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; }