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✏️ Editing: get-suggestions-route.php Writable

<?php

// phpcs:disable Yoast.NamingConventions.NamespaceName.TooLong -- Needed in the folder structure.
namespace Yoast\WP\SEO\AI\Content_Planner\User_Interface;

use RuntimeException;
use WP_REST_Request;
use WP_REST_Response;
use Yoast\WP\SEO\AI\Content_Planner\Application\Content_Suggestion_Command;
use Yoast\WP\SEO\AI\Content_Planner\Application\Content_Suggestion_Command_Handler;
use Yoast\WP\SEO\AI\HTTP_Request\Domain\Exceptions\Payment_Required_Exception;
use Yoast\WP\SEO\AI\HTTP_Request\Domain\Exceptions\Remote_Request_Exception;
use Yoast\WP\SEO\AI\HTTP_Request\Domain\Exceptions\Too_Many_Requests_Exception;
use Yoast\WP\SEO\Conditionals\AI_Conditional;
use Yoast\WP\SEO\Main;
use Yoast\WP\SEO\Routes\Route_Interface;

/**
 * Registers a route to get content suggestions from the AI API.
 *
 * @internal This route powers the Yoast SEO admin UI's Content Planner feature. It is not part of the plugin's public REST API surface, requires the capability to edit posts of the requested post type (see {@see self::check_permissions()}), and may change at any time without notice.
 *
 * @makePublic
 *
 * @phpcs:disable Yoast.NamingConventions.ObjectNameDepth.MaxExceeded
 */
class Get_Suggestions_Route implements Route_Interface {

/**
	 * The namespace for this route.
	 *
	 * @var string
	 */
	public const ROUTE_NAMESPACE = Main::API_V1_NAMESPACE;

/**
	 * The prefix for this route.
	 *
	 * @var string
	 */
	public const ROUTE_PREFIX = '/ai_content_planner/get_suggestions';

/**
	 * The command handler instance.
	 *
	 * @var Content_Suggestion_Command_Handler
	 */
	private $command_handler;

/**
	 * Returns the conditionals based in which this loadable should be active.
	 *
	 * @return array<string> The conditionals.
	 */
	public static function get_conditionals() {
		return [ AI_Conditional::class ];
	}

/**
	 * Class constructor.
	 *
	 * @param Content_Suggestion_Command_Handler $command_handler The command handler instance.
	 */
	public function __construct( Content_Suggestion_Command_Handler $command_handler ) {
		$this->command_handler = $command_handler;
	}

/**
	 * Registers routes with WordPress.
	 *
	 * @return void
	 */
	public function register_routes() {
		\register_rest_route(
			self::ROUTE_NAMESPACE,
			self::ROUTE_PREFIX,
			[
				'methods'             => 'GET',
				'args'                => [
					'post_type' => [
						'required'    => true,
						'type'        => 'string',
						'description' => 'The post type to get content suggestions for.',
					],
					'language'  => [
						'required'    => true,
						'type'        => 'string',
						'description' => 'The language the content is written in.',
					],
					'editor'    => [
						'required'    => true,
						'type'        => 'string',
						'enum'        => [
							'classic',
							'elementor',
							'gutenberg',
						],
						'description' => 'The current editor.',
					],
				],
				'callback'            => [ $this, 'get_suggestions' ],
				'permission_callback' => [ $this, 'check_permissions' ],
			],
		);
	}

/**
	 * Runs the callback to get AI-generated content suggestions.
	 *
	 * @param WP_REST_Request $request The request object.
	 *
	 * @return WP_REST_Response The response of the get_suggestions action.
	 */
	public function get_suggestions( WP_REST_Request $request ): WP_REST_Response {
		try {
			$user = \wp_get_current_user();

$command = new Content_Suggestion_Command(
				$user,
				$request->get_param( 'post_type' ),
				$request->get_param( 'language' ),
				$request->get_param( 'editor' ),
			);
			$data    = $this->command_handler->handle( $command );
		} catch ( Remote_Request_Exception $e ) {
			$message = [
				'message'         => $e->getMessage(),
				'errorIdentifier' => $e->get_error_identifier(),
			];
			if ( $e instanceof Payment_Required_Exception || $e instanceof Too_Many_Requests_Exception ) {
				$message['missingLicenses'] = $e->get_missing_licenses();
			}
			return new WP_REST_Response(
				$message,
				$e->getCode(),
			);
		} catch ( RuntimeException $e ) {
			return new WP_REST_Response( 'Failed to get content suggestions.', 500 );
		}

return new WP_REST_Response( $data->to_array() );
	}

/**
	 * Checks if the user is logged in and can edit posts of the requested post type.
	 *
	 * The requested post_type is caller-controlled, so the permission must be evaluated
	 * against that post type's own edit_posts meta-capability — not the generic
	 * 'edit_posts' string, which would let a user with edit_posts but no edit_pages
	 * (e.g. an Author) pull metadata for pages or arbitrary CPTs.
	 *
	 * @param WP_REST_Request $request The request object.
	 *
	 * @return bool Whether the user can edit posts of the requested post type.
	 */
	public function check_permissions( WP_REST_Request $request ): bool {
		$user = \wp_get_current_user();
		if ( $user === null || $user->ID < 1 ) {
			return false;
		}

$post_type        = $request->get_param( 'post_type' );
		$post_type_object = \get_post_type_object( $post_type );
		if ( $post_type_object === null ) {
			return false;
		}

return \user_can( $user, $post_type_object->cap->edit_posts );
	}
}

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