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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 $Id$
*
* @package Piwik_ViewDataTable
*/
/**
* Reads data from the API and prepares data to give to the renderer Piwik_Visualization_Chart.
* This class is used to generate the data for the FLASH charts. It is given as a parameter of the SWF file.
* You can set the number of elements to appear in the graph using: setGraphLimit();
* Example:
* <pre>
* function getWebsites( $fetch = false)
* {
* $view = Piwik_ViewDataTable::factory();
* $view->init( $this->pluginName, 'getWebsites', 'Referers.getWebsites', 'getUrlsFromWebsiteId' );
* $view->setColumnsToDisplay( array('label','nb_visits') );
* $view->setLimit(10);
* $view->setGraphLimit(12);
* return $this->renderView($view, $fetch);
* }
* </pre>
*
* @package Piwik_ViewDataTable
*
*/
abstract class Piwik_ViewDataTable_GenerateGraphData extends Piwik_ViewDataTable
{
/**
* @see Piwik_ViewDataTable::init()
*/
function init($currentControllerName,
$currentControllerAction,
$moduleNameAndMethod )
{
parent::init($currentControllerName,
$currentControllerAction,
$moduleNameAndMethod );
}
/**
* Number of elements to display in the graph.
*
* @var int
*/
protected $graphLimit = 5;
/**
* Sets the number max of elements to display (number of pie slice, vertical bars, etc.)
* If the data has more elements than $limit then the last part of the data will be the sum of all the remaining data.
*
* @param int $limit
*/
function setGraphLimit( $limit )
{
$this->graphLimit = $limit;
}
/**
* Returns numbers of elemnts to display in the graph
*
* @return int
*/
function getGraphLimit()
{
return $this->graphLimit;
}
public function main()
{
if($this->mainAlreadyExecuted)
{
return;
}
$this->mainAlreadyExecuted = true;
$this->setLimit(-1);
// we load the data with the filters applied
$this->loadDataTableFromAPI();
$offsetStartSummary = $this->getGraphLimit() - 1;
$this->dataTable->queueFilter('Piwik_DataTable_Filter_AddSummaryRow',array($offsetStartSummary));
$this->dataAvailable = $this->dataTable->getRowsCount() != 0;
if(!$this->dataAvailable)
{
$this->view->customizeGraph();
$this->view->title(Piwik_Translate('General_NoDataForGraph'), '{font-size: 25px;}');
}
else
{
$data = $this->generateDataFromDataTable();
$this->view->setData($data);
$this->view->customizeGraph();
}
}
/**
* Returns a format friendly array from the dataTable
*
* @return array
*/
protected function generateDataFromDataTable()
{
$this->dataTable->applyQueuedFilters();
// We apply a filter to the DataTable, decoding the label column (useful for keywords for example)
$filter = new Piwik_DataTable_Filter_ColumnCallbackReplace(
$this->dataTable,
'label',
'urldecode'
);
$data = array();
foreach($this->dataTable->getRows() as $row)
{
$label = $row->getColumn('label');
$value = $row->getColumn('nb_uniq_visitors');
// case no unique visitors
if($value === false)
{
$value = $row->getColumn('nb_visits');
}
$data[] = array(
'label' => $label,
'value' => $value,
'url' => $row->getMetadata('url'),
);
}
return $data;
}
}
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