finished metrics

frontend/src/utils.js

@@ -69,9 +69,35 @@ function gcmCompliant() {
   }
 }
 
+function findMetric(href) {
+  switch(href) {
+    case 'https://www.mozilla.org/':
+      return 'mozilla';
+    case 'https://www.mozilla.org/about/legal':
+      return 'legal';
+    case 'https://testpilot.firefox.com/about':
+      return 'about';
+    case 'https://testpilot.firefox.com/privacy':
+      return 'privacy';
+    case 'https://testpilot.firefox.com/terms':
+      return 'terms';
+    case 'https://www.mozilla.org/en-US/privacy/websites/#cookies':
+      return 'cookies';
+    case 'https://github.com/mozilla/send':
+      return 'github';
+    case 'https://twitter.com/FxTestPilot':
+      return 'twitter';
+    case 'https://www.mozilla.org/firefox/new/?scene=2':
+      return 'download-firefox';
+    default:
+      return 'other';
+  }
+}
+
 module.exports = {
   arrayToHex,
   hexToArray,
   notify,
-  gcmCompliant
+  gcmCompliant,
+  findMetric
 };