184 lines
4.5 KiB
PHP
184 lines
4.5 KiB
PHP
<?php
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/**
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* Block Renderer REST API: WP_REST_Block_Renderer_Controller class
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*
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* @package WordPress
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* @subpackage REST_API
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* @since 5.0.0
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*/
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/**
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* Controller which provides REST endpoint for rendering a block.
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*
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* @since 5.0.0
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*
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* @see WP_REST_Controller
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*/
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class WP_REST_Block_Renderer_Controller extends WP_REST_Controller {
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/**
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* Constructs the controller.
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*
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* @since 5.0.0
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*/
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public function __construct() {
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$this->namespace = 'wp/v2';
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$this->rest_base = 'block-renderer';
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}
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/**
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* Registers the necessary REST API routes, one for each dynamic block.
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*
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* @since 5.0.0
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*/
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public function register_routes() {
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$block_types = WP_Block_Type_Registry::get_instance()->get_all_registered();
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foreach ( $block_types as $block_type ) {
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if ( ! $block_type->is_dynamic() ) {
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continue;
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}
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register_rest_route(
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$this->namespace,
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'/' . $this->rest_base . '/(?P<name>' . $block_type->name . ')',
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array(
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'args' => array(
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'name' => array(
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'description' => __( 'Unique registered name for the block.' ),
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'type' => 'string',
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),
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),
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array(
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'methods' => WP_REST_Server::READABLE,
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'callback' => array( $this, 'get_item' ),
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'permission_callback' => array( $this, 'get_item_permissions_check' ),
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'args' => array(
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'context' => $this->get_context_param( array( 'default' => 'view' ) ),
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'attributes' => array(
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/* translators: %s is the name of the block */
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'description' => sprintf( __( 'Attributes for %s block' ), $block_type->name ),
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'type' => 'object',
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'additionalProperties' => false,
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'properties' => $block_type->get_attributes(),
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'default' => array(),
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),
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'post_id' => array(
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'description' => __( 'ID of the post context.' ),
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'type' => 'integer',
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),
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),
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),
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'schema' => array( $this, 'get_public_item_schema' ),
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)
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);
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}
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}
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/**
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* Checks if a given request has access to read blocks.
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*
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* @since 5.0.0
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*
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* @param WP_REST_Request $request Request.
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* @return true|WP_Error True if the request has read access, WP_Error object otherwise.
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*/
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public function get_item_permissions_check( $request ) {
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global $post;
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$post_id = isset( $request['post_id'] ) ? intval( $request['post_id'] ) : 0;
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if ( 0 < $post_id ) {
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$post = get_post( $post_id );
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if ( ! $post || ! current_user_can( 'edit_post', $post->ID ) ) {
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return new WP_Error(
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'block_cannot_read',
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__( 'Sorry, you are not allowed to read blocks of this post.' ),
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array(
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'status' => rest_authorization_required_code(),
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)
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);
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}
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} else {
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if ( ! current_user_can( 'edit_posts' ) ) {
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return new WP_Error(
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'block_cannot_read',
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__( 'Sorry, you are not allowed to read blocks as this user.' ),
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array(
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'status' => rest_authorization_required_code(),
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)
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);
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}
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}
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return true;
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}
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/**
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* Returns block output from block's registered render_callback.
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*
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* @since 5.0.0
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*
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* @param WP_REST_Request $request Full details about the request.
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* @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
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*/
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public function get_item( $request ) {
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global $post;
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$post_id = isset( $request['post_id'] ) ? intval( $request['post_id'] ) : 0;
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if ( 0 < $post_id ) {
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$post = get_post( $post_id );
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// Set up postdata since this will be needed if post_id was set.
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setup_postdata( $post );
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}
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$registry = WP_Block_Type_Registry::get_instance();
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$block = $registry->get_registered( $request['name'] );
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if ( null === $block ) {
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return new WP_Error(
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'block_invalid',
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__( 'Invalid block.' ),
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array(
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'status' => 404,
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)
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);
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}
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$data = array(
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'rendered' => $block->render( $request->get_param( 'attributes' ) ),
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);
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return rest_ensure_response( $data );
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}
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/**
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* Retrieves block's output schema, conforming to JSON Schema.
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*
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* @since 5.0.0
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*
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* @return array Item schema data.
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*/
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public function get_item_schema() {
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if ( $this->schema ) {
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return $this->schema;
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}
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$this->schema = array(
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'$schema' => 'http://json-schema.org/schema#',
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'title' => 'rendered-block',
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'type' => 'object',
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'properties' => array(
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'rendered' => array(
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'description' => __( 'The rendered block.' ),
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'type' => 'string',
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'required' => true,
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'context' => array( 'edit' ),
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),
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),
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);
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return $this->schema;
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}
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}
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