BlockForm.php in Zircon Profile 8.0

Contains \Drupal\block\BlockForm.

Namespace

Drupal\block

File

core/modules/block/src/BlockForm.php

<?php

/**
 * @file
 * Contains \Drupal\block\BlockForm.
 */
namespace Drupal\block;

use Drupal\Component\Utility\Html;
use Drupal\Core\Entity\EntityForm;
use Drupal\Core\Entity\EntityManagerInterface;
use Drupal\Core\Executable\ExecutableManagerInterface;
use Drupal\Core\Extension\ThemeHandlerInterface;
use Drupal\Core\Form\FormState;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Language\LanguageManagerInterface;
use Drupal\Core\Plugin\ContextAwarePluginInterface;
use Drupal\Core\Plugin\Context\ContextRepositoryInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

/**
 * Provides form for block instance forms.
 */
class BlockForm extends EntityForm {

  /**
   * The block entity.
   *
   * @var \Drupal\block\BlockInterface
   */
  protected $entity;

  /**
   * The block storage.
   *
   * @var \Drupal\Core\Entity\EntityStorageInterface
   */
  protected $storage;

  /**
   * The condition plugin manager.
   *
   * @var \Drupal\Core\Condition\ConditionManager
   */
  protected $manager;

  /**
   * The event dispatcher service.
   *
   * @var \Symfony\Component\EventDispatcher\EventDispatcherInterface
   */
  protected $dispatcher;

  /**
   * The language manager service.
   *
   * @var \Drupal\Core\Language\LanguageManagerInterface
   */
  protected $language;

  /**
   * The theme handler.
   *
   * @var \Drupal\Core\Extension\ThemeHandler
   */
  protected $themeHandler;

  /**
   * The context repository service.
   *
   * @var \Drupal\Core\Plugin\Context\ContextRepositoryInterface
   */
  protected $contextRepository;

  /**
   * Constructs a BlockForm object.
   *
   * @param \Drupal\Core\Entity\EntityManagerInterface $entity_manager
   *   The entity manager.
   * @param \Drupal\Core\Executable\ExecutableManagerInterface $manager
   *   The ConditionManager for building the visibility UI.
   * @param \Drupal\Core\Plugin\Context\ContextRepositoryInterface $context_repository
   *   The lazy context repository service.
   * @param \Drupal\Core\Language\LanguageManagerInterface $language
   *   The language manager.
   * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
   * The theme handler.
   */
  public function __construct(EntityManagerInterface $entity_manager, ExecutableManagerInterface $manager, ContextRepositoryInterface $context_repository, LanguageManagerInterface $language, ThemeHandlerInterface $theme_handler) {
    $this->storage = $entity_manager
      ->getStorage('block');
    $this->manager = $manager;
    $this->contextRepository = $context_repository;
    $this->language = $language;
    $this->themeHandler = $theme_handler;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container) {
    return new static($container
      ->get('entity.manager'), $container
      ->get('plugin.manager.condition'), $container
      ->get('context.repository'), $container
      ->get('language_manager'), $container
      ->get('theme_handler'));
  }

  /**
   * {@inheritdoc}
   */
  public function form(array $form, FormStateInterface $form_state) {
    $entity = $this->entity;

    // Store theme settings in $form_state for use below.
    if (!($theme = $entity
      ->getTheme())) {
      $theme = $this
        ->config('system.theme')
        ->get('default');
    }
    $form_state
      ->set('block_theme', $theme);

    // Store the gathered contexts in the form state for other objects to use
    // during form building.
    $form_state
      ->setTemporaryValue('gathered_contexts', $this->contextRepository
      ->getAvailableContexts());
    $form['#tree'] = TRUE;
    $form['settings'] = $entity
      ->getPlugin()
      ->buildConfigurationForm(array(), $form_state);
    $form['visibility'] = $this
      ->buildVisibilityInterface([], $form_state);

    // If creating a new block, calculate a safe default machine name.
    $form['id'] = array(
      '#type' => 'machine_name',
      '#maxlength' => 64,
      '#description' => $this
        ->t('A unique name for this block instance. Must be alpha-numeric and underscore separated.'),
      '#default_value' => !$entity
        ->isNew() ? $entity
        ->id() : $this
        ->getUniqueMachineName($entity),
      '#machine_name' => array(
        'exists' => '\\Drupal\\block\\Entity\\Block::load',
        'replace_pattern' => '[^a-z0-9_.]+',
        'source' => array(
          'settings',
          'label',
        ),
      ),
      '#required' => TRUE,
      '#disabled' => !$entity
        ->isNew(),
    );

    // Theme settings.
    if ($entity
      ->getTheme()) {
      $form['theme'] = array(
        '#type' => 'value',
        '#value' => $theme,
      );
    }
    else {
      $theme_options = array();
      foreach ($this->themeHandler
        ->listInfo() as $theme_name => $theme_info) {
        if (!empty($theme_info->status)) {
          $theme_options[$theme_name] = $theme_info->info['name'];
        }
      }
      $form['theme'] = array(
        '#type' => 'select',
        '#options' => $theme_options,
        '#title' => t('Theme'),
        '#default_value' => $theme,
        '#ajax' => array(
          'callback' => '::themeSwitch',
          'wrapper' => 'edit-block-region-wrapper',
        ),
      );
    }

    // Region settings.
    $entity_region = $entity
      ->getRegion();
    $region = $entity
      ->isNew() ? $this
      ->getRequest()->query
      ->get('region', $entity_region) : $entity_region;
    $form['region'] = array(
      '#type' => 'select',
      '#title' => $this
        ->t('Region'),
      '#description' => $this
        ->t('Select the region where this block should be displayed.'),
      '#default_value' => $region,
      '#empty_value' => BlockInterface::BLOCK_REGION_NONE,
      '#options' => system_region_list($theme, REGIONS_VISIBLE),
      '#prefix' => '<div id="edit-block-region-wrapper">',
      '#suffix' => '</div>',
    );
    $form['#attached']['library'][] = 'block/drupal.block.admin';
    return $form;
  }

  /**
   * Handles switching the available regions based on the selected theme.
   */
  public function themeSwitch($form, FormStateInterface $form_state) {
    $form['region']['#options'] = system_region_list($form_state
      ->getValue('theme'), REGIONS_VISIBLE);
    return $form['region'];
  }

  /**
   * Helper function for building the visibility UI form.
   *
   * @param array $form
   *   An associative array containing the structure of the form.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current state of the form.
   *
   * @return array
   *   The form array with the visibility UI added in.
   */
  protected function buildVisibilityInterface(array $form, FormStateInterface $form_state) {
    $form['visibility_tabs'] = [
      '#type' => 'vertical_tabs',
      '#title' => $this
        ->t('Visibility'),
      '#parents' => [
        'visibility_tabs',
      ],
      '#attached' => [
        'library' => [
          'block/drupal.block',
        ],
      ],
    ];

    // @todo Allow list of conditions to be configured in
    //   https://www.drupal.org/node/2284687.
    $visibility = $this->entity
      ->getVisibility();
    foreach ($this->manager
      ->getDefinitions() as $condition_id => $definition) {

      // Don't display the current theme condition.
      if ($condition_id == 'current_theme') {
        continue;
      }

      // Don't display the language condition until we have multiple languages.
      if ($condition_id == 'language' && !$this->language
        ->isMultilingual()) {
        continue;
      }

      /** @var \Drupal\Core\Condition\ConditionInterface $condition */
      $condition = $this->manager
        ->createInstance($condition_id, isset($visibility[$condition_id]) ? $visibility[$condition_id] : []);
      $form_state
        ->set([
        'conditions',
        $condition_id,
      ], $condition);
      $condition_form = $condition
        ->buildConfigurationForm([], $form_state);
      $condition_form['#type'] = 'details';
      $condition_form['#title'] = $condition
        ->getPluginDefinition()['label'];
      $condition_form['#group'] = 'visibility_tabs';
      $form[$condition_id] = $condition_form;
    }
    if (isset($form['node_type'])) {
      $form['node_type']['#title'] = $this
        ->t('Content types');
      $form['node_type']['bundles']['#title'] = $this
        ->t('Content types');
      $form['node_type']['negate']['#type'] = 'value';
      $form['node_type']['negate']['#title_display'] = 'invisible';
      $form['node_type']['negate']['#value'] = $form['node_type']['negate']['#default_value'];
    }
    if (isset($form['user_role'])) {
      $form['user_role']['#title'] = $this
        ->t('Roles');
      unset($form['user_role']['roles']['#description']);
      $form['user_role']['negate']['#type'] = 'value';
      $form['user_role']['negate']['#value'] = $form['user_role']['negate']['#default_value'];
    }
    if (isset($form['request_path'])) {
      $form['request_path']['#title'] = $this
        ->t('Pages');
      $form['request_path']['negate']['#type'] = 'radios';
      $form['request_path']['negate']['#default_value'] = (int) $form['request_path']['negate']['#default_value'];
      $form['request_path']['negate']['#title_display'] = 'invisible';
      $form['request_path']['negate']['#options'] = [
        $this
          ->t('Show for the listed pages'),
        $this
          ->t('Hide for the listed pages'),
      ];
    }
    if (isset($form['language'])) {
      $form['language']['negate']['#type'] = 'value';
      $form['language']['negate']['#value'] = $form['language']['negate']['#default_value'];
    }
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  protected function actions(array $form, FormStateInterface $form_state) {
    $actions = parent::actions($form, $form_state);
    $actions['submit']['#value'] = $this
      ->t('Save block');
    return $actions;
  }

  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state) {
    parent::validateForm($form, $form_state);

    // The Block Entity form puts all block plugin form elements in the
    // settings form element, so just pass that to the block for validation.
    $settings = (new FormState())
      ->setValues($form_state
      ->getValue('settings'));

    // Call the plugin validate handler.
    $this->entity
      ->getPlugin()
      ->validateConfigurationForm($form, $settings);

    // Update the original form values.
    $form_state
      ->setValue('settings', $settings
      ->getValues());
    $this
      ->validateVisibility($form, $form_state);
  }

  /**
   * Helper function to independently validate the visibility UI.
   *
   * @param array $form
   *   A nested array form elements comprising the form.
   * @param \Drupal\Core\Form\FormStateInterface $form_state
   *   The current state of the form.
   */
  protected function validateVisibility(array $form, FormStateInterface $form_state) {

    // Validate visibility condition settings.
    foreach ($form_state
      ->getValue('visibility') as $condition_id => $values) {

      // All condition plugins use 'negate' as a Boolean in their schema.
      // However, certain form elements may return it as 0/1. Cast here to
      // ensure the data is in the expected type.
      if (array_key_exists('negate', $values)) {
        $values['negate'] = (bool) $values['negate'];
      }

      // Allow the condition to validate the form.
      $condition = $form_state
        ->get([
        'conditions',
        $condition_id,
      ]);
      $condition_values = (new FormState())
        ->setValues($values);
      $condition
        ->validateConfigurationForm($form, $condition_values);

      // Update the original form values.
      $form_state
        ->setValue([
        'visibility',
        $condition_id,
      ], $condition_values
        ->getValues());
    }
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    parent::submitForm($form, $form_state);
    $entity = $this->entity;

    // The Block Entity form puts all block plugin form elements in the
    // settings form element, so just pass that to the block for submission.
    // @todo Find a way to avoid this manipulation.
    $settings = (new FormState())
      ->setValues($form_state
      ->getValue('settings'));

    // Call the plugin submit handler.
    $entity
      ->getPlugin()
      ->submitConfigurationForm($form, $settings);
    $block = $entity
      ->getPlugin();

    // If this block is context-aware, set the context mapping.
    if ($block instanceof ContextAwarePluginInterface && $block
      ->getContextDefinitions()) {
      $context_mapping = $settings
        ->getValue('context_mapping', []);
      $block
        ->setContextMapping($context_mapping);
    }

    // Update the original form values.
    $form_state
      ->setValue('settings', $settings
      ->getValues());

    // Submit visibility condition settings.
    foreach ($form_state
      ->getValue('visibility') as $condition_id => $values) {

      // Allow the condition to submit the form.
      $condition = $form_state
        ->get([
        'conditions',
        $condition_id,
      ]);
      $condition_values = (new FormState())
        ->setValues($values);
      $condition
        ->submitConfigurationForm($form, $condition_values);
      if ($condition instanceof ContextAwarePluginInterface) {
        $context_mapping = isset($values['context_mapping']) ? $values['context_mapping'] : [];
        $condition
          ->setContextMapping($context_mapping);
      }

      // Update the original form values.
      $condition_configuration = $condition
        ->getConfiguration();
      $form_state
        ->setValue([
        'visibility',
        $condition_id,
      ], $condition_configuration);

      // Update the visibility conditions on the block.
      $entity
        ->getVisibilityConditions()
        ->addInstanceId($condition_id, $condition_configuration);
    }

    // Save the settings of the plugin.
    $entity
      ->save();
    drupal_set_message($this
      ->t('The block configuration has been saved.'));
    $form_state
      ->setRedirect('block.admin_display_theme', array(
      'theme' => $form_state
        ->getValue('theme'),
    ), array(
      'query' => array(
        'block-placement' => Html::getClass($this->entity
          ->id()),
      ),
    ));
  }

  /**
   * Generates a unique machine name for a block.
   *
   * @param \Drupal\block\BlockInterface $block
   *   The block entity.
   *
   * @return string
   *   Returns the unique name.
   */
  public function getUniqueMachineName(BlockInterface $block) {
    $suggestion = $block
      ->getPlugin()
      ->getMachineNameSuggestion();

    // Get all the blocks which starts with the suggested machine name.
    $query = $this->storage
      ->getQuery();
    $query
      ->condition('id', $suggestion, 'CONTAINS');
    $block_ids = $query
      ->execute();
    $block_ids = array_map(function ($block_id) {
      $parts = explode('.', $block_id);
      return end($parts);
    }, $block_ids);

    // Iterate through potential IDs until we get a new one. E.g.
    // 'plugin', 'plugin_2', 'plugin_3', etc.
    $count = 1;
    $machine_default = $suggestion;
    while (in_array($machine_default, $block_ids)) {
      $machine_default = $suggestion . '_' . ++$count;
    }
    return $machine_default;
  }

}

Classes

Name	Description
BlockForm	Provides form for block instance forms.