<?php
/*
 * @Author: YwxApp <ywx@ywxapp.cn>
 * @Date: 2026-04-29 02:32:33
 * @LastEditors: YwxApp <ywx@ywxapp.cn>
 * @LastEditTime: 2026-07-21 23:25:55
 * @Description: 
 * @FilePath: \ywxapp_dev\app\backend\service\PermissionService.php
 * @CustomString: Copyright (c) 2026 YwxApp
 */

declare(strict_types=1);
namespace app\backend\service;

use ywxapp\model\BackendAdmin as AdminModel;
use ywxapp\model\RolePermission;
use ywxapp\model\Permission as PermissionModel;

/**
 * 权限服务类
 * 
 * // 获取权限列表
 * $permissionList = PermissionService::getUserPermissions($userId);
 * // 或者获取权限树
 * $permissionTree = PermissionService::getUserPermissionTree($userId);
 * // 或者只获取权限编码
 * $permissionCodes = PermissionService::getUserPermissionCodes($userId);
 */
class PermissionService
{
    /**
     * 获取当前用户的权限列表
     * @param int $userId 用户ID
     * @return array
     */
    public static function getUserPermissions($userId)
    {
        // 1. 获取用户角色
        $user = AdminModel::with(['roles'])->find($userId);
        if (!$user) {
            return [];
        }
        
        $roleIds = array_column($user->roles->toArray(), 'id');
        if (empty($roleIds)) {
            return [];
        }
        
        // 2. 获取角色权限ID
        $permissionIds = RolePermission::where('role_id', 'in', $roleIds)
            ->column('permission_id');
        
        if (empty($permissionIds)) {
            return [];
        }
        
        // 3. 获取权限详情
        return PermissionModel::where('id', 'in', $permissionIds)
            ->select()
            ->toArray();
    }
    /**
     * 获取当前用户的权限列表
     * @param int $userId 用户ID
     * @return array
     */
    public static function getUserMenus($userId)
    {
        // 1. 获取用户角色
        $user = AdminModel::with(['roles'])->find($userId);
        if (!$user) {
            return [];
        }
        
        $roleIds = array_column($user->roles->toArray(), 'id');
        if (empty($roleIds)) {
            return [];
        }
        
        // 2. 获取角色权限ID
        $permissionIds = RolePermission::where('role_id', 'in', $roleIds)
            ->column('permission_id');
        
        if (empty($permissionIds)) {
            return [];
        }
        
        // 3. 获取权限详情
        $permissions = PermissionModel::where('type',1)->where('id', 'in', $permissionIds)
            ->select()
            ->toArray();

            
        return self::buildPermissionTree($permissions);
    }
    
    /**
     * 获取当前用户的权限树
     * @param int $userId 用户ID
     * @return array
     */
    public static function getUserPermissionTree($userId)
    {
        $permissions = self::getUserPermissions($userId);
        return self::buildPermissionTree($permissions);
    }
    
    /**
     * 构建权限树
     * @param array $permissions 权限列表
     * @param int $parentId 父级ID
     * @return array
     */
    protected static function buildPermissionTree($permissions, $parentId = 0)
    {
        $tree = [];
        foreach ($permissions as $permission) {
            if ($permission['pid'] == $parentId) {
                $children = self::buildPermissionTree($permissions, $permission['id']);
                if ($children) {
                    $permission['children'] = $children;
                }
                $tree[] = $permission;
            }
        }
        return $tree;
    }
    
    /**
     * 获取当前用户的权限编码列表
     * @param int $userId 用户ID
     * @return array
     */
    public static function getUserPermissionCodes($userId)
    {
        $permissions = self::getUserPermissions($userId);
        return array_column($permissions, 'code');
    }
}