<?php
namespace Aws\EndpointDiscovery;
class EndpointList
{
private $active;
private $expired = [];
public function __construct(array $endpoints)
{
$this->active = $endpoints;
reset($this->active);
}
/**
* Gets an active (unexpired) endpoint. Returns null if none found.
*
* @return null|string
*/
public function getActive()
{
if (count($this->active) < 1) {
return null;
}
while (time() > current($this->active)) {
$key = key($this->active);
$this->expired[$key] = current($this->active);
$this->increment($this->active);
unset($this->active[$key]);
if (count($this->active) < 1) {
return null;
}
}
$active = key($this->active);
$this->increment($this->active);
return $active;
}
/**
* Gets an active endpoint if possible, then an expired endpoint if possible.
* Returns null if no endpoints found.
*
* @return null|string
*/
public function getEndpoint()
{
if (!empty($active = $this->getActive())) {
return $active;
}
return $this->getExpired();
}
/**
* Removes an endpoint from both lists.
*
* @param string $key
*/
public function remove($key)
{
unset($this->active[$key]);
unset($this->expired[$key]);
}
/**
* Get an expired endpoint. Returns null if none found.
*
* @return null|string
*/
private function getExpired()
{
if (count($this->expired) < 1) {
return null;
}
$expired = key($this->expired);
$this->increment($this->expired);
return $expired;
}
private function increment(&$array)
{
if (next($array) === false) {
reset($array);
}
}
}