public function updateData($overviews)
    {
        // helpers
        $queryHelper = $this->getContainer()->get('kunstmaan_dashboard.helper.google.analytics.query');
        $configHelper = $this->getContainer()->get('kunstmaan_dashboard.helper.google.analytics.config');
        $metrics = new MetricsCommandHelper($configHelper, $queryHelper, $this->output, $this->em);
        $chartData = new ChartDataCommandHelper($configHelper, $queryHelper, $this->output, $this->em);
        $goals = new GoalCommandHelper($configHelper, $queryHelper, $this->output, $this->em);
        $visitors = new UsersCommandHelper($configHelper, $queryHelper, $this->output, $this->em);

        // get data per overview
        foreach ($overviews as $overview) {
            $configHelper->init($overview->getConfig()->getId());
            /* @var AnalyticsOverview $overview */
            $this->output->writeln('Fetching data for overview "<fg=green>' . $overview->getTitle() . '</fg=green>"');

            try {
                // metric data
                $metrics->getData($overview);
                if ($overview->getSessions()) { // if there are any visits
                    // day-specific data
                    $chartData->getData($overview);

                    // get goals
                    $goals->getData($overview);

                    // visitor types
                    $visitors->getData($overview);
                } else {
                    // reset overview
                    $this->reset($overview);
                    $this->output->writeln("\t" . 'No visitors');
                }
                // persist entity back to DB
                $this->output->writeln("\t" . 'Persisting..');
                $this->em->persist($overview);
                $this->em->flush($overview);

                $this->em->getRepository('KunstmaanDashboardBundle:AnalyticsConfig')->setUpdated($overview->getConfig()->getId());
            } catch (\Google_ServiceException $e) {
                $error = explode(')', $e->getMessage());
                $error = $error[1];
                $this->output->writeln("\t" . '<fg=red>Invalid segment: </fg=red>' .$error);
                $this->errors += 1;
            }
        }
    }