function taxonomy_form_alter

Implementation of hook_form_alter(). Generate a form for selecting terms to associate with a node. We check for taxonomy_override_selector before loading the full vocabulary, so contrib modules can intercept before hook_form_alter and provide scalable alternatives.

File

modules/taxonomy/taxonomy.module, line 507

Enables the organization of content into categories.

Code

function taxonomy_form_alter(&$form, $form_state, $form_id) {
  if (isset($form['type']) && isset($form['#node']) && !variable_get('taxonomy_override_selector', FALSE) && $form['type']['#value'] . '_node_form' == $form_id) {
    $node = $form['#node'];
    if (!isset($node->taxonomy)) {
      $terms = empty($node->nid) ? array() : taxonomy_node_get_terms($node);
    }
    else {

      // After a preview or form reload, the terms must be converted to objects.
      reset($node->taxonomy);
      if (!is_object(current($node->taxonomy))) {
        $node->taxonomy = taxonomy_preview_terms($node);
      }
      $terms = $node->taxonomy;
    }
    $c = db_query(db_rewrite_sql("SELECT v.* FROM {vocabulary} v INNER JOIN {vocabulary_node_types} n ON v.vid = n.vid WHERE n.type = '%s' ORDER BY v.weight, v.name", 'v', 'vid'), $node->type);
    while ($vocabulary = db_fetch_object($c)) {
      if ($vocabulary->tags) {
        if (isset($form_state['node_preview'])) {

          // Typed string can be changed by the user before preview,
          // so we just insert the tags directly as provided in the form.
          $typed_string = $node->taxonomy['tags'][$vocabulary->vid];
        }
        else {
          $typed_string = taxonomy_implode_tags($terms, $vocabulary->vid) . (array_key_exists('tags', $terms) ? $terms['tags'][$vocabulary->vid] : NULL);
        }
        if ($vocabulary->help) {
          $help = filter_xss_admin($vocabulary->help);
        }
        else {
          $help = t('A comma-separated list of terms describing this content. Example: funny, bungee jumping, "Company, Inc.".');
        }
        $form['taxonomy']['tags'][$vocabulary->vid] = array(
          '#type' => 'textfield',
          '#title' => $vocabulary->name,
          '#description' => $help,
          '#required' => $vocabulary->required,
          '#default_value' => $typed_string,
          '#autocomplete_path' => 'taxonomy/autocomplete/' . $vocabulary->vid,
          '#weight' => $vocabulary->weight,
          '#maxlength' => 1024,
        );
      }
      else {

        // Extract terms belonging to the vocabulary in question.
        $default_terms = array();
        foreach ($terms as $term) {

          // Free tagging has no default terms and also no vid after preview.
          if (isset($term->vid) && $term->vid == $vocabulary->vid) {
            $default_terms[$term->tid] = $term;
          }
        }
        $form['taxonomy'][$vocabulary->vid] = taxonomy_form($vocabulary->vid, array_keys($default_terms), filter_xss_admin($vocabulary->help));
        $form['taxonomy'][$vocabulary->vid]['#weight'] = $vocabulary->weight;
        $form['taxonomy'][$vocabulary->vid]['#required'] = $vocabulary->required;
      }
    }
    if (!empty($form['taxonomy']) && is_array($form['taxonomy'])) {
      if (count($form['taxonomy']) > 1) {

        // Add fieldset only if form has more than 1 element.
        $form['taxonomy'] += array(
          '#type' => 'fieldset',
          '#title' => t('Vocabularies'),
          '#collapsible' => TRUE,
          '#collapsed' => FALSE,
        );
      }
      $form['taxonomy']['#weight'] = -3;
      $form['taxonomy']['#tree'] = TRUE;
    }
  }
}