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<?php
/**
* Turnstile service main file
*/
if ( ! class_exists( 'WPCF7_Service' ) ) {
return;
}
class WPCF7_Turnstile extends WPCF7_Service {
private static $instance;
private $sitekeys;
/**
* Returns the singleton instance of the class.
*/
public static function get_instance() {
if ( empty( self::$instance ) ) {
self::$instance = new self();
}
return self::$instance;
}
/**
* The constructor.
*/
private function __construct() {
$this->sitekeys = WPCF7::get_option( 'turnstile' );
}
/**
* Returns the service title.
*/
public function get_title() {
return __( 'Turnstile', 'contact-form-7' );
}
/**
* Returns true if the service is active.
*/
public function is_active() {
$sitekey = $this->get_sitekey();
$secret = $this->get_secret( $sitekey );
return $sitekey && $secret;
}
/**
* Returns an array of categories to which the service belongs to.
*/
public function get_categories() {
return array( 'spam_protection' );
}
/**
* Returns the icon that represents the service.
*/
public function icon() {
}
/**
* Returns a link to the service provider.
*/
public function link() {
echo wp_kses_data( wpcf7_link(
'https://www.cloudflare.com/application-services/products/turnstile/',
'cloudflare.com'
) );
}
/**
* Returns a sitekey.
*/
public function get_sitekey() {
$sitekeys = (array) $this->sitekeys;
$sitekey = array_key_first( $sitekeys ) ?? '';
return apply_filters( 'wpcf7_turnstile_sitekey', $sitekey );
}
/**
* Returns the secret key that is paired with the given sitekey.
*/
public function get_secret( $sitekey ) {
$sitekeys = (array) $this->sitekeys;
$secret = $sitekeys[$sitekey] ?? '';
return apply_filters( 'wpcf7_turnstile_secret', $secret );
}
/**
* Logs an API response.
*/
protected function log( $url, $request, $response ) {
wpcf7_log_remote_request( $url, $request, $response );
}
/**
* Verifies a response token.
*/
public function verify( $token ) {
$is_human = false;
if ( empty( $token ) or ! $this->is_active() ) {
return $is_human;
}
$endpoint = 'https://challenges.cloudflare.com/turnstile/v0/siteverify';
$sitekey = $this->get_sitekey();
$secret = $this->get_secret( $sitekey );
$request = array(
'body' => array(
'secret' => $secret,
'response' => $token,
),
);
$response = wp_remote_post( sanitize_url( $endpoint ), $request );
if ( 200 !== wp_remote_retrieve_response_code( $response ) ) {
if ( WP_DEBUG ) {
$this->log( $endpoint, $request, $response );
}
return $is_human;
}
$response_body = wp_remote_retrieve_body( $response );
$response_body = json_decode( $response_body, true );
if ( $response_body['success'] ) {
$is_human = true;
}
if ( $submission = WPCF7_Submission::get_instance() ) {
$submission->push( 'turnstile', array(
'response' => $response_body,
) );
}
return $is_human;
}
/**
* Returns the menu page URL for the service configuration.
*/
protected function menu_page_url( $args = '' ) {
$args = wp_parse_args( $args, array() );
$url = menu_page_url( 'wpcf7-integration', false );
$url = add_query_arg( array( 'service' => 'turnstile' ), $url );
if ( ! empty( $args ) ) {
$url = add_query_arg( $args, $url );
}
return $url;
}
/**
* Saves the service configuration data.
*/
protected function save_data() {
WPCF7::update_option( 'turnstile', $this->sitekeys );
}
/**
* Resets the service configuration data.
*/
protected function reset_data() {
$this->sitekeys = null;
$this->save_data();
}
/**
* The loading process of the service configuration page.
*/
public function load( $action = '' ) {
if (
'setup' === $action and
'POST' === wpcf7_superglobal_server( 'REQUEST_METHOD' )
) {
check_admin_referer( 'wpcf7-turnstile-setup' );
if ( wpcf7_superglobal_post( 'reset' ) ) {
$this->reset_data();
$redirect_to = $this->menu_page_url( 'action=setup' );
} else {
$sitekey = wpcf7_superglobal_post( 'sitekey' );
$secret = wpcf7_superglobal_post( 'secret' );
if ( $sitekey and $secret ) {
$this->sitekeys = array( $sitekey => $secret );
$this->save_data();
$redirect_to = $this->menu_page_url( array(
'message' => 'success',
) );
} else {
$redirect_to = $this->menu_page_url( array(
'action' => 'setup',
'message' => 'invalid',
) );
}
}
wp_safe_redirect( $redirect_to );
exit();
}
}
/**
* Displays a notice on the integration page.
*/
public function admin_notice( $message = '' ) {
if ( 'invalid' === $message ) {
wp_admin_notice(
wp_kses_data( __( '<strong>Error:</strong> Invalid key values.', 'contact-form-7' ) ),
array( 'type' => 'error' )
);
}
if ( 'success' === $message ) {
wp_admin_notice(
wp_kses_data( __( 'Settings saved.', 'contact-form-7' ) ),
array( 'type' => 'success' )
);
}
}
/**
* Displays the service configuration box.
*/
public function display( $action = '' ) {
$formatter = new WPCF7_HTMLFormatter( array(
'allowed_html' => array_merge( wpcf7_kses_allowed_html(), array(
'form' => array(
'action' => true,
'method' => true,
),
) ),
) );
$formatter->append_start_tag( 'p' );
$formatter->append_preformatted(
esc_html( __( 'Turnstile is Cloudflare’s smart CAPTCHA alternative, which confirms web visitors are real and blocks unwanted bots without slowing down web experiences for real users.', 'contact-form-7' ) )
);
$formatter->end_tag( 'p' );
$formatter->append_start_tag( 'p' );
$formatter->append_start_tag( 'strong' );
$formatter->append_preformatted(
wpcf7_link(
__( 'https://contactform7.com/turnstile-integration/', 'contact-form-7' ),
__( 'Cloudflare Turnstile integration', 'contact-form-7' )
)
);
$formatter->end_tag( 'p' );
if ( $this->is_active() ) {
$formatter->append_start_tag( 'p', array(
'class' => 'dashicons-before dashicons-yes',
) );
$formatter->append_preformatted(
esc_html( __( 'Turnstile is active on this site.', 'contact-form-7' ) )
);
$formatter->end_tag( 'p' );
}
if ( 'setup' === $action ) {
$formatter->call_user_func( function () {
$this->display_setup();
} );
} else {
$formatter->append_start_tag( 'p' );
$formatter->append_start_tag( 'a', array(
'href' => esc_url( $this->menu_page_url( 'action=setup' ) ),
'class' => 'button',
) );
$formatter->append_preformatted(
esc_html( __( 'Setup integration', 'contact-form-7' ) )
);
$formatter->end_tag( 'p' );
}
$formatter->print();
}
/**
* Displays the service setup form.
*/
private function display_setup() {
$sitekey = $this->is_active() ? $this->get_sitekey() : '';
$secret = $this->is_active() ? $this->get_secret( $sitekey ) : '';
?>
<form method="post" action="<?php echo esc_url( $this->menu_page_url( 'action=setup' ) ); ?>">
<?php wp_nonce_field( 'wpcf7-turnstile-setup' ); ?>
<table class="form-table">
<tbody>
<tr>
<th scope="row"><label for="sitekey"><?php echo esc_html( __( 'Site Key', 'contact-form-7' ) ); ?></label></th>
<td><?php
if ( $this->is_active() ) {
echo esc_html( $sitekey );
echo sprintf(
'<input type="hidden" value="%1$s" id="sitekey" name="sitekey" />',
esc_attr( $sitekey )
);
} else {
echo sprintf(
'<input type="text" aria-required="true" value="%1$s" id="sitekey" name="sitekey" class="regular-text code" />',
esc_attr( $sitekey )
);
}
?></td>
</tr>
<tr>
<th scope="row"><label for="secret"><?php echo esc_html( __( 'Secret Key', 'contact-form-7' ) ); ?></label></th>
<td><?php
if ( $this->is_active() ) {
echo esc_html( wpcf7_mask_password( $secret, 4, 4 ) );
echo sprintf(
'<input type="hidden" value="%1$s" id="secret" name="secret" />',
esc_attr( $secret )
);
} else {
echo sprintf(
'<input type="text" aria-required="true" value="%1$s" id="secret" name="secret" class="regular-text code" />',
esc_attr( $secret )
);
}
?></td>
</tr>
</tbody>
</table>
<?php
if ( $this->is_active() ) {
submit_button(
_x( 'Remove Keys', 'API keys', 'contact-form-7' ),
'small', 'reset'
);
} else {
submit_button( __( 'Save Changes', 'contact-form-7' ) );
}
?>
</form>
<?php
}
}