function data_graphviz($data, $params)
{
$data = trim($data);
$data = html_entity_decode($data);
$storageurl = STORAGE_PKG_URL . 'GraphViz/';
$storagepath = STORAGE_PKG_PATH . 'GraphViz/';
$temppath = TEMP_PKG_PATH . 'GraphViz/';
if (!is_dir($temppath)) {
mkdir_p($temppath);
}
if (!is_dir($storagepath)) {
mkdir_p($storagepath);
}
$file = md5($data);
$dotFile = $temppath . $file . '.dot';
$pngFile = $storagepath . $file . '.png';
$pngURL = $storageurl . $file . '.png';
if (!file_exists($pngFile)) {
if (@(include_once 'PEAR.php')) {
if (@(include_once 'Image/GraphViz.php')) {
$graph = new Image_GraphViz();
$error = '<div class=error>' . tra("Unable to write temporary file. Please check your server configuration.") . '</div>';
if (!($fp = fopen($dotFile, 'w'))) {
return $error;
}
if (fwrite($fp, $data) === false) {
return $error;
}
fclose($fp);
$graph->renderDotFile($dotFile, $pngFile, 'png');
// No need to keep this lying around
unlink($dotFile);
// If it still isn't there....
if (!file_exists($pngFile)) {
return '<div class=error>' . tra("Unable to generate graphviz image file. Please check your data.") . '</div>';
}
} else {
return "<div class=error>" . tra("The Image_Graphviz pear plugin is not installed. Install with `pear install Image_Graphviz`.") . "</div>";
}
} else {
return "<div class=error>" . tra("PEAR and the Image_Graphviz pear plugin are not installed.") . "</div>";
}
}
return "<img src=\"{$pngURL}\"/> ";
}
