fix: left short rebate (#103)

home/admin.py

@@ -5,6 +5,7 @@
 """
 
 import csv
+from datetime import timedelta
 
 from django.contrib import admin
 from django.http import HttpRequest, HttpResponse
@@ -34,6 +35,7 @@
     UnregisteredStudent,
     Update,
 )
+from home.utils.rebate_checker import max_days_rebate
 
 from .resources import (
     AllocationResource,
@@ -46,12 +48,7 @@
 )
 from .utils.django_email_server import long_rebate_query_mail
 from .utils.month import fill_periods, map_periods_to_long_rebate
-from .utils.rebate_bills_saver import (
-    fix_all_bills,
-    save_long_bill,
-    save_short_bill,
-    update_bills,
-)
+from .utils.rebate_bills_saver import fix_all_bills, save_long_bill, update_bills
 
 # Customising the heading and title of the admin page
 admin.site.site_header = "Dining Website Admin Page"
@@ -1028,43 +1025,43 @@ class about_Admin(admin.ModelAdmin):
     actions = ["Add"]
 
     @admin.action(description="Add left short rebate to Bills")
-    def Add(self, request, queryset):
+    def Add(self, request, queryset: list[LeftShortRebate]):
         """
         Export action available in the admin page
         """
         for obj in queryset:
             email = obj.email
             student_obj = Student.objects.filter(email=email).last()
             for period in Period.objects.all():
-                if (
-                    period.start_date <= obj.start_date
-                    and period.end_date >= obj.end_date
-                ):
-                    days = (obj.end_date - obj.start_date).days + 1
+                if period.start_date <= obj.start_date <= period.end_date:
+                    start_date = obj.start_date
+                    end_date = obj.end_date
+                    date_applied = obj.date_applied
+                    if period.end_date < obj.end_date:
+                        obj.start_date = period.end_date + timedelta(days=1)
+                        obj.save()
+                        end_date = period.end_date
+                    else:
+                        obj.delete()
                     allocation = Allocation.objects.filter(
                         email=student_obj, period=period
                     ).last()
                     if allocation:
-                        save_short_bill(
-                            student_obj,
-                            period,
-                            days,
-                            allocation.high_tea,
-                            allocation.caterer,
+                        upper_cap_check = max_days_rebate(
+                            student_obj, start_date, end_date, period
                         )
-                        print("Saved")
+                        if upper_cap_check == 0:
+                            continue
+                        end_date = start_date + timedelta(days=upper_cap_check - 1)
                         short_rebate = Rebate(
                             email=student_obj,
                             allocation_id=allocation,
-                            start_date=obj.start_date,
-                            end_date=obj.end_date,
-                            date_applied=obj.date_applied,
+                            start_date=start_date,
+                            end_date=end_date,
+                            date_applied=date_applied,
                             approved=True,
                         )
                         short_rebate.save()
-                        LeftShortRebate.objects.filter(
-                            email=email, date_applied=obj.date_applied
-                        ).delete()
 
 
 @admin.register(AllocationForm)

home/views.py

@@ -218,11 +218,12 @@ def rebate(request):
                             end_date=end_date,
                             date_applied=date.today(),
                         )
-                        short_left_rebate.save()
                         end_date = period_end
                         upper_cap_check = max_days_rebate(
                             student, start_date, period_end, period_obj
                         )
+                        if upper_cap_check < 0:
+                            short_left_rebate.save()
                         additional_text = " Note: The days after the current period end date will be added to your bills in the next period."
                     else:
                         upper_cap_check = max_days_rebate(