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<?php

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    highlight_file(__FILE__);

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/*

*

* This script is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General public License for more details.

*

* This copyright notice MUST APPEAR in all copies of the script!

*

*  @author            CERDAN Yohann <cerdanyohann@yahoo.fr>

*  @copyright      (c) 2009  CERDAN Yohann, All rights reserved

*  @ version         12:38 04/08/2009

*/

class GoogleAnalyticsAPI

{

	/** Google account login (email) **/

	private $login;

	/** Google account password **/

	private $password;

	/** Google analytics website ID (avalaible on your google analytics account url) **/

	private $ids;

	/** The login token to the google analytics service **/

	private $loginToken;

	/** The XML response send by the service **/

	private $response;

	/** Begin date of the displaying datas **/

	private $date_begin;

	/** End date of the displaying datas **/

	private $date_end;

	/** Sort the results **/

	private $sort;

	/** The param to sort (metrics or dimensions) **/

	private $sort_param;

	/**

          * Class constructor

          *

          * @param string $login the login (email)

          * @param string $password the password

          * @param string $ids the IDs of the website (find it in the google analytics gui)

          * @param string $date_begin the begin date

          * @param string $date_end the end date

          *

          * @return void

          */

	public function __construct($login,$password,$ids,$date_begin,$date_end = null)

	{

		$this->login = $login;

		$this->password = $password;

		$this->ids = $ids;

		$this->date_begin = $date_begin;

		if (!$date_end) {

			$this->date_end = $date_begin;

		} else {

			$this->date_end = $date_end;

		}

		$this->sort = "-";

		$this->sort_param = "metrics";

		// Authentication

		$this->login();

	}

	/**

          * Set the result's sort by metrics

          *

          * @param boolean $sort asc or desc sort

          *

          * @return void

          */

	public function setSortByMetrics ($sort)

	{

		if ($sort==true) {

			$this->sort = "";

		} else {

			$this->sort = "-";

		}

		$this->sort_param = 'metrics';

	}

	/**

          * Set the result's sort by dimensions

          *

          * @param boolean $sort asc or desc sort

          *

          * @return void

          */

	public function setSortByDimensions ($sort)

	{

		if ($sort==true) {

			$this->sort = "";

		} else {

			$this->sort = "-";

		}

		$this->sort_param = 'dimensions';

	}

	/**

          * Set the IDs of the website

          *

          * @param string $ids the IDs of the website (find it in the google analytics gui)

          *

          * @return void

          */

	public function setIds($ids)

	{

		$this->ids = $ids;

	}

	/**

          * Set the date of the export

          *

          * @param string $date_begin the begin date

          * @param string $date_end the end date

          *

          * @return void

          */

	public function setDate ($date_begin,$date_end = null)

	{

		$this->date_begin = $date_begin;

		if (!$date_end) {

			$this->date_end = $date_begin;

		} else {

			$this->date_end = $date_end;

		}

	}

	/**

          * Login to the google server

          * See : http://google-data-api.blogspot.com/2008/05/clientlogin-with-php-curl.html

          *

          * @return void

          */

	private function login()

	{

		$ch = curl_init();

		curl_setopt($ch, CURLOPT_URL, "https://www.google.com/accounts/ClientLogin");

		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

		$data = array('accountType' => 'GOOGLE',

				  'Email' => $this->login,

				  'Passwd' => $this->password,

				  'source'=>'php_curl_analytics',

				  'service'=>'analytics');

		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);

		curl_setopt($ch, CURLOPT_POST, true);

		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

		curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

		$hasil = curl_exec($ch);

		curl_close($ch);

		// Get the login token

		// SID=DQA...oUE

		// LSID=DQA...bbo

		// Auth=DQA...Sxq

		if (preg_match('/Auth=(.*)$/',$hasil,$matches)>0) {

			$this->loginToken = $matches[1];

		} else {

			trigger_error('Authentication problem',E_USER_WARNING);

			return null;

		}

	}

	/**

           * Get URL content using cURL.

          *

          * @param string $url the url

          *

          * @return string the html code

          */

	function getContent ($url)

	{

		if (!extension_loaded('curl')) {

            throw new Exception('curl extension is not available');

        }

		$ch = curl_init($url);

		$header[] = 'Authorization: GoogleLogin auth=' . $this->loginToken;

		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);

		curl_setopt($ch, CURLOPT_HTTPHEADER, $header);

		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

		curl_setopt($ch, CURLOPT_HEADER, false);

		$this->response = curl_exec($ch);

		$infos = curl_getinfo($ch);

		curl_close($ch);

		return $infos['http_code'];

	}

	/**

          * Get the google analytics datas by dimensions and metrics

          * See : http://code.google.com/intl/fr/apis/analytics/docs/gdata/gdataReferenceDimensionsMetrics.html

          *

          * @param string $metrics the metrics

          * @param string $dimensions the dimensions

          *

          * @return array

          */

	public function getDimensionByMetric($metrics, $dimensions)

	{

		$url = "https://www.google.com/analytics/feeds/data?ids=ga:" . $this->ids . "&metrics=ga:" . $metrics . "&dimensions=ga:" . $dimensions . "&start-date=" . $this->date_begin . "&end-date=" . $this->date_end ."&sort=" . $this->sort . "ga:";

		if ($this->sort_param=='metrics') { // sort by metrics

			$url .= $metrics;

		}

		if ($this->sort_param=='dimensions') { // sort by dimensions

			$url .= $dimensions;

		}

		if($this->getContent($url) == 200) {

			$XML_object = simplexml_load_string($this->response);

			$labels_array = array();

			$datas_array = array();

			foreach($XML_object->entry as $m) {

				$dxp = $m->children('http://schemas.google.com/analytics/2009');

				$metric_att = $dxp->metric->attributes();

				$dimension_att = $dxp->dimension->attributes();

				$labels_array []= $dimension_att['value'] . ' (' . $metric_att['value'] . ')';

				$datas_array  []= (string)$metric_att['value'];

			}

			return array('labels' => $labels_array, 'datas' => $datas_array);

		} else {

			return null;

		}

	}

	/**

          * Get the google analytics datas by metrics

          * See : http://code.google.com/intl/fr/apis/analytics/docs/gdata/gdataReferenceDimensionsMetrics.html

          *

          * @param string $metrics the metrics

          * @param string $uri the url of the website page (ex : /myurl/)

          *

          * @return array

          */

	public function getMetric($metric,$uri=null)

	{

		$url = "https://www.google.com/analytics/feeds/data?ids=ga:" . $this->ids . "&metrics=ga:" . $metric . "&start-date=" . $this->date_begin . "&end-date=" . $this->date_end;

		if ($uri) {

			$url .= "&dimensions=ga:pagePath&filters=ga:pagePath%3D%3D" . $uri;

		}

		if($this->getContent($url) == 200) {

			$XML_object = simplexml_load_string($this->response);

			$dxp = $XML_object->entry->children('http://schemas.google.com/analytics/2009');

			if (@count($dxp)>0) {

				$metric_att = $dxp->metric->attributes();

			}

			return $metric_att['value'] ? (string)$metric_att['value'] : 0;

		} else {

			return null;

		}

	}

}

?>