fix(courses): prioritize sorting by date, if they are the same sort b…

…y name in increasing order (#536)

src/features/courses/screens/CourseDirectoryScreen.tsx

@@ -11,6 +11,8 @@ import { CourseDirectory, CourseFileOverview } from '@polito/api-client';
 import { useFocusEffect } from '@react-navigation/native';
 import { NativeStackScreenProps } from '@react-navigation/native-stack';
 
+import { DateTime } from 'luxon';
+
 import { BottomBarSpacer } from '../../../core/components/BottomBarSpacer';
 import { useSafeAreaSpacing } from '../../../core/hooks/useSafeAreaSpacing';
 import {
@@ -59,6 +61,20 @@ export const CourseDirectoryScreen = ({ route, navigation }: Props) => {
     });
   }, [directoryName, navigation, t]);
 
+  directoryQuery.data?.sort((a, b) => {
+    if (a.type !== 'directory' && b.type !== 'directory') {
+      const dateA = DateTime.fromJSDate(a.createdAt).startOf('minute');
+      const dateB = DateTime.fromJSDate(b.createdAt).startOf('minute');
+
+      if (dateA.equals(dateB)) {
+        return a.name.toLowerCase().localeCompare(b.name.toLowerCase());
+      }
+
+      return dateA > dateB ? -1 : 1;
+    }
+    return 0;
+  });
+
   return (
     <CourseContext.Provider value={courseId}>
       <CourseFilesCacheProvider>