<?php

/**
 * @package     WP Subtitle
 * @subpackage  REST API
 *
 * @since  3.1
 */

class WPSubtitle_REST {

	/**
	 * Constructor
	 *
	 * @since  3.1
	 *
	 * @internal  Do not create multiple instances.
	 */
	public function __construct() {

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

	}

	/**
	 * Register REST Field
	 *
	 * @since  3.1
	 *
	 * @internal  Called via the `rest_api_init` action.
	 */
	public function register_rest_field() {

		$post_types = WPSubtitle::get_supported_post_types();

		foreach ( $post_types as $post_type ) {

			register_rest_field(
				$post_types,
				'wps_subtitle',
				array(
					'get_callback'    => array( $this, 'get_rest_field' ),
					'update_callback' => array( $this, 'update_rest_field' ),
					'schema'          => null,
				)
			);

		}

	}

	/**
	 * Get REST Field
	 *
	 * @since  3.1
	 *
	 * @internal  Called via register_rest_field() callback.
	 *
	 * @param   array           $object      Current post details.
	 * @param   string          $field_name  Name of field.
	 * @param   WP_REST_Request $request     Current request.
	 * @return  string                        Subtitle
	 */
	public function get_rest_field( $object, $field_name, $request ) {

		$subtitle = new WP_Subtitle( $object['id'] );

		return $subtitle->get_raw_subtitle();

	}

	/**
	 * Update REST Field
	 *
	 * @since  3.4
	 *
	 * @internal  Called via register_rest_field() callback.
	 *
	 * @param  string $value   New value for the field.
	 * @param  array  $object  Current post details.
	 */
	public function update_rest_field( $value, $object ) {

		update_post_meta( $object->ID, 'wps_subtitle', wp_kses_post( $value ) );

	}

}