Add PayUplift model and multiply pay periods by pay uplift

core/admin.py

@@ -12,7 +12,7 @@
 from django.views.decorators.csrf import csrf_exempt
 
 from core.export_data import export_logentry_iterator
-from core.models import CommandLog, FinancialYear
+from core.models import CommandLog, FinancialYear, PayUplift
 from core.utils.export_helpers import (
     export_csv_from_import,
     export_to_csv,
@@ -368,6 +368,25 @@ def has_delete_permission(self, request, obj=None):
         return False
 
 
+class PayUpliftAdmin(admin.ModelAdmin):
+    list_display = (
+        "financial_year",
+        "apr",
+        "may",
+        "jun",
+        "jul",
+        "aug",
+        "sep",
+        "oct",
+        "nov",
+        "dec",
+        "jan",
+        "feb",
+        "mar",
+    )
+
+
 admin.site.register(LogEntry, LogEntryAdmin)
 admin.site.register(FinancialYear, FinancialYearAdmin)
 admin.site.register(CommandLog, CustomLogModelAdmin)
+admin.site.register(PayUplift, PayUpliftAdmin)

core/migrations/0014_payuplift.py

@@ -0,0 +1,47 @@
+# Generated by Django 5.1.3 on 2024-12-06 15:33
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("core", "0013_alter_historicalgroup_options_and_more"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="PayUplift",
+            fields=[
+                (
+                    "id",
+                    models.AutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("apr", models.FloatField(default=1.0)),
+                ("may", models.FloatField(default=1.0)),
+                ("jun", models.FloatField(default=1.0)),
+                ("jul", models.FloatField(default=1.0)),
+                ("aug", models.FloatField(default=1.0)),
+                ("sep", models.FloatField(default=1.0)),
+                ("oct", models.FloatField(default=1.0)),
+                ("nov", models.FloatField(default=1.0)),
+                ("dec", models.FloatField(default=1.0)),
+                ("jan", models.FloatField(default=1.0)),
+                ("feb", models.FloatField(default=1.0)),
+                ("mar", models.FloatField(default=1.0)),
+                (
+                    "financial_year",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.PROTECT,
+                        to="core.financialyear",
+                    ),
+                ),
+            ],
+        ),
+    ]

core/models.py

@@ -87,6 +87,25 @@ def __str__(self):
         return str(self.financial_year_display)
 
 
+class PayUplift(models.Model):
+    financial_year = models.ForeignKey(
+        FinancialYear,
+        on_delete=models.PROTECT,
+    )
+    apr = models.FloatField(default=1.0)
+    may = models.FloatField(default=1.0)
+    jun = models.FloatField(default=1.0)
+    jul = models.FloatField(default=1.0)
+    aug = models.FloatField(default=1.0)
+    sep = models.FloatField(default=1.0)
+    oct = models.FloatField(default=1.0)
+    nov = models.FloatField(default=1.0)
+    dec = models.FloatField(default=1.0)
+    jan = models.FloatField(default=1.0)
+    feb = models.FloatField(default=1.0)
+    mar = models.FloatField(default=1.0)
+
+
 # Track changes to permissions
 register(Permission, app=__package__, inherit=True)
 register(get_user_model(), app=__package__, inherit=True)

payroll/services/payroll.py

@@ -9,7 +9,7 @@
 from django.db.models import Avg, Count, Q
 
 from core.constants import MONTHS
-from core.models import FinancialYear
+from core.models import FinancialYear, PayUplift
 from core.types import MonthsDict
 from costcentre.models import CostCentre
 from gifthospitality.models import Grade
@@ -75,10 +75,15 @@ def payroll_forecast_report(
         cost_centre=cost_centre,
         pay_periods__year=financial_year,
     )
+    pay_uplift_obj = PayUplift.objects.filter(financial_year=financial_year).first()
+    pay_uplift = pay_uplift_to_numpy_array(pay_uplift_obj)
+
     for employee in employee_qs.iterator():
         periods = employee.pay_periods.first().periods
         periods = np.array(periods)
 
+        periods = periods * pay_uplift
+
         prog_report = report[employee.programme_code_id]
         prog_report[settings.PAYROLL.BASIC_PAY_NAC] += periods * employee.basic_pay
         prog_report[settings.PAYROLL.PENSION_NAC] += periods * employee.pension
@@ -109,6 +114,28 @@ def payroll_forecast_report(
             )
 
 
+def pay_uplift_to_numpy_array(instance):
+    if instance is None:
+        return np.ones(12)
+
+    fields = [
+        "apr",
+        "may",
+        "jun",
+        "jul",
+        "aug",
+        "sep",
+        "oct",
+        "nov",
+        "dec",
+        "jan",
+        "feb",
+        "mar",
+    ]
+
+    return np.array([getattr(instance, field, 1.0) for field in fields])
+
+
 # TODO (FFT-131): Apply caching to the average salary calculation
 def get_average_salary_for_grade(grade: Grade, cost_centre: CostCentre) -> int:
     employee_count_threshold = settings.PAYROLL.AVERAGE_SALARY_THRESHOLD