public function canPostWithoutCaptcha(PermissionUser $user)
{
// Check if site requires captchas.
if (!site_setting('captchaEnabled')) {
return true;
}
if (!$user->isAccountable()) {
return false;
}
// Check if this user can bypass captchas.
if ($user->canPostWithoutCaptcha($this)) {
return true;
}
// Begin to check captchas for last answers.
$ip = new IP();
$session_id = Session::getId();
$lastCaptcha = Captcha::select('created_at', 'cracked_at')->where(function ($query) use($ip, $session_id) {
// Find captchas answered by this user.
$query->where('client_session_id', hex2bin($session_id));
// Pull the lifespan of a captcha.
// This is the number of minutes between successful entries.
$captchaLifespan = (int) site_setting('captchaLifespanTime', 0);
if ($captchaLifespan > 0) {
$query->whereNotNull('cracked_at');
$query->where('cracked_at', '>=', \Carbon\Carbon::now()->subMinutes($captchaLifespan));
}
})->orderBy('cracked_at', 'desc')->first();
$requireCaptcha = !$lastCaptcha instanceof Captcha;
if (!$requireCaptcha) {
$captchaLifespan = (int) site_setting('captchaLifespanPosts');
if ($captchaLifespan > 0) {
$postsWithCaptcha = Post::select('created_at')->where('author_ip', $ip->toText())->where('created_at', '>=', $lastCaptcha->created_at)->count();
$requireCaptcha = $postsWithCaptcha >= $captchaLifespan;
}
}
return !$requireCaptcha;
}
