<?php
/**
 * The routes for post related functionality
 *
 * Defines the functionality loaded on admin.
 *
 * @since      1.0.15
 * @package    RankMath
 * @subpackage RankMath\Rest
 * @author     Rank Math <support@rankmath.com>
 */

namespace RankMath\Rest;

use WP_Error;
use WP_REST_Server;
use WP_REST_Request;
use WP_REST_Controller;
use RankMath\Helper;

defined( 'ABSPATH' ) || exit;

/**
 * Post class.
 */
class Post extends WP_REST_Controller {

	/**
	 * Constructor.
	 */
	public function __construct() {
		$this->namespace = \RankMath\Rest\Rest_Helper::BASE;
	}

	/**
	 * Registers the routes for the objects of the controller.
	 */
	public function register_routes() {
		register_rest_route(
			$this->namespace,
			'/updateMetaBulk',
			[
				'methods'             => WP_REST_Server::CREATABLE,
				'permission_callback' => function() {
					return \RankMath\Helper::has_cap( 'onpage_general' );
				},
				'callback'            => [ $this, 'update_bulk_meta' ],
				'args'                => $this->get_update_metadata_args(),
			]
		);

		register_rest_field(
			'page',
			'rankMath',
			[
				'get_callback'        => [ $this, 'get_post_screen_meta' ],
				'schema'              => null,
				'permission_callback' => function() {
					return current_user_can( 'read' );
				},
			]
		);
	}

	/**
	 * Update bulk metadata.
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 *
	 * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
	 */
	public function update_bulk_meta( WP_REST_Request $request ) {
		$rows = $request->get_param( 'rows' );

		foreach ( $rows as $post_id => $data ) {
			$post_id = absint( $post_id );
			if ( ! $post_id ) {
				continue;
			}

			$post_type = get_post_type( $post_id );
			if ( ! Helper::is_post_type_accessible( $post_type ) && 'attachment' !== $post_type ) {
				continue;
			}

			$this->save_row( $post_id, $data );
		}

		return [ 'success' => true ];
	}

	/**
	 * Retrieves the Post screen metadata to be utilized when a Page is changed from the Full Site Editor.
	 */
	public function get_post_screen_meta() {
		$screen = new \RankMath\Admin\Metabox\Screen();
		$screen->load_screen( 'post' );
		return $screen->get_values();
	}

	/**
	 * Save single row.
	 *
	 * @param int   $post_id Post ID.
	 * @param array $data    Post data.
	 */
	private function save_row( $post_id, $data ) {
		foreach ( $data as $key => $value ) {
			$this->save_column( $post_id, $key, $value );
		}
	}

	/**
	 * Save row columns.
	 *
	 * @param int    $post_id Post ID.
	 * @param string $column  Column name.
	 * @param string $value   Column value.
	 */
	private function save_column( $post_id, $column, $value ) {
		if ( ! in_array( $column, [ 'focus_keyword', 'title', 'description', 'image_alt', 'image_title' ], true ) ) {
			return;
		}

		$sanitizer = Sanitize::get();
		if ( 'image_title' === $column ) {
			wp_update_post(
				[
					'ID'         => $post_id,
					'post_title' => $sanitizer->sanitize( 'image_title', $value ),
				]
			);
			return;
		}

		if ( 'focus_keyword' === $column ) {
			$focus_keyword    = get_post_meta( $post_id, 'rank_math_' . $column, true );
			$focus_keyword    = explode( ',', $focus_keyword );
			$focus_keyword[0] = $value;
			$value            = implode( ',', $focus_keyword );
		}

		$column = 'image_alt' === $column ? '_wp_attachment_image_alt' : 'rank_math_' . $column;
		update_post_meta( $post_id, $column, $sanitizer->sanitize( $column, $value ) );
	}

	/**
	 * Get update metadta endpoint arguments.
	 *
	 * @return array
	 */
	private function get_update_metadata_args() {
		return [
			'rows' => [
				'required'          => true,
				'description'       => esc_html__( 'No meta rows found to update.', 'rank-math' ),
				'validate_callback' => [ '\\RankMath\\Rest\\Rest_Helper', 'is_param_empty' ],
			],
		];
	}
}
