[Backend] Add submitted before/after for challenge submissions (#4456)

* [Documentation] Fix host challenge doc

* Add submitted before and after filters to submission API

* Revert extra change

apps/jobs/views.py

@@ -18,7 +18,7 @@
 from django.core.files.uploadedfile import SimpleUploadedFile
 from django.db import transaction, IntegrityError
 from django.db.models import Count
-from django.utils import timezone
+from django.utils import dateparse, timezone
 
 from rest_framework_expiring_authtoken.authentication import (
     ExpiringTokenAuthentication,
@@ -2004,6 +2004,8 @@ def get_submissions_for_challenge(request, challenge_pk):
         return Response(response_data, status=status.HTTP_400_BAD_REQUEST)
 
     submission_status = request.query_params.get("status", None)
+    submitted_after = request.query_params.get("submitted_after", None)
+    submitted_before = request.query_params.get("submitted_before", None)
 
     valid_submission_status = [
         Submission.SUBMITTED,
@@ -2015,17 +2017,41 @@ def get_submissions_for_challenge(request, challenge_pk):
         Submission.FINISHED,
         Submission.SUBMITTING,
     ]
-
-    if submission_status not in valid_submission_status:
+    if submission_status and submission_status not in valid_submission_status:
         response_data = {
             "error": "Invalid submission status {}".format(submission_status)
         }
         return Response(response_data, status=status.HTTP_400_BAD_REQUEST)
 
+    # expected format: YYYY-MM-DDTHH:MM:SSZ
+    if submitted_after:
+        submitted_after = dateparse.parse_datetime(submitted_after)
+        if not submitted_after:
+            response_data = {
+                "error": "Invalid datetime format for 'submitted_after'"
+            }
+            return Response(response_data, status=status.HTTP_400_BAD_REQUEST)
+
+    if submitted_before:
+        submitted_before = dateparse.parse_datetime(submitted_before)
+        if not submitted_before:
+            response_data = {
+                "error": "Invalid datetime format for 'submitted_before'"
+            }
+            return Response(response_data, status=status.HTTP_400_BAD_REQUEST)
     submissions_done_in_challenge = Submission.objects.filter(
-        challenge_phase__challenge=challenge.id, status=submission_status
+        challenge_phase__challenge=challenge.id
     )
 
+    if submission_status:
+        submissions_done_in_challenge = submissions_done_in_challenge.filter(status=submission_status)
+
+    if submitted_after:
+        submissions_done_in_challenge = submissions_done_in_challenge.filter(submitted_at__gt=submitted_after)
+
+    if submitted_before:
+        submissions_done_in_challenge = submissions_done_in_challenge.filter(submitted_at__lt=submitted_before)
+
     serializer = SubmissionSerializer(
         submissions_done_in_challenge, many=True, context={"request": request}
     )