/**
* Get user avatar, if no one present - uses Gravatar
*
* @param int|null $size Avatar size, if not specified or resizing is not possible - original image is used
* @param bool|int $user If not specified - current user assumed
*
* @return string
*/
function avatar($size = null, $user = false)
{
$user = (int) ($user ?: $this->id);
$avatar = $this->get('avatar', $user);
if (!$avatar && $this->id != self::GUEST_ID) {
$avatar = 'https://www.gravatar.com/avatar/' . md5($this->get('email', $user)) . "?d=mm&s={$size}";
$avatar .= '&d=' . urlencode(Config::instance()->base_url() . '/includes/img/guest.gif');
}
if (!$avatar) {
$avatar = '/includes/img/guest.gif';
}
return h::prepare_url($avatar, true);
}
