riddler.module in Captcha Riddler 5

File

riddler.module

<?php

// $Id

/**
 * When enabled this module will add a required field to forms of your choice
 * asking a simple question to avoid automatic content creation by
 * f.e. spambots. The question and answers are custimizable.
 * Thanks to: nkoponen
 */

/* Implementation of hook_help */
function riddler_help($section = 'admin/help#riddler') {
  switch ($section) {
    case 'admin/modules#description':
      return t('Requires anonymous users to answer a simple question to be answered forms are processed. A primitive but effective way to counter spam.');
      break;
  }
}

/* Implementation of hook_perm */
function riddler_perm() {
  return array(
    'administer riddler',
  );
}

/* Implementation of hook_menu */
function riddler_menu($may_cache) {
  $items = array();
  if ($may_cache) {
    $access = user_access('administer riddler');
    $items[] = array(
      'path' => 'admin/user/captcha/riddler',
      'title' => t('Riddler'),
      'description' => t('Allows you to force a question to a number of forms to counter f.e. spammers.'),
      'callback' => 'drupal_get_form',
      'callback arguments' => array(
        'riddler_settings',
      ),
      'access' => $access,
      'type' => MENU_LOCAL_TASK,
    );
  }
  return $items;
}

/* Riddler settings form, called by drupal_get_form in menu */
function riddler_settings() {
  $form['riddler_question'] = array(
    '#type' => 'textfield',
    '#title' => t('Question'),
    '#description' => t('A question that you require anonymous users to answer'),
    '#default_value' => variable_get("riddler_question", "Do you hate spam? (yes or no)"),
    '#required' => TRUE,
  );
  $form['riddler_answer'] = array(
    '#type' => 'textfield',
    '#title' => t('Answer'),
    '#default_value' => variable_get("riddler_answer", "yes"),
    '#description' => t('Answer to the above question. Answers are not case sensitive'),
    '#required' => TRUE,
  );
  $form['riddler_weight'] = array(
    '#type' => 'select',
    '#title' => t('Weight'),
    '#default_value' => variable_get("riddler_weight", 0),
    '#options' => drupal_map_assoc(range(-10, 10)),
    '#description' => t('Weight of the Riddler form element'),
    '#required' => TRUE,
  );
  return system_settings_form($form);
}

/* Processing the settings form */

/*
function riddler_settings_submit ($form_id, $form_values) {
	variable_set("riddler_question", $form_values['question']);
	variable_set("riddler_answer", $form_values['answer']);
}
*/

/* Captcha implementation of Riddler */
function riddler_captcha($op, $captcha_type = '', $answer = '') {
  switch ($op) {
    case 'list':
      return array(
        "Riddler",
      );
      break;
    case 'generate':
      $result = array();
      if ($captcha_type == "Riddler") {
        $result = riddler_form();
      }
      return $result;
      break;

    // Answers changed to lowercase for case insensitivity
    case 'preprocess':
      $answer_lo = strtolower($answer);
      return $answer_lo;
      break;
  }
}
function riddler_form() {
  $form['preprocess'] = TRUE;
  $form['solution'] = (string) strtolower(variable_get("riddler_answer", "yes"));
  $form['form']['captcha_response'] = array(
    '#type' => 'textfield',
    '#title' => variable_get("riddler_question", "Do you hate spam? (yes or no)"),
    '#required' => TRUE,
    '#description' => t('Security question, designed to stop automated spam bots'),
    '#weight' => variable_get('riddler_weight', 0),
  );
  return $form;
}

Functions

Name	Description
riddler_captcha
riddler_form
riddler_help
riddler_menu
riddler_perm
riddler_settings