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<?php
/**
* Piwik - free/libre analytics platform
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\DataTable\Filter;
use Piwik\DataTable\BaseFilter;
use Piwik\DataTable\Simple;
use Piwik\DataTable;
use Piwik\Metrics;
use Piwik\Piwik;
use Piwik\Tracker\GoalManager;
/**
* Replaces column names in each row of a table using an array that maps old column
* names new ones.
*
* If no mapping is provided, this column will use one that maps index metric names
* (which are integers) with their string column names. In the database, reports are
* stored with integer metric names because it results in blobs that take up less space.
* When loading the reports, the column names must be replaced, which is handled by this
* class. (See {@link Piwik\Metrics} for more information about integer metric names.)
*
* **Basic example**
*
* // filter use in a plugin's API method
* public function getMyReport($idSite, $period, $date, $segment = false, $expanded = false)
* {
* $dataTable = Archive::getDataTableFromArchive('MyPlugin_MyReport', $idSite, $period, $date, $segment, $expanded);
* $dataTable->queueFilter('ReplaceColumnNames');
* return $dataTable;
* }
*
* @api
*/
class ReplaceColumnNames extends BaseFilter
{
protected $mappingToApply;
/**
* Constructor.
*
* @param DataTable $table The table that will be eventually filtered.
* @param array|null $mappingToApply The name mapping to apply. Must map old column names
* with new ones, eg,
*
* array('OLD_COLUMN_NAME' => 'NEW_COLUMN NAME',
* 'OLD_COLUMN_NAME2' => 'NEW_COLUMN NAME2')
*
* If null, {@link Piwik\Metrics::$mappingFromIdToName} is used.
*/
public function __construct($table, $mappingToApply = null)
{
parent::__construct($table);
$this->mappingToApply = Metrics::$mappingFromIdToName;
if (!is_null($mappingToApply)) {
$this->mappingToApply = $mappingToApply;
}
}
/**
* See {@link ReplaceColumnNames}.
*
* @param DataTable $table
*/
public function filter($table)
{
if ($table instanceof Simple) {
$this->filterSimple($table);
} else {
$this->filterTable($table);
}
}
/**
* @param DataTable $table
*/
protected function filterTable($table)
{
foreach ($table->getRows() as $row) {
$oldColumns = $row->getColumns();
$newColumns = $this->getRenamedColumns($oldColumns);
$row->setColumns($newColumns);
$this->filterSubTable($row);
}
}
/**
* @param Simple $table
*/
protected function filterSimple(Simple $table)
{
foreach ($table->getRows() as $row) {
$columns = array_keys($row->getColumns());
foreach ($columns as $column) {
$newName = $this->getRenamedColumn($column);
if ($newName) {
$row->renameColumn($column, $newName);
}
}
}
}
protected function getRenamedColumn($column)
{
$newName = false;
if (isset($this->mappingToApply[$column])
&& $this->mappingToApply[$column] != $column
) {
$newName = $this->mappingToApply[$column];
}
return $newName;
}
/**
* Checks the given columns and renames them if required
*
* @param array $columns
* @return array
*/
protected function getRenamedColumns($columns)
{
$newColumns = array();
foreach ($columns as $columnName => $columnValue) {
$renamedColumn = $this->getRenamedColumn($columnName);
if ($renamedColumn) {
if ($renamedColumn == 'goals') {
$columnValue = $this->flattenGoalColumns($columnValue);
}
// If we happen to rename a column to a name that already exists,
// sum both values in the column. This should really not happen, but
// we introduced in 1.1 a new dataTable indexing scheme for Actions table, and
// could end up with both strings and their int indexes counterpart in a monthly/yearly dataTable
// built from DataTable with both formats
if (isset($newColumns[$renamedColumn])) {
$columnValue += $newColumns[$renamedColumn];
}
$columnName = $renamedColumn;
}
$newColumns[$columnName] = $columnValue;
}
return $newColumns;
}
/**
* @param $columnValue
* @return array
*/
protected function flattenGoalColumns($columnValue)
{
$newSubColumns = array();
foreach ($columnValue as $idGoal => $goalValues) {
$mapping = Metrics::$mappingFromIdToNameGoal;
if ($idGoal == GoalManager::IDGOAL_CART) {
$idGoal = Piwik::LABEL_ID_GOAL_IS_ECOMMERCE_CART;
} elseif ($idGoal == GoalManager::IDGOAL_ORDER) {
$idGoal = Piwik::LABEL_ID_GOAL_IS_ECOMMERCE_ORDER;
}
foreach ($goalValues as $id => $goalValue) {
$subColumnName = $mapping[$id];
$newSubColumns['idgoal=' . $idGoal][$subColumnName] = $goalValue;
}
}
return $newSubColumns;
}
}
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