<?php
/**
 * REST API: WP_REST_Post_Meta_Fields class
 *
 * @package WordPress
 * @subpackage REST_API
 * @since 4.7.0
 */

/**
 * Core class used to manage meta values for posts via the REST API.
 *
 * @since 4.7.0
 *
 * @see WP_REST_Meta_Fields
 */
class WP_REST_Post_Meta_Fields extends WP_REST_Meta_Fields {

    /**
     * Post type to register fields for.
     *
     * @since 4.7.0
     * @var string
     */
    protected $post_type;

    /**
     * Constructor.
     *
     * @since 4.7.0
     *
     * @param string $post_type Post type to register fields for.
     */
    public function __construct( $post_type ) {
        $this->post_type = $post_type;
    }

    /**
     * Retrieves the post meta type.
     *
     * @since 4.7.0
     *
     * @return string The meta type.
     */
    protected function get_meta_type() {
        return 'post';
    }

    /**
     * Retrieves the post meta subtype.
     *
     * @since 4.9.8
     *
     * @return string Subtype for the meta type, or empty string if no specific subtype.
     */
    protected function get_meta_subtype() {
        return $this->post_type;
    }

    /**
     * Retrieves the type for register_rest_field().
     *
     * @since 4.7.0
     *
     * @see register_rest_field()
     *
     * @return string The REST field type.
     */
    public function get_rest_field_type() {
        return $this->post_type;
    }
}