<?php
/**
 * WooCommerce Transient Notices
 */

namespace Automattic\WooCommerce\Admin\Features;

use Automattic\WooCommerce\Internal\Admin\Loader;

/**
 * Shows print shipping label banner on edit order page.
 */
class TransientNotices {

	/**
	 * Option name for the queue.
	 */
	const QUEUE_OPTION = 'woocommerce_admin_transient_notices_queue';

	/**
	 * Constructor
	 */
	public function __construct() {
		add_filter( 'woocommerce_admin_preload_options', array( $this, 'preload_options' ) );
	}


	/**
	 * Get all notices in the queue.
	 *
	 * @return array
	 */
	public static function get_queue() {
		return get_option( self::QUEUE_OPTION, array() );
	}

	/**
	 * Get all notices in the queue by a given user ID.
	 *
	 * @param int $user_id User ID.
	 * @return array
	 */
	public static function get_queue_by_user( $user_id ) {
		$notices = self::get_queue();

		return array_filter(
			$notices,
			function( $notice ) use ( $user_id ) {
				return ! isset( $notice['user_id'] ) ||
					null === $notice['user_id'] ||
					$user_id === $notice['user_id'];
			}
		);
	}

	/**
	 * Get a notice by ID.
	 *
	 * @param array $notice_id Notice of ID to get.
	 * @return array|null
	 */
	public static function get( $notice_id ) {
		$queue = self::get_queue();

		if ( isset( $queue[ $notice_id ] ) ) {
			return $queue[ $notice_id ];
		}

		return null;
	}

	/**
	 * Add a notice to be shown.
	 *
	 * @param array $notice Notice.
	 *    $notice = array(
	 *      'id'      => (string) Unique ID for the notice. Required.
	 *      'user_id' => (int|null) User ID to show the notice to.
	 *      'status'  => (string) info|error|success
	 *      'content' => (string) Content to be shown for the notice. Required.
	 *      'options' => (array) Array of options to be passed to the notice component.
	 *       See https://developer.wordpress.org/block-editor/reference-guides/data/data-core-notices/#createNotice for available options.
	 *    ).
	 */
	public static function add( $notice ) {
		$queue = self::get_queue();

		$defaults               = array(
			'user_id' => null,
			'status'  => 'info',
			'options' => array(),
		);
		$notice_data            = array_merge( $defaults, $notice );
		$notice_data['options'] = (object) $notice_data['options'];

		$queue[ $notice['id'] ] = $notice_data;
		update_option( self::QUEUE_OPTION, $queue );
	}

	/**
	 * Remove a notice by ID.
	 *
	 * @param array $notice_id Notice of ID to remove.
	 */
	public static function remove( $notice_id ) {
		$queue = self::get_queue();
		unset( $queue[ $notice_id ] );
		update_option( self::QUEUE_OPTION, $queue );
	}

	/**
	 * Preload options to prime state of the application.
	 *
	 * @param array $options Array of options to preload.
	 * @return array
	 */
	public function preload_options( $options ) {
		$options[] = self::QUEUE_OPTION;

		return $options;
	}

}