MBS-12342: Allow parsing CJK dates

This adds support for Chinese, Taiwanese, Japanese and Korean dates.

Author: reosarevok

root/static/scripts/common/utility/parseNaturalDate.js

@@ -9,6 +9,7 @@
 
 
 const ymdRegex = /^\W*([0-9]{4})(?:\W+(0?[1-9]|1[0-2])(?:\W+(0?[1-9]|[12][0-9]|3[01]))?)?\W*$/;
+const cjkRegex = /^\W*([0-9]{2}|[0-9]{4})(?:(?:\u5E74|\uB144\W?)(0?[1-9]|1[0-2])(?:(?:\u6708|\uC6D4\W?)(0?[1-9]|[12][0-9]|3[01])(?:\u65E5|\uC77C)?)?)?\W*$/;
 
 function cleanDateString(
   str: string,
@@ -48,6 +49,14 @@ function cleanDateString(
     },
   );
 
+  // RoC year numbering - http://en.wikipedia.org/wiki/Minguo_calendar
+  cleanedString = cleanedString.replace(
+    /民國([0-9]{1,3})/,
+    function (match, year) {
+      return String(parseInt(year, 10) + 1911);
+    },
+  );
+
   return cleanedString;
 }
 
@@ -56,7 +65,10 @@ export function parseNaturalDate(
 ): PartialDateStringsT {
   const cleanedString = cleanDateString(str);
 
-  const match = cleanedString.match(ymdRegex) || [];
+  const match = cleanedString.match(cjkRegex) ||
+                cleanedString.match(ymdRegex) ||
+                [];
+
   return {
     /* eslint-disable sort-keys */
     year: match[1] || '',

root/static/scripts/tests/utility/parseNaturalDate.js

@@ -12,7 +12,7 @@ import test from 'tape';
 import parseNaturalDate from '../../common/utility/parseNaturalDate.js';
 
 test('parseNaturalDate', function (t) {
-  t.plan(12);
+  t.plan(15);
 
   /* eslint-disable sort-keys */
   const parseDateTests = [
@@ -46,6 +46,14 @@ test('parseNaturalDate', function (t) {
     // Japanese year codes
     {date: 'O-2-25', expected: {year: '1987', month: '2', day: '25'}},
     {date: 'D-12-10', expected: {year: '1991', month: '12', day: '10'}},
+
+    // CJK dates
+    {date: '2022年4月29日', expected: {year: '2022', month: '4', day: '29'}},
+    {date: '2021년2월1일', expected: {year: '2021', month: '2', day: '1'}},
+    {
+      date: '民國99年12月31日',
+      expected: {year: '2010', month: '12', day: '31'},
+    },
   ];
   /* eslint-enable sort-keys */