/**
* Rate Limiting
* http://stackoverflow.com/a/668327/670662
* @param string $id
* @return boolean
*/
public function check($id, $use = 1.0)
{
$rate = $this->maxRequests / $this->period;
$t_key = $this->keyTime($id);
$a_key = $this->keyAllow($id);
if ($this->adapter->exists($t_key)) {
$c_time = time();
$time_passed = $c_time - $this->adapter->get($t_key);
$this->adapter->set($t_key, $c_time, $this->ttl);
$allow = $this->adapter->get($a_key);
$allow += $time_passed * $rate;
if ($allow > $this->maxRequests) {
$allow = $this->maxRequests;
}
if ($allow < 1.0) {
$this->adapter->set($a_key, $allow, $this->ttl);
return 0;
} else {
$allow -= $use;
$this->adapter->set($a_key, $allow, $this->ttl);
return (int) ceil($allow);
}
} else {
$allow = $this->maxRequests - $use;
$this->adapter->set($t_key, time(), $this->ttl);
$this->adapter->set($a_key, $allow, $this->ttl);
return (int) ceil($allow);
}
}
public function set($key, $value, $ttl = null, array $options = []) : bool
{
$key = array_key_exists('noprefix', $options) ? $key : $this->prefix . $key;
return $this->driver->set($key, $value, $ttl, $options);
}
