel_generate@example.com',
                'timestamp' => mt_rand($node->getCreatedTime(), $this->time
                    ->getRequestTime()),
                'subject' => substr($random->sentences(mt_rand(1, $title_length), TRUE), 0, 63),
                'uid' => $users[array_rand($users)],
                'langcode' => $node->language()
                    ->getId(),
            ];
            if ($parents) {
                $stub['pid'] = current($parents);
            }
            $comment = $commentStorage->create($stub);
            // Populate all core fields.
            $this->populateFields($comment);
            $comment->save();
        }
    }
    
    /**
     * Generate statistics information for a node.
     *
     * @param \Drupal\node\NodeInterface $node
     *   A node object.
     */
    private function addNodeStatistics(NodeInterface $node) : void {
        if (!$this->moduleHandler
            ->moduleExists('statistics')) {
            return;
        }
        $statistic = [
            'nid' => $node->id(),
            'totalcount' => mt_rand(0, 500),
            'timestamp' => $this->time
                ->getRequestTime() - mt_rand(0, $node->getCreatedTime()),
        ];
        $statistic['daycount'] = mt_rand(0, $statistic['totalcount']);
        $this->database
            ->insert('node_counter')
            ->fields($statistic)
            ->execute();
    }

}