TP5 Auth permission management example

<?php
namespace think;
use think\Config;
use think\Session;
use think\Db;
/**
 * 权限认证类
 */
//数据库
/*
  -- ----------------------------
  -- mt4_auth_rule，规则表，
  -- id:主键，name：规则唯一标识, title：规则中文名称 status 状态：为1正常，为0禁用，condition：规则表达式，为空表示存在就验证，不为空表示按照条件验证
  -- ----------------------------
  DROP TABLE IF EXISTS `mt4_auth_rule`;
  CREATE TABLE `mt4_auth_rule` (
  `id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
  `name` char(80) NOT NULL DEFAULT &#39;&#39;,
  `title` char(20) NOT NULL DEFAULT &#39;&#39;,
  `type` tinyint(1) NOT NULL DEFAULT &#39;1&#39;,
  `status` tinyint(1) NOT NULL DEFAULT &#39;1&#39;,
  `condition` char(100) NOT NULL DEFAULT &#39;&#39;,  # 规则附件条件,满足附加条件的规则,才认为是有效的规则
  PRIMARY KEY (`id`),
  UNIQUE KEY `name` (`name`)
  ) ENGINE=MyISAM  DEFAULT CHARSET=utf8;
  -- ----------------------------
  -- mt4_auth_group 用户组表，
  -- id：主键， title:用户组中文名称， rules：用户组拥有的规则id， 多个规则","隔开，status 状态：为1正常，为0禁用
  -- ----------------------------
  DROP TABLE IF EXISTS `mt4_auth_group`;
  CREATE TABLE `mt4_auth_group` (
  `id` mediumint(8) unsigned NOT NULL AUTO_INCREMENT,
  `title` char(100) NOT NULL DEFAULT &#39;&#39;,
  `status` tinyint(1) NOT NULL DEFAULT &#39;1&#39;,
  `rules` char(80) NOT NULL DEFAULT &#39;&#39;,
  PRIMARY KEY (`id`)
  ) ENGINE=MyISAM  DEFAULT CHARSET=utf8;
  -- ----------------------------
  -- mt4_auth_group_access 用户组明细表
  -- uid:用户id，group_id：用户组id
  -- ----------------------------
  DROP TABLE IF EXISTS `mt4_auth_group_access`;
  CREATE TABLE `mt4_auth_group_access` (
  `uid` mediumint(8) unsigned NOT NULL,
  `group_id` mediumint(8) unsigned NOT NULL,
  UNIQUE KEY `uid_group_id` (`uid`,`group_id`),
  KEY `uid` (`uid`),
  KEY `group_id` (`group_id`)
  ) ENGINE=MyISAM DEFAULT CHARSET=utf8;
 */

class Auth {
    //默认配置
    protected $config = array(
        &#39;auth_on&#39;           => true,                      // 认证开关
        &#39;auth_type&#39;         => 2,                         // 认证方式，1为实时认证；2为登录认证。
        &#39;auth_group&#39;        => &#39;auth_group&#39;,        // 用户组数据表名
        &#39;auth_group_access&#39; => &#39;auth_group_access&#39;, // 用户-用户组关系表
        &#39;auth_rule&#39;         => &#39;auth_rule&#39;,         // 权限规则表
        &#39;auth_user&#39;         => &#39;auth_admin&#39;             // 用户信息表
    );
    
    public function __construct() {
        if (Config::get(&#39;auth_config&#39;)) {
            $this->config = array_merge($this->config, Config::get(&#39;auth_config&#39;)); //可设置配置项 auth_config, 此配置项为数组。
        }
    }
    /**
     * 检查权限
     * @param name string|array  需要验证的规则列表,支持逗号分隔的权限规则或索引数组
     * @param uid  int           认证用户的id
     * @param string mode        执行check的模式
     * @param relation string    如果为 &#39;or&#39; 表示满足任一条规则即通过验证;如果为 &#39;and&#39;则表示需满足所有规则才能通过验证
     * return boolean           通过验证返回true;失败返回false
     */
    public function check($name, $uid, $type = 1, $mode = &#39;url&#39;, $relation = &#39;or&#39;) {
        if (!$this->config[&#39;auth_on&#39;]) {
            return true;
        }
        $authList = $this->getAuthList($uid, $type); //获取用户需要验证的所有有效规则列表
        if (is_string($name)) {
            $name = strtolower($name);
//            if (strpos($name, &#39;,&#39;) !== false) {
//                $name = explode(&#39;,&#39;, $name);
//            } else {
//                $name = [$name];
//            }
            $name = strpos($name, &#39;,&#39;) !== false ? explode(&#39;,&#39;, $name) : [$name];
        }
        $list = []; //保存验证通过的规则名
        if ($mode == &#39;url&#39;) {
            $REQUEST = unserialize(strtolower(serialize($_REQUEST)));
        }
        foreach ($authList as $auth) {
            $query = preg_replace(&#39;/^.+\?/U&#39;, &#39;&#39;, $auth);
            if ($mode == &#39;url&#39; && $query != $auth) {
                parse_str($query, $param); //解析规则中的param
                $intersect = array_intersect_assoc($REQUEST, $param);
                $auth = preg_replace(&#39;/\?.*$/U&#39;, &#39;&#39;, $auth);
                if (in_array($auth, $name) && $intersect == $param) {  //如果节点相符且url参数满足
                    $list[] = $auth;
                }
            } else if (in_array($auth, $name)) {
                $list[] = $auth;
            }
        }
        if ($relation == &#39;or&#39; and ! empty($list)) {
            return false;
        }
        $diff = array_diff($name, $list);
        if ($relation == &#39;and&#39; and empty($diff)) {
            return false;
        }
        return true;
    }
    /**
     * 根据用户id获取用户组,返回值为数组
     * @param  uid int     用户id
     * return array       用户所属的用户组 [
     *     [&#39;uid&#39;=>&#39;用户id&#39;,&#39;group_id&#39;=>&#39;用户组id&#39;,&#39;title&#39;=>&#39;用户组名称&#39;,&#39;rules&#39;=>&#39;用户组拥有的规则id,多个,号隔开&#39;),
     *     ...)   
     */
    public function getGroups($uid) {
        static $groups = [];
        if (isset($groups[$uid])) {
            return $groups[$uid];
        }
        $user_groups = Db::view($this->config[&#39;auth_group_access&#39;], &#39;uid,group_id&#39;)->view($this->config[&#39;auth_group&#39;], &#39;title,rules&#39;, "{$this->config[&#39;auth_group_access&#39;]}.group_id={$this->config[&#39;auth_group&#39;]}.id")
                        ->where([&#39;uid&#39; => $uid, &#39;status&#39; => 1])->select();
        $groups[$uid] = $user_groups ? $user_groups : [];
        return $groups[$uid];
    }
    /**
     * 获得权限列表
     * @param integer $uid  用户id
     * @param integer $type 
     */
    protected function getAuthList($uid, $type) {
        static $_authList = []; //保存用户验证通过的权限列表
        $t = implode(&#39;,&#39;, (array) $type);
        if (isset($_authList[$uid . $t])) {
            return $_authList[$uid . $t];
        }
        if ($this->config[&#39;auth_type&#39;] == 2 && Session::has(&#39;_auth_list_&#39; . $uid . $t)) {
            return Session::get(&#39;_auth_list_&#39; . $uid . $t);
        }
        //读取用户所属用户组
        $groups = $this->getGroups($uid);
        $ids = []; //保存用户所属用户组设置的所有权限规则id
        foreach ($groups as $g) {
            $ids = array_merge($ids, explode(&#39;,&#39;, trim($g[&#39;rules&#39;], &#39;,&#39;)));
        }
        $ids = array_unique($ids);
        if (empty($ids)) {
            $_authList[$uid . $t] = [];
            return [];
        }
        $map = [
            &#39;id&#39; => [&#39;notin&#39;, $ids],
            &#39;type&#39; => $type,
            &#39;status&#39; => 1,
        ];
        //读取用户组所有权限规则
        $rules = Db::name($this->config[&#39;auth_rule&#39;])->where($map)->field(&#39;condition,name&#39;)->select();
        //循环规则，判断结果。
        $authList = [];   //
        foreach ($rules as $rule) {
            if (!empty($rule[&#39;condition&#39;])) { //根据condition进行验证
                $this->getUserInfo($uid); //获取用户信息,一维数组
                $command = preg_replace(&#39;/\{(\w*?)\}/&#39;, &#39;$user[\&#39;\\1\&#39;]&#39;, $rule[&#39;condition&#39;]);
                @(eval(&#39;$condition=(&#39; . $command . &#39;);&#39;));
                $condition && $authList[] = strtolower($rule[&#39;name&#39;]);
            } else {
                $authList[] = strtolower($rule[&#39;name&#39;]); //只要存在就记录
            }
        }
        $_authList[$uid . $t] = $authList;
        if ($this->config[&#39;auth_type&#39;] == 2) {
            $_SESSION[&#39;_auth_list_&#39; . $uid . $t] = $authList; //规则列表结果保存到session
        }
        return array_unique($authList);
    }
    /**
     * 获得用户资料,根据自己的情况读取数据库
     */
    protected function getUserInfo($uid) {
        static $userinfo = [];
        if (!isset($userinfo[$uid])) {
            $userinfo[$uid] = Db::name($this->config[&#39;auth_user&#39;])->where([&#39;uid&#39; => $uid])->find();
        }
        return $userinfo[$uid];
    }
}