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<?php
declare(strict_types=1);
namespace SimpleSAML\Module\core\Stats\Output;
use SimpleSAML\Configuration;
use SimpleSAML\Error;
/**
* Statistics logger that writes to a set of log files
*
* @package SimpleSAMLphp
*/
class File extends \SimpleSAML\Stats\Output
{
/**
* The log directory.
* @var string
*/
private $logDir;
/**
* The file handle for the current file.
* @var resource|null
*/
private $file = null;
/**
* The current file date.
* @var string|null
*/
private $fileDate = null;
/**
* Initialize the output.
*
* @param \SimpleSAML\Configuration $config The configuration for this output.
*/
public function __construct(Configuration $config)
{
$logDir = $config->getPathValue('directory');
if ($logDir === null) {
throw new \Exception('Missing "directory" option for core:File');
}
if (!is_dir($logDir)) {
throw new \Exception('Could not find log directory: ' . var_export($logDir, true));
}
$this->logDir = $logDir;
}
/**
* Open a log file.
*
* @param string $date The date for the log file.
* @return void
*/
private function openLog(string $date): void
{
if ($this->file !== null && $this->file !== false) {
fclose($this->file);
$this->file = null;
}
$fileName = $this->logDir . '/' . $date . '.log';
$fh = @fopen($fileName, 'a');
if ($fh === false) {
throw new Error\Exception('Error opening log file: ' . var_export($fileName, true));
}
// Disable output buffering
stream_set_write_buffer($fh, 0);
$this->file = $fh;
$this->fileDate = $date;
}
/**
* Write a stats event.
*
* @param array $data The event.
* @return void
*/
public function emit(array $data)
{
assert(isset($data['time']));
$time = $data['time'];
$milliseconds = intval((($time - intval($time)) * 1000));
$timestamp = gmdate('Y-m-d\TH:i:s', intval($time)) . sprintf('.%03dZ', $milliseconds);
$outDate = substr($timestamp, 0, 10); // The date-part of the timstamp
if ($outDate !== $this->fileDate) {
$this->openLog($outDate);
}
$line = $timestamp . ' ' . json_encode($data) . "\n";
/** @psalm-suppress PossiblyNullArgument */
fwrite($this->file, $line);
}
}
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