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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
* @version $Id$
*
* @category Piwik
* @package Piwik
*/
/**
* JSON export. Using the php 5.2 feature json_encode.
* Works with recursive DataTable (when a row can be associated with a subDataTable).
*
* @package Piwik
* @subpackage Piwik_DataTable
*/
class Piwik_DataTable_Renderer_Json extends Piwik_DataTable_Renderer
{
public function render()
{
Piwik_DataTable_Renderer_Json::renderHeader();
return $this->renderTable($this->table);
}
function renderException()
{
Piwik_DataTable_Renderer_Json::renderHeader();
$exceptionMessage = self::renderHtmlEntities($this->exception->getMessage());
$exceptionMessage = str_replace("\n", "", $exceptionMessage);
$exceptionMessage = '{"result":"error", "message":"'.$exceptionMessage.'"}';
return $this->jsonpWrap($exceptionMessage);
}
protected function renderTable($table)
{
$renderer = new Piwik_DataTable_Renderer_Php();
$renderer->setTable($table);
$renderer->setRenderSubTables($this->isRenderSubtables());
$renderer->setSerialize(false);
$array = $renderer->flatRender();
if(!is_array($array))
{
$array = array('value' => $array);
}
$str = json_encode($array);
return $this->jsonpWrap($str);
}
protected function jsonpWrap($str)
{
if(($jsonCallback = Piwik_Common::getRequestVar('jsoncallback', false)) !== false)
{
if(preg_match('/^[0-9a-zA-Z]*$/', $jsonCallback) > 0)
{
$str = $jsonCallback . "(" . $str . ")";
}
}
return $str;
}
static private function renderHeader ()
{
@header( "Content-Type: application/json" );
}
}
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