Custom API data examples for AppPresser List Pages

custom-api-data.php

<?php
/*
Plugin Name: AppPresser sample API code
Plugin URI: http://apppresser.com
Description: How to manipulate the WP-API for your app.
Version: 0.1
Author: AppPresser Team
Author URI: http://apppresser.com
License: GPLv2
*/

/*
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

// You can uncomment the function below if you are seeing CORS errors
// add_action('send_headers', function() {
// 	header("Access-Control-Allow-Origin: *");
// });

/****************************************************************************************
* Add featured image urls to post response for custom post types. This is enabled if you activate this plugin.
* Sample usage in the app files would be data.featured_image_urls.thumbnail
****************************************************************************************/

// Uncomment the line below to enable this function. Be sure to change the post type name in the callback function first
// add_action( 'rest_api_init', 'appp_add_featured_urls' );

function appp_add_featured_urls() {
	register_rest_field( 'product', // change to your cpt slug. Don't need to add 'post', it's already covered
	    'featured_image_urls',
	    array(
	        'get_callback'    => 'appp_featured_images',
	        'update_callback' => null,
            'schema'          => null,
	    )
	);
}

function appp_featured_images( $post ) {

    $featured_id = get_post_thumbnail_id( $post['id'] );

	$sizes = wp_get_attachment_metadata( $featured_id );

	$size_data = new stdClass();
			
	if ( ! empty( $sizes['sizes'] ) ) {

		foreach ( $sizes['sizes'] as $key => $size ) {
			// Use the same method image_downsize() does
			$image_src = wp_get_attachment_image_src( $featured_id, $key );

			if ( ! $image_src ) {
				continue;
			}
			
			$size_data->$key = $image_src[0];
			
		}

	}

	return $size_data;
    
}

/****************************************************************************************
* Add REST API support to an already registered post type
* http://v2.wp-api.org/extending/custom-content-types/
* Access this post type at yoursite.com/wp-json/wp/v2/post_type_name
****************************************************************************************/

// Uncomment the line below to enable this function. Be sure to change the post type name in the callback function first
// add_action( 'init', 'appp_post_type_rest_support', 999 );

function appp_post_type_rest_support() {

	global $wp_post_types;

	//be sure to set this to the name of your post type!
	$post_type_name = 'product';
	if( isset( $wp_post_types[ $post_type_name ] ) ) {
		$wp_post_types[$post_type_name]->show_in_rest = true;
		$wp_post_types[$post_type_name]->rest_base = $post_type_name;
		$wp_post_types[$post_type_name]->rest_controller_class = 'WP_REST_Posts_Controller';
	}

}




/****************************************************************************************
* Add post meta to a response
* http://v2.wp-api.org/extending/modifying/
* This example adds price to a woocommerce product. Meta key is _price, and corresponding api field will also be _price. 
****************************************************************************************/

// Uncomment the line below to enable this function.
// add_action( 'rest_api_init', 'appp_register_post_meta' );


function appp_register_post_meta() {
    register_rest_field( 'product', // any post type registered with API
        '_price', // this needs to match meta key
        array(
            'get_callback'    => 'appp_get_meta',
            'update_callback' => null,
            'schema'          => null,
        )
    );
}

/**
 * Get the value of a meta field field
 *
 * @param array $object Details of current post.
 * @param string $field_name Name of field.
 * @param WP_REST_Request $request Current request
 *
 * @return mixed
 */
function appp_get_meta( $object, $field_name, $request ) {
    return get_post_meta( $object[ 'id' ], $field_name, true );
}


/****************************************************************************************
* How to use an AppPresser template hook
****************************************************************************************/

// Uncomment the line below to enable this function.
// add_action( 'rest_api_init', 'appp_register_template_hook' );

function appp_register_template_hook() {
    register_rest_field( 'post', // any post type registered with API
        'appp',
        array(
            'get_callback'    => 'appp_get_hook_data',
            'update_callback' => null,
            'schema'          => null,
        )
    );
}

/**
 * Get the value of a meta field field
 *
 * @param array $object Details of current post.
 * @param string $field_name Name of field.
 * @param WP_REST_Request $request Current request
 *
 * @return mixed
 */
function appp_get_hook_data( $object, $field_name, $request ) {
	
	$data = [];
	// Add a featured image to the single post view in the app
	$data['post_detail']['above_title'] = '<div class="post-featured-wrap">' . get_the_post_thumbnail( $object['id'], 'large', array( 'class' => 'post-featured' ) ) . '</div>';
	
	return $data;
}

/**
 * Add REST API support to an already registered taxonomy.
 * If you register a custom taxonomy, you can find it at yoursite.com/wp-json/wp/v2/taxonomyname
 * You can filter custom post type queries by taxonomy like this: yoursite.com/wp-json/wp/v2/cptname?taxonomyname=value
 */
// add_filter( 'register_taxonomy_args', 'sb_taxonomy_args', 999, 2 );
 
function sb_taxonomy_args( $args, $taxonomy_name ) {
 
    if ( 'accessories' === $taxonomy_name ) {
        $args['show_in_rest'] = true;
        $args['query_var']    = true;
 
        // Optionally customize the rest_base or rest_controller_class
        $args['rest_base']             = $taxonomy_name;
        $args['rest_controller_class'] = 'WP_REST_Terms_Controller';
    }
 
    return $args;
}