init scripts

Author: Nikolaos Veneti

lib/init-script/init.js

@@ -0,0 +1,81 @@
+(function() {
+    // Create a dummy analytics object until real loaded
+    window.analytics || (window.analytics = []);
+    window.analytics.methods = [
+        'identify',
+        'track',
+        'trackLink',
+        'trackForm',
+        'trackClick',
+        'trackSubmit',
+        'page',
+        'pageview',
+        'ab',
+        'alias',
+        'ready',
+        'group',
+        'on',
+        'once',
+        'off'
+    ];
+    window.analytics.factory = function(method) {
+        return function() {
+            var args = Array.prototype.slice.call(arguments);
+            args.unshift(method);
+            window.analytics.push(args);
+            return window.analytics;
+        };
+    };
+    for (var i = 0; i < window.analytics.methods.length; i++) {
+        var method = window.analytics.methods[i];
+        window.analytics[method] = window.analytics.factory(method);
+    }
+
+    // Load analytics async
+    analytics.load = function(callback) {
+        if (document.getElementById('dreamdata-analytics')) return;
+
+        // We make a copy if our dummy object
+        window.a = window.analytics;
+        var script = document.createElement('script');
+        script.async = true;
+        script.id = 'dreamdata-analytics';
+        script.type = 'text/javascript';
+        script.src =
+            ('https:' === document.location.protocol ? 'https://' : 'http://') +
+            'cdn.dreamdata.cloud/scripts/analytics/v1/dreamdata.min.js';
+        if (script.addEventListener) {
+            script.addEventListener(
+                'load',
+                function(e) {
+                    if (typeof callback === 'function') {
+                        callback(e);
+                    }
+                },
+                false
+            );
+        } else {
+            //IE8
+            script.onreadystatechange = function() {
+                if (this.readyState == 'complete' || this.readyState == 'loaded') {
+                    callback(window.event);
+                }
+            };
+        }
+        var first = document.getElementsByTagName('script')[0];
+        first.parentNode.insertBefore(script, first);
+    };
+
+    analytics.load(function() {
+        // On load init our integrations
+        analytics.initialize({ 'Dreamdata.io': { apiKey: '<API_KEY>' } });
+        // Now copy whatever we applied to our dummy object to the real analytics
+        while (window.a.length > 0) {
+            var item = window.a.shift();
+            var method = item.shift();
+            if (analytics[method]) analytics[method].apply(analytics, item);
+        }
+    });
+
+    analytics.page();
+})();