hema = $this->get_item_schema(); return rest_filter_response_by_context( $response_data, $schema, $context ); } /** * Retrieves the item's schema, conforming to JSON Schema. * * @since 4.7.0 * * @return array Item schema data. */ public function get_item_schema() { return $this->add_additional_fields_schema( array() ); } /** * Retrieves the item's schema for display / public consumption purposes. * * @since 4.7.0 * * @return array Public item schema data. */ public function get_public_item_schema() { $schema = $this->get_item_schema(); if ( ! empty( $schema['properties'] ) ) { foreach ( $schema['properties'] as &$property ) { unset( $property['arg_options'] ); } } return $schema; } /** * Retrieves the query params for the collections. * * @since 4.7.0 * * @return array Query parameters for the collection. */ public function get_collection_params() { return array( 'context' => $this->get_context_param(), 'page' => array( 'description' => __( 'Current page of the collection.' ), 'type' => 'integer', 'default' => 1, 'sanitize_callback' => 'absint', 'validate_callback' => 'rest_validate_request_arg', 'minimum' => 1, ), 'per_page' => array( 'description' => __( 'Maximum number of items to be returned in result set.' ), 'type' => 'integer', 'default' => 10, 'minimum' => 1, 'maximum' => 100, 'sanitize_callback' => 'absint', 'validate_callback' => 'rest_validate_request_arg', ), 'search' => array( 'description' => __( 'Limit results to those matching a string.' ), 'type' => 'string', 'sanitize_callback' => 'sanitize_text_field', 'validate_callback' => 'rest_validate_request_arg', ), ); } /** * Retrieves the magical context param. * * Ensures consistent descriptions between endpoints, and populates enum from schema. * * @since 4.7.0 * * @param array $args Optional. Additional arguments for context parameter. Default empty array. * @return array Context parameter details. */ public function get_context_param( $args = array() ) { $param_details = array( 'description' => __( 'Scope under which the request is made; determines fields present in response.' ), 'type' => 'string', 'sanitize_callback' => 'sanitize_key', 'validate_callback' => 'rest_validate_request_arg', ); $schema = $this->get_item_schema(); if ( empty( $schema['properties'] ) ) { return array_merge( $param_details, $args ); } $contexts = array(); foreach ( $schema['properties'] as $attributes ) { if ( ! empty( $attributes['context'] ) ) { $contexts = array_merge( $contexts, $attributes['context'] ); } } if ( ! empty( $contexts ) ) { $param_details['enum'] = array_unique( $contexts ); rsort( $param_details['enum'] ); } return array_merge( $param_details, $args ); } /** * Adds the values from additional fields to a data object. * * @since 4.7.0 * * @param array $response_data Prepared response array. * @param WP_REST_Request $request Full details about the request. * @return array Modified data object with additional fields. */ protected function add_additional_fields_to_object( $response_data, $request ) { $additional_fields = $this->get_additional_fields(); $requested_fields = $this->get_fields_for_response( $request ); foreach ( $additional_fields as $field_name => $field_options ) { if ( ! $field_options['get_callback'] ) { continue; } if ( ! rest_is_field_included( $field_name, $requested_fields ) ) { continue; } $response_data[ $field_name ] = call_user_func( $field_options['get_callback'], $response_data, $field_name, $request, $this->get_object_type() ); } return $response_data; } /** * Updates the values of additional fields added to a data object. * * @since 4.7.0 * * @param object $data_object Data model like WP_Term or WP_Post. * @param WP_REST_Request $request Full details about the request. * @return true|WP_Error True on success, WP_Error object if a field cannot be updated. */ protected function update_additional_fields_for_object( $data_object, $request ) { $additional_fields = $this->get_additional_fields(); foreach ( $additional_fields as $field_name => $field_options ) { if ( ! $field_options['update_callback'] ) { continue; } // Don't run the update callbacks if the data wasn't passed in the request. if ( ! isset( $request[ $field_name ] ) ) { continue; } $result = call_user_func( $field_options['update_callback'], $request[ $field_name ], $data_object, $field_name, $request, $this->get_object_type() ); if ( is_wp_error( $result ) ) { return $result; } } return true; } /** * Adds the schema from additional fields to a schema array. * * The type of object is inferred from the passed schema. * * @since 4.7.0 * * @param array $schema Schema array. * @return array Modified Schema array. */ protected function add_additional_fields_schema( $schema ) { if ( empty( $schema['title'] ) ) { return $schema; } // Can't use $this->get_object_type otherwise we cause an inf loop. $object_type = $schema['title']; $additional_fields = $this->get_additional_fields( $object_type ); foreach ( $additional_fields as $field_name => $field_options ) { if ( ! $field_options['schema'] ) { continue; } $schema['properties'][ $field_name ] = $field_options['schema']; } return $schema; } /** * Retrieves all of the registered additional fields for a given object-type. * * @since 4.7.0 * * @global array $wp_rest_additional_fields Holds registered fields, organized by object type. * * @param string $object_type Optional. The object type. * @return array Registered additional fields (if any), empty array if none or if the object type * could not be inferred. */ protected function get_additional_fields( $object_type = null ) { global $wp_rest_additional_fields; if ( ! $object_type ) { $object_type = $this->get_object_type(); } if ( ! $object_type ) { return array(); } if ( ! $wp_rest_additional_fields || ! isset( $wp_rest_additional_fields[ $object_type ] ) ) { return array(); } return $wp_rest_additional_fields[ $object_type ]; } /** * Retrieves the object type this controller is responsible for managing. * * @since 4.7.0 * * @return string Object type for the controller. */ protected function get_object_type() { $schema = $this->get_item_schema(); if ( ! $schema || ! isset( $schema['title'] ) ) { return null; } return $schema['title']; } /** * Gets an array of fields to be included on the response. * * Included fields are based on item schema and `_fields=` request argument. * * @since 4.9.6 * * @param WP_REST_Request $request Full details about the request. * @return string[] Fields to be included in the response. */ public function get_fields_for_response( $request ) { $schema = $this->get_item_schema(); $properties = isset( $schema['properties'] ) ? $schema['properties'] : array(); $additional_fields = $this->get_additional_fields(); foreach ( $additional_fields as $field_name => $field_options ) { /* * For back-compat, include any field with an empty schema * because it won't be present in $this->get_item_schema(). */ if ( is_null( $field_options['schema'] ) ) { $properties[ $field_name ] = $field_options; } } // Exclude fields that specify a different context than the request context. $context = $request['context']; if ( $context ) { foreach ( $properties as $name => $options ) { if ( ! empty( $options['context'] ) && ! in_array( $context, $options['context'], true ) ) { unset( $properties[ $name ] ); } } } $fields = array_keys( $properties ); /* * '_links' and '_embedded' are not typically part of the item schema, * but they can be specified in '_fields', so they are added here as a * convenience for checking with rest_is_field_included(). */ $fields[] = '_links'; if ( $request->has_param( '_embed' ) ) { $fields[] = '_embedded'; } $fields = array_unique( $fields ); if ( ! isset( $request['_fields'] ) ) { return $fields; } $requested_fields = wp_parse_list( $request['_fields'] ); if ( 0 === count( $requested_fields ) ) { return $fields; } // Trim off outside whitespace from the comma delimited list. $requested_fields = array_map( 'trim', $requested_fields ); // Always persist 'id', because it can be needed for add_additional_fields_to_object(). if ( in_array( 'id', $fields, true ) ) { $requested_fields[] = 'id'; } // Return the list of all requested fields which appear in the schema. return array_reduce( $requested_fields, static function ( $response_fields, $field ) use ( $fields ) { if ( in_array( $field, $fields, true ) ) { $response_fields[] = $field; return $response_fields; } // Check for nested fields if $field is not a direct match. $nested_fields = explode( '.', $field ); /* * A nested field is included so long as its top-level property * is present in the schema. */ if ( in_array( $nested_fields[0], $fields, true ) ) { $response_fields[] = $field; } return $response_fields; }, array() ); } /** * Retrieves an array of endpoint arguments from the item schema for the controller. * * @since 4.7.0 * * @param string $method Optional. HTTP method of the request. The arguments for `CREATABLE` requests are * checked for required values and may fall-back to a given default, this is not done * on `EDITABLE` requests. Default WP_REST_Server::CREATABLE. * @return array Endpoint arguments. */ public function get_endpoint_args_for_item_schema( $method = WP_REST_Server::CREATABLE ) { return rest_get_endpoint_args_for_schema( $this->get_item_schema(), $method ); } /** * Sanitizes the slug value. * * @since 4.7.0 * * @internal We can't use sanitize_title() directly, as the second * parameter is the fallback title, which would end up being set to the * request object. * * @see https://github.com/WP-API/WP-API/issues/1585 * * @todo Remove this in favour of https://core.trac.wordpress.org/ticket/34659 * * @param string $slug Slug value passed in request. * @return string Sanitized value for the slug. */ public function sanitize_slug( $slug ) { return sanitize_title( $slug ); } }