public function buildChart($oAnalytics) {
require_once 'lib/google_chart.php'; // By Andrey Savchenko (Rarst), http://www.rarst.net/script/google-chart/
// Generating visit arrays for the date range.
$visit_report = $oAnalytics->getData(
array('dimensions'=>urlencode('ga:date'),
'metrics'=>urlencode('ga:visits'),
));
$visits = array();
foreach($visit_report as $dimensions => $metric) {
array_push($visits, $metric);
}
// Generating visit arrays for the date range.
$views_report = $oAnalytics->getData(
array('dimensions'=>urlencode('ga:date'),
'metrics'=>urlencode('ga:pageviews'),
));
$page_views = array();
foreach($views_report as $dimensions => $metric) {
array_push($page_views, $metric);
}
// Extract various dates from the report array keys in order to use them as variables for x-axis labels
$days = array_keys($views_report);
list($d0, $d1, $d2, $d3, $d4, $d5, $d6, $d7, $d8, $d9, $d10, $d11, $d12, $d13,
$d14, $d15, $d16, $d17, $d18, $d19, $d20, $d21,$d22,$d23,$d24,$d25,$d26,$d27,$d28, $d29, $d30) = $days;
// Get the keys for max. values of page views and visits
if( !function_exists('max_key') ){
function max_key($array) {
foreach ($array as $key => $val) {
if ($val == max($array)) return $key;
}
}
}
$array = $page_views;
$precord = max_key($array);
$array = $visits;
$vrecord = max_key($array);
// Always use max. value recorded in array for y-axis
$ymax = 1*(ceil(max($page_views)));
// Devide it by six and round up to nearest whole number to set appropriate y-axis ticks
$ytick = ceil((max($page_views))/6);
// Chart settings
$traffic = new GoogleChart;
$traffic->type='lc';
$traffic->SetImageSize(700,200);
$traffic->SetChartMargins(20,20,20,20);
$traffic->SetEncode('simple');
$traffic->AddData($visits);
$traffic->AddData($page_views);
$traffic->AddChartColor('FF9900');
$traffic->AddChartColor('0077CC');
$traffic->AddLineStyle(3);
$traffic->AddLineStyle(3);
$traffic->AddFillArea('B','FF99007F',0);
$traffic->AddFillArea('b','E6F2FA7F',0,1);
$traffic->AddShapeMarker('o','FFFFFF',0,-1,9);
$traffic->AddShapeMarker('o','FF9900',0,-1,7);
$traffic->AddShapeMarker('o','FFFFFF',1,-1,9);
$traffic->AddShapeMarker('o','0077CC',1,-1,7);
$traffic->AddAxis('y,x');
$traffic->AddAxisRange(0,round($ymax,-3),round($ytick, -3));
$traffic->AddAxisLabel(extension_dashboard_analytics::formatDates(array($d0,$d10,$d20,$d30)),1);
$traffic->SetGrid(round(100/30,2),round(100/6,2),1,3);
$traffic->SetTitle('Visits and Page Views of last 30 days');
$traffic->AddLegend('visits');
$traffic->AddLegend('page views');
$traffic->SetLegendPosition('b');
// Generate chart URL
$graph = new XMLElement('div', $traffic->GetImg());
$graph->setAttribute('class', 'graph');
return $graph;
}