Merged in task/dspace-cris-2023_02_x/DSC-1833 (pull request DSpace#2326)

[CST-15289] fix locale working badly for timezones with negative UTC offset

Approved-by: Alisa Ismailati

src/app/shared/date.util.spec.ts

@@ -1,4 +1,11 @@
-import { dateToString, dateToNgbDateStruct, dateToISOFormat, isValidDate, yearFromString } from './date.util';
+import {
+  dateToString,
+  dateToNgbDateStruct,
+  dateToISOFormat,
+  isValidDate,
+  yearFromString,
+  localeDate
+} from './date.util';
 
 describe('Date Utils', () => {
 
@@ -104,4 +111,15 @@ describe('Date Utils', () => {
             expect(yearFromString('test')).toBeNull();
         });
     });
+
+    describe('localeDate', () => {
+      it('should return the date in the current locale', () => {
+        expect(localeDate('2022-06-03', 'en')).toEqual('June 3, 2022');
+        expect(localeDate('2022-06-03', 'it')).toEqual('3 giugno 2022');
+        expect(localeDate('2022-06', 'en')).toEqual('June 2022');
+        expect(localeDate('2022-06', 'it')).toEqual('giugno 2022');
+        expect(localeDate('2022', 'en')).toEqual('2022');
+        expect(localeDate('2022', 'it')).toEqual('2022');
+      });
+    });
 });

src/app/shared/date.util.ts

@@ -108,16 +108,19 @@ export function yearFromString(date: string) {
 }
 
 
-export function localeDate(date: string, locale?: string) {
+export function localeDate(date: string, locale?: string): string {
+  const parts = date.split('-').map(part => parseInt(part, 10));
+  const year = parts[0];
+  const month = parts.length > 1 ? parts[1] - 1 : 0; // Default to January if no month
+  const day = parts.length > 2 ? parts[2] : 1; // Default to the first day if no day
 
-  const tokens = date.split('-').length;
+  const dateObj = new Date(year, month, day);
 
-  const options: Intl.DateTimeFormatOptions  = {
+  const options: Intl.DateTimeFormatOptions = {
     year: 'numeric',
-    month: tokens >= 2 ? 'long' : undefined,
-    day: tokens >= 3 ? 'numeric' : undefined,
+    month: parts.length > 1 ? 'long' : undefined, // Show month only if provided
+    day: parts.length > 2 ? 'numeric' : undefined, // Show day only if provided
   };
 
-  return new Date(date).toLocaleDateString(locale, options);
-
+  return dateObj.toLocaleDateString(locale, options);
 }