class TermDevelGenerate

class TermDevelGenerate extends DevelGenerateBase implements ContainerFactoryPluginInterface {
    
    /**
     * The vocabulary storage.
     *
     * @var \Drupal\Core\Entity\EntityStorageInterface
     */
    protected $vocabularyStorage;
    
    /**
     * The term storage.
     *
     * @var \Drupal\Core\Entity\EntityStorageInterface
     */
    protected $termStorage;
    
    /**
     * Database connection.
     *
     * @var \Drupal\Core\Database\Connection
     */
    protected $database;
    
    /**
     * The module handler.
     *
     * @var \Drupal\Core\Extension\ModuleHandlerInterface
     */
    protected $moduleHandler;
    
    /**
     * The language manager.
     *
     * @var \Drupal\Core\Language\LanguageManagerInterface
     */
    protected $languageManager;
    
    /**
     * The content translation manager.
     *
     * @var \Drupal\content_translation\ContentTranslationManagerInterface
     */
    protected $contentTranslationManager;
    
    /**
     * Constructs a new TermDevelGenerate object.
     *
     * @param array $configuration
     *   A configuration array containing information about the plugin instance.
     * @param string $plugin_id
     *   The plugin_id for the plugin instance.
     * @param mixed $plugin_definition
     *   The plugin implementation definition.
     * @param \Drupal\Core\Entity\EntityStorageInterface $vocabulary_storage
     *   The vocabulary storage.
     * @param \Drupal\Core\Entity\EntityStorageInterface $term_storage
     *   The term storage.
     * @param \Drupal\Core\Database\Connection $database
     *   Database connection.
     * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
     *   The module handler.
     * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
     *   The language manager.
     * @param \Drupal\content_translation\ContentTranslationManagerInterface $content_translation_manager
     *   The content translation manager service.
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition, EntityStorageInterface $vocabulary_storage, EntityStorageInterface $term_storage, Connection $database, ModuleHandlerInterface $module_handler, LanguageManagerInterface $language_manager, ContentTranslationManagerInterface $content_translation_manager = NULL) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->vocabularyStorage = $vocabulary_storage;
        $this->termStorage = $term_storage;
        $this->database = $database;
        $this->moduleHandler = $module_handler;
        $this->languageManager = $language_manager;
        $this->contentTranslationManager = $content_translation_manager;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
        $entity_type_manager = $container->get('entity_type.manager');
        return new static($configuration, $plugin_id, $plugin_definition, $entity_type_manager->getStorage('taxonomy_vocabulary'), $entity_type_manager->getStorage('taxonomy_term'), $container->get('database'), $container->get('module_handler'), $container->get('language_manager'), $container->has('content_translation.manager') ? $container->get('content_translation.manager') : NULL);
    }
    
    /**
     * {@inheritdoc}
     */
    public function settingsForm(array $form, FormStateInterface $form_state) {
        $options = [];
        foreach ($this->vocabularyStorage
            ->loadMultiple() as $vocabulary) {
            $options[$vocabulary->id()] = $vocabulary->label();
        }
        // Sort by vocabulary label.
        asort($options);
        // Set default to 'tags' only if it exists as a vocabulary.
        $default_vids = array_key_exists('tags', $options) ? 'tags' : '';
        $form['vids'] = [
            '#type' => 'select',
            '#multiple' => TRUE,
            '#title' => $this->t('Vocabularies'),
            '#required' => TRUE,
            '#default_value' => $default_vids,
            '#options' => $options,
            '#description' => $this->t('Restrict terms to these vocabularies.'),
        ];
        $form['num'] = [
            '#type' => 'number',
            '#title' => $this->t('Number of terms'),
            '#default_value' => $this->getSetting('num'),
            '#required' => TRUE,
            '#min' => 0,
        ];
        $form['title_length'] = [
            '#type' => 'number',
            '#title' => $this->t('Maximum number of characters in term names'),
            '#default_value' => $this->getSetting('title_length'),
            '#required' => TRUE,
            '#min' => 2,
            '#max' => 255,
        ];
        $form['minimum_depth'] = [
            '#type' => 'number',
            '#title' => $this->t('Minimum depth for new terms in the vocabulary hierarchy'),
            '#description' => $this->t('Enter a value from 1 to 20.'),
            '#default_value' => $this->getSetting('minimum_depth'),
            '#min' => 1,
            '#max' => 20,
        ];
        $form['maximum_depth'] = [
            '#type' => 'number',
            '#title' => $this->t('Maximum depth for new terms in the vocabulary hierarchy'),
            '#description' => $this->t('Enter a value from 1 to 20.'),
            '#default_value' => $this->getSetting('maximum_depth'),
            '#min' => 1,
            '#max' => 20,
        ];
        $form['kill'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Delete existing terms in specified vocabularies before generating new terms.'),
            '#default_value' => $this->getSetting('kill'),
        ];
        // Add the language and translation options.
        $form += $this->getLanguageForm('terms');
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function generateElements(array $values) {
        $new_terms = $this->generateTerms($values);
        if (!empty($new_terms['terms'])) {
            $this->setMessage($this->formatPlural($new_terms['terms'], 'Created 1 new term', 'Created @count new terms'));
            // Helper function to format the number of terms and the list of terms.
            $format_terms_func = function ($data, $level) {
                if ($data['total'] > 10) {
                    $data['terms'][] = '...';
                }
                return $this->formatPlural($data['total'], '1 new term at level @level (@terms)', '@count new terms at level @level (@terms)', [
                    '@level' => $level,
                    '@terms' => implode(',', $data['terms']),
                ]);
            };
            foreach ($new_terms['vocabs'] as $vid => $vlabel) {
                if (array_key_exists($vid, $new_terms)) {
                    ksort($new_terms[$vid]);
                    $termlist = implode(', ', array_map($format_terms_func, $new_terms[$vid], array_keys($new_terms[$vid])));
                    $this->setMessage($this->t('In vocabulary @vlabel: @termlist', [
                        '@vlabel' => $vlabel,
                        '@termlist' => $termlist,
                    ]));
                }
                else {
                    $this->setMessage($this->t('In vocabulary @vlabel: No terms created', [
                        '@vlabel' => $vlabel,
                    ]));
                }
            }
        }
        if ($new_terms['terms_translations'] > 0) {
            $this->setMessage($this->formatPlural($new_terms['terms_translations'], 'Created 1 term translation', 'Created @count term translations'));
        }
    }
    
    /**
     * Deletes all terms of given vocabularies.
     *
     * @param array $vids
     *   Array of vocabulary ids.
     *
     * @return int
     *   The number of terms deleted.
     */
    protected function deleteVocabularyTerms(array $vids) {
        $tids = $this->vocabularyStorage
            ->getToplevelTids($vids);
        $terms = $this->termStorage
            ->loadMultiple($tids);
        $total_deleted = 0;
        foreach ($vids as $vid) {
            $total_deleted += count($this->termStorage
                ->loadTree($vid));
        }
        $this->termStorage
            ->delete($terms);
        return $total_deleted;
    }
    
    /**
     * Generates taxonomy terms for a list of given vocabularies.
     *
     * @param array $parameters
     *   The input parameters from the settings form or drush command.
     *
     * @return array
     *   Information about the created terms.
     */
    protected function generateTerms(array $parameters) {
        $info = [
            'terms' => 0,
            'terms_translations' => 0,
        ];
        $min_depth = $parameters['minimum_depth'];
        $max_depth = $parameters['maximum_depth'];
        // $parameters['vids'] from the UI has keys of the vocab ids. From drush
        // the array is keyed 0,1,2. Therefore create $vocabs which has keys of the
        // vocab ids, so it can be used with array_rand().
        $vocabs = array_combine($parameters['vids'], $parameters['vids']);
        // Delete terms from the vocabularies we are creating new terms in.
        if ($parameters['kill']) {
            $deleted = $this->deleteVocabularyTerms($vocabs);
            $this->setMessage($this->formatPlural($deleted, 'Deleted 1 existing term', 'Deleted @count existing terms'));
            if ($min_depth != 1) {
                $this->setMessage($this->t('Minimum depth changed from @min_depth to 1 because all terms were deleted', [
                    '@min_depth' => $min_depth,
                ]));
                $min_depth = 1;
            }
        }
        // Build an array of potential parents for the new terms. These will be
        // terms in the vocabularies we are creating in, which have a depth of one
        // less than the minimum for new terms up to one less than the maximum.
        $all_parents = [];
        foreach ($parameters['vids'] as $vid) {
            $info['vocabs'][$vid] = $this->vocabularyStorage
                ->load($vid)
                ->label();
            // Initialise the nested array for this vocabulary.
            $all_parents[$vid] = [
                'top_level' => [],
                'lower_levels' => [],
            ];
            for ($depth = 1; $depth < $max_depth; $depth++) {
                $query = \Drupal::entityQuery('taxonomy_term')->condition('vid', $vid);
                if ($depth == 1) {
                    // For the top level the parent id must be zero.
                    $query->condition('parent', 0);
                }
                else {
                    // For lower levels use the $ids array obtained in the previous loop.
                    // phpcs:ignore DrupalPractice.CodeAnalysis.VariableAnalysis.UndefinedVariable
                    $query->condition('parent', $ids, 'IN');
                }
                $ids = $query->execute();
                if (empty($ids)) {
                    // Reached the end, no more parents to be found.
                    break;
                }
                // Store these terms as parents if they are within the depth range for
                // new terms.
                if ($depth == $min_depth - 1) {
                    $all_parents[$vid]['top_level'] = array_fill_keys($ids, $depth);
                }
                elseif ($depth >= $min_depth) {
                    $all_parents[$vid]['lower_levels'] += array_fill_keys($ids, $depth);
                }
            }
            // No top-level parents will have been found above when the minimum depth
            // is 1 so add a record for that data here.
            if ($min_depth == 1) {
                $all_parents[$vid]['top_level'] = [
                    0 => 0,
                ];
            }
            elseif (empty($all_parents[$vid]['top_level'])) {
                // No parents for required minimum level so cannot use this vocabulary.
                unset($vocabs[$vid]);
            }
        }
        if (empty($vocabs)) {
            // There are no available parents at the required depth in any vocabulary
            // so we cannot create any new terms.
            throw new \Exception(sprintf('Invalid minimum depth %s because there are no terms in any vocabulary at depth %s', $min_depth, $min_depth - 1));
        }
        // Insert new data:
        for ($i = 1; $i <= $parameters['num']; $i++) {
            // Select a vocabulary at random.
            $vid = array_rand($vocabs);
            // Set the group to use to select a random parent from. Using < 50 means
            // on average half of the new terms will be top_level. Also if no terms
            // exist yet in 'lower_levels' then we have to use 'top_level'.
            $group = mt_rand(0, 100) < 50 || empty($all_parents[$vid]['lower_levels']) ? 'top_level' : 'lower_levels';
            $parent = array_rand($all_parents[$vid][$group]);
            $depth = $all_parents[$vid][$group][$parent] + 1;
            $name = $this->getRandom()
                ->word(mt_rand(2, $parameters['title_length']));
            $values = [
                'name' => $name,
                'description' => 'Description of ' . $name . ' (depth ' . $depth . ')',
                'format' => filter_fallback_format(),
                'weight' => mt_rand(0, 10),
                'vid' => $vid,
                'parent' => [
                    $parent,
                ],
            ];
            if (isset($parameters['add_language'])) {
                $values['langcode'] = $this->getLangcode($parameters['add_language']);
            }
            $term = $this->termStorage
                ->create($values);
            // Give hook implementations access to the parameters used for generation.
            $term->devel_generate = $parameters;
            // Populate all fields with sample values.
            $this->populateFields($term);
            $term->save();
            // Add translations.
            if (isset($parameters['translate_language']) && !empty($parameters['translate_language'])) {
                $info['terms_translations'] += $this->generateTermTranslation($parameters['translate_language'], $term);
            }
            // If the depth of the new term is less than the maximum depth then it can
            // also be saved as a potential parent for the subsequent new terms.
            if ($depth < $max_depth) {
                $all_parents[$vid]['lower_levels'] += [
                    $term->id() => $depth,
                ];
            }
            // Store data about the newly generated term.
            $info['terms']++;
            @$info[$vid][$depth]['total']++;
            // List only the first 10 new terms at each vocab/level.
            if (!isset($info[$vid][$depth]['terms']) || count($info[$vid][$depth]['terms']) < 10) {
                $info[$vid][$depth]['terms'][] = $term->label();
            }
            unset($term);
        }
        return $info;
    }
    
    /**
     * Create translation for the given term.
     *
     * @param array $translate_language
     *   Potential translate languages array.
     * @param \Drupal\taxonomy\TermInterface $term
     *   Term to add translations to.
     *
     * @return int
     *   Number of translations added.
     */
    protected function generateTermTranslation(array $translate_language, TermInterface $term) {
        if (is_null($this->contentTranslationManager)) {
            return 0;
        }
        if (!$this->contentTranslationManager
            ->isEnabled('taxonomy_term', $term->bundle())) {
            return 0;
        }
        if ($term->langcode == LanguageInterface::LANGCODE_NOT_SPECIFIED || $term->langcode == LanguageInterface::LANGCODE_NOT_APPLICABLE) {
            return 0;
        }
        $num_translations = 0;
        // Translate term to each target language.
        $skip_languages = [
            LanguageInterface::LANGCODE_NOT_SPECIFIED,
            LanguageInterface::LANGCODE_NOT_APPLICABLE,
            $term->langcode->value,
        ];
        foreach ($translate_language as $langcode) {
            if (in_array($langcode, $skip_languages)) {
                continue;
            }
            $translation_term = $term->addTranslation($langcode);
            $translation_term->setName($term->getName() . ' (' . $langcode . ')');
            $this->populateFields($translation_term);
            $translation_term->save();
            $num_translations++;
        }
        return $num_translations;
    }
    
    /**
     * {@inheritdoc}
     */
    public function validateDrushParams(array $args, array $options = []) {
        // Get default settings from the annotated command definition.
        $defaultSettings = $this->getDefaultSettings();
        $bundles = StringUtils::csvToarray($options['bundles']);
        if (count($bundles) < 1) {
            throw new \Exception(dt('Please provide a vocabulary machine name (--bundles).'));
        }
        foreach ($bundles as $bundle) {
            // Verify that each bundle is a valid vocabulary id.
            if (!$this->vocabularyStorage
                ->load($bundle)) {
                throw new \Exception(dt('Invalid vocabulary machine name: @name', [
                    '@name' => $bundle,
                ]));
            }
        }
        $number = array_shift($args) ?: $defaultSettings['num'];
        if (!$this->isNumber($number)) {
            throw new \Exception(dt('Invalid number of terms: @num', [
                '@num' => $number,
            ]));
        }
        $minimum_depth = $options['min-depth'] ?? $defaultSettings['minimum_depth'];
        $maximum_depth = $options['max-depth'] ?? $defaultSettings['maximum_depth'];
        if ($minimum_depth < 1 || $minimum_depth > 20 || $maximum_depth < 1 || $maximum_depth > 20 || $minimum_depth > $maximum_depth) {
            throw new \Exception(dt('The depth values must be in the range 1 to 20 and min-depth cannot be larger than max-depth (values given: min-depth @min, max-depth @max)', [
                '@min' => $minimum_depth,
                '@max' => $maximum_depth,
            ]));
        }
        $values = [
            'num' => $number,
            'kill' => $options['kill'],
            'title_length' => 12,
            'vids' => $bundles,
            'minimum_depth' => $minimum_depth,
            'maximum_depth' => $maximum_depth,
        ];
        $add_language = StringUtils::csvToArray($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);
        $translate_language = StringUtils::csvToArray($options['translations']);
        $values['translate_language'] = array_intersect($translate_language, $valid_languages);
        return $values;
    }

}