<?php
declare(strict_types=1);

namespace app\common\service;

use app\common\model\auth\SystemMenu;

/** 菜单授权只在自身与完整祖先链均存在、启用且无环时生效；is_show不参与接口授权。 */
final class ActiveMenuPermissions
{
    public static function ids(): array
    {
        $rows = SystemMenu::field('id,pid,is_disable')->select()->toArray();
        $byId = [];
        foreach ($rows as $row) { $byId[(int) $row['id']] = $row; }
        $enabled = [];
        foreach ($byId as $id => $row) {
            $current = $id;
            $visited = [];
            while ($current > 0) {
                if (isset($visited[$current]) || !isset($byId[$current]) || (int) $byId[$current]['is_disable'] !== 0) { continue 2; }
                $visited[$current] = true;
                $current = (int) $byId[$current]['pid'];
            }
            $enabled[] = $id;
        }
        return $enabled;
    }

    public static function has(string $permission): bool
    {
        return SystemMenu::whereIn('id', self::ids())->where('perms', $permission)->count() > 0;
    }
}