fix(Auto Attendance): incorrect previous shift computation for a timestamp leading to incorrect absent marking (backport #1703)

hrms/hr/doctype/shift_assignment/shift_assignment.py

@@ -459,7 +459,11 @@ def get_prev_or_next_shift(
 		for date_range in shift_dates:
 			# midnight shifts will span more than a day
 			start_date, end_date = date_range[0], add_days(date_range[1], 1)
-			reverse = next_shift_direction == "reverse"
+
+			if reverse := (next_shift_direction == "reverse"):
+				end_date = min(end_date, for_timestamp.date())
+			elif next_shift_direction == "forward":
+				start_date = max(start_date, for_timestamp.date())
 
 			for dt in generate_date_range(start_date, end_date, reverse=reverse):
 				shift_details = get_employee_shift(

hrms/hr/doctype/shift_assignment/test_shift_assignment.py

@@ -295,3 +295,36 @@ def test_consecutive_day_and_night_shifts(self):
 		self.assertEqual(checkin.shift_type, checkout.shift_type)
 		self.assertEqual(checkin.actual_start.date(), today)
 		self.assertEqual(checkout.actual_end.date(), today)
+
+	def test_shift_details_on_consecutive_days_with_overlapping_timings(self):
+		# defaults
+		employee = make_employee("[email protected]", company="_Test Company")
+		today = getdate()
+		yesterday = add_days(today, -1)
+
+		# shift 1
+		shift_type = setup_shift_type(shift_type="Morning", start_time="07:00:00", end_time="12:00:00")
+		make_shift_assignment(shift_type.name, employee, add_days(yesterday, -1), yesterday)
+
+		# shift 2
+		shift_type = setup_shift_type(shift_type="Afternoon", start_time="09:30:00", end_time="14:00:00")
+		make_shift_assignment(shift_type.name, employee, today, add_days(today, 1))
+
+		# current_shift shift log - checkin in the grace period of current shift, non-overlapping with prev shift
+		current_shift = get_actual_start_end_datetime_of_shift(
+			employee, get_datetime(f"{today} 14:01:00"), True
+		)
+		self.assertEqual(current_shift.shift_type.name, "Afternoon")
+		self.assertEqual(current_shift.actual_start, get_datetime(f"{today} 08:30:00"))
+		self.assertEqual(current_shift.actual_end, get_datetime(f"{today} 15:00:00"))
+
+		# previous shift
+		checkin = get_actual_start_end_datetime_of_shift(
+			employee, get_datetime(f"{yesterday} 07:01:00"), True
+		)
+		checkout = get_actual_start_end_datetime_of_shift(
+			employee, get_datetime(f"{yesterday} 13:00:00"), True
+		)
+		self.assertTrue(checkin.shift_type.name == checkout.shift_type.name == "Morning")
+		self.assertEqual(checkin.actual_start, get_datetime(f"{yesterday} 06:00:00"))
+		self.assertEqual(checkout.actual_end, get_datetime(f"{yesterday} 13:00:00"))

hrms/hr/doctype/shift_type/test_shift_type.py

@@ -371,6 +371,29 @@ def test_mark_absent_for_dates_with_no_attendance_for_midnight_shift(self):
 		self.assertEqual(len(absent_records), 2)
 
 	def test_do_not_mark_absent_before_shift_actual_end_time(self):
+		from hrms.hr.doctype.employee_checkin.test_employee_checkin import make_checkin
+
+		employee = make_employee("[email protected]", company="_Test Company")
+		today = getdate()
+		yesterday = add_days(today, -1)
+
+		# shift 1
+		shift_1 = setup_shift_type(shift_type="Morning", start_time="07:00:00", end_time="12:30:00")
+		make_shift_assignment(shift_1.name, employee, add_days(yesterday, -1), yesterday)
+
+		# shift 2
+		shift_2 = setup_shift_type(shift_type="Afternoon", start_time="09:30:00", end_time="18:00:00")
+		make_shift_assignment(shift_2.name, employee, today, add_days(today, 1))
+
+		# update last sync of checkin for shift 2
+		shift_2.process_attendance_after = add_days(today, -2)
+		shift_2.last_sync_of_checkin = datetime.combine(today, get_time("09:01:00"))
+		shift_2.save()
+		shift_2.process_auto_attendance()
+
+		self.assertIsNone(frappe.db.get_value("Attendance", {"attendance_date": today, "employee": employee}))
+
+	def test_do_not_mark_absent_before_shift_actual_end_time_for_midnight_shift(self):
 		"""
 		Tests employee is not marked absent for a shift spanning 2 days
 		before its actual end time