Adding ga code.

src/TrackingProviders/GoogleAnalyticsTrackingProvider.php

@@ -4,5 +4,95 @@
 
 class GoogleAnalyticsTrackingProvider
 {
+    public static function getHeadTopTrackingCode()
+    {
 
+    }
+
+    public static function getHeadBottomTrackingCode()
+    {
+
+    }
+
+    public static function getBodyTopTrackingCode()
+    {
+
+    }
+
+    public static function getBodyBottomTrackingCode()
+    {
+        $trackingId = config('railanalytics.providers.google-analytics.tracking-id');
+
+        echo
+        "
+            <script>
+                (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+                (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+                m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+                })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
+            
+                ga('create', '" . $trackingId . "', 'auto');
+                ga('send', 'pageview');
+            </script>
+        ";
+    }
+
+    public static function trackBase($trackGroupName)
+    {
+
+    }
+
+    public static function trackProductImpression(
+        $trackGroupName,
+        $id,
+        $name,
+        $category,
+        $value,
+        $currency = null
+    ) {
+
+    }
+
+    public static function trackProductDetailsImpression(
+        $trackGroupName,
+        $id,
+        $name,
+        $category,
+        $value,
+        $currency = null
+    ) {
+
+    }
+
+    public static function trackAddToCart(
+        $trackGroupName,
+        $id,
+        $name,
+        $category,
+        $value,
+        $quantity,
+        $currency = null
+    ) {
+
+    }
+
+    public static function trackInitiateCheckout()
+    {
+
+    }
+
+    public static function trackAddPaymentInformation()
+    {
+
+    }
+
+    public static function trackTransaction()
+    {
+
+    }
+
+    public static function trackRegistration()
+    {
+
+    }
 }