Implement Request.last_submission_date

atst/domain/requests.py

@@ -87,6 +87,8 @@ class Requests(object):
 
     @classmethod
     def submit(cls, request):
+        request = Requests.set_status(request, RequestStatus.SUBMITTED)
+
         new_status = None
         if Requests.should_auto_approve(request):
             new_status = RequestStatus.PENDING_FINANCIAL_VERIFICATION

atst/models/request.py

@@ -5,6 +5,10 @@ from sqlalchemy.orm import relationship
 
 from atst.models import Base
 from atst.models.types import Id
+from atst.models.request_status_event import RequestStatus
+
+def first_or_none(predicate, lst):
+    return next((x for x in lst if predicate(x)), None,)
 
 
 class Request(Base):
@@ -47,3 +51,12 @@ class Request(Base):
         if self.task_order:
             return self.task_order.verified
         return False
+
+    @property
+    def last_submission_date(self):
+        def _is_submission(status_event):
+            return status_event.new_status == RequestStatus.SUBMITTED
+
+        last_submission = first_or_none(_is_submission, reversed(self.status_events))
+        if last_submission:
+            return last_submission.time_created

atst/models/request_status_event.py

@@ -10,6 +10,7 @@ from atst.models.types import Id
 
 class RequestStatus(Enum):
     STARTED = "Started"
+    SUBMITTED = "Submitted"
     PENDING_FINANCIAL_VERIFICATION = "Pending Financial Verification"
     PENDING_CCPO_APPROVAL = "Pending CCPO Approval"
     CHANGES_REQUESTED = "Changes Requested"

tests/domain/test_requests.py

@@ -70,6 +70,15 @@ def test_should_allow_submission(new_request):
     assert not Requests.should_allow_submission(new_request)
 
 
+def test_request_knows_its_last_submission_date(new_request):
+    submitted_request = Requests.submit(new_request)
+    assert submitted_request.last_submission_date
+
+
+def test_request_knows_if_it_has_no_last_submission_date(new_request):
+    assert new_request.last_submission_date is None
+
+
 def test_exists(session):
     user_allowed = UserFactory.create()
     user_denied = UserFactory.create()