//Include the Google Analytics PHP class and twitterauth classes
require "googleanalytics.class.php";
require 'twitteroauth/twitteroauth.php';

$consumerKey = "XXXXXX";
$consumerSecret = "XXXXXXXXXX";
$oAuthToken = "XXXXXXXXXXXXX";
$oAuthSecret = "XXXXXXXXX";

//File to cache to
$file = 'gabot.txt';
try {
    // create an instance of the GoogleAnalytics class using your own password and username
    $ga = new GoogleAnalytics('XXXX', 'XXXXX');

    //ID is specific to site monitored
    $ga->setProfile('ga:XXXXXXX');
    $website_info = $ga->getWebsiteProfiles();
    // set the date range we want for the report - format is YYYY-MM-DD

    $to = date("Y-m-d", strtotime("now"));
    $from = date("Y-m-d", strtotime('Yesterday'));
    $ga->setDateRange($from, $to);

    // get the report for date, showing pageviews and visits
    $report = $ga->getReport(
            array('dimensions' => urlencode('ga:date'),
                'metrics' => urlencode('ga:pageviews,ga:visits'),
                #'filters'=>urlencode('ga:country=@Canada'),
                'sort' => '-ga:pageviews'
            )
    );

    //convert the associative array to a numeric array so we dont have to use the $from date as a key
    $report_n = array_values($report);
    //what we're going to tweet
    //0 = today 1 = yesterday
    $stats = $website_info[0]['title'] . " today: pageviews: " . $report_n[0]['ga:pageviews'] . " - visits: " . $report_n[0]['ga:visits'];

    //string to write in file
    $string = $report_n[0]['ga:pageviews'] . '#' . $report_n[0]['ga:visits'];


    //difference from yesterday to today
    $visits_difference = $report_n[1]['ga:visits'] - $report_n[0]['ga:visits'];
    $pageviews_difference = $report_n[1]['ga:pageviews'] - $report_n[0]['ga:pageviews'];


    //open the file for the old saved data
    $fh = fopen($file, 'r');
    $data_read = fgets($fh);
    fclose($fh);


    //compare read data to latest data
    if ($data_read != $string) {

        $fh = fopen($file, 'w') or die("can't open file");
        fwrite($fh, $string);
        fclose($fh);

        //tweet!
        $connection = new TwitterOAuth($consumerKey, $consumerSecret, $oAuthToken, $oAuthSecret);
        $connection->get('account/verify_credentials');
        $connection->post('statuses/update', array('status' => $website_info[0]['title'] . " difference: visits: $visits_difference pageviews: $pageviews_difference"));
        
        var_export($connection->http_info);

        echo $stats;
    }
} catch (Exception $e) {
    print 'Error: ' . $e->getMessage();
}

?>