File Source for data.graphviz.php

<?php
/**
* @version $Revision$
* @package liberty
* @subpackage plugins_data
*/
// +----------------------------------------------------------------------+
// | Copyright (c) 2004, bitweaver.org
// +----------------------------------------------------------------------+
// | All Rights Reserved. See below for details and a complete list of authors.
// | Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See http://www.gnu.org/copyleft/lesser.html for details
// |
// | For comments, please use phpdocu.sourceforge.net documentation standards!!!
// | -> see http://phpdocu.sourceforge.net/
// +----------------------------------------------------------------------+
// | Author: StarRider starrrider@sourceforge.net
// +----------------------------------------------------------------------+
// $id: data.example.php,v 1.4.2.9 2005/07/14 09:03:36 starrider Exp $
/******************
* Initialization *
******************/
define( 'PLUGIN_GUID_DATAGRAPHVIZ', 'graphviz' );
global $gLibertySystem;
$pluginParams = array ( 'tag' => 'GRAPHVIZ',
'auto_activate' => FALSE,
'requires_pair' => TRUE,
'load_function' => 'data_graphviz',
'title' => 'GraphViz',
'help_page' => 'DataPluginExample',
'description' => tra("This plugin renders it's content as a graphviz image (dot or neato). It requies the Image_GraphViz pear plugin and graphviz to be installed: pear install Image_GraphViz"),
'help_function' => 'data_graphviz_help',
'syntax' => "{GRAPHVIZ}digraph ... {/GRAPHVIZ}",
'plugin_type' => DATA_PLUGIN
);
$gLibertySystem->registerPlugin( PLUGIN_GUID_DATAGRAPHVIZ, $pluginParams );
$gLibertySystem->registerDataTag( $pluginParams['tag'], PLUGIN_GUID_DATAGRAPHVIZ );
/*****************
* Help Function *
*****************/
function data_graphviz_help() {
$help =
'<table class="data help">'
.'<tr>'
.'<th>' . tra( "Key" ) . '</th>'
.'<th>' . tra( "Type" ) . '</th>'
.'<th>' . tra( "Comments" ) . '</th>'
.'</tr>'
.'<tr class="odd">'
.'<td>x1</td>'
.'<td>' . tra( "string") . '<br />' . tra("(optional)") . '</td>'
.'<td>' . tra( "Specifies something / probably to be displayed.")
.'<br />' . tra( "The Default = <strong>Sorry About That</strong>")
.'</td>'
.'</tr>'
.'<tr class="even">'
.'<td>XXX</td>'
.'<td>' . tra( "number") . '<br />' . tra("(optional)") . '</td>'
.'<td>' . tra( "Specifies something / probably to be displayed.")
.'<br />' . tra( "The Default =") . ' <strong>3</strong> ' . tra( "Which means - What")
.'</td>'
.'</tr>'
.'</table>'
. tra("Example: ") . "{EXAM x1=' ' x2=5 }<br />"
. tra("This will display");
return $help;
}
/****************
* Load Function *
****************/
function data_graphviz($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\"/> ";
}
?>

Source for file data.graphviz.php