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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 ); } }
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