Wikimantis

Really old Graphviz extension, because it works. And also because I need this accessible to a blogpost I am writing

<?php

# CoffMan (http://www.wickle.com) code adapted from timeline extension.
# Timeline extension
# To use, include this file from your LocalSettings.php
# To configure, set members of $wgGraphVizSettings after the inclusion

class GraphVizSettings {
var $dotCommand;
};
$wgGraphVizSettings = new GraphVizSettings;
$wgGraphVizSettings->dotCommand = "/usr/local/bin/dot";

$wgExtensionFunctions[] = "wfGraphVizExtension";

function wfGraphVizExtension() {
global $wgParser;
$wgParser->setHook( "graphviz", "renderGraphviz" );
}

function renderGraphviz( $timelinesrc )
{
global $wgUploadDirectory, $wgUploadPath, $IP, $wgGraphVizSettings, $wgArticlePath, $wgTmpDirectory;
$hash = md5( $timelinesrc );
$dest = $wgUploadDirectory."/graphviz/";
if ( ! is_dir( $dest ) ) { mkdir( $dest, 0777 ); }
if ( ! is_dir( $wgTmpDirectory ) ) { mkdir( $wgTmpDirectory, 0777 ); }

$fname = $dest . $hash;
//echo $fname;
if ( ! ( file_exists( $fname.".png" ) || file_exists( $fname.".err" ) ) )
{
$handle = fopen($fname, "w");
fwrite($handle, $timelinesrc);
fclose($handle);

$cmdline = wfEscapeShellArg( $wgGraphVizSettings->dotCommand) . 
  " -Tpng -o " . wfEscapeShellArg( $fname. ".png") . " " .
  wfEscapeShellArg( $fname ) ;
$cmdlinemap = wfEscapeShellArg( $wgGraphVizSettings->dotCommand) . 
  " -Tcmapx -o " . wfEscapeShellArg( $fname. ".map") . " " .
  wfEscapeShellArg( $fname ) ;
//echo $cmdline;
//exit;
//break;
//echo "ADIOS";
$ret = `{$cmdline}`;
$ret = `{$cmdlinemap}`;

unlink($fname);

/*
if ( $ret == "" ) {
// Message not localized, only relevant during install
return "<div id=\"toc\"><tt>Timeline error: Executable not found. Command line was: {$cmdline}</tt></div>";
}
*/
}

@$err=file_get_contents( $fname.".err" ); 

if ( $err != "" ) {
$txt = "<div id=\"toc\"><tt>$err</tt></div>";
} else {
//echo $fname.".map";
@$map = file_get_contents( $fname.".map" );
//echo "mapa-antes:".$map;
$map=preg_replace("#<ma(.*)>#"," ",$map);
$map=str_replace("</map>","",$map);

//echo "mapa:".$map;
if (substr(php_uname(), 0, 7) == "Windows") {
$ext = "gif";
} else {
$ext = "png";
}

$txt  = "<map name=\"$hash\">{$map}</map>".
        "<img usemap=\"#{$hash}\" src=\"{$wgUploadPath}/graphviz/{$hash}.{$ext}\">";
}
return $txt;
}

?>