<?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()));