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| 1 | <?php |
| 2 | /** |
| 3 | * Local REST routes that forward the dashboard's WordPress.com API calls as the current user. |
| 4 | * |
| 5 | * @package automattic/jetpack-monetize |
| 6 | */ |
| 7 | |
| 8 | namespace Automattic\Jetpack\Monetize; |
| 9 | |
| 10 | use Automattic\Jetpack\Connection\Traits\WPCOM_REST_API_Proxy_Request; |
| 11 | use WP_REST_Request; |
| 12 | |
| 13 | if ( ! defined( 'ABSPATH' ) ) { |
| 14 | exit( 0 ); |
| 15 | } |
| 16 | |
| 17 | /** |
| 18 | * Registers `jetpack/v4/monetize/<api>/<path>` routes that each forward to the same `<api>/sites/<id>/<path>` on WordPress.com. |
| 19 | * |
| 20 | * The local path mirrors the upstream one, so the page's client only swaps the prefix: Simple sites call WordPress.com directly. |
| 21 | * |
| 22 | * @since $$next-version$$ |
| 23 | */ |
| 24 | class WPCOM_Proxy { |
| 25 | use WPCOM_REST_API_Proxy_Request; |
| 26 | |
| 27 | const REST_NAMESPACE = 'jetpack/v4'; |
| 28 | |
| 29 | const REST_BASE = 'monetize'; |
| 30 | |
| 31 | /** |
| 32 | * The WordPress.com APIs a route can forward to, with each one's base path and version. |
| 33 | * |
| 34 | * @var array<string, string[]> |
| 35 | */ |
| 36 | const APIS = array( |
| 37 | 'wpcom/v2' => array( 'wpcom', 'v2' ), |
| 38 | 'rest/v1.1' => array( 'rest', '1.1' ), |
| 39 | ); |
| 40 | |
| 41 | /** |
| 42 | * Set up a proxy for one upstream path. |
| 43 | * |
| 44 | * @param string $api A key of APIS. |
| 45 | * @param string $upstream_path Path under `/sites/<id>/`. |
| 46 | */ |
| 47 | private function __construct( $api, $upstream_path ) { |
| 48 | list( $this->base_api_path, $this->version ) = self::APIS[ $api ]; |
| 49 | $this->rest_base = $upstream_path; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Register a route that forwards to the same path on WordPress.com. |
| 54 | * |
| 55 | * @param string $api A key of APIS. |
| 56 | * @param string $path Route pattern under `/sites/<id>/`, e.g. `memberships/product/(?P<id>\d+)`. |
| 57 | * @param string|array $methods HTTP methods the route accepts. |
| 58 | * @param array $args Route args: only these and `_locale` are forwarded, once validated and sanitized. |
| 59 | * @return bool Whether the route was registered. |
| 60 | */ |
| 61 | public static function register_route( $api, $path, $methods, array $args = array() ) { |
| 62 | if ( ! isset( self::APIS[ $api ] ) ) { |
| 63 | /* translators: %s is a WordPress.com API, such as wpcom/v2. */ |
| 64 | $message = sprintf( __( 'Unknown WordPress.com API "%s".', 'jetpack-monetize' ), $api ); |
| 65 | _doing_it_wrong( __METHOD__, esc_html( $message ), '$$next-version$$' ); |
| 66 | return false; |
| 67 | } |
| 68 | |
| 69 | return register_rest_route( |
| 70 | self::REST_NAMESPACE, |
| 71 | '/' . self::REST_BASE . '/' . $api . '/' . $path, |
| 72 | array( |
| 73 | 'methods' => $methods, |
| 74 | 'callback' => static function ( WP_REST_Request $request ) use ( $api ) { |
| 75 | return self::forward( $api, $request ); |
| 76 | }, |
| 77 | 'permission_callback' => array( Dashboard::class, 'can_manage' ), |
| 78 | // apiFetch adds `_locale=user` to every request, so WordPress.com answers in the user's language. |
| 79 | 'args' => $args + array( |
| 80 | '_locale' => array( |
| 81 | 'type' => 'string', |
| 82 | 'enum' => array( 'user' ), |
| 83 | ), |
| 84 | ), |
| 85 | ) |
| 86 | ); |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Forward a request to its upstream path as the current user. |
| 91 | * |
| 92 | * @param string $api A key of APIS. |
| 93 | * @param WP_REST_Request $request The request to one of this class's routes. |
| 94 | * @return \WP_REST_Response|\WP_Error |
| 95 | */ |
| 96 | public static function forward( $api, WP_REST_Request $request ) { |
| 97 | $prefix = '/' . self::REST_NAMESPACE . '/' . self::REST_BASE . '/' . $api . '/'; |
| 98 | $upstream = substr( $request->get_route(), strlen( $prefix ) ); |
| 99 | |
| 100 | return rest_ensure_response( ( new self( $api, $upstream ) )->proxy_request_to_wpcom_as_user( self::with_declared_args_only( $request ) ) ); |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * A copy of the request that keeps only its route's declared args, with the values WordPress sanitized. |
| 105 | * |
| 106 | * The body goes out as JSON whatever its incoming encoding, since that is the only body the proxy sends. |
| 107 | * |
| 108 | * @param WP_REST_Request $request The request to one of this class's routes. |
| 109 | * @return WP_REST_Request |
| 110 | */ |
| 111 | private static function with_declared_args_only( WP_REST_Request $request ) { |
| 112 | $declared = $request->get_attributes()['args'] ?? array(); |
| 113 | $forwarded = new WP_REST_Request( $request->get_method(), $request->get_route() ); |
| 114 | $forwarded->set_query_params( array_intersect_key( $request->get_query_params(), $declared ) ); |
| 115 | |
| 116 | $body = array_intersect_key( array_merge( $request->get_body_params(), (array) $request->get_json_params() ), $declared ); |
| 117 | if ( $body ) { |
| 118 | $forwarded->set_header( 'Content-Type', 'application/json' ); |
| 119 | $forwarded->set_body( (string) wp_json_encode( $body, JSON_UNESCAPED_SLASHES ) ); |
| 120 | } |
| 121 | |
| 122 | return $forwarded; |
| 123 | } |
| 124 | } |