Recently, i started developing my first piwik plugin, which displays data (currenlty unique visitors only) for weekdays. In the current state it works quite well, except the data can only be display on a simple table. However, i have no idea why it is not working as VertGraph. I compared my code with some other plugins, but found no greater differences, but the kind the figures are fetched. While the other plugins generate the archive directly i use the Visits Summary API and bring it together in the DataTable. Do i do something wrong?
Error message and code snippet below.
Open Flash Chart
JSON Parse Error [Syntax Error]
Error at character 1, line 2:
0: 1:
Warning: Division by zero in /My/Parh/To/Piwik/core/Visualization/Chart/VerticalBar.php on line 65
protected function getDataTable($name, $idSite, $period, $date )
{
Piwik::checkUserHasViewAccess( $idSite );
$date = Piwik_Date::factory($date);
$dataTable = new Piwik_DataTable();
$weekdayKey = 'Weekday';
$visitorKey = 'Unique Visitors';
$idx = 'RowIndex';
$uniqueVisitors = array(array($idx => 0, $weekdayKey => 'Mon', $visitorKey => 0),
array($idx => 1, $weekdayKey => 'Tue', $visitorKey => 0),
array($idx => 2, $weekdayKey => 'Wed', $visitorKey => 0),
array($idx => 3, $weekdayKey => 'Thu', $visitorKey => 0),
array($idx => 4, $weekdayKey => 'Fri', $visitorKey => 0),
array($idx => 5, $weekdayKey => 'Sat', $visitorKey => 0),
array($idx => 6, $weekdayKey => 'Sun', $visitorKey => 0),
);
$requestStringTemplate = 'method=VisitsSummary.getUniqueVisitors&idSite=' . $idSite . '&date={DATE}&period=day&format=original';
switch ($period)
{
case 'year':
$weeks = 52;
break;
case 'day':
case 'week':
$weeks = 1;
break;
case 'month':
default:
$weeks = 4;
}
#get the values for the past four weeks
$days = $weeks * 7;
for($i = 0; $i < $days; $i++)
{
$requestString = str_replace('{DATE}', $date->toString(), $requestStringTemplate);
$request = new Piwik_API_Request($requestString);
$iWeekday = $date->toString('N')-1;
$uniqueVisitors[$iWeekday][$visitorKey] += $request->process();
$date = $date->subDay(1);
}
$dataTable->addRowsFromSimpleArray($uniqueVisitors);
return $dataTable;
}