1 files changed, 65 insertions, 0 deletions
diff --git a/app/assets/javascripts/lib/utils/pretty_time.js b/app/assets/javascripts/lib/utils/pretty_time.js
new file mode 100644
index 00000000000..ae397212e55
--- /dev/null
+++ b/app/assets/javascripts/lib/utils/pretty_time.js
@@ -0,0 +1,65 @@
+(() => {
+  /*
+   * TODO: Make these methods more configurable (e.g. parseSeconds timePeriodContstraints,
+   * 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.
+    */
+    parseSeconds(seconds) {
+      const DAYS_PER_WEEK = 5;
+      const HOURS_PER_DAY = 8;
+      const MINUTES_PER_HOUR = 60;
+      const MINUTES_PER_WEEK = DAYS_PER_WEEK * HOURS_PER_DAY * MINUTES_PER_HOUR;
+      const MINUTES_PER_DAY = HOURS_PER_DAY * MINUTES_PER_HOUR;
+
+      const timePeriodConstraints = {
+        weeks: MINUTES_PER_WEEK,
+        days: MINUTES_PER_DAY,
+        hours: MINUTES_PER_HOUR,
+        minutes: 1,
+      };
+
+      let unorderedMinutes = prettyTime.secondsToMinutes(seconds);
+
+      return _.mapObject(timePeriodConstraints, (minutesPerPeriod) => {
+        const periodCount = Math.floor(unorderedMinutes / minutesPerPeriod);
+
+        unorderedMinutes -= (periodCount * minutesPerPeriod);
+
+        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.
+    */
+
+    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.
+    */
+
+    abbreviateTime(timeStr) {
+      return timeStr.split(' ')
+        .filter(unitStr => unitStr.charAt(0) !== '0')[0];
+    },
+
+    secondsToMinutes(seconds) {
+      return Math.abs(seconds / 60);
+    },
+  };
+})(window.gl || (window.gl = {}));