<?php
/**
 * A source that keeps everything in ordinary post meta.
 *
 * @package AiRankSuite
 */

declare(strict_types=1);

namespace AiRankSuite\Modules\ImportExport\Adapters;

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

/**
 * Most SEO plugins store a page's title and description in two post meta
 * keys and nothing else. For those, an adapter is a table of key names —
 * writing a class per plugin with the same twenty lines in it would be a way
 * of hiding the one thing that differs.
 *
 * A subclass declares `keys()` (our field name => the plugin's meta key) and,
 * where the plugin is unusual, overrides one method.
 */
abstract class MetaAdapter extends Adapter {

	/**
	 * Our field name => the source's meta key. Fields: title, desc, keyword,
	 * canonical, noindex, nofollow, og_title, og_desc, og_image, tw_title,
	 * tw_desc, tw_image, breadcrumb_title.
	 *
	 * @return array<string, string>
	 */
	abstract protected function keys(): array;

	protected function post_meta_keys(): array {
		$keys = $this->keys();
		return array_values( array_filter( array( $keys['title'] ?? '', $keys['desc'] ?? '', $keys['keyword'] ?? '', $keys['canonical'] ?? '' ) ) );
	}

	protected function term_meta_keys(): array {
		return array();
	}

	public function post_record( int $post_id ): array {
		$keys   = $this->keys();
		$robots = $this->robots_from( $this->meta( $post_id, (string) ( $keys['noindex'] ?? '' ) ) );
		if ( '' !== (string) ( $keys['nofollow'] ?? '' ) ) {
			$robots = array_values( array_unique( array_merge( $robots, $this->robots_from( $this->meta( $post_id, (string) $keys['nofollow'] ), 'nofollow' ) ) ) );
		}
		return $this->clean(
			array(
				'title'            => $this->vars( $this->meta( $post_id, (string) ( $keys['title'] ?? '' ) ) ),
				'desc'             => $this->vars( $this->meta( $post_id, (string) ( $keys['desc'] ?? '' ) ) ),
				'keywords'         => array_values( array_filter( array_map( 'trim', explode( ',', $this->meta( $post_id, (string) ( $keys['keyword'] ?? '' ) ) ) ) ) ),
				'canonical'        => $this->meta( $post_id, (string) ( $keys['canonical'] ?? '' ) ),
				'robots'           => $robots,
				'breadcrumb_title' => $this->meta( $post_id, (string) ( $keys['breadcrumb_title'] ?? '' ) ),
				'social'           => array(
					'og_title' => $this->meta( $post_id, (string) ( $keys['og_title'] ?? '' ) ),
					'og_desc'  => $this->meta( $post_id, (string) ( $keys['og_desc'] ?? '' ) ),
					'og_image' => $this->meta( $post_id, (string) ( $keys['og_image'] ?? '' ) ),
					'tw_title' => $this->meta( $post_id, (string) ( $keys['tw_title'] ?? '' ) ),
					'tw_desc'  => $this->meta( $post_id, (string) ( $keys['tw_desc'] ?? '' ) ),
					'tw_image' => $this->meta( $post_id, (string) ( $keys['tw_image'] ?? '' ) ),
				),
			)
		);
	}
}