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<?php
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/**
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* @file
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* Protects email addresses using the reCAPTCHA web service.
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*/
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/**
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* Implements hook_help().
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*/
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function recaptcha_mailhide_help($path, $arg) {
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$output = '';
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switch ($path) {
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case 'admin/modules#name':
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$output .= t('reCAPTCHA');
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break;
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case 'admin/modules#description':
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$output .= t('Uses the <a href="@url" target="_blank">reCAPTCHA</a> web service to protect email addresses.', array('@url' => url('https://www.google.com/recaptcha')));
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break;
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case 'admin/help#recaptcha':
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$output .= '<p>' .
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t('Uses the reCAPTCHA web service to protect email addresses. For more information on what reCAPTCHA Mailhide is, visit <a href="@url" target="_blank">the official website</a>.', array('@url' => url('https://www.google.com/recaptcha/mailhide/'))) .
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'</p><h3>' .
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t('Configuration') .
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'</h3><p>' .
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t('Head over to the <a href="@inputformats">input format settings</a> and add the <a href="@url" target="_blank">reCAPTCHA Mailhide</a> input filter to hide posted emails.', array('@inputformats' => url('admin/settings/filter'), '@url' => url('https://www.google.com/recaptcha/mailhide/'))) .
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'</p>';
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break;
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}
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return $output;
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}
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/**
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* Implements hook_filter_info().
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*/
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function recaptcha_mailhide_filter_info() {
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$filters['filter_recaptcha_mailhide'] = array(
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'title' => t('reCAPTCHA Mailhide'),
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'description' => _filter_recaptcha_mailhide_tips('', ''),
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'process callback' => '_filter_recaptcha_mailhide',
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'settings callback' => '_filter_recaptcha_mailhide_settings',
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'tips callback' => '_filter_recaptcha_mailhide_tips',
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'cache' => FALSE,
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);
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return $filters;
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}
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/**
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* Filter callbacks.
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*/
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function _filter_recaptcha_mailhide($text, $filter, $format) {
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global $_recaptcha_mailhide_public_key, $_recaptcha_mailhide_private_key, $_recaptcha_mailhide_nokey_warn;
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_recaptcha_mailhide_load_library();
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$_recaptcha_mailhide_public_key = $filter->settings['recaptcha_mailhide_public_key'];
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$_recaptcha_mailhide_private_key = $filter->settings['recaptcha_mailhide_private_key'];
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$text = ' ' . $text . ' ';
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$text = preg_replace_callback("!(<p>|<li>|<br\s*/?>|[ \n\r\t\(])([A-Za-z0-9._-]+@[A-Za-z0-9._+-]+\.[A-Za-z]{2,4})([.,?]?)(?=(</p>|</li>|<br\s*/?>|[ \n\r\t\)]))!i", '_recaptcha_replace', $text);
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$text = drupal_substr($text, 1, -1);
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unset($_recaptcha_mailhide_public_key);
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unset($_recaptcha_mailhide_private_key);
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unset($_recaptcha_mailhide_nokey_warn);
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return $text;
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}
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function _filter_recaptcha_mailhide_settings($form, &$form_state, $filter, $format, $defaults, $filters) {
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_recaptcha_mailhide_load_library();
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$public = isset($filter->settings['recaptcha_mailhide_public_key']) ? $filter->settings['recaptcha_mailhide_public_key'] : '';
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$private = isset($filter->settings['recaptcha_mailhide_private_key']) ? $filter->settings['recaptcha_mailhide_private_key'] : '';
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$settings['recaptcha_mailhide_public_key'] = array(
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'#type' => 'textfield',
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'#title' => t('Public Key'),
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'#default_value' => $public,
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'#maxlength' => 50,
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'#description' => t('Your public Mailhide key obtained from <a href="@url" target="_blank">reCAPTCHA</a>.', array('@url' => 'https://www.google.com/recaptcha/mailhide/apikey')),
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);
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$settings['recaptcha_mailhide_private_key'] = array(
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'#type' => 'textfield',
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'#title' => t('Private Key'),
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'#default_value' => $private,
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'#maxlength' => 50,
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'#description' => t('Your private Mailhide key obtained from <a href="@url" target="_blank">reCAPTCHA</a>.', array('@url' => 'https://www.google.com/recaptcha/mailhide/apikey')),
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);
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return $settings;
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}
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function _filter_recaptcha_mailhide_tips($filter, $format, $long = FALSE) {
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return t('E-Mail addresses are hidden with <a href="@url" target="_blank">reCAPTCHA Mailhide</a>.', array('@url' => 'https://www.google.com/recaptcha/mailhide/'));
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}
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/**
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* Private reCAPTCHA function to replace an email regex match
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*/
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function _recaptcha_replace($match) {
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global $_recaptcha_mailhide_public_key, $_recaptcha_mailhide_private_key, $_recaptcha_mailhide_nokey_warn;
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// recaptchalib will die if we invoke without setting the keys. Fail gracefully in this case.
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if (empty($_recaptcha_mailhide_public_key) || empty($_recaptcha_mailhide_private_key) || !function_exists('mcrypt_encrypt')) {
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if ($_recaptcha_mailhide_nokey_warn != TRUE) {
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if (!function_exists('mcrypt_encrypt')) {
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drupal_set_message(t('Addresses cannot be hidden because Mcrypt is not installed.'), 'error');
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}
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else {
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drupal_set_message(t('Addresses cannot be hidden because the administrator has not set the reCAPTCHA Mailhide keys.'), 'error');
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}
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$_recaptcha_mailhide_nokey_warn = TRUE;
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}
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$email = $match[2];
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}
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else {
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$email = recaptcha_mailhide_html($_recaptcha_mailhide_public_key, $_recaptcha_mailhide_private_key, $match[2]);
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}
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return $match[1] . $email . $match[3];
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}
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/**
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* Load the recaptcha library.
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*/
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function _recaptcha_mailhide_load_library() {
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module_load_include('php', 'recaptcha', 'recaptcha-php-1.11/recaptchalib');
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}
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