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<?php
require_once drupal_get_path('module', 'word_list_captcha') . '/../text_captcha.inc';
define('WORD_LIST_CAPTCHA_WORD_POOL1', 'green red blue yellow black white magenta cyan orange violet purple gold brown pink');
define('WORD_LIST_CAPTCHA_WORD_POOL2', 'bird elephant dog cat crocodile lion fish cow horse sheep frog beetle worm spider bat giraffe lizard goat monkey rabbit chimpanzee');
function word_list_captcha_help($path, $arg) {
switch ($path) {
case 'admin/config/people/captcha/word_list_captcha':
return '<p>' . t('The unrelated word CAPTCHA consists of a list of closely related words with one non-related word, which the user has to select. To generate this list, two word pools are needed: one for the related words and one for the non-related word.') . '</p>';
}
}
function word_list_captcha_menu() {
$items = array();
$items['admin/config/people/captcha/word_list_captcha'] = array(
'title' => 'Unrelated word',
'file' => 'word_list_captcha.admin.inc',
'page callback' => 'drupal_get_form',
'page arguments' => array(
'word_list_captcha_settings_form',
),
'access arguments' => array(
'administer CAPTCHA settings',
),
'type' => MENU_LOCAL_TASK,
);
return $items;
}
function _word_list_captcha_get_word_list_captcha($list_size) {
if (mt_rand(0, 1)) {
$normal_words = _text_captcha_word_pool_get_content('word_list_captcha_word_pool_1', NULL, WORD_LIST_CAPTCHA_WORD_POOL1, TRUE);
$other_words = _text_captcha_word_pool_get_content('word_list_captcha_word_pool_2', NULL, WORD_LIST_CAPTCHA_WORD_POOL2, TRUE);
}
else {
$normal_words = _text_captcha_word_pool_get_content('word_list_captcha_word_pool_2', NULL, WORD_LIST_CAPTCHA_WORD_POOL2, TRUE);
$other_words = _text_captcha_word_pool_get_content('word_list_captcha_word_pool_1', NULL, WORD_LIST_CAPTCHA_WORD_POOL1, TRUE);
}
shuffle($normal_words);
$word_list = array_slice($normal_words, 0, $list_size - 1);
$wrong_word = $other_words[array_rand($other_words)];
$word_list[] = $wrong_word;
shuffle($word_list);
return array(
$word_list,
$wrong_word,
);
}
function word_list_captcha_captcha($op, $captcha_type = '') {
switch ($op) {
case 'list':
return array(
'Pick the unrelated word',
);
break;
case 'generate':
if ($captcha_type == 'Pick the unrelated word') {
$list_size = variable_get('word_list_captcha_list_size', 5);
list($word_list, $wrong_word) = _word_list_captcha_get_word_list_captcha($list_size);
$options = array();
foreach ($word_list as $word) {
$options[$word] = $word;
}
$captcha = array();
$captcha['solution'] = $wrong_word;
$captcha['form']['captcha_response'] = array(
'#type' => 'radios',
'#title' => t('Which word does not belong to the list?'),
'#options' => $options,
'#attributes' => array(
'class' => array(
'text-captcha-word-list-radios',
),
),
'#DANGEROUS_SKIP_CHECK' => TRUE,
'#required' => TRUE,
);
$captcha['#attached']['css'] = array(
drupal_get_path('module', 'word_list_captcha') . '/../text_captcha.css',
);
return $captcha;
}
}
}