1 files changed, 46 insertions, 0 deletions
diff --git a/site/js/google-analytics-message.js b/site/js/google-analytics-message.js
new file mode 100644
index 0000000..d5ecb91
--- /dev/null
+++ b/site/js/google-analytics-message.js
@@ -0,0 +1,46 @@
+// function to toggle Google Analytics message
+const toggleGoogleAnalyticsMessage = action => {
+  const message = document.getElementById('google-analytics-message')
+  action === 'show' && message.classList.add('open')
+  action === 'hide' && message.classList.remove('open')
+}
+
+// check if cookies with user choice exist
+const isGoogleAnalyticsAllowedValueExist =
+  document.cookie.split(';')
+    .find(row => row.includes('isGoogleAnalyticsAllowed'))
+
+// if the user has already made a choice
+if (isGoogleAnalyticsAllowedValueExist) {
+
+  const isGoogleAnalyticsAllowedValue = isGoogleAnalyticsAllowedValueExist.split('=')[1]
+
+  // and if the user chose "Accept" - connect Google Analytics
+  if (isGoogleAnalyticsAllowedValue === 'yes') {
+    window.dataLayer = window.dataLayer || [];
+    function gtag() { dataLayer.push(arguments); }
+    gtag('js', new Date());
+    gtag('config', 'G-J3WHFQG00P');
+  }
+
+} else {
+
+  // display a message with a question
+  toggleGoogleAnalyticsMessage('show')
+
+  const googleAnalyticsMessageAccept = document.getElementById('google-analytics-message-accept')
+  const googleAnalyticsMessageDecline = document.getElementById('google-analytics-message-decline')
+
+  // register a click on the "Accept" button
+  googleAnalyticsMessageAccept.addEventListener('click', function () {
+    document.cookie = 'isGoogleAnalyticsAllowed=yes'
+    toggleGoogleAnalyticsMessage('hide')
+  })
+
+  // register a click on the "Decline" button
+  googleAnalyticsMessageDecline.addEventListener('click', function () {
+    document.cookie = 'isGoogleAnalyticsAllowed=no'
+    toggleGoogleAnalyticsMessage('hide')
+  })
+
+}
+\ No newline at end of file