wp-charitable-rest-api.php

/**
 * Enable REST API Support for Charitable Campaigns
 *
 */

/**
 * Register support for post type
 */
function en_enable_campaign_rest_support( $post_type_args ) {
    $post_type_args[ 'show_in_rest' ] = true;
    $post_type_args[ 'rest_base' ] = 'campaign';
    $post_type_args[ 'rest_controller_class' ] = 'WP_REST_Posts_Controller';
    return $post_type_args;
}
add_filter( 'charitable_campaign_post_type', 'en_enable_campaign_rest_support' );



/**
 * Add REST API support to Campaign Taxonomies.
 */
add_action( 'init', 'en_enable_campaign_taxonomy_rest_support', 25 );
function en_enable_campaign_taxonomy_rest_support() {
  global $wp_taxonomies;
 
  //be sure to set this to the name of your taxonomy!
  $taxonomy_name = 'campaign_category';
 
  if ( isset( $wp_taxonomies[ $taxonomy_name ] ) ) {
    $wp_taxonomies[ $taxonomy_name ]->show_in_rest = true;
 
    // Optionally customize the rest_base or controller class
    $wp_taxonomies[ $taxonomy_name ]->rest_base = $taxonomy_name;
    $wp_taxonomies[ $taxonomy_name ]->rest_controller_class = 'WP_REST_Terms_Controller';
  }
 
  //be sure to set this to the name of your taxonomy!
  $taxonomy_name = 'campaign_tag';
 
  if ( isset( $wp_taxonomies[ $taxonomy_name ] ) ) {
    $wp_taxonomies[ $taxonomy_name ]->show_in_rest = true;
 
    // Optionally customize the rest_base or controller class
    $wp_taxonomies[ $taxonomy_name ]->rest_base = $taxonomy_name;
    $wp_taxonomies[ $taxonomy_name ]->rest_controller_class = 'WP_REST_Terms_Controller';
  }
}


/**
 * Register Campaign meta fields with Rest API (READ ONLY)
 */
add_action( 'rest_api_init', 'en_enable_campaign_meta_fields' );
function en_enable_campaign_meta_fields() {
		
	$fields = array(
		'_campaign_description',
		'_campaign_end_date',
		'_campaign_location',
		'_campaign_latitude',
		'_campaign_longitude'
	);

	foreach($fields as $field){
		
		register_rest_field( 'campaign',
			$field,
			array(
				'get_callback'    => 'en_campaigns_get_custom_meta',
				'update_callback' => null,
				'schema'          => null,
			)
		);	
		
	}
	
}

/**
 * Helper function to get meta values
 */
function en_campaigns_get_custom_meta( $object, $field_name, $request ) {
	
    return get_post_meta( $object[ 'id' ], $field_name, true );
	
}