fix(dates): add information for hour12 format pattern (#30) (#31)

Author: ggkrustev

src/dates.d.ts

@@ -119,6 +119,11 @@ export interface DateFormatPart {
      * Specifies the format names options.
      */
     names?: DateFormatNameOptions;
+
+    /**
+     * Specifies whether a 12-hour time-set should be used for the formatting.
+     */
+    hour12?: boolean;
 }
 
 /**

src/dates/date-pattern.js

@@ -225,4 +225,4 @@ export default function datePattern(format, info) {
     }
 
     return result;
-}
+}

src/dates/split-date-format.js

@@ -52,6 +52,10 @@ function addLiteral(parts, value) {
     }
 }
 
+function isHour12(pattern) {
+    return pattern === 'h';
+}
+
 export default function splitDateFormat(format, locale = 'en') {
     const info = localeInfo(locale);
     const pattern = datePattern(format, info);
@@ -76,6 +80,10 @@ export default function splitDateFormat(format, locale = 'en') {
                 pattern: value
             };
 
+            if (type === 'hour') {
+                part.hour12 = isHour12(value);
+            }
+
             const names = NAME_TYPES[type];
 
             if (names) {
@@ -103,4 +111,4 @@ export default function splitDateFormat(format, locale = 'en') {
     }
 
     return parts;
-}
+}

test/dates.js

@@ -1299,10 +1299,12 @@ describe('splitDateFormat', () => {
             pattern: "eeee"
         }, {
             type: "hour",
-            pattern: "h"
+            pattern: "h",
+            hour12: true
         }, {
             type: "hour",
-            pattern: "HH"
+            pattern: "HH",
+            hour12: false
         }, {
             type: "minute",
             pattern: "m"
@@ -1333,6 +1335,20 @@ describe('splitDateFormat', () => {
 
         expect(splitDateFormat('GyyqQQQMMMMLLLLLdEEccceeeehHHmsaxXzZ')).toEqual(expected);
     });
+
+    it('returns hour12 info in the DatePart', () => {
+        const expected = [{
+            type: 'hour',
+            pattern: 'h',
+            hour12: true
+        }, {
+            type: 'hour',
+            pattern: 'H',
+            hour12: false
+        }];
+
+        expect(splitDateFormat('hH')).toEqual(expected);
+    });
 });