<?php

/**
 * Copyright Andreas Heigl <andreas@heigl.org>
 *
 * Licenses under the MIT-license. For details see the included file LICENSE.md
 */

declare(strict_types=1);

namespace Org_Heigl\AuthLdap;

use WP_User;

use function array_search;
use function in_array;
use function var_dump;

class UserRoleHandler
{
	/**
	 * @param WP_User $user
	 * @param string[] $roles
	 * @return void
	 */
	public function addRolesToUser(WP_User $user, $roles): void
	{
		if ($roles === []) {
			return;
		}

		if ($user->roles == $roles) {
			return;
		}

		// Remove unused roles from existing.
		foreach ($user->roles as $role) {
			if (!in_array($role, $roles)) {
				// Remove unused roles.
				$user->remove_role($role);
				continue;
			}
			// Remove the existing role from roles.
			if (($key = array_search($role, $roles)) !== false) {
				unset($roles[$key]);
			}
		}

		// Add new ones if not already assigned.
		foreach ($roles as $role) {
			$user->add_role($role);
		}
	}
}