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<?php
/**
* Piwik - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\Plugins\CoreVisualizations\Visualizations;
use Exception;
use Piwik\Common;
use Piwik\DataTable;
use Piwik\Plugin\ViewDataTable;
/**
* Reads the requested DataTable from the API and prepare data for the Sparkline view.
*
*/
class Sparkline extends ViewDataTable
{
const ID = 'sparkline';
/**
* @see ViewDataTable::main()
* @return mixed
*/
public function render()
{
// If period=range, we force the sparkline to draw daily data points
$period = Common::getRequestVar('period');
if ($period == 'range') {
$_GET['period'] = 'day';
}
$this->loadDataTableFromAPI();
// then revert the hack for potentially subsequent getRequestVar
$_GET['period'] = $period;
$values = $this->getValuesFromDataTable($this->dataTable);
if (empty($values)) {
$values = array_fill(0, 30, 0);
}
$graph = new \Piwik\Visualization\Sparkline();
$graph->setValues($values);
$height = Common::getRequestVar('height', 0, 'int');
if (!empty($height)) {
$graph->setHeight($height);
}
$width = Common::getRequestVar('width', 0, 'int');
if (!empty($width)) {
$graph->setWidth($width);
}
$graph->main();
return $graph->render();
}
/**
* @param DataTable\Map $dataTableMap
* @param string $columnToPlot
*
* @return array
* @throws \Exception
*/
protected function getValuesFromDataTableMap($dataTableMap, $columnToPlot)
{
$dataTableMap->applyQueuedFilters();
$values = array();
foreach ($dataTableMap->getDataTables() as $table) {
if ($table->getRowsCount() > 1) {
throw new Exception("Expecting only one row per DataTable");
}
$value = 0;
$onlyRow = $table->getFirstRow();
if (false !== $onlyRow) {
if (!empty($columnToPlot)) {
$value = $onlyRow->getColumn($columnToPlot);
} // if not specified, we load by default the first column found
// eg. case of getLastDistinctCountriesGraph
else {
$columns = $onlyRow->getColumns();
$value = current($columns);
}
}
$values[] = $value;
}
return $values;
}
protected function getValuesFromDataTable($dataTable)
{
$columns = $this->config->columns_to_display;
$columnToPlot = false;
if (!empty($columns)) {
$columnToPlot = reset($columns);
if ($columnToPlot == 'label') {
$columnToPlot = next($columns);
}
}
// a Set is returned when using the normal code path to request data from Archives, in all core plugins
// however plugins can also return simple datatable, hence why the sparkline can accept both data types
if ($this->dataTable instanceof DataTable\Map) {
$values = $this->getValuesFromDataTableMap($dataTable, $columnToPlot);
} elseif ($this->dataTable instanceof DataTable) {
$values = $this->dataTable->getColumn($columnToPlot);
} else {
$values = false;
}
return $values;
}
}
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