class-custom.php
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<?php
defined('ABSPATH') or exit;
/**
* Class MC4WP_Custom_Integration
* @ignore
*/
class MC4WP_Custom_Integration extends MC4WP_Integration
{
/**
* @var string
*/
protected $checkbox_name = 'mc4wp-subscribe';
/**
* @var string
*/
public $name = 'Custom';
/**
* @var string
*/
public $description = 'Integrate with custom third-party forms.';
/**
* Add hooks
*/
public function add_hooks()
{
add_action('init', array( $this, 'listen' ), 50);
}
/**
* Was the integration checkbox checked?
*
* @return bool
*/
public function checkbox_was_checked()
{
$data = $this->get_data();
$value = isset($data[ $this->checkbox_name ]) ? $data[ $this->checkbox_name ] : '';
$truthy_values = array( 1, '1', 'yes', true, 'true', 'y' );
return in_array($value, $truthy_values, true);
}
/**
* Maybe fire a general subscription request
*
* @return bool|string
*/
public function listen()
{
if (! $this->checkbox_was_checked()) {
return false;
}
// ignore requests from bots, crawlers and link previews
if (empty($_SERVER['HTTP_USER_AGENT']) || preg_match('/bot|crawl|spider|seo|lighthouse|facebookexternalhit|preview/i', $_SERVER['HTTP_USER_AGENT'])) {
return false;
}
// ignore requests without an HTTP referrer
if (empty($_SERVER['HTTP_REFERER'])) {
return false;
}
// ignore requests where HTTP Referer does not contain hostname from home_url
$site_hostname = parse_url(get_home_url(), PHP_URL_HOST);
if (strpos($_SERVER['HTTP_REFERER'], $site_hostname) === false) {
return false;
}
$data = $this->get_data();
// don't run for CF7 or Events Manager requests
// (since they use the same "mc4wp-subscribe" trigger)
$disable_triggers = array(
'_wpcf7' => '',
'action' => 'booking_add',
);
foreach ($disable_triggers as $trigger => $trigger_value) {
if (isset($data[ $trigger ])) {
$value = $data[ $trigger ];
// do nothing if trigger value is optional
// or if trigger value matches
if (empty($trigger_value) || $value === $trigger_value) {
return false;
}
}
}
// run!
return $this->process();
}
/**
* Process custom form
*
* @return bool|string
*/
public function process()
{
$parser = new MC4WP_Field_Guesser($this->get_data());
$data = $parser->combine(array( 'guessed', 'namespaced' ));
// do nothing if no email was found
if (empty($data['EMAIL'])) {
$this->get_log()->warning(sprintf('%s > Unable to find EMAIL field.', $this->name));
return false;
}
return $this->subscribe($data);
}
/**
* @return bool
*/
public function is_installed()
{
return true;
}
/**
* @return array
*/
public function get_ui_elements()
{
return array( 'lists', 'double_optin', 'update_existing', 'replace_interests' );
}
}