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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\DataTable\Renderer;
use Piwik\Common;
use Piwik\DataTable\Renderer;
use Piwik\DataTable;
/**
* JSON export.
* Works with recursive DataTable (when a row can be associated with a subDataTable).
*
*/
class Json extends Renderer
{
/**
* Computes the dataTable output and returns the string/binary
*
* @return string
*/
public function render()
{
return $this->renderTable($this->table);
}
/**
* Computes the output for the given data table
*
* @param DataTable $table
* @return string
*/
protected function renderTable($table)
{
if (is_array($table)) {
$array = $table;
if (self::shouldWrapArrayBeforeRendering($array, $wrapSingleValues = true)) {
$array = array($array);
}
foreach ($array as $key => $tab) {
if ($tab instanceof DataTable\Map
|| $tab instanceof DataTable
|| $tab instanceof DataTable\Simple) {
$array[$key] = $this->convertDataTableToArray($tab);
if (!is_array($array[$key])) {
$array[$key] = array('value' => $array[$key]);
}
}
}
} else {
$array = $this->convertDataTableToArray($table);
}
if (!is_array($array)) {
$array = array('value' => $array);
}
// convert datatable column/metadata values
$this->convertDataTableColumnMetadataValues($array);
// decode all entities
$callback = function (&$value, $key) {
if (is_string($value)) {
$value = html_entity_decode($value, ENT_QUOTES, "UTF-8");
};
};
array_walk_recursive($array, $callback);
// silence "Warning: json_encode(): Invalid UTF-8 sequence in argument"
$str = @json_encode($array);
if ($str === false
&& json_last_error() === JSON_ERROR_UTF8
&& $this->canMakeArrayUtf8()) {
$array = $this->makeArrayUtf8($array);
$str = json_encode($array);
}
return $str;
}
private function canMakeArrayUtf8()
{
return function_exists('mb_convert_encoding');
}
private function makeArrayUtf8($array)
{
if (is_array($array)) {
foreach ($array as $key => $value) {
$array[$key] = self::makeArrayUtf8($value);
}
} elseif (is_string($array)) {
return mb_convert_encoding($array, 'UTF-8', 'auto');
}
return $array;
}
public static function sendHeaderJSON()
{
Common::sendHeader('Content-Type: application/json; charset=utf-8');
}
private function convertDataTableColumnMetadataValues(&$table)
{
if (empty($table)) {
return;
}
array_walk_recursive($table, function (&$value, $key) {
if ($value instanceof DataTable) {
$value = $this->convertDataTableToArray($value);
$this->convertDataTableColumnMetadataValues($value);
}
});
}
}
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