<?php
/**
 * Shared CPT helpers.
 *
 * @package StreamSera
 */

namespace StreamSera\PostTypes;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Base class for the plugin post types: registration, REST meta, capabilities.
 */
abstract class Base {

	const POST_TYPE = '';

	/**
	 * Labels.
	 *
	 * @return array{0:string,1:string}
	 */
	abstract protected function labels();

	/**
	 * REST base.
	 *
	 * @return string
	 */
	abstract protected function rest_base();

	/**
	 * Meta definitions: key => args (type, default, schema, sanitize).
	 *
	 * @return array
	 */
	abstract protected function meta();

	/**
	 * Hook in.
	 */
	public function register() {
		add_action( 'init', array( $this, 'register_post_type' ) );
		add_action( 'init', array( $this, 'register_meta' ) );
	}

	/**
	 * Post type supports.
	 *
	 * @return array
	 */
	protected function supports() {
		return array( 'title', 'editor', 'thumbnail', 'custom-fields' );
	}

	/**
	 * Extra register_post_type() args.
	 *
	 * @return array
	 */
	protected function args() {
		return array();
	}

	/**
	 * Register CPT.
	 */
	public function register_post_type() {
		list( $plural, $singular ) = $this->labels();
		register_post_type(
			static::POST_TYPE,
			array_merge(
				array(
					'labels'              => array(
						'name'          => $plural,
						'singular_name' => $singular,
					),
					'public'              => false,
					'show_ui'             => false,
					'show_in_rest'        => true,
					'rest_base'           => $this->rest_base(),
					'rest_namespace'      => 'wp/v2',
					'supports'            => $this->supports(),
					'capability_type'     => 'post',
					'map_meta_cap'        => true,
					'exclude_from_search' => true,
				),
				$this->args()
			)
		);
	}

	/**
	 * Sanitize a social-links map: { network => URL }. Network names become keys, URLs are
	 * validated, empty entries are dropped.
	 *
	 * @param mixed $social Raw value.
	 * @return array
	 */
	public static function sanitize_social_links( $social ) {
		$out = array();
		if ( ! is_array( $social ) ) {
			return $out;
		}
		foreach ( $social as $key => $url ) {
			$key  = sanitize_key( $key );
			$url  = is_scalar( $url ) ? esc_url_raw( trim( (string) $url ), array( 'http', 'https' ) ) : '';
			$host = $url ? (string) wp_parse_url( $url, PHP_URL_HOST ) : '';
			if ( $key && $url && false !== strpos( $host, '.' ) ) {
				$out[ $key ] = $url;
			}
		}
		return $out;
	}

	/**
	 * Register meta.
	 */
	public function register_meta() {
		foreach ( $this->meta() as $key => $def ) {
			$args = array(
				'type'          => isset( $def['type'] ) ? $def['type'] : 'string',
				'single'        => true,
				'show_in_rest'  => isset( $def['schema'] ) ? array( 'schema' => $def['schema'] ) : true,
				'auth_callback' => static function () {
					return current_user_can( 'edit_posts' );
				},
			);
			if ( isset( $def['default'] ) ) {
				$args['default'] = $def['default'];
			}
			if ( isset( $def['sanitize'] ) ) {
				$args['sanitize_callback'] = $def['sanitize'];
			}
			register_post_meta( static::POST_TYPE, '_streamsera_' . $key, $args );
		}
	}
}