<?php

namespace app\common\library\token\driver;

use app\common\library\token\Driver;
use think\Config;

/**
 * Token操作类
 */
class Redis extends Driver
{

    protected array $options = [
        'host'       => '127.0.0.1',
        'port'       => 6379,
        'password'   => '',
        'select'     => 0,
        'timeout'    => 0,
        'persistent' => false,
    ];

    /**
     * 构造函数
     * @throws \BadFunctionCallException
     * @access public
     */
    public function __construct()
    {
        if (!extension_loaded('redis')) {
            throw new \BadFunctionCallException('not support: redis');
        }

        $this->options = array_merge($this->options, \think\Config::get('redis')); // 读取redis的配置信息

        $this->handler = new \Redis;
        if ($this->options['persistent']) {
            $this->handler->pconnect($this->options['host'], $this->options['port'], $this->options['timeout'], 'persistent_id_' . $this->options['select']);
        } else {
            $this->handler->connect($this->options['host'], $this->options['port'], $this->options['timeout']);
        }

        if ('' != $this->options['password']) {
            $this->handler->auth($this->options['password']);
        }

        if (0 != $this->options['select']) {
            $this->handler->select($this->options['select']);
        }
    }

    /**
     * 存储Token
     * @param int $userID 用户ID
     * @param string $token 凭证
     * @return bool
     */
    public function set(int $userID, string $token): bool
    {
        return $this->handler->hSet($this->userTokenKey, $userID, $token);
    }

    /**
     * 获取Token内的信息
     * @param string $token
     * @return  array
     */
    public function get(int $userID): array
    {
        // 判断redis中是否存在
        $value = $this->handler->hGet($this->userTokenKey, $userID);
        if (is_null($value) || false === $value) {
            return [];
        }

        // 解码
        $tokenArr = json_decode($value,true);
        if (is_null($tokenArr) || false === $tokenArr) {
            return [];
        }
        return $tokenArr;
    }

    /**
     * 获取加密后的Token
     * @param int $userID 用户ID
     * @return string
     */
    public function getEncryptedToken(int $userID): string
    {
        // 对json数据进行base64编码
        return base64_encode(json_encode(self::get($userID), JSON_UNESCAPED_UNICODE));
    }

    /**
     * 判断Token是否可用
     * @param string $token Token
     * @param int $userID 会员ID
     * @return  boolean
     */
    public function check(int $userID, string $token): bool
    {
        $data = self::get($userID);
        return $data && $data['user_id'] == $userID && $data['token'] == $token && $data['create_time'] + Config::get('token.duration') > time();
    }

    /**
     * 删除用户的Token
     * @param int $userID 会员ID
     * @return  boolean
     */
    public function delete(int $userID): bool
    {
        $data = $this->get($userID);
        if ($data) {
            $this->handler->hDel($this->userTokenKey, $userID);
        }
        return true;
    }

}