62 lines
1.9 KiB
JavaScript
62 lines
1.9 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/googleanalytics/googleanalytics.js
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type: application/javascript
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module-type: startup
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Runs Google Analytics with the measurement ID in the tiddler `$:/GoogleAnalyticsMeasurementID`
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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// Export name and synchronous status
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exports.name = "google-analytics";
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exports.platforms = ["browser"];
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exports.synchronous = true;
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var CONFIG_CONSENT_REQUIRED_TITLE = "$:/config/cookie-consent-required", // "yes" or "no" (the default)
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CONSENT_TITLE = "$:/state/consent-banner/accepted"; // "": undeclared, "yes": accepted, "no": declined
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exports.startup = function() {
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var hasInitialised = false,
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initialiseGoogleAnalytics = function() {
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console.log("Initialising Google Analytics");
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hasInitialised = true;
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var gaMeasurementID = $tw.wiki.getTiddlerText("$:/GoogleAnalyticsMeasurementID","").replace(/\n/g,"");
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var url ="https://www.googletagmanager.com/gtag/js?id=" + gaMeasurementID;
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window.dataLayer = window.dataLayer || [];
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window.gtag = function() { window.dataLayer?.push(arguments); };
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window.gtag("js",new Date());
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window.gtag("config",gaMeasurementID);
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const scriptElement = window.document.createElement("script");
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scriptElement.async = true;
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scriptElement.src = url;
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window.document.head.appendChild(scriptElement);
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};
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// Initialise now if consent isn't required
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if($tw.wiki.getTiddlerText(CONFIG_CONSENT_REQUIRED_TITLE) !== "yes") {
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initialiseGoogleAnalytics();
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} else {
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// Or has been granted already
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if($tw.wiki.getTiddlerText(CONSENT_TITLE) === "yes") {
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initialiseGoogleAnalytics();
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} else {
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// Or when our config tiddler changes
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$tw.wiki.addEventListener("change",function(changes) {
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if(changes[CONSENT_TITLE]) {
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if(!hasInitialised && $tw.wiki.getTiddlerText(CONSENT_TITLE) === "yes") {
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initialiseGoogleAnalytics();
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}
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}
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});
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}
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}
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};
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})();
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