PHP使用redis位图bitMap 实现签到功能(2)

<?php
namespace app\common\redis\db1;
/**
 * redis操作类
 */
class RedisAbstract
{
  /**
   * 连接的库
   * @var int
   */
  protected $_db = 1;//数据库名
  protected $_tableName = '';//表名
  static $redis = null;
  public function __construct()
  {
    return $this->getRedis();
  }
  public function _calcKey($id)
  {
    return $this->_tableName . $id;
  }
  /**
   * 查找key
   * @param $key
   * @return array
   * @throws \Exception
   * @author wenzhen-chen
   */
  public function keys($key)
  {
    return $this->getRedis()->keys($this->_calcKey($key));
  }
  /**
   * 获取是否开启缓存的设置参数
   *
   * @return boolean
   */
  public function _getEnable()
  {
    $conf = Config('redis');
    return $conf['enable'];
  }
  /**
   * 获取redis连接
   *
   * @staticvar null $redis
   * @return \Redis
   * @throws \Exception
   */
  public function getRedis()
  {
    if (!self::$redis) {
      $conf = Config('redis');
      if (!$conf) {
        throw new \Exception('redis连接必须设置');
      }
      self::$redis = new \Redis();
      self::$redis->connect($conf['host'], $conf['port']);
      self::$redis->select($this->_db);
    }
    return self::$redis;
  }
  /**
   * 设置位图
   * @param $key
   * @param $offset
   * @param $value
   * @param int $time
   * @return int|null
   * @throws \Exception
   * @author wenzhen-chen
   */
  public function setBit($key, $offset, $value, $time = 0)
  {
    if (!$this->_getEnable()) {
      return null;
    }
    $result = $this->getRedis()->setBit($key, $offset, $value);
    if ($time) {
      $this->getRedis()->expire($key, $time);
    }
    return $result;
  }
  /**
   * 获取位图
   * @param $key
   * @param $offset
   * @return int|null
   * @throws \Exception
   * @author wenzhen-chen
   */
  public function getBit($key, $offset)
  {
    if (!$this->_getEnable()) {
      return null;
    }
    return $this->getRedis()->getBit($key, $offset);
  }
  /**
   * 统计位图
   * @param $key
   * @return int|null
   * @throws \Exception
   * @author wenzhen-chen
   */
  public function bitCount($key)
  {
    if (!$this->_getEnable()) {
      return null;
    }
    return $this->getRedis()->bitCount($key);
  }
  /**
   * 位图操作
   * @param $operation
   * @param $retKey
   * @param mixed ...$key
   * @return int|null
   * @throws \Exception
   * @author wenzhen-chen
   */
  public function bitOp($operation, $retKey, ...$key)
  {
    if (!$this->_getEnable()) {
      return null;
    }
    return $this->getRedis()->bitOp($operation, $retKey, $key);
  }
  /**
   * 计算在某段位图中 1或0第一次出现的位置
   * @param $key
   * @param $bit 1/0
   * @param $start
   * @param null $end
   * @return int|null
   * @throws \Exception
   * @author wenzhen-chen
   */
  public function bitPos($key, $bit, $start, $end = null)
  {
    if (!$this->_getEnable()) {
      return null;
    }
    return $this->getRedis()->bitpos($key, $bit, $start, $end);
  }
  /**
   * 删除数据
   * @param $key
   * @return int|null
   * @throws \Exception
   * @author wenzhen-chen
   */
  public function del($key)
  {
    if (!$this->_getEnable()) {
      return null;
    }
    return $this->getRedis()->del($key);
  }
}