1<?php 2/** 3 * DokuWiki Plugin diagrams (Helper Component) 4 * 5 * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html 6 * @author Innovakom + CosmoCode <dokuwiki@cosmocode.de> 7 */ 8class helper_plugin_diagrams extends \dokuwiki\Extension\Plugin 9{ 10 /** 11 * Check if the given SVG is a diagrams.net diagram 12 * 13 * This is done by ensuring that the service host is part of the SVG header 14 * 15 * @param string $svg The raw SVG data (first 500 bytes are enough) 16 * @return bool 17 */ 18 public function isDiagram($svg) { 19 $svg = substr($svg, 0, 500); // makes checking a tiny bit faster 20 $confServiceUrl = $this->getConf('service_url'); // like "https://diagrams.xyz.org/?embed=1&..." 21 $serviceHost = parse_url($confServiceUrl, PHP_URL_HOST); // Host-Portion of the Url, e.g. "diagrams.xyz.org" 22 return strpos($svg, 'embed.diagrams.net') || strpos($svg, 'draw.io') || strpos($svg, $serviceHost); 23 } 24} 25 26