<?php
if (!defined('BASEPATH'))
  exit('No direct script access allowed');

class Gaapi extends CI_Controller
{

  function __construct()
  {
    parent::__construct();
    $this->permission->is_admin();
    $this->site_code = $this->config->item('site_code');
    //ga verder
    $this->load->library('MY_Composer');
  }

  public function user_track()
  {
	$cid = $this->input->get_post('cid');
    $analytics = $this->initializeAnalytics();
    $response = $this->getReport($analytics, $cid);
    $this->printResults($response);
  }


  /**
 * Initializes an Analytics Reporting API V4 service object.
 *
 * @return An authorized Analytics Reporting API V4 service object.
 */
  function initializeAnalytics()
  {

    // Use the developers console and download your service account
    // credentials in JSON format. Place them in this directory or
    // change the key file location if necessary.
    $KEY_FILE_LOCATION = __DIR__ . '/gaapi_json/sylvan-box-234910-357cb59e6bf0.json';

    // Create and configure a new client object.
    $client = new Google_Client();
    $client->setApplicationName("User Tracker");
    $client->setAuthConfig($KEY_FILE_LOCATION);
    $client->setScopes(['https://www.googleapis.com/auth/analytics.readonly']);
    $analytics = new Google_Service_AnalyticsReporting($client);

    return $analytics;
  }


  /**
 * Queries the Analytics Reporting API V4.
 *
 * @param service An authorized Analytics Reporting API V4 service object.
 * @return The Analytics Reporting API V4 response.
 */
  function getReport($analytics, $cid_no)
  {
	//die($cid);

    // Replace with your view ID, for example XXXX.
    $VIEW_ID = "68484932";

    // Create the DateRange object.
    $dateRange = new Google_Service_AnalyticsReporting_DateRange();
    $dateRange->setStartDate("30daysAgo");
    $dateRange->setEndDate("today");

    // Create the Metrics object.
    $pv = new Google_Service_AnalyticsReporting_Metric();
    $pv->setExpression("ga:pageviews");
    $pv->setAlias("pageviews");

    //Create the dimensions
    $pageUrl = new Google_Service_AnalyticsReporting_Dimension();
    $pageUrl->setName("ga:pagePath");
    $cid = new Google_Service_AnalyticsReporting_Dimension();
    $cid->setName("ga:dimension1");
    $hitTime = new Google_Service_AnalyticsReporting_Dimension();
    $hitTime->setName("ga:dimension3");
	$ip = new Google_Service_AnalyticsReporting_Dimension();
    $ip->setName("ga:dimension3");

	// Create Dimension Filter 1
    $cidFilter = new Google_Service_AnalyticsReporting_DimensionFilter();
    $cidFilter->setDimensionName("ga:dimension1");
    $cidFilter->setOperator('EXACT');
    $cidFilter->setExpressions($cid_no);
	
	// Create the DimensionFilterClauses
    $dimensionFilterClause = new Google_Service_AnalyticsReporting_DimensionFilterClause();
    $dimensionFilterClause->setFilters(array($cidFilter));

	// OrderBy maybe some bugs
	$order = new Google_Service_AnalyticsReporting_OrderBy;
	$order->setFieldName("ga:dimension3");
	$order->setOrderType("VALUE");
	$order->setSortOrder("DESCENDING");

    // Create the ReportRequest object.
    $request = new Google_Service_AnalyticsReporting_ReportRequest();
    $request->setViewId($VIEW_ID);
    $request->setDateRanges($dateRange);
    $request->setMetrics(array($pv));
    $request->setDimensions(array($pageUrl, $cid, $hitTime));
	$request->setDimensionFilterClauses(array($dimensionFilterClause));
	$request->setOrderBys(array($order));

    $body = new Google_Service_AnalyticsReporting_GetReportsRequest();
    $body->setReportRequests(array($request));
    return $analytics->reports->batchGet($body);
  }


  /**
   * Parses and prints the Analytics Reporting API V4 response.
   *
   * @param An Analytics Reporting API V4 response.
   */
  function printResults($reports)
  {
	$alais_array = array(
	  "ga:dimension1" => "cid",
	  "ga:dimension3" => "hitTime",
	  "ga:pagePath" => "path"
	);
	$rs_array = array();
    for ($reportIndex = 0; $reportIndex < count($reports); $reportIndex++) {
      $report = $reports[$reportIndex];
      $header = $report->getColumnHeader();
      $dimensionHeaders = $header->getDimensions();
      $metricHeaders = $header->getMetricHeader()->getMetricHeaderEntries();
      $rows = $report->getData()->getRows();
	  $rs_row = array();
      for ($rowIndex = 0; $rowIndex < count($rows); $rowIndex++) {
        $row = $rows[$rowIndex];
        $dimensions = $row->getDimensions();
        $metrics = $row->getMetrics();
        for ($i = 0; $i < count($dimensionHeaders) && $i < count($dimensions); $i++) {
          //print($dimensionHeaders[$i] . ": " . $dimensions[$i] . "\n");
		  $rs_row[$alais_array[$dimensionHeaders[$i]]] = $dimensions[$i];
        }

        for ($j = 0; $j < count($metrics); $j++) {
          $values = $metrics[$j]->getValues();
          for ($k = 0; $k < count($values); $k++) {
            $entry = $metricHeaders[$k];
            //print($entry->getName() . ": " . $values[$k] . "\n");
			$rs_row[$entry->getName()] = $values[$k];
          }
        }
		array_push($rs_array, $rs_row);
      }
    }
	echo(json_encode($rs_array));
  }
  
}
//end of gaapi