File Source for data.wikigraph.php

<?php
/**
* @version $Revision: 1.6 $
* @package liberty
* @subpackage plugins_data
*/
/**
* definitions
*/
global $gBitSystem, $gLibertySystem;
// only include this plugin if wiki is active and we have GraphViz
if( @include_once( 'Image/GraphViz.php' )) {
define( 'PLUGIN_GUID_DATAWIKIGRAPH', 'datawikigraph' );
$pluginParams = array (
'tag' => 'wikigraph',
'auto_activate' => FALSE,
'requires_pair' => TRUE,
'load_function' => 'data_wikigraph',
'title' => 'WikiGraph',
'help_page' => 'DataPluginWikiGraph',
'description' => tra( "Inserts a graph for visual navigation. The graph shows the page and every page that can be reached from that page. It requies the Image_GraphViz pear plugin and graphviz to be installed: <strong>pear install Image_GraphViz</strong>" ),
'help_function' => 'data_wikigraph_help',
'syntax' => "{wikigraph level= title= }".tra( "Wiki page name" )."{/wikigraph}",
'plugin_type' => DATA_PLUGIN
);
$gLibertySystem->registerPlugin( PLUGIN_GUID_DATAWIKIGRAPH, $pluginParams );
$gLibertySystem->registerDataTag( $pluginParams['tag'], PLUGIN_GUID_DATAWIKIGRAPH );
function data_wikigraph_help() {
$help =
'<table class="data help">'
.'<tr>'
.'<th>'.tra( "Key" ).'</th>'
.'<th>'.tra( "Type" ).'</th>'
.'<th>'.tra( "Comments" ).'</th>'
.'</tr>'
.'<tr class="odd">'
.'<td>level</td>'
.'<td>'.tra( "numeric").'<br />'.tra( "(optional)" ).'</td>'
.'<td>'.tra( "The number of levels that will be followed from the starting page." ).' '.tra( "Default").': 0</td>'
.'</tr>'
.'<tr class="even">'
.'<td>title</td>'
.'<td>'.tra( "string").'<br />'.tra( "(optional)" ).'</td>'
.'<td>'.tra( "Title of the graph.").' '.tra( "Default ").': Wiki-Graph</td>'
.'</tr>'
.'<tr class="odd">'
.'<td>nodesep</td>'
.'<td>'.tra( "numeric").'<br />'.tra( "(optional)" ).'</td>'
.'<td>'.tra( "Distance between nodes in inches.").' '.tra( "Default").': 1.2</td>'
.'</tr>'
.'<tr class="even">'
.'<td>rankdir</td>'
.'<td>'.tra( "string").'<br />'.tra( "(optional)" ).'</td>'
.'<td>'.tra( "Direction of graph layout - can be Left to Right (LR), Right to Left (RL), Top to Bottom (TB), Bottom to Top (BT).").' '.tra( "Default").': TB</td>'
.'</tr>'
.'<tr class="odd">'
.'<td>bgcolor</td>'
.'<td>'.tra( "html colour").'<br />'.tra( "(optional)" ).'</td>'
.'<td>'.tra( "Background colour of the graph.").' '.tra( "Default").': transparent</td>'
.'</tr>'
.'</table>'
.tra( "Example: " )."{wikigraph level=1}Welcome{/wikigraph}";
return $help;
}
function data_wikigraph( $pData, $pParams ) {
global $gContent, $gBitThemes;
$ret = " ";
// check to see if we have pear available.
if( $error = pear_check( "Image/GraphViz.php" )) {
return $error;
}
if( !empty( $gContent ) && is_object( $gContent )) {
$querystring = "";
$title = ( !empty( $pParams['title'] ) ? $pParams['title'] : 'Wiki-Graph' );
unset( $pParams['title'] );
foreach( $pParams as $param => $value ) {
$querystring .= "&{$param}={$value}";
}
if( empty( $pData ) ) {
$pData = (( is_object( $gContent ) || !empty( $gContent->mPageName )) ? $gContent->mPageName : NULL );
}
if( !empty( $pData ) ) {
$params = array(
'graph' => $gBitThemes->getGraphvizGraphAttributes( $pParams ),
'node' => $gBitThemes->getGraphvizNodeAttributes( $pParams ),
'edge' => $gBitThemes->getGraphvizEdgeAttributes( $pParams ),
);
$mapname = md5( microtime() );
$mapdata = $gContent->linkStructureMap( $pData, ( isset( $pParams['level'] ) ? $pParams['level'] : 0 ), $params );
$ret = "
<div style='text-align:center'>
<img src=\"".WIKI_PKG_URL."wiki_graph.php?page=".urlencode( $pData )."{$querystring}\" alt='{$title}' usemap='#$mapname' />
<map name='$mapname'>$mapdata</map>
</div>";
$ret = preg_replace( "/\n|\r/", '', $ret );
}
}
return $ret;
}
} // graphviz check
?>

Source for file data.wikigraph.php