/**
* Sets the shared max age cache control directive
*
* This will make your response public
* @param boolean $flag Set to false to unset the directive, true or any value sets it
* @return null
* @see setIsPublic()
*/
public function setSharedMaxAge($seconds = null)
{
if ($seconds === null) {
$this->headers->removeCacheControlDirective(HeaderContainer::CACHE_CONTROL_SHARED_MAX_AGE);
return;
}
if (!Number::isNumeric($seconds, Number::NOT_NEGATIVE | Number::NOT_FLOAT)) {
throw new ZiboException('The max age should be a unsigned integer');
}
$this->headers->addCacheControlDirective(HeaderContainer::CACHE_CONTROL_SHARED_MAX_AGE, $seconds);
$this->setIsPublic();
}
