function taxonomy_overview_terms_submit

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 also

taxonomy_overview_terms()

File

modules/taxonomy/taxonomy.admin.inc, line 436

Code

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']] = $term;
            }
            elseif ($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.'));
}