Club Drupal

<?php

/**

 * @file

 * Administrative page callbacks for the taxonomy module.

 */

/**

 * Form builder to list and manage vocabularies.

 *

 * @ingroup forms

 * @see taxonomy_overview_vocabularies_submit()

 * @see theme_taxonomy_overview_vocabularies()

 */

function taxonomy_overview_vocabularies($form) {

  $vocabularies = taxonomy_get_vocabularies();

  $form['#tree'] = TRUE;

  foreach ($vocabularies as $vocabulary) {

    $form[$vocabulary->vid]['#vocabulary'] = $vocabulary;

    $form[$vocabulary->vid]['name'] = array('#markup' => check_plain($vocabulary->name));

    $form[$vocabulary->vid]['weight'] = array(

      '#type' => 'weight',

      '#title' => t('Weight for @title', array('@title' => $vocabulary->name)),

      '#title_display' => 'invisible',

      '#delta' => 10,

      '#default_value' => $vocabulary->weight,

    );

    $form[$vocabulary->vid]['edit'] = array('#type' => 'link', '#title' => t('edit vocabulary'), '#href' => "admin/structure/taxonomy/$vocabulary->machine_name/edit");

    $form[$vocabulary->vid]['list'] = array('#type' => 'link', '#title' => t('list terms'), '#href' => "admin/structure/taxonomy/$vocabulary->machine_name");

    $form[$vocabulary->vid]['add'] = array('#type' => 'link', '#title' => t('add terms'), '#href' => "admin/structure/taxonomy/$vocabulary->machine_name/add");

  }

  // Only make this form include a submit button and weight if more than one

  // vocabulary exists.

  if (count($vocabularies) > 1) {

    $form['actions'] = array('#type' => 'actions');

    $form['actions']['submit'] = array('#type' => 'submit', '#value' => t('Save'));

  }

  elseif (isset($vocabulary)) {

    unset($form[$vocabulary->vid]['weight']);

  }

  return $form;

}

/**

 * Submit handler for vocabularies overview. Updates changed vocabulary weights.

 *

 * @see taxonomy_overview_vocabularies()

 */

function taxonomy_overview_vocabularies_submit($form, &$form_state) {

  foreach ($form_state['values'] as $vid => $vocabulary) {

    if (is_numeric($vid) && $form[$vid]['#vocabulary']->weight != $form_state['values'][$vid]['weight']) {

      $form[$vid]['#vocabulary']->weight = $form_state['values'][$vid]['weight'];

      taxonomy_vocabulary_save($form[$vid]['#vocabulary']);

    }

  }

  drupal_set_message(t('The configuration options have been saved.'));

}

/**

 * Returns HTML for the vocabulary overview form as a sortable list of vocabularies.

 *

 * @param $variables

 *   An associative array containing:

 *   - form: A render element representing the form.

 *

 * @see taxonomy_overview_vocabularies()

 * @ingroup themeable

 */

function theme_taxonomy_overview_vocabularies($variables) {

  $form = $variables['form'];

  $rows = array();

  foreach (element_children($form) as $key) {

    if (isset($form[$key]['name'])) {

      $vocabulary = &$form[$key];

      $row = array();

      $row[] = drupal_render($vocabulary['name']);

      if (isset($vocabulary['weight'])) {

        $vocabulary['weight']['#attributes']['class'] = array('vocabulary-weight');

        $row[] = drupal_render($vocabulary['weight']);

      }

      $row[] = drupal_render($vocabulary['edit']);

      $row[] = drupal_render($vocabulary['list']);

      $row[] = drupal_render($vocabulary['add']);

      $rows[] = array('data' => $row, 'class' => array('draggable'));

    }

  }

  $header = array(t('Vocabulary name'));

  if (isset($form['actions'])) {

    $header[] = t('Weight');

    drupal_add_tabledrag('taxonomy', 'order', 'sibling', 'vocabulary-weight');

  }

  $header[] = array('data' => t('Operations'), 'colspan' => '3');

  return theme('table', array('header' => $header, 'rows' => $rows, 'empty' => t('No vocabularies available. <a href="@link">Add vocabulary</a>.', array('@link' => url('admin/structure/taxonomy/add'))), 'attributes' => array('id' => 'taxonomy'))) . drupal_render_children($form);

}

/**

 * Form builder for the vocabulary editing form.

 *

 * @ingroup forms

 * @see taxonomy_form_vocabulary_submit()

 * @see taxonomy_form_vocabulary_validate()

 */

function taxonomy_form_vocabulary($form, &$form_state, $edit = array()) {

  // During initial form build, add the entity to the form state for use

  // during form building and processing. During a rebuild, use what is in the

  // form state.

  if (!isset($form_state['vocabulary'])) {

    $vocabulary = is_object($edit) ? $edit : (object) $edit;

    $defaults = array(

      'name' => '',

      'machine_name' => '',

      'description' => '',

      'hierarchy' => 0,

      'weight' => 0,

    );

    foreach ($defaults as $key => $value) {

      if (!isset($vocabulary->$key)) {

        $vocabulary->$key = $value;

      }

    }

    $form_state['vocabulary'] = $vocabulary;

  }

  else {

    $vocabulary = $form_state['vocabulary'];

  }

  // @todo Legacy support. Modules are encouraged to access the entity using

  //   $form_state. Remove in Drupal 8.

  $form['#vocabulary'] = $form_state['vocabulary'];

  // Check whether we need a deletion confirmation form.

  if (isset($form_state['confirm_delete']) && isset($form_state['values']['vid'])) {

    return taxonomy_vocabulary_confirm_delete($form, $form_state, $form_state['values']['vid']);

  }

  $form['name'] = array(

    '#type' => 'textfield',

    '#title' => t('Name'),

    '#default_value' => $vocabulary->name,

    '#maxlength' => 255,

    '#required' => TRUE,

  );

  $form['machine_name'] = array(

    '#type' => 'machine_name',

    '#default_value' => $vocabulary->machine_name,

    '#maxlength' => 255,

    '#machine_name' => array(

      'exists' => 'taxonomy_vocabulary_machine_name_load',

    ),

  );

  $form['old_machine_name'] = array(

    '#type' => 'value',

    '#value' => $vocabulary->machine_name,

  );

  $form['description'] = array(

    '#type' => 'textfield',

    '#title' => t('Description'),

    '#default_value' => $vocabulary->description,

  );

  // Set the hierarchy to "multiple parents" by default. This simplifies the

  // vocabulary form and standardizes the term form.

  $form['hierarchy'] = array(

    '#type' => 'value',

    '#value' => '0',

  );

  $form['actions'] = array('#type' => 'actions');

  $form['actions']['submit'] = array('#type' => 'submit', '#value' => t('Save'));

  if (isset($vocabulary->vid)) {

    $form['actions']['delete'] = array('#type' => 'submit', '#value' => t('Delete'));

    $form['vid'] = array('#type' => 'value', '#value' => $vocabulary->vid);

    $form['module'] = array('#type' => 'value', '#value' => $vocabulary->module);

  }

  $form['#validate'][] = 'taxonomy_form_vocabulary_validate';

  return $form;

}

/**

 * Form validation handler for taxonomy_form_vocabulary().

 *

 * Makes sure that the machine name of the vocabulary is not in the

 * disallowed list (names that conflict with menu items, such as 'list'

 * and 'add').

 *

 * @see taxonomy_form_vocabulary()

 * @see taxonomy_form_vocabulary_submit()

 */

function taxonomy_form_vocabulary_validate($form, &$form_state) {

  // During the deletion there is no 'machine_name' key

  if (isset($form_state['values']['machine_name'])) {

    // Do not allow machine names to conflict with taxonomy path arguments.

    $machine_name = $form_state['values']['machine_name'];

    $disallowed = array('add', 'list');

    if (in_array($machine_name, $disallowed)) {

      form_set_error('machine_name', t('The machine-readable name cannot be "add" or "list".'));

    }

  }

}

/**

 * Form submission handler for taxonomy_form_vocabulary().

 *

 * @see taxonomy_form_vocabulary()

 * @see taxonomy_form_vocabulary_validate()

 */

function taxonomy_form_vocabulary_submit($form, &$form_state) {

  if ($form_state['triggering_element']['#value'] == t('Delete')) {

    // Rebuild the form to confirm vocabulary deletion.

    $form_state['rebuild'] = TRUE;

    $form_state['confirm_delete'] = TRUE;

    return;

  }

  $vocabulary = $form_state['vocabulary'];

  entity_form_submit_build_entity('taxonomy_vocabulary', $vocabulary, $form, $form_state);

  switch (taxonomy_vocabulary_save($vocabulary)) {

    case SAVED_NEW:

      drupal_set_message(t('Created new vocabulary %name.', array('%name' => $vocabulary->name)));

      watchdog('taxonomy', 'Created new vocabulary %name.', array('%name' => $vocabulary->name), WATCHDOG_NOTICE, l(t('edit'), 'admin/structure/taxonomy/' . $vocabulary->machine_name . '/edit'));

      break;

    case SAVED_UPDATED:

      drupal_set_message(t('Updated vocabulary %name.', array('%name' => $vocabulary->name)));

      watchdog('taxonomy', 'Updated vocabulary %name.', array('%name' => $vocabulary->name), WATCHDOG_NOTICE, l(t('edit'), 'admin/structure/taxonomy/' . $vocabulary->machine_name . '/edit'));

      break;

  }

  $form_state['values']['vid'] = $vocabulary->vid;

  $form_state['vid'] = $vocabulary->vid;

  $form_state['redirect'] = 'admin/structure/taxonomy';

}

/**

 * Form builder for the taxonomy terms overview.

 *

 * 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.

 *

 * @ingroup forms

 * @see taxonomy_overview_terms_submit()

 * @see theme_taxonomy_overview_terms()

 */

function taxonomy_overview_terms($form, &$form_state, $vocabulary) {

  global $pager_page_array, $pager_total, $pager_total_items;

  // Check for confirmation forms.

  if (isset($form_state['confirm_reset_alphabetical'])) {

    return taxonomy_vocabulary_confirm_reset_alphabetical($form, $form_state, $vocabulary->vid);

  }

  $form['#vocabulary'] = $vocabulary;

  $form['#tree'] = TRUE;

  $form['#parent_fields'] = FALSE;

  $page            = isset($_GET['page']) ? $_GET['page'] : 0;

  $page_increment  = variable_get('taxonomy_terms_per_page_admin', 100);  // Number of terms per page.

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

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

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

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

  // 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 = array();

  $delta = 0;

  $term_deltas = array();

  $tree = taxonomy_get_tree($vocabulary->vid);

  $term = current($tree);

  do {

    // In case this tree is completely empty.

    if (empty($term)) {

      break;

    }

    $delta++;

    // Count entries before the current page.

    if ($page && ($page * $page_increment) > $before_entries && !isset($back_step)) {

      $before_entries++;

      continue;

    }

    // Count entries after the current page.

    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.

    if (isset($term->depth) && ($term->depth > 0) && !isset($back_step)) {

      $back_step = 0;

      while ($pterm = prev($tree)) {

        $before_entries--;

        $back_step++;

        if ($pterm->depth == 0) {

          prev($tree);

          continue 2; // Jump back to the start of the root level parent.

       }

      }

    }

    $back_step = isset($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->tid] = isset($term_deltas[$term->tid]) ? $term_deltas[$term->tid] + 1 : 0;

    $key = 'tid:' . $term->tid . ':' . $term_deltas[$term->tid];

    // Keep track of the first term displayed on this page.

    if ($page_entries == 1) {

      $form['#first_tid'] = $term->tid;

    }

    // 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 ($term = next($tree));

  // Because we didn't use a pager query, set the necessary pager variables.

  $total_entries = $before_entries + $page_entries + $after_entries;

  $pager_total_items[0] = $total_entries;

  $pager_page_array[0] = $page;

  $pager_total[0] = ceil($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.

  if (!empty($form_state['input'])) {

    $order = array_flip(array_keys($form_state['input'])); // Get the $_POST order.

    $current_page = array_merge($order, $current_page); // Update our form with the new order.

    foreach ($current_page as $key => $term) {

      // Verify this is a term for the current page and set at the current depth.

      if (is_array($form_state['input'][$key]) && is_numeric($form_state['input'][$key]['tid'])) {

        $current_page[$key]->depth = $form_state['input'][$key]['depth'];

      }

      else {

        unset($current_page[$key]);

      }

    }

  }

  // Build the actual form.

  foreach ($current_page as $key => $term) {

    // Save the term for the current page so we don't have to load it a second time.

    $form[$key]['#term'] = (array) $term;

    if (isset($term->parents)) {

      $form[$key]['#term']['parent'] = $term->parent = $term->parents[0];

      unset($form[$key]['#term']['parents'], $term->parents);

    }

    $form[$key]['view'] = array('#type' => 'link', '#title' => $term->name, '#href' => "taxonomy/term/$term->tid");

    if ($vocabulary->hierarchy < 2 && count($tree) > 1) {

      $form['#parent_fields'] = TRUE;

      $form[$key]['tid'] = array(

        '#type' => 'hidden',

        '#value' => $term->tid

      );

      $form[$key]['parent'] = array(

        '#type' => 'hidden',

        // Yes, default_value on a hidden. It needs to be changeable by the javascript.

        '#default_value' => $term->parent,

      );

      $form[$key]['depth'] = array(

        '#type' => 'hidden',

        // Same as above, the depth is modified by javascript, so it's a default_value.

        '#default_value' => $term->depth,

      );

      $form[$key]['weight'] = array(

        '#type' => 'weight',

        '#delta' => $delta,

        '#title_display' => 'invisible',

        '#title' => t('Weight for added term'),

        '#default_value' => $term->weight,

      );

    }

    $form[$key]['edit'] = array('#type' => 'link', '#title' => t('edit'), '#href' => 'taxonomy/term/' . $term->tid . '/edit', '#options' => array('query' => drupal_get_destination()));

  }

  $form['#total_entries'] = $total_entries;

  $form['#page_increment'] = $page_increment;

  $form['#page_entries'] = $page_entries;

  $form['#back_step'] = $back_step;

  $form['#forward_step'] = $forward_step;

  $form['#empty_text'] = t('No terms available. <a href="@link">Add term</a>.', array('@link' => url('admin/structure/taxonomy/' . $vocabulary->machine_name . '/add')));

  if ($vocabulary->hierarchy < 2 && count($tree) > 1) {

    $form['actions'] = array('#type' => 'actions', '#tree' => FALSE);

    $form['actions']['submit'] = array(

      '#type' => 'submit',

      '#value' => t('Save')

    );

    $form['actions']['reset_alphabetical'] = array(

      '#type' => 'submit',

      '#value' => t('Reset to alphabetical')

    );

    $form_state['redirect'] = array($_GET['q'], (isset($_GET['page']) ? array('query' => array('page' => $_GET['page'])) : array()));

  }

  return $form;

}

/**

 * Submit handler for terms overview form.

 *

 * Rather than using a textfield or weight field, this form depends entirely

 * upon the order of form elements on the page to determine new weights.

 *

 * Because there might be hundreds or thousands of taxonomy terms that need to

 * be ordered, terms are weighted from 0 to the number of terms in the

 * vocabulary, rather than the standard -10 to 10 scale. Numbers are sorted

 * lowest to highest, but are not necessarily sequential. Numbers may be skipped

 * when a term has children so that reordering is minimal when a child is

 * added or removed from a term.

 *

 * @see taxonomy_overview_terms()

 */

function taxonomy_overview_terms_submit($form, &$form_state) {

  if ($form_state['triggering_element']['#value'] == t('Reset to alphabetical')) {

    // Execute the reset action.

    if ($form_state['values']['reset_alphabetical'] === TRUE) {

      return taxonomy_vocabulary_confirm_reset_alphabetical_submit($form, $form_state);

    }

    // Rebuild the form to confirm the reset action.

    $form_state['rebuild'] = TRUE;

    $form_state['confirm_reset_alphabetical'] = TRUE;

    return;

  }

  // Sort term order based on weight.

  uasort($form_state['values'], 'drupal_sort_weight');

  $vocabulary = $form['#vocabulary'];

  $hierarchy = 0; // Update the current hierarchy type as we go.

  $changed_terms = array();

  $tree = taxonomy_get_tree($vocabulary->vid);

  if (empty($tree)) {

    return;

  }

  // Build a list of all terms that need to be updated on previous pages.

  $weight = 0;

  $term = (array) $tree[0];

  while ($term['tid'] != $form['#first_tid']) {

    if ($term['parents'][0] == 0 && $term['weight'] != $weight) {

      $term['parent'] = $term['parents'][0];

      $term['weight'] = $weight;

      $changed_terms[$term['tid']] = $term;

    }

    $weight++;

    $hierarchy = $term['parents'][0] != 0 ? 1 : $hierarchy;

    $term = (array) $tree[$weight];

  }

  // Renumber the current page weights and assign any new parents.

  $level_weights = array();

  foreach ($form_state['values'] as $tid => $values) {

    if (isset($form[$tid]['#term'])) {

      $term = $form[$tid]['#term'];

      // Give terms at the root level a weight in sequence with terms on previous pages.

      if ($values['parent'] == 0 && $term['weight'] != $weight) {

        $term['weight'] = $weight;

        $changed_terms[$term['tid']] = $term;

      }

      // Terms not at the root level can safely start from 0 because they're all on this page.

      elseif ($values['parent'] > 0) {

        $level_weights[$values['parent']] = isset($level_weights[$values['parent']]) ? $level_weights[$values['parent']] + 1 : 0;

        if ($level_weights[$values['parent']] != $term['weight']) {

          $term['weight'] = $level_weights[$values['parent']];

          $changed_terms[$term['tid']] = $term;

        }

      }

      // Update any changed parents.

      if ($values['parent'] != $term['parent']) {

        $term['parent'] = $values['parent'];

        $changed_terms[$term['tid']] = $term;

      }

      $hierarchy = $term['parent'] != 0 ? 1 : $hierarchy;

      $weight++;

    }

  }

  // Build a list of all terms that need to be updated on following pages.

  for ($weight; $weight < count($tree); $weight++) {

    $term = (array) $tree[$weight];

    if ($term['parents'][0] == 0 && $term['weight'] != $weight) {

      $term['parent'] = $term['parents'][0];

      $term['weight'] = $weight;

      $changed_terms[$term['tid']] = $term;

    }

    $hierarchy = $term['parents'][0] != 0 ? 1 : $hierarchy;

  }

  // Save all updated terms.

  foreach ($changed_terms as $changed) {

    $term = (object) $changed;

    // Update term_hierachy and term_data directly since we don't have a

    // fully populated term object to save.

    db_update('taxonomy_term_hierarchy')

      ->fields(array('parent' => $term->parent))

      ->condition('tid', $term->tid, '=')

      ->execute();

    db_update('taxonomy_term_data')

      ->fields(array('weight' => $term->weight))

      ->condition('tid', $term->tid, '=')

      ->execute();

  }

  // Update the vocabulary hierarchy to flat or single hierarchy.

  if ($vocabulary->hierarchy != $hierarchy) {

    $vocabulary->hierarchy = $hierarchy;

    taxonomy_vocabulary_save($vocabulary);

  }

  drupal_set_message(t('The configuration options have been saved.'));

}

/**

 * Returns HTML for a terms overview form as a sortable list of terms.

 *

 * @param $variables

 *   An associative array containing:

 *   - form: A render element representing the form.

 *

 * @see taxonomy_overview_terms()

 * @ingroup themeable

 */

function theme_taxonomy_overview_terms($variables) {

  $form = $variables['form'];

  $page_increment  = $form['#page_increment'];

  $page_entries    = $form['#page_entries'];

  $back_step     = $form['#back_step'];

  $forward_step  = $form['#forward_step'];

  // Add drag and drop if parent fields are present in the form.

  if ($form['#parent_fields']) {

    drupal_add_tabledrag('taxonomy', 'match', 'parent', 'term-parent', 'term-parent', 'term-id', FALSE);

    drupal_add_tabledrag('taxonomy', 'depth', 'group', 'term-depth', NULL, NULL, FALSE);

    drupal_add_js(drupal_get_path('module', 'taxonomy') . '/taxonomy.js');

    drupal_add_js(array('taxonomy' => array('backStep' => $back_step, 'forwardStep' => $forward_step)), 'setting');

    drupal_add_css(drupal_get_path('module', 'taxonomy') . '/taxonomy.css');

  }

  drupal_add_tabledrag('taxonomy', 'order', 'sibling', 'term-weight');

  $errors = form_get_errors() != FALSE ? form_get_errors() : array();

  $rows = array();

  foreach (element_children($form) as $key) {

    if (isset($form[$key]['#term'])) {

      $term = &$form[$key];

      $row = array();

      $row[] = (isset($term['#term']['depth']) && $term['#term']['depth'] > 0 ? theme('indentation', array('size' => $term['#term']['depth'])) : ''). drupal_render($term['view']);

      if ($form['#parent_fields']) {

        $term['tid']['#attributes']['class'] = array('term-id');

        $term['parent']['#attributes']['class'] = array('term-parent');

        $term['depth']['#attributes']['class'] = array('term-depth');

        $row[0] .= drupal_render($term['parent']) . drupal_render($term['tid']) . drupal_render($term['depth']);

      }

      $term['weight']['#attributes']['class'] = array('term-weight');

      $row[] = drupal_render($term['weight']);

      $row[] = drupal_render($term['edit']);

      $row = array('data' => $row);

      $rows[$key] = $row;

    }

  }

  // Add necessary classes to rows.

  $row_position = 0;

  foreach ($rows as $key => $row) {

    $rows[$key]['class'] = array();

    if (isset($form['#parent_fields'])) {

      $rows[$key]['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) {

      $rows[$key]['class'][] = 'taxonomy-term-preview';

    }

    if ($row_position !== 0 && $row_position !== count($rows) - 1) {

      if ($row_position == $back_step - 1 || $row_position == $page_entries - $forward_step - 1) {

        $rows[$key]['class'][] = 'taxonomy-term-divider-top';

      }

      elseif ($row_position == $back_step || $row_position == $page_entries - $forward_step) {

        $rows[$key]['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) {

        $rows[$key]['class'][] = 'error';

      }

    }

    $row_position++;

  }

  if (empty($rows)) {

    $rows[] = array(array('data' => $form['#empty_text'], 'colspan' => '3'));

  }

  $header = array(t('Name'), t('Weight'), t('Operations'));

  $output = theme('table', array('header' => $header, 'rows' => $rows, 'attributes' => array('id' => 'taxonomy')));

  $output .= drupal_render_children($form);

  $output .= theme('pager');

  return $output;

}

/**

 * Form function for the term edit form.

 *

 * @ingroup forms

 * @see taxonomy_form_term_submit()

 */

function taxonomy_form_term($form, &$form_state, $edit = array(), $vocabulary = NULL) {

  // During initial form build, add the term entity to the form state for use

  // during form building and processing. During a rebuild, use what is in the

  // form state.

  if (!isset($form_state['term'])) {

    $term = is_object($edit) ? $edit : (object) $edit;

    if (!isset($vocabulary) && isset($term->vid)) {

      $vocabulary = taxonomy_vocabulary_load($term->vid);

    }

    $defaults = array(

      'name' => '',

      'description' => '',

      'format' => NULL,

      'vocabulary_machine_name' => isset($vocabulary) ? $vocabulary->machine_name : NULL,

      'tid' => NULL,

      'weight' => 0,

    );

    foreach ($defaults as $key => $value) {

      if (!isset($term->$key)) {

        $term->$key = $value;

      }

    }

    $form_state['term'] = $term;

  }

  else {

    $term = $form_state['term'];

    if (!isset($vocabulary) && isset($term->vid)) {

      $vocabulary = taxonomy_vocabulary_load($term->vid);

    }

  }

  $parent = array_keys(taxonomy_get_parents($term->tid));

  $form['#term'] = (array) $term;

  $form['#term']['parent'] = $parent;

  $form['#vocabulary'] = $vocabulary;

  // Check for confirmation forms.

  if (isset($form_state['confirm_delete'])) {

    return array_merge($form, taxonomy_term_confirm_delete($form, $form_state, $term->tid));

  }

  $form['name'] = array(

    '#type' => 'textfield',

    '#title' => t('Name'),

    '#default_value' => $term->name,

    '#maxlength' => 255,

    '#required' => TRUE,

    '#weight' => -5,

  );

  $form['description'] = array(

    '#type' => 'text_format',

    '#title' => t('Description'),

    '#default_value' => $term->description,

    '#format' => $term->format,

    '#weight' => 0,

  );

  $form['vocabulary_machine_name'] = array(

    '#type' => 'value',

    '#value' => isset($term->vocabulary_machine_name) ? $term->vocabulary_machine_name : $vocabulary->name,

  );

  $langcode = entity_language('taxonomy_term', $term);

  field_attach_form('taxonomy_term', $term, $form, $form_state, $langcode);

  $form['relations'] = array(

    '#type' => 'fieldset',

    '#title' => t('Relations'),

    '#collapsible' => TRUE,

    '#collapsed' => $vocabulary->hierarchy < 2,

    '#weight' => 10,

  );

  // taxonomy_get_tree and taxonomy_get_parents may contain large numbers of

  // items so we check for taxonomy_override_selector before loading the

  // full vocabulary. Contrib modules can then intercept before

  // hook_form_alter to provide scalable alternatives.

  if (!variable_get('taxonomy_override_selector', FALSE)) {

    $parent = array_keys(taxonomy_get_parents($term->tid));

    $children = taxonomy_get_tree($vocabulary->vid, $term->tid);

    // A term can't be the child of itself, nor of its children.

    foreach ($children as $child) {

      $exclude[] = $child->tid;

    }

    $exclude[] = $term->tid;

    $tree = taxonomy_get_tree($vocabulary->vid);

    $options = array('<' . t('root') . '>');

    if (empty($parent)) {

      $parent = array(0);

    }

    foreach ($tree as $item) {

      if (!in_array($item->tid, $exclude)) {

        $options[$item->tid] = str_repeat('-', $item->depth) . $item->name;

      }

    }

    $form['relations']['parent'] = array(

      '#type' => 'select',

      '#title' => t('Parent terms'),

      '#options' => $options,

      '#default_value' => $parent,

      '#multiple' => TRUE,

    );

  }

  $form['relations']['weight'] = array(

    '#type' => 'textfield',

    '#title' => t('Weight'),

    '#size' => 6,

    '#default_value' => $term->weight,

    '#description' => t('Terms are displayed in ascending order by weight.'),

    '#required' => TRUE,

  );

  $form['vid'] = array(

    '#type' => 'value',

    '#value' => $vocabulary->vid,

  );

  $form['tid'] = array(

    '#type' => 'value',

    '#value' => $term->tid,

  );

  $form['actions'] = array('#type' => 'actions');

  $form['actions']['submit'] = array(

    '#type' => 'submit',

    '#value' => t('Save'),

    '#weight' => 5,

  );

  if ($term->tid) {

    $form['actions']['delete'] = array(

      '#type' => 'submit',

      '#value' => t('Delete'),

      '#access' => user_access("delete terms in $vocabulary->vid") || user_access('administer taxonomy'),

      '#weight' => 10,

    );

  }

  else {

    $form_state['redirect'] = $_GET['q'];

  }

  return $form;

}

/**

 * Validation handler for the term form.

 *

 * @see taxonomy_form_term()

 */

function taxonomy_form_term_validate($form, &$form_state) {

  entity_form_field_validate('taxonomy_term', $form, $form_state);

  // Ensure numeric values.

  if (isset($form_state['values']['weight']) && !is_numeric($form_state['values']['weight'])) {

    form_set_error('weight', t('Weight value must be numeric.'));

  }

}

/**

 * Submit handler to insert or update a term.

 *

 * @see taxonomy_form_term()

 */

function taxonomy_form_term_submit($form, &$form_state) {

  if ($form_state['triggering_element']['#value'] == t('Delete')) {

    // Execute the term deletion.

    if ($form_state['values']['delete'] === TRUE) {

      return taxonomy_term_confirm_delete_submit($form, $form_state);

    }

    // Rebuild the form to confirm term deletion.

    $form_state['rebuild'] = TRUE;

    $form_state['confirm_delete'] = TRUE;

    return;

  }

  $term = taxonomy_form_term_submit_build_taxonomy_term($form, $form_state);

  $status = taxonomy_term_save($term);

  switch ($status) {

    case SAVED_NEW:

      drupal_set_message(t('Created new term %term.', array('%term' => $term->name)));

      watchdog('taxonomy', 'Created new term %term.', array('%term' => $term->name), WATCHDOG_NOTICE, l(t('edit'), 'taxonomy/term/' . $term->tid . '/edit'));

      break;

    case SAVED_UPDATED:

      drupal_set_message(t('Updated term %term.', array('%term' => $term->name)));

      watchdog('taxonomy', 'Updated term %term.', array('%term' => $term->name), WATCHDOG_NOTICE, l(t('edit'), 'taxonomy/term/' . $term->tid . '/edit'));

      // Clear the page and block caches to avoid stale data.

      cache_clear_all();

      break;

  }

  $current_parent_count = count($form_state['values']['parent']);

  $previous_parent_count = count($form['#term']['parent']);

  // Root doesn't count if it's the only parent.

  if ($current_parent_count == 1 && isset($form_state['values']['parent'][0])) {

    $current_parent_count = 0;

    $form_state['values']['parent'] = array();

  }

  // If the number of parents has been reduced to one or none, do a check on the

  // parents of every term in the vocabulary value.

  if ($current_parent_count < $previous_parent_count && $current_parent_count < 2) {

    taxonomy_check_vocabulary_hierarchy($form['#vocabulary'], $form_state['values']);

  }

  // If we've increased the number of parents and this is a single or flat

  // hierarchy, update the vocabulary immediately.

  elseif ($current_parent_count > $previous_parent_count && $form['#vocabulary']->hierarchy < 2) {

    $form['#vocabulary']->hierarchy = $current_parent_count == 1 ? 1 : 2;

    taxonomy_vocabulary_save($form['#vocabulary']);

  }

  $form_state['values']['tid'] = $term->tid;

  $form_state['tid'] = $term->tid;

}

/**

 * Updates the form state's term entity by processing this submission's values.

 */

function taxonomy_form_term_submit_build_taxonomy_term($form, &$form_state) {

  $term = $form_state['term'];

  entity_form_submit_build_entity('taxonomy_term', $term, $form, $form_state);

  // Convert text_format field into values expected by taxonomy_term_save().

  $description = $form_state['values']['description'];

  $term->description = $description['value'];

  $term->format = $description['format'];

  return $term;

}

/**

 * Form builder for the term delete form.

 *

 * @ingroup forms

 * @see taxonomy_term_confirm_delete_submit()

 */

function taxonomy_term_confirm_delete($form, &$form_state, $tid) {

  $term = taxonomy_term_load($tid);

  // Always provide entity id in the same form key as in the entity edit form.

  $form['tid'] = array('#type' => 'value', '#value' => $tid);

  $form['#term'] = $term;

  $form['type'] = array('#type' => 'value', '#value' => 'term');

  $form['name'] = array('#type' => 'value', '#value' => $term->name);

  $form['vocabulary_machine_name'] = array('#type' => 'value', '#value' => $term->vocabulary_machine_name);

  $form['delete'] = array('#type' => 'value', '#value' => TRUE);

  return confirm_form($form,

    t('Are you sure you want to delete the term %title?',

    array('%title' => $term->name)),

    'admin/structure/taxonomy',

    t('Deleting a term will delete all its children if there are any. This action cannot be undone.'),

    t('Delete'),

    t('Cancel'));

}

/**

 * Submit handler to delete a term after confirmation.

 *

 * @see taxonomy_term_confirm_delete()

 */

function taxonomy_term_confirm_delete_submit($form, &$form_state) {

  taxonomy_term_delete($form_state['values']['tid']);

  taxonomy_check_vocabulary_hierarchy($form['#vocabulary'], $form_state['values']);

  drupal_set_message(t('Deleted term %name.', array('%name' => $form_state['values']['name'])));

  watchdog('taxonomy', 'Deleted term %name.', array('%name' => $form_state['values']['name']), WATCHDOG_NOTICE);

  $form_state['redirect'] = 'admin/structure/taxonomy';

  cache_clear_all();

  return;

}

/**

 * Form builder for the vocabulary delete confirmation form.

 *

 * @ingroup forms

 * @see taxonomy_vocabulary_confirm_delete_submit()

 */

function taxonomy_vocabulary_confirm_delete($form, &$form_state, $vid) {

  $vocabulary = taxonomy_vocabulary_load($vid);

  // Always provide entity id in the same form key as in the entity edit form.

  $form['vid'] = array('#type' => 'value', '#value' => $vid);

  $form['#vocabulary'] = $vocabulary;

  $form['#id'] = 'taxonomy_vocabulary_confirm_delete';

  $form['type'] = array('#type' => 'value', '#value' => 'vocabulary');

  $form['name'] = array('#type' => 'value', '#value' => $vocabulary->name);

  $form['#submit'] = array('taxonomy_vocabulary_confirm_delete_submit');

  return confirm_form($form,

    t('Are you sure you want to delete the vocabulary %title?',

    array('%title' => $vocabulary->name)),

    'admin/structure/taxonomy',

    t('Deleting a vocabulary will delete all the terms in it. This action cannot be undone.'),

    t('Delete'),

    t('Cancel'));

}

/**

 * Submit handler to delete a vocabulary after confirmation.

 *

 * @see taxonomy_vocabulary_confirm_delete()

 */

function taxonomy_vocabulary_confirm_delete_submit($form, &$form_state) {

  $status = taxonomy_vocabulary_delete($form_state['values']['vid']);

  drupal_set_message(t('Deleted vocabulary %name.', array('%name' => $form_state['values']['name'])));

  watchdog('taxonomy', 'Deleted vocabulary %name.', array('%name' => $form_state['values']['name']), WATCHDOG_NOTICE);

  $form_state['redirect'] = 'admin/structure/taxonomy';

  cache_clear_all();

  return;

}

/**

 * Form builder to confirm resetting a vocabulary to alphabetical order.

 *

 * @ingroup forms

 * @see taxonomy_vocabulary_confirm_reset_alphabetical_submit()

 */

function taxonomy_vocabulary_confirm_reset_alphabetical($form, &$form_state, $vid) {

  $vocabulary = taxonomy_vocabulary_load($vid);

  $form['type'] = array('#type' => 'value', '#value' => 'vocabulary');

  $form['vid'] = array('#type' => 'value', '#value' => $vid);

  $form['machine_name'] = array('#type' => 'value', '#value' => $vocabulary->machine_name);

  $form['name'] = array('#type' => 'value', '#value' => $vocabulary->name);

  $form['reset_alphabetical'] = array('#type' => 'value', '#value' => TRUE);

  return confirm_form($form,

                  t('Are you sure you want to reset the vocabulary %title to alphabetical order?',

                  array('%title' => $vocabulary->name)),

                  'admin/structure/taxonomy/' . $vocabulary->machine_name,

                  t('Resetting a vocabulary will discard all custom ordering and sort items alphabetically.'),

                  t('Reset to alphabetical'),

                  t('Cancel'));

}

/**

 * Submit handler to reset a vocabulary to alphabetical order after confirmation.

 *

 * @see taxonomy_vocabulary_confirm_reset_alphabetical()

 */

function taxonomy_vocabulary_confirm_reset_alphabetical_submit($form, &$form_state) {

  db_update('taxonomy_term_data')

    ->fields(array('weight' => 0))

    ->condition('vid', $form_state['values']['vid'])

    ->execute();

  drupal_set_message(t('Reset vocabulary %name to alphabetical order.', array('%name' => $form_state['values']['name'])));

  watchdog('taxonomy', 'Reset vocabulary %name to alphabetical order.', array('%name' => $form_state['values']['name']), WATCHDOG_NOTICE);

  $form_state['redirect'] = 'admin/structure/taxonomy/' . $form_state['values']['machine_name'];

}