1<?php 2 3class action_plugin_googletagmanager extends DokuWiki_Action_Plugin 4{ 5 public const GTMID = 'GTMID'; 6 7 /** 8 * return some info 9 */ 10 function getInfo(){ 11 return array( 12 'author' => 'Alexander Lehmann', 13 'email' => 'alexlehm@gmail.com', 14 'date' => '2026-01-03', 15 'name' => 'Google Tag Manager Plugin', 16 'desc' => 'Plugin to embed Google Tag Manager in your wiki.', 17 'url' => 'https://wiki.lehmann.cx/projects:dokuwiki_gtm', 18 ); 19 } 20 21 /** 22 * Register its handlers with the DokuWiki's event controller 23 */ 24 public function register(Doku_Event_Handler $controller) 25 { 26 $controller->register_hook('TPL_METAHEADER_OUTPUT', 'BEFORE', $this, 'addHeaders'); 27 } 28 29 public function addHeaders(&$event, $param) 30 { 31 $GTMID = $this->getConf(self::GTMID); 32 if (!$GTMID) return; 33 34 $is_AW_tag = substr($GTMID, 0, 3) == 'AW-'; 35 36 if ($is_AW_tag) { 37 $event->data['script'][] = array ( 38 'src' => "https://www.googletagmanager.com/gtag/js?id=" . $GTMID, 39 ); 40 $event->data['script'][] = array ( 41 'type' => 'text/javascript', 42 '_data' => "window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);}" . 43 " gtag('js', new Date()); gtag('config', '" . 44 $GTMID . 45 "');", 46 ); 47 } else { 48 $event->data['noscript'][] = array ( 49 '_data' => '<iframe src="https://www.googletagmanager.com/ns.html?id=' . 50 $GTMID . 51 '" height="0" width="0" style="display:none;visibility:hidden"></iframe>', 52 ); 53 $event->data['script'][] = array ( 54 'type' => 'text/javascript', 55 '_data' => "(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': 56new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], 57j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 58'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); 59})(window,document,'script','dataLayer','" . 60 $GTMID . 61 "');", 62 ); 63 } 64 } 65} 66