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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
*/
namespace Piwik\DataTable\Filter;
use Piwik\DataTable;
use Piwik\DataTable\Filter;
/**
* Add a new metadata to the table based on the value resulting
* from a callback function with the parameter being another metadata value
*
* For example for the searchEngine we have a "metadata" information that gives
* the URL of the search engine. We use this URL to add a new "metadata" that gives
* the path of the logo for this search engine URL (which has the format URL.png).
*
* @package Piwik
* @subpackage DataTable
*/
class MetadataCallbackAddMetadata extends Filter
{
private $metadataToRead;
private $functionToApply;
private $metadataToAdd;
private $applyToSummaryRow;
/**
* @param DataTable $table
* @param string|array $metadataToRead
* @param string $metadataToAdd
* @param callback $functionToApply
* @param bool $applyToSummaryRow
*/
public function __construct($table, $metadataToRead, $metadataToAdd, $functionToApply,
$applyToSummaryRow = true)
{
parent::__construct($table);
$this->functionToApply = $functionToApply;
if (!is_array($metadataToRead)) {
$metadataToRead = array($metadataToRead);
}
$this->metadataToRead = $metadataToRead;
$this->metadataToAdd = $metadataToAdd;
$this->applyToSummaryRow = $applyToSummaryRow;
}
/**
* @param DataTable $table
*/
public function filter($table)
{
foreach ($table->getRows() as $key => $row) {
if (!$this->applyToSummaryRow && $key == DataTable::ID_SUMMARY_ROW) {
continue;
}
$params = array();
foreach ($this->metadataToRead as $name) {
$params[] = $row->getMetadata($name);
}
$newValue = call_user_func_array($this->functionToApply, $params);
if ($newValue !== false) {
$row->addMetadata($this->metadataToAdd, $newValue);
}
}
}
}
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