HouseHold calculated in the API

app/api/route.ts

@@ -2,6 +2,7 @@ import { NextResponse } from "next/server";
 import { api, apiSchema } from "../schemas/apiSchema";
 import { calculationSchema } from "../schemas/calculationSchema";
 import * as calculationService from "../services/calculationService";
+import calculateFairhold from "@/app/models/testClasses";
 
 export async function POST(req: Request) {
   try {
@@ -14,7 +15,8 @@ export async function POST(req: Request) {
       input = data;
     }
     const householdData = await calculationService.getHouseholdData(input);
-    return NextResponse.json(householdData);
+    const processedData = calculateFairhold(householdData);
+    return NextResponse.json(processedData);
   } catch (err) {
     console.log("ERROR: API - ", (err as Error).message);
     const response = { error: (err as Error).message };

app/components/ui/CalculatorInput.tsx

@@ -3,7 +3,6 @@ import React, { useState } from "react";
 import { useForm } from "react-hook-form";
 import { zodResolver } from "@hookform/resolvers/zod";
 
-import calculateFairhold from "@/app/models/testClasses";
 import { Household } from "@/app/models/Household";
 import Dashboard from "./Dashboard";
 import {
@@ -49,8 +48,7 @@ const CalculatorInput = () => {
       body: JSON.stringify(data), // pass the form data to the API
     });
 
-    const jsonData = await response.json();
-    const processedData = calculateFairhold(jsonData);
+    const processedData = await response.json();
 
     // saved processedData & switch to dashboard view
     setData(processedData);

app/data/rentRepo.ts

@@ -1,24 +1,30 @@
 import prisma from "./db";
 
-const getRentByITL3 = async (itl3: string): Promise<number | null> => {
-    try {
-        const result = await prisma.rent.aggregate({
-            where: {
-                itl3: { equals: itl3 },
-            },
-            _avg: {
-                monthlyMeanRent: true,
-            },
-        });
+const getRentByITL3 = async (itl3: string): Promise<number> => {
+  try {
+    const result = await prisma.rent.aggregate({
+      where: {
+        itl3: { equals: itl3 },
+      },
+      _avg: {
+        monthlyMeanRent: true,
+      },
+    });
 
-        const monthlyMeanRent = result._avg.monthlyMeanRent;
+    const monthlyMeanRent = result._avg.monthlyMeanRent;
 
-        return monthlyMeanRent;
-    } catch (error) {
-        throw new Error(`Data error: Unable to find monthlyMeanRent for itl3 ${itl3}`);
+    if (monthlyMeanRent === null) {
+      throw new Error(`No monthlyMeanRent found for itl3 ${itl3}`);
     }
+
+    return monthlyMeanRent;
+  } catch (error) {
+    throw new Error(
+      `Data error: Unable to find monthlyMeanRent for itl3 ${itl3}`
+    );
+  }
 };
 
 export const rentRepo = {
-    getRentByITL3,
+  getRentByITL3,
 };

app/data/socialRentAdjustmentsRepo.ts

@@ -2,36 +2,51 @@ import prisma from "./db";
 
 export type socialRentAdjustmentTypes = {
   year: string;
-  inflation: string;
-  additional: string;
-  total: string;
+  inflation: number;
+  additional: number;
+  total: number;
 }[];
 
-const getSocialRentAdjustments = async (): Promise<socialRentAdjustmentTypes> => {
+const getSocialRentAdjustments =
+  async (): Promise<socialRentAdjustmentTypes> => {
     try {
-        const result = await prisma.socialRentAdjustments.findMany({
-            select: {
-                year: true,
-                inflation: true,
-                additional: true,
-                total: true,
-            }
-        });
+      const result = await prisma.socialRentAdjustments.findMany({
+        select: {
+          year: true,
+          inflation: true,
+          additional: true,
+          total: true,
+        },
+      });
 
-        const socialRentAdjustments: socialRentAdjustmentTypes = result.map(item => ({
-            year: item.year || '',
-            inflation: item.inflation?.toString() || '',
-            additional: item.additional?.toString() || '',
-            total: item.total?.toString() || '',
-        }));
+      const socialRentAdjustments: socialRentAdjustmentTypes = result.map(
+        (item) => {
+          if (
+            item.year === null ||
+            item.inflation === null ||
+            item.additional === null ||
+            item.total === null
+          ) {
+            throw new Error(
+              `Data error: Found null values in socialRentAdjustments`
+            );
+          }
+          return {
+            year: item.year,
+            inflation: item.inflation,
+            additional: item.additional,
+            total: item.total,
+          };
+        }
+      );
 
-        return socialRentAdjustments;
-        
+      // Return the array after validation
+      return socialRentAdjustments;
     } catch (error) {
-        throw new Error(`Data error: Unable to find socialRentAdjustments`);
+      throw new Error(`Data error: unable to find socialRentAdjustments`);
     }
-};
+  };
 
 export const socialRentAdjustmentsRepo = {
-    getSocialRentAdjustments,
+  getSocialRentAdjustments,
 };

app/models/Household.test.ts

@@ -1,34 +1,149 @@
 import { DEFAULT_FORECAST_PARAMETERS } from "./ForecastParameters";
 import { Household } from "./Household";
 import { Property } from "./Property";
-import { SocialRentAdjustments } from "./tenure/SocialRent";
+import { socialRentAdjustmentTypes } from "../data/socialRentAdjustmentsRepo";
 
 let property: Property;
 let household: Household;
-const socialRentAdjustments: SocialRentAdjustments = [
-  { inflation: 3.3, total: 4.3, year: "2001-02" },
-  { inflation: 1.7, total: 2.2, year: "2002-03" },
-  { inflation: 1.7, total: 2.2, year: "2003-04" },
-  { inflation: 2.8, total: 3.3, year: "2004-05" },
-  { inflation: 3.1, total: 3.6, year: "2005-06" },
-  { inflation: 2.7, total: 3.2, year: "2006-07" },
-  { inflation: 3.6, total: 4.1, year: "2007-08" },
-  { inflation: 3.9, total: 4.4, year: "2008-09" },
-  { inflation: 5.0, total: 5.5, year: "2009-10" },
-  { inflation: -1.4, total: -0.9, year: "2010-11" },
-  { inflation: 4.6, total: 5.1, year: "2011-12" },
-  { inflation: 5.6, total: 6.1, year: "2012-13" },
-  { inflation: 2.6, total: 3.1, year: "2013-14" },
-  { inflation: 3.2, total: 3.7, year: "2014-15" },
-  { inflation: 1.2, total: 2.2, year: "2015-16" },
-  { inflation: NaN, total: -1.0, year: "2016-17" },
-  { inflation: NaN, total: -1.0, year: "2017-18" },
-  { inflation: NaN, total: -1.0, year: "2018-19" },
-  { inflation: NaN, total: -1.0, year: "2019-20" },
-  { inflation: 1.7, total: 2.7, year: "2020-21" },
-  { inflation: 0.5, total: 1.5, year: "2021-22" },
-  { inflation: 3.1, total: 4.1, year: "2022-23" },
-  { inflation: 10.1, total: 11.1, year: "2023-24" },
+const socialRentAdjustments: socialRentAdjustmentTypes = [
+  {
+    inflation: 3.3,
+    total: 4.3,
+    year: "2001-02",
+    additional: 0,
+  },
+  {
+    inflation: 1.7,
+    total: 2.2,
+    year: "2002-03",
+    additional: 0,
+  },
+  {
+    inflation: 1.7,
+    total: 2.2,
+    year: "2003-04",
+    additional: 0,
+  },
+  {
+    inflation: 2.8,
+    total: 3.3,
+    year: "2004-05",
+    additional: 0,
+  },
+  {
+    inflation: 3.1,
+    total: 3.6,
+    year: "2005-06",
+    additional: 0,
+  },
+  {
+    inflation: 2.7,
+    total: 3.2,
+    year: "2006-07",
+    additional: 0,
+  },
+  {
+    inflation: 3.6,
+    total: 4.1,
+    year: "2007-08",
+    additional: 0,
+  },
+  {
+    inflation: 3.9,
+    total: 4.4,
+    year: "2008-09",
+    additional: 0,
+  },
+  {
+    inflation: 5.0,
+    total: 5.5,
+    year: "2009-10",
+    additional: 0,
+  },
+  {
+    inflation: -1.4,
+    total: -0.9,
+    year: "2010-11",
+    additional: 0,
+  },
+  {
+    inflation: 4.6,
+    total: 5.1,
+    year: "2011-12",
+    additional: 0,
+  },
+  {
+    inflation: 5.6,
+    total: 6.1,
+    year: "2012-13",
+    additional: 0,
+  },
+  {
+    inflation: 2.6,
+    total: 3.1,
+    year: "2013-14",
+    additional: 0,
+  },
+  {
+    inflation: 3.2,
+    total: 3.7,
+    year: "2014-15",
+    additional: 0,
+  },
+  {
+    inflation: 1.2,
+    total: 2.2,
+    year: "2015-16",
+    additional: 0,
+  },
+  {
+    inflation: NaN,
+    total: -1.0,
+    year: "2016-17",
+    additional: 0,
+  },
+  {
+    inflation: NaN,
+    total: -1.0,
+    year: "2017-18",
+    additional: 0,
+  },
+  {
+    inflation: NaN,
+    total: -1.0,
+    year: "2018-19",
+    additional: 0,
+  },
+  {
+    inflation: NaN,
+    total: -1.0,
+    year: "2019-20",
+    additional: 0,
+  },
+  {
+    inflation: 1.7,
+    total: 2.7,
+    year: "2020-21",
+    additional: 0,
+  },
+  {
+    inflation: 0.5,
+    total: 1.5,
+    year: "2021-22",
+    additional: 0,
+  },
+  {
+    inflation: 3.1,
+    total: 4.1,
+    year: "2022-23",
+    additional: 0,
+  },
+  {
+    inflation: 10.1,
+    total: 11.1,
+    year: "2023-24",
+    additional: 0,
+  },
 ];
 
 beforeEach(() => {

app/models/Household.ts

@@ -4,8 +4,9 @@ import { FairholdLandPurchase } from "./tenure/FairholdLandPurchase";
 import { FairholdLandRent } from "./tenure/FairholdLandRent";
 import { Fairhold } from "./Fairhold";
 import { Property } from "./Property";
-import { SocialRent, SocialRentAdjustments } from "./tenure/SocialRent";
+import { SocialRent } from "./tenure/SocialRent";
 import { ForecastParameters } from "./ForecastParameters";
+import { socialRentAdjustmentTypes } from "../data/socialRentAdjustmentsRepo";
 
 const HOUSE_MULTIPLIER = 2.4;
 
@@ -15,7 +16,7 @@ type ConstructorParams = Pick<
 > & {
   averageRentYearly: number;
   socialRentAverageEarning: number;
-  socialRentAdjustments: SocialRentAdjustments;
+  socialRentAdjustments: socialRentAdjustmentTypes;
   housePriceIndex: number;
 };
 

app/models/tenure/SocialRent.test.ts

@@ -1,9 +1,10 @@
-import { SocialRent, SocialRentAdjustments } from "./SocialRent";
+import { SocialRent } from "./SocialRent";
+import { socialRentAdjustmentTypes } from "../../data/socialRentAdjustmentsRepo";
 
 let tenureSocialRent: SocialRent;
 
 beforeEach(() => {
-  const socialRentAdjustments: SocialRentAdjustments = [
+  const socialRentAdjustments: socialRentAdjustmentTypes = [
     {
       inflation: 3.3,
       total: 4.3,

app/models/tenure/SocialRent.ts

@@ -1,22 +1,15 @@
 import { WEEKS_PER_MONTH } from "../constants";
 import { BED_WEIGHTS_AND_CAPS, NATIONAL_AVERAGES } from "../constants";
+import { socialRentAdjustmentTypes } from "../../data/socialRentAdjustmentsRepo";
 
 interface SocialRentParams {
   numberOfBedrooms: number;
   socialRentAverageEarning: number;
-  socialRentAdjustments: SocialRentAdjustments;
+  socialRentAdjustments: socialRentAdjustmentTypes;
   housePriceIndex: number;
   landToTotalRatio: number;
 }
 
-export type SocialRentAdjustments = {
-  year: string;
-  inflation: number;
-  // TODO: Is this optional or required?
-  additional?: number;
-  total: number;
-}[];
-
 export class SocialRent {
   socialRentAverageEarning: number;
   /** adjustment factors that take into account the increase of living cost  */