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<?php
/**
* Integration API
*
* @link https://contactform7.com/integration-with-external-apis/
*/
class WPCF7_Integration {
private static $instance;
private $services = array();
private $categories = array();
private function __construct() {}
/**
* Returns initially supported service categories.
*
* @return array Service categories.
*/
public static function get_builtin_categories() {
return array(
'spam_protection' => __( 'Spam protection', 'contact-form-7' ),
'email_marketing' => __( 'Email marketing', 'contact-form-7' ),
'payments' => __( 'Payments', 'contact-form-7' ),
);
}
/**
* Returns the singleton instance of this class.
*
* @return WPCF7_Integration The instance.
*/
public static function get_instance() {
if ( empty( self::$instance ) ) {
self::$instance = new self;
self::$instance->categories = self::get_builtin_categories();
}
return self::$instance;
}
/**
* Adds a service to the services list.
*/
public function add_service( $name, WPCF7_Service $service ) {
$name = sanitize_key( $name );
if ( empty( $name )
or isset( $this->services[$name] ) ) {
return false;
}
$this->services[$name] = $service;
}
/**
* Adds a service category to the categories list.
*/
public function add_category( $name, $title ) {
$name = sanitize_key( $name );
if ( empty( $name )
or isset( $this->categories[$name] ) ) {
return false;
}
$this->categories[$name] = $title;
}
/**
* Returns true if a service with the name exists in the services list.
*
* @param string $name The name of service to search.
*/
public function service_exists( $name = '' ) {
if ( '' == $name ) {
return (bool) count( $this->services );
} else {
return isset( $this->services[$name] );
}
}
/**
* Returns a service object with the name.
*
* @param string $name The name of service.
* @return WPCF7_Service|bool The service object if it exists,
* false otherwise.
*/
public function get_service( $name ) {
if ( $this->service_exists( $name ) ) {
return $this->services[$name];
} else {
return false;
}
}
/**
* Prints services list.
*/
public function list_services( $args = '' ) {
$args = wp_parse_args( $args, array(
'include' => array(),
) );
$singular = false;
$services = (array) $this->services;
if ( ! empty( $args['include'] ) ) {
$services = array_intersect_key( $services,
array_flip( (array) $args['include'] )
);
if ( 1 == count( $services ) ) {
$singular = true;
}
}
if ( empty( $services ) ) {
return;
}
$action = wpcf7_current_action();
foreach ( $services as $name => $service ) {
$cats = array_intersect_key( $this->categories,
array_flip( $service->get_categories() )
);
?>
<div class="card<?php echo $service->is_active() ? ' active' : ''; ?>" id="<?php echo esc_attr( $name ); ?>">
<?php $service->icon(); ?>
<h2 class="title"><?php echo esc_html( $service->get_title() ); ?></h2>
<div class="infobox">
<?php echo esc_html( implode( ', ', $cats ) ); ?>
<br />
<?php $service->link(); ?>
</div>
<br class="clear" />
<div class="inside">
<?php
if ( $singular ) {
$service->display( $action );
} else {
$service->display();
}
?>
</div>
</div>
<?php
}
}
}
/**
* Abstract class for services.
*
* Only instances of this class's subclasses are allowed to be
* listed on the Integration page.
*/
abstract class WPCF7_Service {
abstract public function get_title();
abstract public function is_active();
public function get_categories() {
return array();
}
public function icon() {
return '';
}
public function link() {
return '';
}
public function load( $action = '' ) {
}
public function display( $action = '' ) {
}
public function admin_notice( $message = '' ) {
}
}
/**
* Class for services that use OAuth.
*
* While this is not an abstract class, subclassing this class for
* your aim is advised.
*/
class WPCF7_Service_OAuth2 extends WPCF7_Service {
protected $client_id = '';
protected $client_secret = '';
protected $access_token = '';
protected $refresh_token = '';
protected $authorization_endpoint = 'https://example.com/authorization';
protected $token_endpoint = 'https://example.com/token';
public function get_title() {
return '';
}
public function is_active() {
return ! empty( $this->refresh_token );
}
protected function save_data() {
}
protected function reset_data() {
}
protected function get_redirect_uri() {
return admin_url();
}
protected function menu_page_url( $args = '' ) {
return menu_page_url( 'wpcf7-integration', false );
}
public function load( $action = '' ) {
if ( 'auth_redirect' === $action ) {
$code = $_GET['code'] ?? '';
if ( $code ) {
$this->request_token( $code );
}
if ( ! empty( $this->access_token ) ) {
$message = 'success';
} else {
$message = 'failed';
}
wp_safe_redirect( $this->menu_page_url(
array(
'action' => 'setup',
'message' => $message,
)
) );
exit();
}
}
protected function authorize( $scope = '' ) {
$endpoint = add_query_arg(
array(
'response_type' => 'code',
'client_id' => $this->client_id,
'redirect_uri' => urlencode( $this->get_redirect_uri() ),
'scope' => $scope,
),
$this->authorization_endpoint
);
if ( wp_redirect( sanitize_url( $endpoint ) ) ) {
exit();
}
}
protected function get_http_authorization_header( $scheme = 'basic' ) {
$scheme = strtolower( trim( $scheme ) );
switch ( $scheme ) {
case 'bearer':
return sprintf( 'Bearer %s', $this->access_token );
case 'basic':
default:
return sprintf( 'Basic %s',
base64_encode( $this->client_id . ':' . $this->client_secret )
);
}
}
protected function request_token( $authorization_code ) {
$endpoint = add_query_arg(
array(
'code' => $authorization_code,
'redirect_uri' => urlencode( $this->get_redirect_uri() ),
'grant_type' => 'authorization_code',
),
$this->token_endpoint
);
$request = array(
'headers' => array(
'Authorization' => $this->get_http_authorization_header( 'basic' ),
),
);
$response = wp_remote_post( sanitize_url( $endpoint ), $request );
$response_code = (int) wp_remote_retrieve_response_code( $response );
$response_body = wp_remote_retrieve_body( $response );
$response_body = json_decode( $response_body, true );
if ( WP_DEBUG and 400 <= $response_code ) {
$this->log( $endpoint, $request, $response );
}
if ( 401 == $response_code ) { // Unauthorized
$this->access_token = null;
$this->refresh_token = null;
} else {
if ( isset( $response_body['access_token'] ) ) {
$this->access_token = $response_body['access_token'];
} else {
$this->access_token = null;
}
if ( isset( $response_body['refresh_token'] ) ) {
$this->refresh_token = $response_body['refresh_token'];
} else {
$this->refresh_token = null;
}
}
$this->save_data();
return $response;
}
protected function refresh_token() {
$endpoint = add_query_arg(
array(
'refresh_token' => $this->refresh_token,
'grant_type' => 'refresh_token',
),
$this->token_endpoint
);
$request = array(
'headers' => array(
'Authorization' => $this->get_http_authorization_header( 'basic' ),
),
);
$response = wp_remote_post( sanitize_url( $endpoint ), $request );
$response_code = (int) wp_remote_retrieve_response_code( $response );
$response_body = wp_remote_retrieve_body( $response );
$response_body = json_decode( $response_body, true );
if ( WP_DEBUG and 400 <= $response_code ) {
$this->log( $endpoint, $request, $response );
}
if ( 401 == $response_code ) { // Unauthorized
$this->access_token = null;
$this->refresh_token = null;
} else {
if ( isset( $response_body['access_token'] ) ) {
$this->access_token = $response_body['access_token'];
} else {
$this->access_token = null;
}
if ( isset( $response_body['refresh_token'] ) ) {
$this->refresh_token = $response_body['refresh_token'];
}
}
$this->save_data();
return $response;
}
protected function remote_request( $url, $request = array() ) {
static $refreshed = false;
$request = wp_parse_args( $request, array() );
$request['headers'] = array_merge(
$request['headers'],
array(
'Authorization' => $this->get_http_authorization_header( 'bearer' ),
)
);
$response = wp_remote_request( sanitize_url( $url ), $request );
if ( 401 === wp_remote_retrieve_response_code( $response )
and ! $refreshed ) {
$this->refresh_token();
$refreshed = true;
$response = $this->remote_request( $url, $request );
}
return $response;
}
protected function log( $url, $request, $response ) {
wpcf7_log_remote_request( $url, $request, $response );
}
}