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<?php
/**
* Piwik - Open source web analytics
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html Gpl v3 or later
* @version $Id$
*
* @category Piwik
* @package Piwik
*/
/**
* Piwik_ViewDataTable_GenerateGraphData for the Evolution graph (eg. Last 30 days visits) using Piwik_Visualization_Chart_Evolution
*
* @package Piwik
* @subpackage Piwik_ViewDataTable
*/
class Piwik_ViewDataTable_GenerateGraphData_ChartEvolution extends Piwik_ViewDataTable_GenerateGraphData
{
protected function getViewDataTableId()
{
return 'generateDataChartEvolution';
}
function __construct()
{
$this->view = new Piwik_Visualization_Chart_Evolution();
}
protected function guessUnitFromRequestedColumnNames($requestedColumnNames)
{
$nameToUnit = array(
'_rate' => '%',
'_revenue' => Piwik::getCurrency(),
);
foreach($requestedColumnNames as $columnName)
{
foreach($nameToUnit as $pattern => $type)
{
if(strpos($columnName, $pattern) !== false)
{
return $type;
}
}
}
return false;
}
protected function initChartObjectData()
{
// if the loaded datatable is a simple DataTable, it is most likely a plugin plotting some custom data
// we don't expect plugin developers to return a well defined Piwik_DataTable_Array
if($this->dataTable instanceof Piwik_DataTable)
{
return parent::initChartObjectData();
}
$this->dataTable->applyQueuedFilters();
if(!($this->dataTable instanceof Piwik_DataTable_Array))
{
throw new Exception("Expecting a DataTable_Array with custom format to draw an evolution chart");
}
// the X label is extracted from the 'period' object in the table's metadata
$xLabels = $uniqueIdsDataTable = array();
foreach($this->dataTable->metadata as $idDataTable => $metadataDataTable)
{
//eg. "Aug 2009"
$xLabels[] = html_entity_decode($metadataDataTable['period']->getLocalizedShortString(), ENT_COMPAT, 'UTF-8');
// we keep track of all unique data table that we need to set a Y value for
$uniqueIdsDataTable[] = $idDataTable;
}
$requestedColumnNames = $this->getColumnsToDisplay();
$yAxisLabelToValue = array();
foreach($this->dataTable->getArray() as $idDataTable => $dataTable)
{
foreach($dataTable->getRows() as $row)
{
$rowLabel = $row->getColumn('label');
foreach($requestedColumnNames as $requestedColumnName)
{
$metricLabel = $this->getColumnTranslation($requestedColumnName);
if($rowLabel !== false)
{
// eg. "Yahoo! (Visits)"
$yAxisLabel = "$rowLabel ($metricLabel)";
}
else
{
// eg. "Visits"
$yAxisLabel = $metricLabel;
}
if(($columnValue = $row->getColumn($requestedColumnName)) !== false)
{
$yAxisLabelToValue[$yAxisLabel][$idDataTable] = $columnValue;
}
}
}
}
// make sure all column values are set to at least zero (no gap in the graph)
$yAxisLabelToValueCleaned = array();
$yAxisLabels = array();
foreach($uniqueIdsDataTable as $uniqueIdDataTable)
{
foreach($yAxisLabelToValue as $yAxisLabel => $idDataTableToColumnValue)
{
$yAxisLabels[$yAxisLabel] = $yAxisLabel;
if(isset($idDataTableToColumnValue[$uniqueIdDataTable]))
{
$columnValue = $idDataTableToColumnValue[$uniqueIdDataTable];
}
else
{
$columnValue = 0;
}
$yAxisLabelToValueCleaned[$yAxisLabel][] = $columnValue;
}
}
$unit = $this->yAxisUnit;
if(empty($unit))
{
$unit = $this->guessUnitFromRequestedColumnNames($requestedColumnNames);
}
$this->view->setAxisXLabels($xLabels);
$this->view->setAxisYValues($yAxisLabelToValueCleaned);
$this->view->setAxisYLabels($yAxisLabels);
$this->view->setAxisYUnit($unit);
$firstDatatable = reset($this->dataTable->metadata);
$period = $firstDatatable['period'];
switch($period->getLabel()) {
case 'day': $steps = 7; break;
case 'week': $steps = 10; break;
case 'month': $steps = 6; break;
case 'year': $steps = 2; break;
default: $steps = 10; break;
}
$this->view->setXSteps($steps);
if($this->isLinkEnabled())
{
$axisXOnClick = array();
foreach($this->dataTable->metadata as $idDataTable => $metadataDataTable)
{
$period = $metadataDataTable['period'];
$dateInUrl = $period->getDateStart();
$link = Piwik_Url::getCurrentUrlWithoutQueryString() .
'?' .
Piwik_Url::getQueryStringFromParameters( array(
'module' => 'CoreHome',
'action' => 'index',
'idSite' => Piwik_Common::getRequestVar('idSite'),
'period' => $period->getLabel(),
'date' => $dateInUrl,
));
$axisXOnClick[] = $link;
}
$this->view->setAxisXOnClick($axisXOnClick);
}
}
private function isLinkEnabled()
{
static $linkEnabled;
if(!isset($linkEnabled))
{
$linkEnabled = !Piwik_Common::getRequestVar('disableLink', 0, 'int');
}
return $linkEnabled;
}
}
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