Current and Longest streak calculation fixed

Minor refactoring and unit tests added

After CR: user-stats file moved to util folder, export keywork added to exported functions, new line added at the end of gulp file

User-stats-test file moved to replicate user-stats path in test folder

server/boot/user.js

@@ -10,9 +10,9 @@ import {
 } from '../utils/constantStrings.json';
 import { ifNoUser401, ifNoUserRedirectTo } from '../utils/middleware';
 import { observeQuery } from '../utils/rx';
+import { calcCurrentStreak, calcLongestStreak } from '../utils/user-stats';
 
 const debug = debugFactory('freecc:boot:user');
-const daysBetween = 1.5;
 const sendNonUserToMap = ifNoUserRedirectTo('/map');
 
 function replaceScriptTags(value) {
@@ -31,47 +31,6 @@ function encodeFcc(value = '') {
   return replaceScriptTags(replaceFormAction(value));
 }
 
-function calcCurrentStreak(cals) {
-  const revCals = cals.concat([Date.now()]).slice().reverse();
-  let streakBroken = false;
-  const lastDayInStreak = revCals
-    .reduce((current, cal, index) => {
-      const before = revCals[index === 0 ? 0 : index - 1];
-      if (
-        !streakBroken &&
-        moment(before).diff(cal, 'days', true) < daysBetween
-      ) {
-        return index;
-      }
-      streakBroken = true;
-      return current;
-    }, 0);
-
-  const lastTimestamp = revCals[lastDayInStreak];
-  return Math.ceil(moment().diff(lastTimestamp, 'days', true));
-}
-
-function calcLongestStreak(cals) {
-  let tail = cals[0];
-  const longest = cals.reduce((longest, head, index) => {
-    const last = cals[index === 0 ? 0 : index - 1];
-    // is streak broken
-    if (moment(head).diff(last, 'days', true) > daysBetween) {
-      tail = head;
-    }
-    if (dayDiff(longest) < dayDiff([head, tail])) {
-      return [head, tail];
-    }
-    return longest;
-  }, [cals[0], cals[0]]);
-
-  return Math.ceil(dayDiff(longest));
-}
-
-function dayDiff([head, tail]) {
-  return moment(head).diff(tail, 'days', true);
-}
-
 module.exports = function(app) {
   var router = app.loopback.Router();
   var User = app.models.User;