fallbacks-graph.php

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<?php
// Standard boilerplate to define $IP
if ( getenv( 'MW_INSTALL_PATH' ) !== false ) {
    $IP = getenv( 'MW_INSTALL_PATH' );
} else {
    $dir = __DIR__;
    $IP = "$dir/../../..";
}
require_once "$IP/maintenance/Maintenance.php";

class FallbacksCompare extends Maintenance {
    public function __construct() {
        parent::__construct();
        $this->mDescription = 'Creates graphml xml file of language fallbacks.';
    }

    public function execute() {
        $template = <<<XML
<?xml version="1.0" encoding="UTF-8"?>
<graphml
    xmlns="http://graphml.graphdrawing.org/xmlns"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns
        http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd"
    xmlns:y="http://www.yworks.com/xml/graphml">

    <key id="code" for="node" yfiles.type="nodegraphics"/>
    <graph id="G" edgedefault="directed">
$1
    </graph>
</graphml>

XML;

        $langs = Language::fetchLanguageNames( null, 'mw' );
        $nodes = $edges = array();
        foreach ( $langs as $code => $name ) {

            $fallbacks = Language::getFallbacksFor( $code );
            if ( $fallbacks === array( 'en' ) ) {
                continue;
            }

            $nodes[$code] = $this->createNode( $code );

            $prev = $code;
            foreach ( $fallbacks as $fb ) {
                $nodes[$fb] = $this->createNode( $fb );
                $edges[$fb . $prev] = Xml::element( 'edge', array( 'source' => $prev, 'target' => $fb ) );
                $prev = $fb;
            }
        }

        $output = array_merge( $nodes, $edges );
        $output = "\t\t" . implode( "\n\t\t", $output );
        echo str_replace( '$1', $output, $template );
    }

    protected function createNode( $code ) {
        return
            Xml::openElement( 'node', array( 'id' => $code ) )
            . Xml::openElement( 'data', array( 'key' => "code" ) )
            . Xml::openElement( 'y:Shpapenode' )
            . Xml::element( 'y:NodeLabel', array(), $code )
            . Xml::closeElement( 'y:Shpapenode' )
            . Xml::closeElement( 'data' )
            . Xml::closeElement( 'node' );
    }
}

$maintClass = 'FallbacksCompare';
require_once DO_MAINTENANCE;