<?php

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/**

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* Rest API: Layout Block

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*

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* @package Divi

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*/

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if ( ! defined( 'ABSPATH' ) ) {

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exit; // Exit if accessed directly.

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}

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/**

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* Class for custom REST API endpoint for Divi Layout block.

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*/

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class ET_Api_Rest_Block_Layout {

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/**

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* Instance of `ET_Api_Rest_Block_Layout`.

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*

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* @var ET_Api_Rest_Block_Layout

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*/

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private static $_instance;

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/**

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* Constructor.

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*

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* ET_Api_Rest_Block_Layout constructor.

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*/

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public function __construct() {

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$this->register();

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}

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/**

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* Get class instance

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*

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* @since 4.1.0

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*

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* @return object class instance

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*/

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public static function instance() {

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if ( null === self::$_instance ) {

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self::$_instance = new self();

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}

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return self::$_instance;

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}

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/**

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* Register callback for Layout block REST API

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*

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* @since 4.1.0

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*/

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public function register() {

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add_action( 'rest_api_init', array( $this, 'register_routes' ) );

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}

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/**

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* Register REST API routes for Layout block

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*

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* @since 4.1.0

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*/

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public function register_routes() {

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register_rest_route(

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'divi/v1',

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'get_layout_content',

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array(

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'methods' => 'POST',

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'callback' => array( $this, 'get_layout_content_callback' ),

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'args' => array(

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'id' => array(

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// using intval directly doesn't work, hence the custom callback.

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'sanitize_callback' => array( $this, 'sanitize_int' ),

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'validation_callback' => 'is_numeric',

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),

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'nonce' => array(

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'sanitize_callback' => 'sanitize_text_field',

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),

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),

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'permission_callback' => array( $this, 'rest_api_layout_block_permission' ),

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)

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);

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register_rest_route(

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'divi/v1',

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'block/layout/builder_edit_data',

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array(

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'methods' => 'POST',

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'callback' => array( $this, 'process_builder_edit_data' ),

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'args' => array(

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'action' => array(

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'sanitize_callback' => array( $this, 'sanitize_action' ), // update|delete|get.

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'validation_callback' => array( $this, 'validate_action' ),

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),

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'postId' => array(

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'sanitize_callback' => array( $this, 'sanitize_int' ),

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'validation_callback' => 'is_numeric',

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),

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'blockId' => array(

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'sanitize_callback' => 'sanitize_title',

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),

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'layoutContent' => array(

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'sanitize_callback' => 'wp_kses_post',

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),

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'nonce' => array(

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'sanitize_callback' => 'sanitize_text_field',

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),

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),

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'permission_callback' => array( $this, 'rest_api_layout_block_permission' ),

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)

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);

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}

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/**

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* Get layout content based on given post ID

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*

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* @since 4.1.0

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*

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* @param WP_REST_Request $request Full details about the request.

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*

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* @return string|WP_Error

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*/

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public function get_layout_content_callback( WP_REST_Request $request ) {

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$post_id = $request->get_param( 'id' );

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$nonce = $request->get_param( 'nonce' );

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// Action nonce check. REST API actually has checked for nonce at cookie sent on every

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// request and performed capability-based check. This check perform action-based nonce

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// check to strengthen the security

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// @see https://developer.wordpress.org/rest-api/using-the-rest-api/authentication/.

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if ( ! wp_verify_nonce( $nonce, 'et_rest_get_layout_content' ) ) {

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return new WP_Error(

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'invalid_nonce',

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esc_html__( 'Invalid nonce', 'et_builder' ),

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array(

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'status' => 400,

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)

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);

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}

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// request has to have id param.

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if ( ! $post_id ) {

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return new WP_Error(

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'no_layout_id',

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esc_html__( 'No layout id found', 'et_builder' ),

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array(

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'status' => 400,

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)

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);

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}

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$post = get_post( $post_id );

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if ( ! isset( $post->post_content ) || ! $post->post_content ) {

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return new WP_Error(

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'no_layout_found',

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esc_html__( 'No valid layout content found.', 'et_builder' ),

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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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return $post->post_content;

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}

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/**

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* Process /block/layout/builder_edit_data route request

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*

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* @param WP_Rest_Request $request Request to prepare items for.

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*

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* @return string|WP_Error

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* @since 4.1.0

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*/

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public function process_builder_edit_data( WP_Rest_Request $request ) {

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$post_id = $request->get_param( 'postId' );

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$block_id = $request->get_param( 'blockId' );

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$nonce = $request->get_param( 'nonce' );

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// No post ID.

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if ( empty( $post_id ) ) {

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return new WP_Error(

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'no_post_id',

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esc_html__( 'No post id', 'et_builder' ),

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array(

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'status' => 400,

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)

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);

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}

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// No block ID.

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if ( empty( $block_id ) ) {

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return new WP_Error(

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'no_block_id',

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esc_html__( 'No block id', 'et_builder' ),

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array(

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'status' => 400,

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)

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);

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}

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// Action nonce check. REST API actually has checked for nonce at cookie sent on every

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// request and performed capability-based check. This check perform action-based nonce

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// check to strengthen the security

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// @see https://developer.wordpress.org/rest-api/using-the-rest-api/authentication/.

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if ( ! wp_verify_nonce( $nonce, 'et_rest_process_builder_edit_data' ) ) {

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return new WP_Error(

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'invalid_nonce',

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esc_html__( 'Invalid nonce', 'et_builder' ),

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array(

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'status' => 400,

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)

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);

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}

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$result = '';

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$post_meta_key = "_et_block_layout_preview_{$block_id}";

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switch ( $request->get_param( 'action' ) ) {

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case 'get':

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$result = get_post_meta( $post_id, $post_meta_key, true );

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break;

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case 'update':

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$layout_content = $request->get_param( 'layoutContent' );

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// No layout content.

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if ( empty( $layout_content ) ) {

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return new WP_Error(

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'no_layout_content',

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esc_html__( 'No layout content', 'et_builder' ),

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array(

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'status' => 400,

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)

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);

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}

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$saved_layout_content = get_post_meta( $post_id, $post_meta_key, true );

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if ( ! empty( $saved_layout_content ) && $saved_layout_content === $layout_content ) {

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// If for some reason layout exist and identical to the one being sent, return

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// true because update_post_meta() returns false if it updates the meta key and

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// the value doesn't change.

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$result = true;

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} else {

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// Otherwise, attempt to save post meta and returns how it goes.

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$result = update_post_meta(

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$post_id,

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$post_meta_key,

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$layout_content

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);

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}

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break;

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case 'delete':

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$result = delete_post_meta( $post_id, $post_meta_key );

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break;

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default:

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return new WP_Error(

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'no_valid_action',

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esc_html__( 'No valid action found', 'et_builder' ),

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array(

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'status' => 400,

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)

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);

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}

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return array(

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'result' => $result,

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);

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}

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/**

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* Sanitize int value

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*

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* @since 4.1.0

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*

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* @param int|mixed $value Value.

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*

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* @return int

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*/

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public function sanitize_int( $value ) {

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return intval( $value );

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}

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/**

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* Sanitize request "action" argument

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*

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* @since 4.1.0

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*

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* @param string $value Action value.

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*

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* @return string

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*/

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public function sanitize_action( $value ) {

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return $this->validate_action( $value ) ? $value : '';

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}

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/**

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* Validate request "action" argument

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*

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* @since 4.1.0

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*

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* @param string $value Action value.

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*

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* @return bool

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*/

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public function validate_action( $value ) {

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$valid_builder_edit_data_actions = array(

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'get',

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'update',

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'delete',

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);

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return in_array( $value, $valid_builder_edit_data_actions, true );

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}

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/**

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* Permission callback for get layout permalink REST API endpoint

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*

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* @since 4.1.0

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*

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* @return bool

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*/

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public function rest_api_layout_block_permission() {

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return current_user_can( 'edit_posts' ) && et_pb_is_allowed( 'use_visual_builder' );

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}

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}

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// Initialize ET_Api_Rest_Block_Layout.

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ET_Api_Rest_Block_Layout::instance();

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