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TiddlyWiki5/plugins/tiddlywiki/googleanalytics/googleanalytics.js
2023-07-14 12:41:55 +01:00

62 lines
1.9 KiB
JavaScript

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