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libraries/cmb2/includes/rest-api/CMB2_REST_Controller.php
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| 1 | +<?php | |
| 2 | +// Exit if accessed directly | |
| 3 | +if( !defined( 'ABSPATH' ) ) exit; | |
| 4 | + | |
| 5 | +if ( ! class_exists( 'WP_REST_Controller' ) ) { | |
| 6 | + // Shim the WP_REST_Controller class if wp-api plugin not installed, & not in core. | |
| 7 | + require_once cmb2_dir( 'includes/shim/WP_REST_Controller.php' ); | |
| 8 | +} | |
| 9 | + | |
| 10 | +/** | |
| 11 | + * Creates CMB2 objects/fields endpoint for WordPress REST API. | |
| 12 | + * Allows access to fields registered to a specific post type and more. | |
| 13 | + * | |
| 14 | + * @todo Add better documentation. | |
| 15 | + * @todo Research proper schema. | |
| 16 | + * | |
| 17 | + * @since 2.2.3 | |
| 18 | + * | |
| 19 | + * @category WordPress_Plugin | |
| 20 | + * @package CMB2 | |
| 21 | + * @author CMB2 team | |
| 22 | + * @license GPL-2.0+ | |
| 23 | + * @link https://cmb2.io | |
| 24 | + */ | |
| 25 | +abstract class CMB2_REST_Controller extends WP_REST_Controller { | |
| 26 | + | |
| 27 | + /** | |
| 28 | + * The namespace of this controller's route. | |
| 29 | + * | |
| 30 | + * @var string | |
| 31 | + */ | |
| 32 | + protected $namespace = CMB2_REST::NAME_SPACE; | |
| 33 | + | |
| 34 | + /** | |
| 35 | + * The base of this controller's route. | |
| 36 | + * | |
| 37 | + * @var string | |
| 38 | + */ | |
| 39 | + protected $rest_base; | |
| 40 | + | |
| 41 | + /** | |
| 42 | + * The current request object | |
| 43 | + * | |
| 44 | + * @var WP_REST_Request $request | |
| 45 | + * @since 2.2.3 | |
| 46 | + */ | |
| 47 | + public $request; | |
| 48 | + | |
| 49 | + /** | |
| 50 | + * The current server object | |
| 51 | + * | |
| 52 | + * @var WP_REST_Server $server | |
| 53 | + * @since 2.2.3 | |
| 54 | + */ | |
| 55 | + public $server; | |
| 56 | + | |
| 57 | + /** | |
| 58 | + * Box object id | |
| 59 | + * | |
| 60 | + * @var mixed | |
| 61 | + * @since 2.2.3 | |
| 62 | + */ | |
| 63 | + public $object_id = null; | |
| 64 | + | |
| 65 | + /** | |
| 66 | + * Box object type | |
| 67 | + * | |
| 68 | + * @var string | |
| 69 | + * @since 2.2.3 | |
| 70 | + */ | |
| 71 | + public $object_type = ''; | |
| 72 | + | |
| 73 | + /** | |
| 74 | + * CMB2 Instance | |
| 75 | + * | |
| 76 | + * @var CMB2_REST | |
| 77 | + */ | |
| 78 | + protected $rest_box; | |
| 79 | + | |
| 80 | + /** | |
| 81 | + * CMB2_Field Instance | |
| 82 | + * | |
| 83 | + * @var CMB2_Field | |
| 84 | + */ | |
| 85 | + protected $field; | |
| 86 | + | |
| 87 | + /** | |
| 88 | + * The initial route | |
| 89 | + * | |
| 90 | + * @var string | |
| 91 | + * @since 2.2.3 | |
| 92 | + */ | |
| 93 | + protected static $route = ''; | |
| 94 | + | |
| 95 | + /** | |
| 96 | + * Defines which endpoint the initial request is. | |
| 97 | + * | |
| 98 | + * @var string $request_type | |
| 99 | + * @since 2.2.3 | |
| 100 | + */ | |
| 101 | + protected static $request_type = ''; | |
| 102 | + | |
| 103 | + /** | |
| 104 | + * Constructor | |
| 105 | + * | |
| 106 | + * @since 2.2.3 | |
| 107 | + */ | |
| 108 | + public function __construct( WP_REST_Server $wp_rest_server ) { | |
| 109 | + $this->server = $wp_rest_server; | |
| 110 | + } | |
| 111 | + | |
| 112 | + /** | |
| 113 | + * A wrapper for `apply_filters` which checks for box/field properties to hook to the filter. | |
| 114 | + * | |
| 115 | + * Checks if a CMB object callback property exists, and if it does, | |
| 116 | + * hook it to the permissions filter. | |
| 117 | + * | |
| 118 | + * @since 2.2.3 | |
| 119 | + * | |
| 120 | + * @param string $filter The name of the filter to apply. | |
| 121 | + * @param bool $default_access The default access for this request. | |
| 122 | + * | |
| 123 | + * @return void | |
| 124 | + */ | |
| 125 | + public function maybe_hook_callback_and_apply_filters( $filter, $default_access ) { | |
| 126 | + if ( ! $this->rest_box && $this->request->get_param( 'cmb_id' ) ) { | |
| 127 | + $this->rest_box = CMB2_REST::get_rest_box( $this->request->get_param( 'cmb_id' ) ); | |
| 128 | + } | |
| 129 | + | |
| 130 | + $default_access = $this->maybe_hook_registered_callback( $filter, $default_access ); | |
| 131 | + | |
| 132 | + /** | |
| 133 | + * Apply the permissions check filter. | |
| 134 | + * | |
| 135 | + * @since 2.2.3 | |
| 136 | + * | |
| 137 | + * @param bool $default_access Whether this CMB2 endpoint can be accessed. | |
| 138 | + * @param object $controller This CMB2_REST_Controller object. | |
| 139 | + */ | |
| 140 | + $default_access = apply_filters( $filter, $default_access, $this ); | |
| 141 | + | |
| 142 | + $this->maybe_unhook_registered_callback( $filter ); | |
| 143 | + | |
| 144 | + return $default_access; | |
| 145 | + } | |
| 146 | + | |
| 147 | + /** | |
| 148 | + * Checks if the CMB2 box has any registered callback parameters for the given filter. | |
| 149 | + * | |
| 150 | + * The registered handlers will have a property name which matches the filter, except: | |
| 151 | + * - The 'cmb2_api' prefix will be removed | |
| 152 | + * - A '_cb' suffix will be added (to stay inline with other '*_cb' parameters). | |
| 153 | + * | |
| 154 | + * @since 2.2.3 | |
| 155 | + * | |
| 156 | + * @param string $filter The filter name. | |
| 157 | + * @param bool $default_val The default filter value. | |
| 158 | + * | |
| 159 | + * @return bool The possibly-modified filter value (if the '*_cb' param is non-callable). | |
| 160 | + */ | |
| 161 | + public function maybe_hook_registered_callback( $filter, $default_val ) { | |
| 162 | + if ( ! $this->rest_box || is_wp_error( $this->rest_box ) ) { | |
| 163 | + return $default_val; | |
| 164 | + } | |
| 165 | + | |
| 166 | + // Hook box specific filter callbacks. | |
| 167 | + $val = $this->rest_box->cmb->maybe_hook_parameter( $filter, $default_val ); | |
| 168 | + if ( null !== $val ) { | |
| 169 | + $default_val = $val; | |
| 170 | + } | |
| 171 | + | |
| 172 | + return $default_val; | |
| 173 | + } | |
| 174 | + | |
| 175 | + /** | |
| 176 | + * Unhooks any CMB2 box registered callback parameters for the given filter. | |
| 177 | + * | |
| 178 | + * @since 2.2.3 | |
| 179 | + * | |
| 180 | + * @param string $filter The filter name. | |
| 181 | + * | |
| 182 | + * @return void | |
| 183 | + */ | |
| 184 | + public function maybe_unhook_registered_callback( $filter ) { | |
| 185 | + if ( ! $this->rest_box || is_wp_error( $this->rest_box ) ) { | |
| 186 | + return; | |
| 187 | + } | |
| 188 | + | |
| 189 | + // Unhook box specific filter callbacks. | |
| 190 | + $this->rest_box->cmb->maybe_hook_parameter( $filter, null, 'remove_filter' ); | |
| 191 | + } | |
| 192 | + | |
| 193 | + /** | |
| 194 | + * Prepare a CMB2 object for serialization | |
| 195 | + * | |
| 196 | + * @since 2.2.3 | |
| 197 | + * | |
| 198 | + * @param mixed $data | |
| 199 | + * @return array $data | |
| 200 | + */ | |
| 201 | + public function prepare_item( $data ) { | |
| 202 | + return $this->prepare_item_for_response( $data, $this->request ); | |
| 203 | + } | |
| 204 | + | |
| 205 | + /** | |
| 206 | + * Output buffers a callback and returns the results. | |
| 207 | + * | |
| 208 | + * @since 2.2.3 | |
| 209 | + * | |
| 210 | + * @param mixed $cb Callable function/method. | |
| 211 | + * @return mixed Results of output buffer after calling function/method. | |
| 212 | + */ | |
| 213 | + public function get_cb_results( $cb ) { | |
| 214 | + $args = func_get_args(); | |
| 215 | + array_shift( $args ); // ignore $cb | |
| 216 | + ob_start(); | |
| 217 | + call_user_func_array( $cb, $args ); | |
| 218 | + | |
| 219 | + return ob_get_clean(); | |
| 220 | + } | |
| 221 | + | |
| 222 | + /** | |
| 223 | + * Prepare the CMB2 item for the REST response. | |
| 224 | + * | |
| 225 | + * @since 2.2.3 | |
| 226 | + * | |
| 227 | + * @param mixed $item WordPress representation of the item. | |
| 228 | + * @param WP_REST_Request $request Request object. | |
| 229 | + * @return WP_REST_Response $response | |
| 230 | + */ | |
| 231 | + public function prepare_item_for_response( $data, $request = null ) { | |
| 232 | + $data = $this->filter_response_by_context( $data, $this->request['context'] ); | |
| 233 | + | |
| 234 | + /** | |
| 235 | + * Filter the prepared CMB2 item response. | |
| 236 | + * | |
| 237 | + * @since 2.2.3 | |
| 238 | + * | |
| 239 | + * @param mixed $data Prepared data | |
| 240 | + * @param object $request The WP_REST_Request object | |
| 241 | + * @param object $cmb2_endpoints This endpoints object | |
| 242 | + */ | |
| 243 | + return apply_filters( 'cmb2_rest_prepare', rest_ensure_response( $data ), $this->request, $this ); | |
| 244 | + } | |
| 245 | + | |
| 246 | + /** | |
| 247 | + * Initiates the request property and the rest_box property if box is readable. | |
| 248 | + * | |
| 249 | + * @since 2.2.3 | |
| 250 | + * | |
| 251 | + * @param WP_REST_Request $request Request object. | |
| 252 | + * @param string $request_type A description of the type of request being made. | |
| 253 | + * | |
| 254 | + * @return void | |
| 255 | + */ | |
| 256 | + protected function initiate_rest_read_box( $request, $request_type ) { | |
| 257 | + $this->initiate_rest_box( $request, $request_type ); | |
| 258 | + | |
| 259 | + if ( ! is_wp_error( $this->rest_box ) && ! $this->rest_box->rest_read ) { | |
| 260 | + $this->rest_box = new WP_Error( 'cmb2_rest_no_read_error', __( 'This box does not have read permissions.', 'cmb2' ), array( | |
| 261 | + 'status' => 403, | |
| 262 | + ) ); | |
| 263 | + } | |
| 264 | + } | |
| 265 | + | |
| 266 | + /** | |
| 267 | + * Initiates the request property and the rest_box property if box is writeable. | |
| 268 | + * | |
| 269 | + * @since 2.2.3 | |
| 270 | + * | |
| 271 | + * @param WP_REST_Request $request Request object. | |
| 272 | + * @param string $request_type A description of the type of request being made. | |
| 273 | + * | |
| 274 | + * @return void | |
| 275 | + */ | |
| 276 | + protected function initiate_rest_edit_box( $request, $request_type ) { | |
| 277 | + $this->initiate_rest_box( $request, $request_type ); | |
| 278 | + | |
| 279 | + if ( ! is_wp_error( $this->rest_box ) && ! $this->rest_box->rest_edit ) { | |
| 280 | + $this->rest_box = new WP_Error( 'cmb2_rest_no_write_error', __( 'This box does not have write permissions.', 'cmb2' ), array( | |
| 281 | + 'status' => 403, | |
| 282 | + ) ); | |
| 283 | + } | |
| 284 | + } | |
| 285 | + | |
| 286 | + /** | |
| 287 | + * Initiates the request property and the rest_box property. | |
| 288 | + * | |
| 289 | + * @since 2.2.3 | |
| 290 | + * | |
| 291 | + * @param WP_REST_Request $request Request object. | |
| 292 | + * @param string $request_type A description of the type of request being made. | |
| 293 | + * | |
| 294 | + * @return void | |
| 295 | + */ | |
| 296 | + protected function initiate_rest_box( $request, $request_type ) { | |
| 297 | + $this->initiate_request( $request, $request_type ); | |
| 298 | + | |
| 299 | + $this->rest_box = CMB2_REST::get_rest_box( $this->request->get_param( 'cmb_id' ) ); | |
| 300 | + | |
| 301 | + if ( ! $this->rest_box ) { | |
| 302 | + | |
| 303 | + $this->rest_box = new WP_Error( 'cmb2_rest_box_not_found_error', __( 'No box found by that id. A box needs to be registered with the "show_in_rest" parameter configured.', 'cmb2' ), array( | |
| 304 | + 'status' => 403, | |
| 305 | + ) ); | |
| 306 | + | |
| 307 | + } else { | |
| 308 | + | |
| 309 | + if ( isset( $this->request['object_id'] ) ) { | |
| 310 | + $this->rest_box->cmb->object_id( sanitize_text_field( $this->request['object_id'] ) ); | |
| 311 | + } | |
| 312 | + | |
| 313 | + if ( isset( $this->request['object_type'] ) ) { | |
| 314 | + $this->rest_box->cmb->object_type( sanitize_text_field( $this->request['object_type'] ) ); | |
| 315 | + } | |
| 316 | + } | |
| 317 | + } | |
| 318 | + | |
| 319 | + /** | |
| 320 | + * Initiates the request property and sets up the initial static properties. | |
| 321 | + * | |
| 322 | + * @since 2.2.3 | |
| 323 | + * | |
| 324 | + * @param WP_REST_Request $request Request object. | |
| 325 | + * @param string $request_type A description of the type of request being made. | |
| 326 | + * | |
| 327 | + * @return void | |
| 328 | + */ | |
| 329 | + public function initiate_request( $request, $request_type ) { | |
| 330 | + $this->request = $request; | |
| 331 | + | |
| 332 | + if ( ! isset( $this->request['context'] ) || empty( $this->request['context'] ) ) { | |
| 333 | + $this->request['context'] = 'view'; | |
| 334 | + } | |
| 335 | + | |
| 336 | + if ( ! self::$request_type ) { | |
| 337 | + self::$request_type = $request_type; | |
| 338 | + } | |
| 339 | + | |
| 340 | + if ( ! self::$route ) { | |
| 341 | + self::$route = $this->request->get_route(); | |
| 342 | + } | |
| 343 | + } | |
| 344 | + | |
| 345 | + /** | |
| 346 | + * Useful when getting `_embed`-ed items | |
| 347 | + * | |
| 348 | + * @since 2.2.3 | |
| 349 | + * | |
| 350 | + * @return string Initial requested type. | |
| 351 | + */ | |
| 352 | + public static function get_intial_request_type() { | |
| 353 | + return self::$request_type; | |
| 354 | + } | |
| 355 | + | |
| 356 | + /** | |
| 357 | + * Useful when getting `_embed`-ed items | |
| 358 | + * | |
| 359 | + * @since 2.2.3 | |
| 360 | + * | |
| 361 | + * @return string Initial requested route. | |
| 362 | + */ | |
| 363 | + public static function get_intial_route() { | |
| 364 | + return self::$route; | |
| 365 | + } | |
| 366 | + | |
| 367 | + /** | |
| 368 | + * Get CMB2 fields schema, conforming to JSON Schema | |
| 369 | + * | |
| 370 | + * @since 2.2.3 | |
| 371 | + * | |
| 372 | + * @return array | |
| 373 | + */ | |
| 374 | + public function get_item_schema() { | |
| 375 | + $schema = array( | |
| 376 | + '$schema' => 'http://json-schema.org/draft-04/schema#', | |
| 377 | + 'title' => 'CMB2', | |
| 378 | + 'type' => 'object', | |
| 379 | + 'properties' => array( | |
| 380 | + 'description' => array( | |
| 381 | + 'description' => __( 'A human-readable description of the object.', 'cmb2' ), | |
| 382 | + 'type' => 'string', | |
| 383 | + 'context' => array( | |
| 384 | + 'view', | |
| 385 | + ), | |
| 386 | + ), | |
| 387 | + 'name' => array( | |
| 388 | + 'description' => __( 'The id for the object.', 'cmb2' ), | |
| 389 | + 'type' => 'integer', | |
| 390 | + 'context' => array( | |
| 391 | + 'view', | |
| 392 | + ), | |
| 393 | + ), | |
| 394 | + 'name' => array( | |
| 395 | + 'description' => __( 'The title for the object.', 'cmb2' ), | |
| 396 | + 'type' => 'string', | |
| 397 | + 'context' => array( | |
| 398 | + 'view', | |
| 399 | + ), | |
| 400 | + ), | |
| 401 | + ), | |
| 402 | + ); | |
| 403 | + | |
| 404 | + return $this->add_additional_fields_schema( $schema ); | |
| 405 | + } | |
| 406 | + | |
| 407 | + /** | |
| 408 | + * Return an array of contextual links for endpoint/object | |
| 409 | + * | |
| 410 | + * @link http://v2.wp-api.org/extending/linking/ | |
| 411 | + * @link http://www.iana.org/assignments/link-relations/link-relations.xhtml | |
| 412 | + * | |
| 413 | + * @since 2.2.3 | |
| 414 | + * | |
| 415 | + * @param mixed $object Object to build links from. | |
| 416 | + * | |
| 417 | + * @return array Array of links | |
| 418 | + */ | |
| 419 | + abstract protected function prepare_links( $object ); | |
| 420 | + | |
| 421 | + /** | |
| 422 | + * Get whitelisted query strings from URL for appending to link URLS. | |
| 423 | + * | |
| 424 | + * @since 2.2.3 | |
| 425 | + * | |
| 426 | + * @return string URL query stringl | |
| 427 | + */ | |
| 428 | + public function get_query_string() { | |
| 429 | + $defaults = array( | |
| 430 | + 'object_id' => 0, | |
| 431 | + 'object_type' => '', | |
| 432 | + '_rendered' => '', | |
| 433 | + // '_embed' => '', | |
| 434 | + ); | |
| 435 | + | |
| 436 | + $query_string = ''; | |
| 437 | + | |
| 438 | + foreach ( $defaults as $key => $value ) { | |
| 439 | + if ( isset( $this->request[ $key ] ) ) { | |
| 440 | + $query_string .= $query_string ? '&' : '?'; | |
| 441 | + $query_string .= $key; | |
| 442 | + if ( $value = sanitize_text_field( $this->request[ $key ] ) ) { | |
| 443 | + $query_string .= '=' . $value; | |
| 444 | + } | |
| 445 | + } | |
| 446 | + } | |
| 447 | + | |
| 448 | + return $query_string; | |
| 449 | + } | |
| 450 | + | |
| 451 | +} | |