inverter

#!/usr/bin/env php
<?php

$black = '#000000';
$white = '#FFFFFF';
$fileIn = 'pcb.svg';
$fileSuffix = '_inverted';

if (!empty($argv[1])) {
    $fileIn = $argv[1];
}

if (empty($argv[2])) {
    $fileOut = preg_replace('/\.svg/i', '', $fileIn) . $fileSuffix . '.svg';
} else {
    $fileOut = $argv[2];
}

if (file_exists($fileOut)) {
    unlink($fileOut);
}

$file = file_get_contents($fileIn);
$xml = new SimpleXMLElement($file);

$xml->style[0] = str_replace($black, '{black}', $xml->style[0]);
$xml->style[0] = str_replace($white, $black, $xml->style[0]);
$xml->style[0] = str_replace('{black}', $white, $xml->style[0]);
$xml->g->rect->attributes()['fill'] = $black;

$xml->asXML($fileOut);