/**
* Initializes cookie-session
*/
public function init_session()
{
if (is_admin()) {
return;
}
if (isset($_COOKIE['mc_session_ids'])) {
$this->session_ids = $_COOKIE['mc_session_ids'];
} else {
foreach (array('default', 'multi') as $place) {
switch ($place) {
case 'multi':
for ($i = 0; $i < 5; $i++) {
$this->session_ids[$place][$i] = sha1($this->generate_password());
}
break;
case 'default':
$this->session_ids[$place] = sha1($this->generate_password());
break;
}
}
}
if (!isset($_COOKIE['mc_session_ids'])) {
setcookie('mc_session_ids[default]', $this->session_ids['default'], current_time('timestamp', true) + apply_filters('math_captcha_time', Math_Captcha()->options['general']['time']), COOKIEPATH, COOKIE_DOMAIN, isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' ? true : false, true);
for ($i = 0; $i < 5; $i++) {
setcookie('mc_session_ids[multi][' . $i . ']', $this->session_ids['multi'][$i], current_time('timestamp', true) + apply_filters('math_captcha_time', Math_Captcha()->options['general']['time']), COOKIEPATH, COOKIE_DOMAIN);
}
}
}
/**
*
*/
public function check_update()
{
if (!is_admin() || !current_user_can('manage_options')) {
return;
}
// gets current database version
$current_db_version = get_option('math_captcha_version', '1.0.0');
// new version?
if (version_compare($current_db_version, Math_Captcha()->defaults['version'], '<')) {
if (version_compare($current_db_version, '1.0.9', '<')) {
update_option('math_captcha_options', Math_Captcha()->options['general']);
delete_option('mc_options');
}
// updates plugin version
update_option('math_captcha_version', Math_Captcha()->defaults['version']);
}
}
function wpcf7_mathcaptcha_messages($messages)
{
return array_merge($messages, array('wrong_mathcaptcha' => array('description' => __('Invalid captcha value.', 'math-captcha'), 'default' => Math_Captcha()->core->error_messages['wrong']), 'fill_mathcaptcha' => array('description' => __('Please enter captcha value.', 'math-captcha'), 'default' => Math_Captcha()->core->error_messages['fill']), 'time_mathcaptcha' => array('description' => __('Captcha time expired.', 'math-captcha'), 'default' => Math_Captcha()->core->error_messages['time'])));
}
/**
* Validates settings
*/
public function validate_settings($input)
{
if (isset($_POST['save_mc_general'])) {
// enable captcha forms
$enable_for = array();
if (empty($input['enable_for'])) {
foreach (Math_Captcha()->defaults['general']['enable_for'] as $enable => $bool) {
$input['enable_for'][$enable] = false;
}
} else {
foreach ($this->forms as $enable => $trans) {
$enable_for[$enable] = in_array($enable, $input['enable_for']) ? true : false;
}
$input['enable_for'] = $enable_for;
}
if (!class_exists('WPCF7_ContactForm') && Math_Captcha()->options['general']['enable_for']['contact_form_7']) {
$input['enable_for']['contact_form_7'] = true;
}
if (!class_exists('bbPress') && Math_Captcha()->options['general']['enable_for']['bbpress']) {
$input['enable_for']['bbpress'] = true;
}
// enable mathematical operations
$mathematical_operations = array();
if (empty($input['mathematical_operations'])) {
add_settings_error('empty-operations', 'settings_updated', __('You need to check at least one mathematical operation. Defaults settings of this option restored.', 'math-captcha'), 'error');
$input['mathematical_operations'] = Math_Captcha()->defaults['general']['mathematical_operations'];
} else {
foreach ($this->mathematical_operations as $operation => $trans) {
$mathematical_operations[$operation] = in_array($operation, $input['mathematical_operations']) ? true : false;
}
$input['mathematical_operations'] = $mathematical_operations;
}
// enable groups
$groups = array();
if (empty($input['groups'])) {
add_settings_error('empty-groups', 'settings_updated', __('You need to check at least one group. Defaults settings of this option restored.', 'math-captcha'), 'error');
$input['groups'] = Math_Captcha()->defaults['general']['groups'];
} else {
foreach ($this->groups as $group => $trans) {
$groups[$group] = in_array($group, $input['groups']) ? true : false;
}
$input['groups'] = $groups;
}
// hide for logged in users
$input['hide_for_logged_users'] = isset($input['hide_for_logged_users']);
// block direct comments access
$input['block_direct_comments'] = isset($input['block_direct_comments']);
// deactivation delete
$input['deactivation_delete'] = isset($input['deactivation_delete']);
// captcha title
$input['title'] = trim($input['title']);
// captcha time
$time = (int) $input['time'];
$input['time'] = $time < 0 ? Math_Captcha()->defaults['general']['time'] : $time;
// flush rules
$input['flush_rules'] = true;
} elseif (isset($_POST['reset_mc_general'])) {
$input = Math_Captcha()->defaults['general'];
add_settings_error('settings', 'settings_reset', __('Settings restored to defaults.', 'math-captcha'), 'updated');
}
return $input;
}
}
return $links;
}
/**
* Add links to Settings page
*/
function plugin_settings_link($links, $file)
{
if (!is_admin() || !current_user_can('manage_options')) {
return $links;
}
static $plugin;
$plugin = plugin_basename(__FILE__);
if ($file == $plugin) {
$settings_link = sprintf('<a href="%s">%s</a>', admin_url('options-general.php') . '?page=math-captcha', __('Settings', 'math-captcha'));
array_unshift($links, $settings_link);
}
return $links;
}
}
function Math_Captcha()
{
static $instance;
// first call to instance() initializes the plugin
if ($instance === null || !$instance instanceof Math_Captcha) {
$instance = Math_Captcha::instance();
}
return $instance;
}
Math_Captcha();
/**
*
*/
public function block_direct_comments($rules)
{
if (Math_Captcha()->options['general']['block_direct_comments']) {
$new_rules = <<<EOT
# BEGIN Math Captcha
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_METHOD} POST
RewriteCond %{REQUEST_URI} .wp-comments-post.php*
RewriteCond %{HTTP_REFERER} !.*{$_SERVER['HTTP_HOST']}.* [OR]
RewriteCond %{HTTP_USER_AGENT} ^\$
RewriteRule (.*) ^http://%{REMOTE_ADDR}/\$ [R=301,L]
</IfModule>
# END Math Captcha
EOT;
return $new_rules . $rules;
}
return $rules;
}