94 lines
2.4 KiB
PHP
94 lines
2.4 KiB
PHP
<?php
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// Exit if accessed directly.
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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// If class is already defined, return.
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if ( class_exists( 'ACF_Rest_Api' ) ) {
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return;
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}
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/**
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* Class ACF_Rest_Embed_Links
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*
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* Manage the addition of embed links on supported REST endpoints.
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*/
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class ACF_Rest_Embed_Links {
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/** @var array Links to add to the response. These can be flagged as embeddable and expanded when _embed is passed with the request. */
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private $links = array();
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public function initialize() {
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$this->hook_link_handlers();
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}
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/**
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* Hook into all REST-enabled post type, taxonomy, and the user controllers in order to prepare links.
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*/
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private function hook_link_handlers() {
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foreach ( get_post_types( array( 'show_in_rest' => true ) ) as $post_type ) {
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add_filter( "rest_prepare_{$post_type}", array( $this, 'load_item_links' ), 10, 3 );
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}
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foreach ( get_taxonomies( array( 'show_in_rest' => true ) ) as $taxonomy ) {
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add_filter( "rest_prepare_{$taxonomy}", array( $this, 'load_item_links' ), 10, 3 );
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}
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add_filter( 'rest_prepare_user', array( $this, 'load_item_links' ), 10, 3 );
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}
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/**
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* Add links to internal property for subsequent use in \ACF_Rest_Embed_Links::load_item_links().
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*
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* @param $post_id
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* @param array $field
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*/
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public function prepare_links( $post_id, array $field ) {
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$links = acf_get_field_rest_links( $post_id, $field );
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if ( ! $links ) {
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return;
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}
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foreach ( $links as $link ) {
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// If required array keys are not provided, skip.
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if ( empty( $link['rel'] ) or empty( $link['href'] ) ) {
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continue;
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}
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// Use the 'rel' and 'href' to for a key. The key only prevents against the same object
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// appearing more than once within the same 'rel' property.
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$this->links[ $link['rel'] . ':' . $link['href'] ] = $link;
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}
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}
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/**
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* Hook into the rest_prepare_{$type} filters and add links for the object being prepared.
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*
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* @param WP_REST_Response $response
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* @param WP_Post|WP_User|WP_Term $item
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* @param WP_REST_Request $request
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* @return WP_REST_Response
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*/
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public function load_item_links( $response, $item, $request ) {
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if ( empty( $this->links ) ) {
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return $response;
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}
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while ( $attributes = array_pop( $this->links ) ) {
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$response->add_link(
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acf_extract_var( $attributes, 'rel' ),
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acf_extract_var( $attributes, 'href' ),
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$attributes
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);
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}
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// Reset the links prop.
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$this->links = array();
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return $response;
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}
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}
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