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📄 CMB2_REST.php(22.96 KB)
📄 CMB2_REST_Controller.php(10.93 KB)
📄 CMB2_REST_Controller_Boxes.php(7.48 KB)
📄 CMB2_REST_Controller_Fields.php(15.97 KB)

Editing: CMB2_REST_Controller.php

<?php
if ( ! class_exists( 'WP_REST_Controller' ) ) {
	// Shim the WP_REST_Controller class if wp-api plugin not installed, & not in core.
	require_once cmb2_dir( 'includes/shim/WP_REST_Controller.php' );
}

/**
 * Creates CMB2 objects/fields endpoint for WordPres REST API.
 * Allows access to fields registered to a specific post type and more.
 *
 * @todo  Add better documentation.
 * @todo  Research proper schema.
 *
 * @since 2.2.3
 *
 * @category  WordPress_Plugin
 * @package   CMB2
 * @author    CMB2 team
 * @license   GPL-2.0+
 * @link      https://cmb2.io
 */

/* phpcs:ignoreFile */

abstract class CMB2_REST_Controller extends WP_REST_Controller {

/**
	 * The namespace of this controller's route.
	 *
	 * @var string
	 */
	protected $namespace = CMB2_REST::NAME_SPACE;

/**
	 * The base of this controller's route.
	 *
	 * @var string
	 */
	protected $rest_base;

/**
	 * The current request object
	 *
	 * @var WP_REST_Request $request
	 * @since 2.2.3
	 */
	public $request;

/**
	 * The current server object
	 *
	 * @var WP_REST_Server $server
	 * @since 2.2.3
	 */
	public $server;

/**
	 * Box object id
	 *
	 * @var   mixed
	 * @since 2.2.3
	 */
	public $object_id = null;

/**
	 * Box object type
	 *
	 * @var   string
	 * @since 2.2.3
	 */
	public $object_type = '';

/**
	 * CMB2 Instance
	 *
	 * @var CMB2_REST
	 */
	protected $rest_box;

/**
	 * CMB2_Field Instance
	 *
	 * @var CMB2_Field
	 */
	protected $field;

/**
	 * The initial route
	 *
	 * @var   string
	 * @since 2.2.3
	 */
	protected static $route = '';

/**
	 * Defines which endpoint the initial request is.
	 *
	 * @var string $request_type
	 * @since 2.2.3
	 */
	protected static $request_type = '';

/**
	 * Constructor
	 *
	 * @since 2.2.3
	 */
	public function __construct( WP_REST_Server $wp_rest_server ) {
		$this->server = $wp_rest_server;
	}

/**
	 * A wrapper for `apply_filters` which checks for box/field properties to hook to the filter.
	 *
	 * Checks if a CMB object callback property exists, and if it does,
	 * hook it to the permissions filter.
	 *
	 * @since  2.2.3
	 *
	 * @param  string $filter         The name of the filter to apply.
	 * @param  bool   $default_access The default access for this request.
	 *
	 * @return void
	 */
	public function maybe_hook_callback_and_apply_filters( $filter, $default_access ) {
		if ( ! $this->rest_box && $this->request->get_param( 'cmb_id' ) ) {
			$this->rest_box = CMB2_REST::get_rest_box( $this->request->get_param( 'cmb_id' ) );
		}

$default_access = $this->maybe_hook_registered_callback( $filter, $default_access );

/**
		 * Apply the permissions check filter.
		 *
		 * @since 2.2.3
		 *
		 * @param bool   $default_access Whether this CMB2 endpoint can be accessed.
		 * @param object $controller     This CMB2_REST_Controller object.
		 */
		$default_access = apply_filters( $filter, $default_access, $this );

$this->maybe_unhook_registered_callback( $filter );

return $default_access;
	}

/**
	 * Checks if the CMB2 box has any registered callback parameters for the given filter.
	 *
	 * The registered handlers will have a property name which matches the filter, except:
	 * - The 'cmb2_api' prefix will be removed
	 * - A '_cb' suffix will be added (to stay inline with other '*_cb' parameters).
	 *
	 * @since  2.2.3
	 *
	 * @param  string $filter      The filter name.
	 * @param  bool   $default_val The default filter value.
	 *
	 * @return bool                The possibly-modified filter value (if the '*_cb' param is non-callable).
	 */
	public function maybe_hook_registered_callback( $filter, $default_val ) {
		if ( ! $this->rest_box || is_wp_error( $this->rest_box ) ) {
			return $default_val;
		}

// Hook box specific filter callbacks.
		$val = $this->rest_box->cmb->maybe_hook_parameter( $filter, $default_val );
		if ( null !== $val ) {
			$default_val = $val;
		}

return $default_val;
	}

/**
	 * Unhooks any CMB2 box registered callback parameters for the given filter.
	 *
	 * @since  2.2.3
	 *
	 * @param  string $filter The filter name.
	 *
	 * @return void
	 */
	public function maybe_unhook_registered_callback( $filter ) {
		if ( ! $this->rest_box || is_wp_error( $this->rest_box ) ) {
			return;
		}

// Unhook box specific filter callbacks.
		$this->rest_box->cmb->maybe_hook_parameter( $filter, null, 'remove_filter' );
	}

/**
	 * Prepare a CMB2 object for serialization
	 *
	 * @since 2.2.3
	 *
	 * @param  mixed $data
	 * @return array $data
	 */
	public function prepare_item( $data ) {
		return $this->prepare_item_for_response( $data, $this->request );
	}

/**
	 * Output buffers a callback and returns the results.
	 *
	 * @since  2.2.3
	 *
	 * @param  mixed $cb Callable function/method.
	 * @return mixed     Results of output buffer after calling function/method.
	 */
	public function get_cb_results( $cb ) {
		$args = func_get_args();
		array_shift( $args ); // ignore $cb
		ob_start();
		call_user_func_array( $cb, $args );

return ob_get_clean();
	}

/**
	 * Prepare the CMB2 item for the REST response.
	 *
	 * @since 2.2.3
	 *
	 * @param  mixed           $item     WordPress representation of the item.
	 * @param  WP_REST_Request $request  Request object.
	 * @return WP_REST_Response $response
	 */
	public function prepare_item_for_response( $data, $request = null ) {
		$data = $this->filter_response_by_context( $data, $this->request['context'] );

/**
		 * Filter the prepared CMB2 item response.
		 *
		 * @since 2.2.3
		 *
		 * @param mixed  $data           Prepared data
		 * @param object $request        The WP_REST_Request object
		 * @param object $cmb2_endpoints This endpoints object
		 */
		return apply_filters( 'cmb2_rest_prepare', rest_ensure_response( $data ), $this->request, $this );
	}

/**
	 * Initiates the request property and the rest_box property if box is readable.
	 *
	 * @since  2.2.3
	 *
	 * @param  WP_REST_Request $request      Request object.
	 * @param  string          $request_type A description of the type of request being made.
	 *
	 * @return void
	 */
	protected function initiate_rest_read_box( $request, $request_type ) {
		$this->initiate_rest_box( $request, $request_type );

if ( ! is_wp_error( $this->rest_box ) && ! $this->rest_box->rest_read ) {
			$this->rest_box = new WP_Error( 'cmb2_rest_no_read_error', __( 'This box does not have read permissions.', 'cmb2' ), array(
				'status' => 403,
			) );
		}
	}

/**
	 * Initiates the request property and the rest_box property if box is writeable.
	 *
	 * @since  2.2.3
	 *
	 * @param  WP_REST_Request $request      Request object.
	 * @param  string          $request_type A description of the type of request being made.
	 *
	 * @return void
	 */
	protected function initiate_rest_edit_box( $request, $request_type ) {
		$this->initiate_rest_box( $request, $request_type );

if ( ! is_wp_error( $this->rest_box ) && ! $this->rest_box->rest_edit ) {
			$this->rest_box = new WP_Error( 'cmb2_rest_no_write_error', __( 'This box does not have write permissions.', 'cmb2' ), array(
				'status' => 403,
			) );
		}
	}

/**
	 * Initiates the request property and the rest_box property.
	 *
	 * @since  2.2.3
	 *
	 * @param  WP_REST_Request $request      Request object.
	 * @param  string          $request_type A description of the type of request being made.
	 *
	 * @return void
	 */
	protected function initiate_rest_box( $request, $request_type ) {
		$this->initiate_request( $request, $request_type );

$this->rest_box = CMB2_REST::get_rest_box( $this->request->get_param( 'cmb_id' ) );

if ( ! $this->rest_box ) {

$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(
				'status' => 403,
			) );

} else {

if ( isset( $this->request['object_id'] ) ) {
				$this->rest_box->cmb->object_id( sanitize_text_field( $this->request['object_id'] ) );
			}

if ( isset( $this->request['object_type'] ) ) {
				$this->rest_box->cmb->object_type( sanitize_text_field( $this->request['object_type'] ) );
			}
		}
	}

/**
	 * Initiates the request property and sets up the initial static properties.
	 *
	 * @since  2.2.3
	 *
	 * @param  WP_REST_Request $request      Request object.
	 * @param  string          $request_type A description of the type of request being made.
	 *
	 * @return void
	 */
	public function initiate_request( $request, $request_type ) {
		$this->request = $request;

if ( ! isset( $this->request['context'] ) || empty( $this->request['context'] ) ) {
			$this->request['context'] = 'view';
		}

if ( ! self::$request_type ) {
			self::$request_type = $request_type;
		}

if ( ! self::$route ) {
			self::$route = $this->request->get_route();
		}
	}

/**
	 * Useful when getting `_embed`-ed items
	 *
	 * @since  2.2.3
	 *
	 * @return string  Initial requested type.
	 */
	public static function get_intial_request_type() {
		return self::$request_type;
	}

/**
	 * Useful when getting `_embed`-ed items
	 *
	 * @since  2.2.3
	 *
	 * @return string  Initial requested route.
	 */
	public static function get_intial_route() {
		return self::$route;
	}

/**
	 * Get CMB2 fields schema, conforming to JSON Schema
	 *
	 * @since 2.2.3
	 *
	 * @return array
	 */
	public function get_item_schema() {
		$schema = array(
			'$schema'              => 'http://json-schema.org/draft-04/schema#',
			'title'                => 'CMB2',
			'type'                 => 'object',
			'properties'           => array(
				'description' => array(
					'description' => __( 'A human-readable description of the object.', 'cmb2' ),
					'type'        => 'string',
					'context'     => array(
						'view',
					),
				),
				'name' => array(
					'description' => __( 'The id for the object.', 'cmb2' ),
					'type'        => 'integer',
					'context'     => array(
						'view',
					),
				),
				'name' => array(
					'description' => __( 'The title for the object.', 'cmb2' ),
					'type'        => 'string',
					'context'     => array(
						'view',
					),
				),
			),
		);

return $this->add_additional_fields_schema( $schema );
	}

/**
	 * Return an array of contextual links for endpoint/object
	 *
	 * @link http://v2.wp-api.org/extending/linking/
	 * @link http://www.iana.org/assignments/link-relations/link-relations.xhtml
	 *
	 * @since  2.2.3
	 *
	 * @param  mixed $object Object to build links from.
	 *
	 * @return array          Array of links
	 */
	abstract protected function prepare_links( $object );

/**
	 * Get whitelisted query strings from URL for appending to link URLS.
	 *
	 * @since  2.2.3
	 *
	 * @return string URL query stringl
	 */
	public function get_query_string() {
		$defaults = array(
			'object_id'   => 0,
			'object_type' => '',
			'_rendered'   => '',
			// '_embed'      => '',
		);

$query_string = '';

foreach ( $defaults as $key => $value ) {
			if ( isset( $this->request[ $key ] ) ) {
				$query_string .= $query_string ? '&' : '?';
				$query_string .= $key;
				if ( $value = sanitize_text_field( $this->request[ $key ] ) ) {
					$query_string .= '=' . $value;
				}
			}
		}

return $query_string;
	}

}

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