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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;
use Piwik\DataTable\Row;
use Piwik\Piwik;
/**
* Replace a column value with a new value resulting
* from the function called with the column's value
*
* @package Piwik
* @subpackage DataTable
*/
class ColumnCallbackReplace extends Filter
{
private $columnsToFilter;
private $functionToApply;
private $functionParameters;
private $extraColumnParameters;
/**
* @param DataTable $table
* @param array|string $columnsToFilter
* @param callback $functionToApply
* @param array|null $functionParameters
* @param array $extraColumnParameters
*/
public function __construct($table, $columnsToFilter, $functionToApply, $functionParameters = null,
$extraColumnParameters = array())
{
parent::__construct($table);
$this->functionToApply = $functionToApply;
$this->functionParameters = $functionParameters;
if (!is_array($columnsToFilter)) {
$columnsToFilter = array($columnsToFilter);
}
$this->columnsToFilter = $columnsToFilter;
$this->extraColumnParameters = $extraColumnParameters;
}
/**
* Filters the given data table
*
* @param DataTable $table
*/
public function filter($table)
{
foreach ($table->getRows() as $key => $row) {
$extraColumnParameters = array();
foreach ($this->extraColumnParameters as $columnName) {
$extraColumnParameters[] = $row->getColumn($columnName);
}
foreach ($this->columnsToFilter as $column) {
// when a value is not defined, we set it to zero by default (rather than displaying '-')
$value = $this->getElementToReplace($row, $column);
if ($value === false) {
$value = 0;
}
$parameters = array_merge(array($value), $extraColumnParameters);
if (!is_null($this->functionParameters)) {
$parameters = array_merge($parameters, $this->functionParameters);
}
$newValue = call_user_func_array($this->functionToApply, $parameters);
$this->setElementToReplace($row, $column, $newValue);
$this->filterSubTable($row);
}
}
}
/**
* Replaces the given column within given row with the given value
*
* @param Row $row
* @param string $columnToFilter
* @param mixed $newValue
*/
protected function setElementToReplace($row, $columnToFilter, $newValue)
{
$row->setColumn($columnToFilter, $newValue);
}
/**
* Returns the element that should be replaced
*
* @param Row $row
* @param string $columnToFilter
* @return mixed
*/
protected function getElementToReplace($row, $columnToFilter)
{
return $row->getColumn($columnToFilter);
}
}
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