Lightly refactor prettyTime module.

app/assets/javascripts/lib/utils/pretty_time.js

 import _ from 'underscore';
 
-(() => {
-  /*
+/*
  * TODO: Make these methods more configurable (e.g. stringifyTime condensed or
  * non-condensed, abbreviateTimelengths)
  * */
 
-  const utils = window.gl.utils = gl.utils || {};
-  const prettyTime = utils.prettyTime = {
-    /*
+/*
  * Accepts seconds and returns a timeObject { weeks: #, days: #, hours: #, minutes: # }
  * Seconds can be negative or positive, zero or non-zero. Can be configured for any day
  * or week length.
-    */
-    parseSeconds(seconds, { daysPerWeek = 5, hoursPerDay = 8 } = {}) {
+*/
+
+export function parseSeconds(seconds, { daysPerWeek = 5, hoursPerDay = 8 } = {}) {
   const DAYS_PER_WEEK = daysPerWeek;
   const HOURS_PER_DAY = hoursPerDay;
   const MINUTES_PER_HOUR = 60;
@@ -27,7 +25,7 @@ import _ from 'underscore';
     minutes: 1,
   };
 
-      let unorderedMinutes = prettyTime.secondsToMinutes(seconds);
+  let unorderedMinutes = Math.abs(seconds / MINUTES_PER_HOUR);
 
   return _.mapObject(timePeriodConstraints, (minutesPerPeriod) => {
     const periodCount = Math.floor(unorderedMinutes / minutesPerPeriod);
@@ -36,33 +34,28 @@ import _ from 'underscore';
 
     return periodCount;
   });
-    },
+}
 
-    /*
-    * Accepts a timeObject and returns a condensed string representation of it
-    * (e.g. '1w 2d 3h 1m' or '1h 30m'). Zero value units are not included.
-    */
+/*
+* Accepts a timeObject (see parseSeconds) and returns a condensed string representation of it
+* (e.g. '1w 2d 3h 1m' or '1h 30m'). Zero value units are not included.
+*/
 
-    stringifyTime(timeObject) {
+export function stringifyTime(timeObject) {
   const reducedTime = _.reduce(timeObject, (memo, unitValue, unitName) => {
     const isNonZero = !!unitValue;
     return isNonZero ? `${memo} ${unitValue}${unitName.charAt(0)}` : memo;
   }, '').trim();
   return reducedTime.length ? reducedTime : '0m';
-    },
+}
 
-    /*
-    * Accepts a time string of any size (e.g. '1w 2d 3h 5m' or '1w 2d') and returns
-    *  the first non-zero unit/value pair.
-    */
+/*
+* Accepts a time string of any size (e.g. '1w 2d 3h 5m' or '1w 2d') and returns
+*  the first non-zero unit/value pair.
+*/
 
-    abbreviateTime(timeStr) {
+export function abbreviateTime(timeStr) {
   return timeStr.split(' ')
     .filter(unitStr => unitStr.charAt(0) !== '0')[0];
-    },
+}
 
-    secondsToMinutes(seconds) {
-      return Math.abs(seconds / 60);
-    },
-  };
-})(window.gl || (window.gl = {}));

app/assets/javascripts/sidebar/components/time_tracking/collapsed_state.js

 import stopwatchSvg from 'icons/_icon_stopwatch.svg';
-
-import '../../../lib/utils/pretty_time';
+import { abbreviateTime } from '../../../lib/utils/pretty_time';
 
 export default {
   name: 'time-tracking-collapsed-state',
@@ -79,7 +78,7 @@ export default {
   },
   methods: {
     abbreviateTime(timeStr) {
-      return gl.utils.prettyTime.abbreviateTime(timeStr);
+      return abbreviateTime(timeStr);
     },
   },
   template: `

app/assets/javascripts/sidebar/components/time_tracking/comparison_pane.js

-import '../../../lib/utils/pretty_time';
-
-const prettyTime = gl.utils.prettyTime;
+import { parseSeconds, stringifyTime } from '../../../lib/utils/pretty_time';
 
 export default {
   name: 'time-tracking-comparison-pane',
@@ -23,12 +21,12 @@ export default {
     },
   },
   computed: {
-    parsedRemaining() {
+    parsedTimeRemaining() {
       const diffSeconds = this.timeEstimate - this.timeSpent;
-      return prettyTime.parseSeconds(diffSeconds);
+      return parseSeconds(diffSeconds);
     },
     timeRemainingHumanReadable() {
-      return prettyTime.stringifyTime(this.parsedRemaining);
+      return stringifyTime(this.parsedTimeRemaining);
     },
     timeRemainingTooltip() {
       const prefix = this.timeRemainingMinutes < 0 ? 'Over by' : 'Time remaining:';
@@ -44,13 +42,6 @@ export default {
     timeRemainingStatusClass() {
       return this.timeEstimate >= this.timeSpent ? 'within_estimate' : 'over_estimate';
     },
-    /* Parsed time values */
-    parsedEstimate() {
-      return prettyTime.parseSeconds(this.timeEstimate);
-    },
-    parsedSpent() {
-      return prettyTime.parseSeconds(this.timeSpent);
-    },
   },
   template: `
     <div class="time-tracking-comparison-pane">