ajax_captcha.module

<?php
/**
 * AJAX Captcha Plugin
 *
 * @see http://drupal.org/project/ajax
 * @see irc://freenode.net/#drupy
 * @depends Drupal 6
 * @author brendoncrawford
 * @note This file uses a 79 character width limit.
 *
 */

/**
 * validation fail hook
 *
 * @param $form Assoc
 * @param $form_state Assoc
 * @param $data Assoc
 * @return Bool
 */
function ajax_captcha_ajax_validate_fail(&$form, &$form_state, &$data) {
  ajax_captcha_process($form, $form_state, $data);
  return TRUE;
}

/**
 * validation fail hook
 *
 * @param $form Assoc
 * @param $form_state Assoc
 * @param $data Assoc
 * @return Bool
 */
function ajax_captcha_ajax_validate_pass(&$form, &$form_state, &$data, &$pass) {
  ajax_captcha_process($form, $form_state, $data);
  return TRUE;
}


/**
 * Captcha functionality
 * This depends on the provided captcha patches
 *
 * @param $form Assoc
 * @param $form_state Assoc
 * @param $data Assoc
 * @return Bool
 */

function ajax_captcha_process(&$form, &$form_state, &$data) {
  //print_r($data);
  if (array_key_exists('captcha_token', $form_state['values']) &&
      array_key_exists('captcha_type', $form_state['values']) &&
      array_key_exists('captcha_query', $form_state['values'])) {
    //$data['debug'] .= 'B';
    // Conditional show
    if (_captcha_required_for_user($form_state['values']['captcha_sid'], $form_id) == NULL) {
      $data['updaters'][] = array(
          'type' => 'hide',
          'selector' => 'fieldset.captcha',
          'value' => NULL
      );
      //$data['debug'] .= 'C';
    }
    //$data['debug'] .= 'D';
    // MATH
    if ($form_state['values']['captcha_type'] === 'math') {
      $selector =
        "#edit-captcha-response-wrapper .field-prefix";
      $type = 'html_in';
      //$data['debug'] .= 'E';
    }
    elseif ($form_state['values']['captcha_type'] === 'text') {
      $selector =
        "#edit-captcha-response-wrapper label[for='edit-captcha-response']";
      $type = 'html_in';
      //$data['debug'] .= 'F';
    }
    elseif ($form_state['values']['captcha_type'] === 'image') {
      $selector =
        ".captcha img";
      $type = 'html_out';
      //$data['debug'] .= 'G';
    }
    $data['updaters'][] = array(
      'type' => 'field',
      'selector' => '#edit-captcha-token',
      'value' => $form_state['values']['captcha_token']
    );
    $data['updaters'][] = array(
      'type' => $type,
      'selector' => $selector,
      'value' => $form_state['values']['captcha_query']
    );
    $data['updaters'][] = array(
      'type' => 'field',
      'selector' => '#edit-captcha-response',
      'value' => ''
    );
    theme_captcha($form);
  }
  
  return TRUE;
}