[expo-calendar] Fix recurrence rule and event parsing (#7527)

* [expo-calendar] Fix date parsing

* [expo-calendar] Add test

* [expo-calendar] Add changelog

apps/test-suite/tests/Calendar.js

@@ -337,6 +337,19 @@ export async function test(t) {
         t.expect(typeof eventId).toBe('string');
       });
 
+      t.it('creates an event with the recurrence rule', async () => {
+        const eventId = await createTestEventAsync(calendarId, {
+          recurrenceRule: {
+            endDate: new Date(2019, 3, 5),
+            frequency: 'daily',
+            interval: 1,
+          },
+        });
+
+        t.expect(eventId).toBeDefined();
+        t.expect(typeof eventId).toBe('string');
+      });
+
       if (Platform.OS === 'ios') {
         t.it('rejects when time zone is invalid', async () => {
           let error;

packages/expo-calendar/CHANGELOG.md

@@ -9,3 +9,4 @@
 ### 🐛 Bug fixes
 
 - Fixed `Calendar.getCalendarsAsync` requiring not needed permissions on iOS. ([#7928](https://github.com/expo/expo/pull/7928) by [@lukmccall](https://github.com/lukmccall))
+- Fix `recurrence rule` and `event` parsing. ([#7527](https://github.com/expo/expo/pull/7527) by [@lukmccall](https://github.com/lukmccall))

packages/expo-calendar/src/Calendar.ts

@@ -701,7 +701,11 @@ function stringifyIfDate(date: any): any {
 
 function stringifyDateValues(obj: object): object {
   return Object.keys(obj).reduce((acc, key) => {
-    acc[key] = stringifyIfDate(obj[key]);
+    const value = obj[key];
+    if (typeof value === 'object' && !(value instanceof Date)) {
+      return { ...acc, [key]: stringifyDateValues(value) };
+    }
+    acc[key] = stringifyIfDate(value);
     return acc;
   }, {});
 }