class TaxonomyIndexTid

class TaxonomyIndexTid extends ManyToOne {
    
    /**
     * Stores the exposed input for this filter.
     *
     * @var array|null
     */
    // phpcs:ignore Drupal.NamingConventions.ValidVariableName.LowerCamelName
    public $validated_exposed_input = NULL;
    
    /**
     * The vocabulary storage.
     *
     * @var \Drupal\taxonomy\VocabularyStorageInterface
     */
    protected $vocabularyStorage;
    
    /**
     * The term storage.
     *
     * @var \Drupal\taxonomy\TermStorageInterface
     */
    protected $termStorage;
    
    /**
     * The current user.
     *
     * @var \Drupal\Core\Session\AccountInterface
     */
    protected $currentUser;
    
    /**
     * Constructs a TaxonomyIndexTid 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\taxonomy\VocabularyStorageInterface $vocabulary_storage
     *   The vocabulary storage.
     * @param \Drupal\taxonomy\TermStorageInterface $term_storage
     *   The term storage.
     * @param \Drupal\Core\Session\AccountInterface $current_user
     *   The current user.
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition, VocabularyStorageInterface $vocabulary_storage, TermStorageInterface $term_storage, AccountInterface $current_user) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->vocabularyStorage = $vocabulary_storage;
        $this->termStorage = $term_storage;
        $this->currentUser = $current_user;
    }
    
    /**
     * {@inheritdoc}
     */
    public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
        return new static($configuration, $plugin_id, $plugin_definition, $container->get('entity_type.manager')
            ->getStorage('taxonomy_vocabulary'), $container->get('entity_type.manager')
            ->getStorage('taxonomy_term'), $container->get('current_user'));
    }
    
    /**
     * {@inheritdoc}
     */
    public function init(ViewExecutable $view, DisplayPluginBase $display, ?array &$options = NULL) {
        parent::init($view, $display, $options);
        if (!empty($this->definition['vocabulary'])) {
            $this->options['vid'] = $this->definition['vocabulary'];
        }
    }
    public function hasExtraOptions() {
        return TRUE;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getValueOptions() {
        return $this->valueOptions;
    }
    protected function defineOptions() {
        $options = parent::defineOptions();
        $options['type'] = [
            'default' => 'textfield',
        ];
        $options['limit'] = [
            'default' => TRUE,
        ];
        $options['vid'] = [
            'default' => '',
        ];
        $options['hierarchy'] = [
            'default' => FALSE,
        ];
        $options['error_message'] = [
            'default' => TRUE,
        ];
        return $options;
    }
    public function buildExtraOptionsForm(&$form, FormStateInterface $form_state) {
        $vocabularies = $this->vocabularyStorage
            ->loadMultiple();
        $options = [];
        foreach ($vocabularies as $voc) {
            $options[$voc->id()] = $voc->label();
        }
        if ($this->options['limit']) {
            // We only do this when the form is displayed.
            if (empty($this->options['vid'])) {
                $first_vocabulary = reset($vocabularies);
                $this->options['vid'] = $first_vocabulary->id();
            }
            if (empty($this->definition['vocabulary'])) {
                $form['vid'] = [
                    '#type' => 'radios',
                    '#title' => $this->t('Vocabulary'),
                    '#options' => $options,
                    '#description' => $this->t('Select which vocabulary to show terms for in the regular options.'),
                    '#default_value' => $this->options['vid'],
                ];
            }
        }
        $form['type'] = [
            '#type' => 'radios',
            '#title' => $this->t('Selection type'),
            '#options' => [
                'select' => $this->t('Dropdown'),
                'textfield' => $this->t('Autocomplete'),
            ],
            '#default_value' => $this->options['type'],
        ];
        $form['hierarchy'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Show hierarchy in dropdown'),
            '#default_value' => !empty($this->options['hierarchy']),
            '#states' => [
                'visible' => [
                    ':input[name="options[type]"]' => [
                        'value' => 'select',
                    ],
                ],
            ],
        ];
    }
    protected function valueForm(&$form, FormStateInterface $form_state) {
        $vocabulary = $this->vocabularyStorage
            ->load($this->options['vid']);
        if (empty($vocabulary) && $this->options['limit']) {
            $form['markup'] = [
                '#markup' => '<div class="js-form-item form-item">' . $this->t('An invalid vocabulary is selected. Change it in the options.') . '</div>',
            ];
            return;
        }
        if ($this->options['type'] == 'textfield') {
            $terms = $this->value ? Term::loadMultiple($this->value) : [];
            $form['value'] = [
                '#title' => $this->options['limit'] ? $this->t('Select terms from vocabulary @voc', [
                    '@voc' => $vocabulary->label(),
                ]) : $this->t('Select terms'),
                '#type' => 'textfield',
                '#default_value' => EntityAutocomplete::getEntityLabels($terms),
            ];
            if ($this->options['limit']) {
                $form['value']['#type'] = 'entity_autocomplete';
                $form['value']['#target_type'] = 'taxonomy_term';
                $form['value']['#selection_settings']['target_bundles'] = [
                    $vocabulary->id(),
                ];
                $form['value']['#tags'] = TRUE;
                $form['value']['#process_default_value'] = FALSE;
            }
        }
        else {
            if (!empty($this->options['hierarchy']) && $this->options['limit']) {
                $tree = $this->termStorage
                    ->loadTree($vocabulary->id(), 0, NULL, TRUE);
                $options = [];
                if ($tree) {
                    foreach ($tree as $term) {
                        if (!$term->isPublished() && !$this->currentUser
                            ->hasPermission('administer taxonomy')) {
                            continue;
                        }
                        $choice = new \stdClass();
                        $choice->option = [
                            $term->id() => str_repeat('-', $term->depth) . \Drupal::service('entity.repository')->getTranslationFromContext($term)
                                ->label(),
                        ];
                        $options[] = $choice;
                    }
                }
            }
            else {
                $options = [];
                $query = \Drupal::entityQuery('taxonomy_term')->accessCheck(TRUE)
                    ->sort('weight')
                    ->sort('name')
                    ->addTag('taxonomy_term_access');
                if (!$this->currentUser
                    ->hasPermission('administer taxonomy')) {
                    $query->condition('status', 1);
                }
                if ($this->options['limit']) {
                    $query->condition('vid', $vocabulary->id());
                }
                $terms = Term::loadMultiple($query->execute());
                foreach ($terms as $term) {
                    $options[$term->id()] = \Drupal::service('entity.repository')->getTranslationFromContext($term)
                        ->label();
                }
            }
            $default_value = (array) $this->value;
            if ($exposed = $form_state->get('exposed')) {
                $identifier = $this->options['expose']['identifier'];
                if (!empty($this->options['expose']['reduce'])) {
                    $options = $this->reduceValueOptions($options);
                    if (!empty($this->options['expose']['multiple']) && empty($this->options['expose']['required'])) {
                        $default_value = [];
                    }
                }
                if (empty($this->options['expose']['multiple'])) {
                    if (empty($this->options['expose']['required']) && (empty($default_value) || !empty($this->options['expose']['reduce']))) {
                        $default_value = 'All';
                    }
                    elseif (empty($default_value)) {
                        $keys = array_keys($options);
                        $default_value = array_shift($keys);
                    }
                    elseif ($default_value == [
                        '',
                    ]) {
                        $default_value = 'All';
                    }
                    else {
                        $copy = $default_value;
                        $default_value = array_shift($copy);
                    }
                }
            }
            $form['value'] = [
                '#type' => 'select',
                '#title' => $this->options['limit'] ? $this->t('Select terms from vocabulary @voc', [
                    '@voc' => $vocabulary->label(),
                ]) : $this->t('Select terms'),
                '#multiple' => TRUE,
                '#options' => $options,
                '#size' => min(9, count($options)),
                '#default_value' => $default_value,
            ];
            $user_input = $form_state->getUserInput();
            if ($exposed && isset($identifier) && !isset($user_input[$identifier])) {
                $user_input[$identifier] = $default_value;
                $form_state->setUserInput($user_input);
            }
        }
        if (!$form_state->get('exposed')) {
            // Retain the helper option
            $this->helper
                ->buildOptionsForm($form, $form_state);
            // Show help text if not exposed to end users.
            $form['value']['#description'] = $this->t('Leave blank for all. Otherwise, the first selected term will be the default instead of "Any".');
        }
    }
    protected function valueValidate($form, FormStateInterface $form_state) {
        // We only validate if they've chosen the text field style.
        if ($this->options['type'] != 'textfield') {
            return;
        }
        $tids = [];
        if ($values = $form_state->getValue([
            'options',
            'value',
        ])) {
            foreach ($values as $value) {
                $tids[] = $value['target_id'];
            }
        }
        $form_state->setValue([
            'options',
            'value',
        ], $tids);
    }
    public function acceptExposedInput($input) {
        if (empty($this->options['exposed'])) {
            return TRUE;
        }
        // We need to know the operator, which is normally set in
        // \Drupal\views\Plugin\views\filter\FilterPluginBase::acceptExposedInput(),
        // before we actually call the parent version of ourselves.
        if (!empty($this->options['expose']['use_operator']) && !empty($this->options['expose']['operator_id']) && isset($input[$this->options['expose']['operator_id']])) {
            $this->operator = $input[$this->options['expose']['operator_id']];
        }
        // If view is an attachment and is inheriting exposed filters, then assume
        // exposed input has already been validated
        if (!empty($this->view->is_attachment) && $this->view->display_handler
            ->usesExposed()) {
            $this->validated_exposed_input = (array) $this->view->exposed_raw_input[$this->options['expose']['identifier']];
        }
        // If we're checking for EMPTY or NOT, we don't need any input, and we can
        // say that our input conditions are met by just having the right operator.
        if ($this->operator == 'empty' || $this->operator == 'not empty') {
            return TRUE;
        }
        // If it's non-required and there's no value don't bother filtering.
        if (!$this->options['expose']['required'] && empty($this->validated_exposed_input)) {
            return FALSE;
        }
        $rc = parent::acceptExposedInput($input);
        if ($rc) {
            // If we have previously validated input, override.
            if (isset($this->validated_exposed_input)) {
                $this->value = $this->validated_exposed_input;
            }
        }
        return $rc;
    }
    public function validateExposed(&$form, FormStateInterface $form_state) {
        if (empty($this->options['exposed'])) {
            return;
        }
        $identifier = $this->options['expose']['identifier'];
        $input = $form_state->getValue($identifier);
        if ($this->options['is_grouped'] && isset($this->options['group_info']['group_items'][$input])) {
            $this->validated_exposed_input = $this->options['group_info']['group_items'][$input]['value'];
            return;
        }
        // We only validate if they've chosen the text field style.
        if ($this->options['type'] != 'textfield') {
            if ($form_state->getValue($identifier) != 'All') {
                $this->validated_exposed_input = (array) $form_state->getValue($identifier);
            }
            return;
        }
        if (empty($this->options['expose']['identifier'])) {
            return;
        }
        if ($values = $form_state->getValue($identifier)) {
            foreach ($values as $value) {
                $this->validated_exposed_input[] = $value['target_id'];
            }
        }
    }
    protected function valueSubmit($form, FormStateInterface $form_state) {
        // prevent array_filter from messing up our arrays in parent submit.
    }
    public function buildExposeForm(&$form, FormStateInterface $form_state) {
        parent::buildExposeForm($form, $form_state);
        if ($this->options['type'] != 'select') {
            unset($form['expose']['reduce']);
        }
        $form['error_message'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Display error message'),
            '#default_value' => !empty($this->options['error_message']),
        ];
    }
    public function adminSummary() {
        // set up $this->valueOptions for the parent summary
        $this->valueOptions = [];
        if ($this->value) {
            $this->value = array_filter($this->value);
            $terms = Term::loadMultiple($this->value);
            foreach ($terms as $term) {
                $this->valueOptions[$term->id()] = \Drupal::service('entity.repository')->getTranslationFromContext($term)
                    ->label();
            }
        }
        return parent::adminSummary();
    }
    
    /**
     * {@inheritdoc}
     */
    public function calculateDependencies() {
        $dependencies = parent::calculateDependencies();
        $vocabulary = $this->vocabularyStorage
            ->load($this->options['vid']);
        $dependencies[$vocabulary->getConfigDependencyKey()][] = $vocabulary->getConfigDependencyName();
        foreach ($this->termStorage
            ->loadMultiple($this->options['value']) as $term) {
            $dependencies[$term->getConfigDependencyKey()][] = $term->getConfigDependencyName();
        }
        return $dependencies;
    }

}