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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
*
* @category Piwik
* @package Piwik
*/
/**
* Add a new 'metadata' column to the table based on the value resulting
* from a callback function with the parameter being another column's value
*
* For example from the "label" column we can to create an "icon" 'metadata' column
* with the icon URI built from the label (LINUX => UserSettings/icons/linux.png)
*
* @package Piwik
* @subpackage Piwik_DataTable
*/
class Piwik_DataTable_Filter_ColumnCallbackAddMetadata extends Piwik_DataTable_Filter
{
private $columnToRead;
private $functionToApply;
private $functionParameters;
private $metadataToAdd;
private $applyToSummaryRow;
/**
* @param Piwik_DataTable $table
* @param $columnToRead
* @param $metadataToAdd
* @param null $functionToApply
* @param null $functionParameters
*/
public function __construct( $table, $columnToRead, $metadataToAdd, $functionToApply = null,
$functionParameters = null, $applyToSummaryRow = true )
{
parent::__construct($table);
$this->functionToApply = $functionToApply;
$this->functionParameters = $functionParameters;
$this->columnToRead = $columnToRead;
$this->metadataToAdd = $metadataToAdd;
$this->applyToSummaryRow = $applyToSummaryRow;
}
/**
* Filters the given data table
*
* @param Piwik_DataTable $table
*/
public function filter($table)
{
foreach($table->getRows() as $key => $row)
{
if (!$this->applyToSummaryRow && $key == Piwik_DataTable::ID_SUMMARY_ROW)
{
continue;
}
$oldValue = $row->getColumn($this->columnToRead);
$parameters = array($oldValue);
if(!is_null($this->functionParameters))
{
$parameters = array_merge($parameters, $this->functionParameters);
}
if(!is_null($this->functionToApply))
{
$newValue = call_user_func_array( $this->functionToApply, $parameters);
}
else
{
$newValue = $oldValue;
}
if ($newValue !== false)
{
$row->addMetadata($this->metadataToAdd, $newValue);
}
}
}
}
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