/**
* Save some CSV data to a file, and create a quasi-$_FILES entry for it.
* @param string $data
* @return string|array
*/
private function saveDataFile($data)
{
$test_filename = Config::storageDirTmp('test') . '/' . uniqid() . '.csv';
file_put_contents($test_filename, $data);
$uploaded = array('type' => 'text/csv', 'file' => $test_filename);
return $uploaded;
}
public function render()
{
// Generate the DOT source code, and write to a file.
$dot = new \Tabulate\Template('erd/erd.twig');
$dot->tables = $this->tables;
$dot->selectedTables = $this->selectedTables;
$dotCode = $dot->render();
$tmpFilePath = Config::storageDirTmp('erd/' . uniqid());
$dotFile = $tmpFilePath . '/erd.dot';
$pngFile = $tmpFilePath . '/erd.png';
file_put_contents($dotFile, $dotCode);
// Generate the image.
$cmd = Config::dotCommand() . ' -Tpng -o' . escapeshellarg($pngFile) . ' ' . escapeshellarg($dotFile);
$ds = array(0 => array('pipe', 'r'), 1 => array('pipe', 'w'), 2 => array('pipe', 'w'));
$pipes = false;
$proc = proc_open($cmd, $ds, $pipes, Config::storageDirTmp('erd'), array());
fclose($pipes[0]);
$out = stream_get_contents($pipes[1]);
fclose($pipes[1]);
$err = stream_get_contents($pipes[2]);
fclose($pipes[2]);
proc_close($proc);
if (!empty($err)) {
throw new \Exception("Error generating graph image. {$err}");
}
// Send the image.
header('Content-Type:image/png');
echo file_get_contents($pngFile);
// Clean up.
\Tabulate\File::rmdir($tmpFilePath);
}
