public function OverviewTerms::buildForm in Drupal 8

Same name and namespace in other branches
9 core/modules/taxonomy/src/Form/OverviewTerms.php \Drupal\taxonomy\Form\OverviewTerms::buildForm()
Form constructor.
Display a tree of all the terms in a vocabulary, with options to edit each one. The form is made drag and drop by the theme function.
Parameters

array $form: An associative array containing the structure of the form.
\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.
\Drupal\taxonomy\VocabularyInterface $taxonomy_vocabulary: The vocabulary to display the overview form for.
Return value

array The form structure.
Overrides FormInterface::buildForm
1 call to OverviewTerms::buildForm()
Overview::buildForm in core/modules/forum/src/Form/Overview.php: Form constructor.
1 method overrides OverviewTerms::buildForm()
Overview::buildForm in core/modules/forum/src/Form/Overview.php: Form constructor.
File

core/modules/taxonomy/src/Form/OverviewTerms.php, line 149
Class

OverviewTerms: Provides terms overview form for a taxonomy vocabulary.
Namespace

Drupal\taxonomy\Form
Code

public function buildForm(array $form, FormStateInterface $form_state, VocabularyInterface $taxonomy_vocabulary = NULL) {
  $form_state
    ->set([
    'taxonomy',
    'vocabulary',
  ], $taxonomy_vocabulary);
  $vocabulary_hierarchy = $this->storageController
    ->getVocabularyHierarchyType($taxonomy_vocabulary
    ->id());
  $parent_fields = FALSE;
  $page = $this
    ->getRequest()->query
    ->get('page') ?: 0;

  // Number of terms per page.
  $page_increment = $this
    ->config('taxonomy.settings')
    ->get('terms_per_page_admin');

  // Elements shown on this page.
  $page_entries = 0;

  // Elements at the root level before this page.
  $before_entries = 0;

  // Elements at the root level after this page.
  $after_entries = 0;

  // Elements at the root level on this page.
  $root_entries = 0;

  // Terms from previous and next pages are shown if the term tree would have
  // been cut in the middle. Keep track of how many extra terms we show on
  // each page of terms.
  $back_step = NULL;
  $forward_step = 0;

  // An array of the terms to be displayed on this page.
  $current_page = [];
  $delta = 0;
  $term_deltas = [];
  $tree = $this->storageController
    ->loadTree($taxonomy_vocabulary
    ->id(), 0, NULL, TRUE);
  $tree_index = 0;
  do {

    // In case this tree is completely empty.
    if (empty($tree[$tree_index])) {
      break;
    }
    $delta++;

    // Count entries before the current page.
    if ($page && $page * $page_increment > $before_entries && !isset($back_step)) {
      $before_entries++;
      continue;
    }
    elseif ($page_entries > $page_increment && isset($complete_tree)) {
      $after_entries++;
      continue;
    }

    // Do not let a term start the page that is not at the root.
    $term = $tree[$tree_index];
    if (isset($term->depth) && $term->depth > 0 && !isset($back_step)) {
      $back_step = 0;
      while ($pterm = $tree[--$tree_index]) {
        $before_entries--;
        $back_step++;
        if ($pterm->depth == 0) {
          $tree_index--;

          // Jump back to the start of the root level parent.
          continue 2;
        }
      }
    }
    $back_step = isset($back_step) ? $back_step : 0;

    // Continue rendering the tree until we reach the a new root item.
    if ($page_entries >= $page_increment + $back_step + 1 && $term->depth == 0 && $root_entries > 1) {
      $complete_tree = TRUE;

      // This new item at the root level is the first item on the next page.
      $after_entries++;
      continue;
    }
    if ($page_entries >= $page_increment + $back_step) {
      $forward_step++;
    }

    // Finally, if we've gotten down this far, we're rendering a term on this
    // page.
    $page_entries++;
    $term_deltas[$term
      ->id()] = isset($term_deltas[$term
      ->id()]) ? $term_deltas[$term
      ->id()] + 1 : 0;
    $key = 'tid:' . $term
      ->id() . ':' . $term_deltas[$term
      ->id()];

    // Keep track of the first term displayed on this page.
    if ($page_entries == 1) {
      $form['#first_tid'] = $term
        ->id();
    }

    // Keep a variable to make sure at least 2 root elements are displayed.
    if ($term->parents[0] == 0) {
      $root_entries++;
    }
    $current_page[$key] = $term;
  } while (isset($tree[++$tree_index]));

  // Because we didn't use a pager query, set the necessary pager variables.
  $total_entries = $before_entries + $page_entries + $after_entries;
  $this->pagerManager
    ->createPager($total_entries, $page_increment);

  // If this form was already submitted once, it's probably hit a validation
  // error. Ensure the form is rebuilt in the same order as the user
  // submitted.
  $user_input = $form_state
    ->getUserInput();
  if (!empty($user_input)) {

    // Get the POST order.
    $order = array_flip(array_keys($user_input['terms']));

    // Update our form with the new order.
    $current_page = array_merge($order, $current_page);
    foreach ($current_page as $key => $term) {

      // Verify this is a term for the current page and set at the current
      // depth.
      if (is_array($user_input['terms'][$key]) && is_numeric($user_input['terms'][$key]['term']['tid'])) {
        $current_page[$key]->depth = $user_input['terms'][$key]['term']['depth'];
      }
      else {
        unset($current_page[$key]);
      }
    }
  }
  $args = [
    '%capital_name' => Unicode::ucfirst($taxonomy_vocabulary
      ->label()),
    '%name' => $taxonomy_vocabulary
      ->label(),
  ];
  if ($this
    ->currentUser()
    ->hasPermission('administer taxonomy') || $this
    ->currentUser()
    ->hasPermission('edit terms in ' . $taxonomy_vocabulary
    ->id())) {
    switch ($vocabulary_hierarchy) {
      case VocabularyInterface::HIERARCHY_DISABLED:
        $help_message = $this
          ->t('You can reorganize the terms in %capital_name using their drag-and-drop handles, and group terms under a parent term by sliding them under and to the right of the parent.', $args);
        break;
      case VocabularyInterface::HIERARCHY_SINGLE:
        $help_message = $this
          ->t('%capital_name contains terms grouped under parent terms. You can reorganize the terms in %capital_name using their drag-and-drop handles.', $args);
        break;
      case VocabularyInterface::HIERARCHY_MULTIPLE:
        $help_message = $this
          ->t('%capital_name contains terms with multiple parents. Drag and drop of terms with multiple parents is not supported, but you can re-enable drag-and-drop support by editing each term to include only a single parent.', $args);
        break;
    }
  }
  else {
    switch ($vocabulary_hierarchy) {
      case VocabularyInterface::HIERARCHY_DISABLED:
        $help_message = $this
          ->t('%capital_name contains the following terms.', $args);
        break;
      case VocabularyInterface::HIERARCHY_SINGLE:
        $help_message = $this
          ->t('%capital_name contains terms grouped under parent terms', $args);
        break;
      case VocabularyInterface::HIERARCHY_MULTIPLE:
        $help_message = $this
          ->t('%capital_name contains terms with multiple parents.', $args);
        break;
    }
  }

  // Get the IDs of the terms edited on the current page which have pending
  // revisions.
  $edited_term_ids = array_map(function ($item) {
    return $item
      ->id();
  }, $current_page);
  $pending_term_ids = array_intersect($this->storageController
    ->getTermIdsWithPendingRevisions(), $edited_term_ids);
  if ($pending_term_ids) {
    $help_message = $this
      ->formatPlural(count($pending_term_ids), '%capital_name contains 1 term with pending revisions. Drag and drop of terms with pending revisions is not supported, but you can re-enable drag-and-drop support by getting each term to a published state.', '%capital_name contains @count terms with pending revisions. Drag and drop of terms with pending revisions is not supported, but you can re-enable drag-and-drop support by getting each term to a published state.', $args);
  }

  // Only allow access to change parents and reorder the tree if there are no
  // pending revisions and there are no terms with multiple parents.
  $update_tree_access = AccessResult::allowedIf(empty($pending_term_ids) && $vocabulary_hierarchy !== VocabularyInterface::HIERARCHY_MULTIPLE);
  $form['help'] = [
    '#type' => 'container',
    'message' => [
      '#markup' => $help_message,
    ],
  ];
  if (!$update_tree_access
    ->isAllowed()) {
    $form['help']['#attributes']['class'] = [
      'messages',
      'messages--warning',
    ];
  }
  $errors = $form_state
    ->getErrors();
  $row_position = 0;

  // Build the actual form.
  $access_control_handler = $this->entityTypeManager
    ->getAccessControlHandler('taxonomy_term');
  $create_access = $access_control_handler
    ->createAccess($taxonomy_vocabulary
    ->id(), NULL, [], TRUE);
  if ($create_access
    ->isAllowed()) {
    $empty = $this
      ->t('No terms available. <a href=":link">Add term</a>.', [
      ':link' => Url::fromRoute('entity.taxonomy_term.add_form', [
        'taxonomy_vocabulary' => $taxonomy_vocabulary
          ->id(),
      ])
        ->toString(),
    ]);
  }
  else {
    $empty = $this
      ->t('No terms available.');
  }
  $form['terms'] = [
    '#type' => 'table',
    '#empty' => $empty,
    '#header' => [
      'term' => $this
        ->t('Name'),
      'operations' => $this
        ->t('Operations'),
      'weight' => $update_tree_access
        ->isAllowed() ? $this
        ->t('Weight') : NULL,
    ],
    '#attributes' => [
      'id' => 'taxonomy',
    ],
  ];
  $this->renderer
    ->addCacheableDependency($form['terms'], $create_access);
  foreach ($current_page as $key => $term) {
    $form['terms'][$key] = [
      'term' => [],
      'operations' => [],
      'weight' => $update_tree_access
        ->isAllowed() ? [] : NULL,
    ];

    /** @var $term \Drupal\Core\Entity\EntityInterface */
    $term = $this->entityRepository
      ->getTranslationFromContext($term);
    $form['terms'][$key]['#term'] = $term;
    $indentation = [];
    if (isset($term->depth) && $term->depth > 0) {
      $indentation = [
        '#theme' => 'indentation',
        '#size' => $term->depth,
      ];
    }
    $form['terms'][$key]['term'] = [
      '#prefix' => !empty($indentation) ? $this->renderer
        ->render($indentation) : '',
      '#type' => 'link',
      '#title' => $term
        ->getName(),
      '#url' => $term
        ->toUrl(),
    ];

    // Add a special class for terms with pending revision so we can highlight
    // them in the form.
    $form['terms'][$key]['#attributes']['class'] = [];
    if (in_array($term
      ->id(), $pending_term_ids)) {
      $form['terms'][$key]['#attributes']['class'][] = 'color-warning';
      $form['terms'][$key]['#attributes']['class'][] = 'taxonomy-term--pending-revision';
    }
    if ($update_tree_access
      ->isAllowed() && count($tree) > 1) {
      $parent_fields = TRUE;
      $form['terms'][$key]['term']['tid'] = [
        '#type' => 'hidden',
        '#value' => $term
          ->id(),
        '#attributes' => [
          'class' => [
            'term-id',
          ],
        ],
      ];
      $form['terms'][$key]['term']['parent'] = [
        '#type' => 'hidden',
        // Yes, default_value on a hidden. It needs to be changeable by the
        // javascript.
        '#default_value' => $term->parents[0],
        '#attributes' => [
          'class' => [
            'term-parent',
          ],
        ],
      ];
      $form['terms'][$key]['term']['depth'] = [
        '#type' => 'hidden',
        // Same as above, the depth is modified by javascript, so it's a
        // default_value.
        '#default_value' => $term->depth,
        '#attributes' => [
          'class' => [
            'term-depth',
          ],
        ],
      ];
    }
    $update_access = $term
      ->access('update', NULL, TRUE);
    $update_tree_access = $update_tree_access
      ->andIf($update_access);
    if ($update_tree_access
      ->isAllowed()) {
      $form['terms'][$key]['weight'] = [
        '#type' => 'weight',
        '#delta' => $delta,
        '#title' => $this
          ->t('Weight for added term'),
        '#title_display' => 'invisible',
        '#default_value' => $term
          ->getWeight(),
        '#attributes' => [
          'class' => [
            'term-weight',
          ],
        ],
      ];
    }
    if ($operations = $this->termListBuilder
      ->getOperations($term)) {
      $form['terms'][$key]['operations'] = [
        '#type' => 'operations',
        '#links' => $operations,
      ];
    }
    if ($parent_fields) {
      $form['terms'][$key]['#attributes']['class'][] = 'draggable';
    }

    // Add classes that mark which terms belong to previous and next pages.
    if ($row_position < $back_step || $row_position >= $page_entries - $forward_step) {
      $form['terms'][$key]['#attributes']['class'][] = 'taxonomy-term-preview';
    }
    if ($row_position !== 0 && $row_position !== count($tree) - 1) {
      if ($row_position == $back_step - 1 || $row_position == $page_entries - $forward_step - 1) {
        $form['terms'][$key]['#attributes']['class'][] = 'taxonomy-term-divider-top';
      }
      elseif ($row_position == $back_step || $row_position == $page_entries - $forward_step) {
        $form['terms'][$key]['#attributes']['class'][] = 'taxonomy-term-divider-bottom';
      }
    }

    // Add an error class if this row contains a form error.
    foreach ($errors as $error_key => $error) {
      if (strpos($error_key, $key) === 0) {
        $form['terms'][$key]['#attributes']['class'][] = 'error';
      }
    }
    $row_position++;
  }
  $this->renderer
    ->addCacheableDependency($form['terms'], $update_tree_access);
  if ($update_tree_access
    ->isAllowed()) {
    if ($parent_fields) {
      $form['terms']['#tabledrag'][] = [
        'action' => 'match',
        'relationship' => 'parent',
        'group' => 'term-parent',
        'subgroup' => 'term-parent',
        'source' => 'term-id',
        'hidden' => FALSE,
      ];
      $form['terms']['#tabledrag'][] = [
        'action' => 'depth',
        'relationship' => 'group',
        'group' => 'term-depth',
        'hidden' => FALSE,
      ];
      $form['terms']['#attached']['library'][] = 'taxonomy/drupal.taxonomy';
      $form['terms']['#attached']['drupalSettings']['taxonomy'] = [
        'backStep' => $back_step,
        'forwardStep' => $forward_step,
      ];
    }
    $form['terms']['#tabledrag'][] = [
      'action' => 'order',
      'relationship' => 'sibling',
      'group' => 'term-weight',
    ];
  }
  if ($update_tree_access
    ->isAllowed() && count($tree) > 1) {
    $form['actions'] = [
      '#type' => 'actions',
      '#tree' => FALSE,
    ];
    $form['actions']['submit'] = [
      '#type' => 'submit',
      '#value' => $this
        ->t('Save'),
      '#button_type' => 'primary',
    ];
    $form['actions']['reset_alphabetical'] = [
      '#type' => 'submit',
      '#submit' => [
        '::submitReset',
      ],
      '#value' => $this
        ->t('Reset to alphabetical'),
    ];
  }
  $form['pager_pager'] = [
    '#type' => 'pager',
  ];
  return $form;
}
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