Piwik\Plugins\UserCountry\Columns\Country::onNewVisit PHP Method

    public function onNewVisit(Request $request, Visitor $visitor, $action)
    {
        $value = $this->getUrlOverrideValueIfAllowed('country', $request);
        if ($value !== false) {
            return $value;
        }
        $userInfo = $this->getUserInfo($request, $visitor);
        $country = $this->getLocationDetail($userInfo, LocationProvider::COUNTRY_CODE_KEY);
        if (!empty($country) && $country != Visit::UNKNOWN_CODE) {
            return strtolower($country);
        }
        $country = $this->getCountryUsingProviderExtensionIfValid($userInfo['ip']);
        if (!empty($country)) {
            return $country;
        }
        return Visit::UNKNOWN_CODE;
    }