feat: Add custom parser for Reddit (#307)

Author: toufic-m

fixtures/www.reddit.com/1551705199548.html

@@ -27,6 +27,21 @@ export const SEC_DATE_STRING = /^\d{10}$/i;
 export const CLEAN_DATE_STRING_RE = /^\s*published\s*:?\s*(.*)/i;
 export const TIME_MERIDIAN_SPACE_RE = /(.*\d)(am|pm)(.*)/i;
 export const TIME_MERIDIAN_DOTS_RE = /\.m\./i;
+export const TIME_NOW_STRING = /^\s*(just|right)?\s*now\s*/i;
+const timeUnits = [
+  'seconds?',
+  'minutes?',
+  'hours?',
+  'days?',
+  'weeks?',
+  'months?',
+  'years?',
+];
+const allTimeUnits = timeUnits.join('|');
+export const TIME_AGO_STRING = new RegExp(
+  `(\\d+)\\s+(${allTimeUnits})\\s+ago`,
+  'i'
+);
 const months = [
   'jan',
   'feb',

fixtures/www.reddit.com/1552069905710.html

@@ -9,6 +9,8 @@ import {
   SEC_DATE_STRING,
   CLEAN_DATE_STRING_RE,
   SPLIT_DATE_STRING,
+  TIME_AGO_STRING,
+  TIME_NOW_STRING,
   TIME_MERIDIAN_SPACE_RE,
   TIME_MERIDIAN_DOTS_RE,
   TIME_WITH_OFFSET_RE,
@@ -28,6 +30,15 @@ export function createDate(dateString, timezone, format) {
     return moment(new Date(dateString));
   }
 
+  if (TIME_AGO_STRING.test(dateString)) {
+    const fragments = TIME_AGO_STRING.exec(dateString);
+    return moment().subtract(fragments[1], fragments[2]);
+  }
+
+  if (TIME_NOW_STRING.test(dateString)) {
+    return moment();
+  }
+
   return timezone
     ? moment.tz(dateString, format || parseFormat(dateString), timezone)
     : moment(dateString, format || parseFormat(dateString));