fix: add date handler

lib/utils/__tests__/dateHandling.test.ts

@@ -0,0 +1,11 @@
+import { parseDate } from '../dateHandling'
+
+test.each([
+  ['2020-12-21 09:00', '2020-12-21T08:00:00.000Z'],
+  ['2021-05-28', '2021-05-27T22:00:00.000Z'],
+  ['2 oktober 2020', '2020-10-01T22:00:00.000Z'],
+  ['12 oktober 2020', '2020-10-11T22:00:00.000Z'],
+  ['This is an invalid date', undefined],
+])('handles date parsing of %s', (input, expected) => {
+  expect(parseDate(input)).toEqual(expected)
+})

lib/utils/dateHandling.ts

@@ -0,0 +1,41 @@
+import { DateTime } from 'luxon'
+
+const options = {
+  locale: 'sv',
+}
+
+export const parseDate = (input?: string): string | undefined => {
+  if (!input) {
+    return undefined
+  }
+
+  const dateParse = (format: string) =>
+    DateTime.fromFormat(input, format, options)
+
+  const dateAndTime = dateParse('yyyy-MM-dd HH:mm')
+
+  if (dateAndTime.isValid) {
+    return dateAndTime.toUTC().toISO()
+  }
+
+  const onlyDate = dateParse('yyyy-MM-dd')
+
+  if (onlyDate.isValid) {
+    return onlyDate.toUTC().toISO()
+  }
+
+  const dateLongForm = dateParse('dd MMMM yyyy')
+
+  if (dateLongForm.isValid) {
+    return dateLongForm.toUTC().toISO()
+  }
+
+  const dateLongFormOneDigit = dateParse('d MMMM yyyy')
+
+  if (dateLongFormOneDigit.isValid) {
+    return dateLongFormOneDigit.toUTC().toISO()
+  }
+
+  // Explicit return to satisfy ESLint
+  return undefined
+}