components/company-info/CompanyInfo.tsx

@@ -2,6 +2,7 @@ import { Typography } from '@mui/material';
 import { Box } from '@mui/system';
 import { useTranslation } from 'next-i18next';
 import Image from 'next/image';
+
 const CompanyInfo: React.FC = () => {
   const { t } = useTranslation('home');
   return (

components/filter-sort/FilterSort.tsx

@@ -1,12 +1,13 @@
 import { Box } from '@mui/system';
 import ProductType from '../product-type/ProductType';
 import Sort from '../sort/Sort';
+import { SelectChangeEvent } from "@mui/material";
 
 interface FilterSortProps {
     sort: string;
-    handleSortChange: () => void;
+    handleSortChange: (e: SelectChangeEvent) => void;
     productType: string;
-    handleProductTypeChange: () => void;
+    handleProductTypeChange: (e: SelectChangeEvent) => void;
 }
 
 const FilterSort: React.FC<FilterSortProps> = ({

components/forms/forgot-password/ForgotPasswordForm.tsx

@@ -14,9 +14,9 @@ import { LOGIN_PAGE } from '../../../constants/pages';
 import { forgotPasswordSchema } from '../../../schemas/forgotPasswordSchema';
 
 const ForgotPasswordForm = () => {
-    const { t } = useTranslation('forms', 'forgotPass', 'common');
+    const { t } = useTranslation(['forms', 'forgotPass', 'common']);
 
-    const handleSubmit = (values) => {
+    const handleSubmit = (values: {email: string}) => {
         console.log('Values', values);
     };
 

components/forms/login/LoginForm.tsx

@@ -22,8 +22,13 @@ import {
 import { loginSchema } from '../../../schemas/loginSchema';
 import ErrorMessageComponent from '../../mui/ErrorMessageComponent';
 
+interface Values {
+    username: string;
+    password: string;
+}
+
 const LoginForm = () => {
-    const { t } = useTranslation('forms', 'login');
+    const { t } = useTranslation(['forms', 'login']);
     const [showPassword, setShowPassword] = useState(false);
     const handleClickShowPassword = () => setShowPassword(!showPassword);
     const handleMouseDownPassword = () => setShowPassword(!showPassword);
@@ -31,16 +36,16 @@ const LoginForm = () => {
     const router = useRouter();
     const [error, setError] = useState({ hasError: false, errorMessage: '' });
 
-    const submitHandler = async (values) => {
+    const submitHandler = async (values: Values) => {
         const result = await signIn('credentials', {
             redirect: false,
             username: values.username,
             password: values.password,
         });
-        if (!result.error) {
+        if (!result?.error) {
             router.replace(BASE_PAGE);
         } else {
-            setError({ hasError: true, errorMessage: result.error });
+            setError({ hasError: true, errorMessage: result?.error });
         }
     };
 

components/forms/register/RegisterForm.tsx

@@ -19,8 +19,20 @@ import { createUser } from '../../../requests/accounts/accountRequests';
 import { registerSchema } from '../../../schemas/registerSchema';
 import ErrorMessageComponent from '../../mui/ErrorMessageComponent';
 
+interface Values {
+    fullName: string;
+    username: string;
+    email: string;
+    password: string;
+    address: string;
+    address2: string;
+    city: string;
+    country: string;
+    postcode: string;
+}
+
 const RegisterForm = () => {
-    const { t } = useTranslation('forms', 'register');
+    const { t } = useTranslation(['forms', 'register']);
     const router = useRouter();
 
     const [showPassword, setShowPassword] = useState(false);
@@ -35,7 +47,7 @@ const RegisterForm = () => {
 
     const [error, setError] = useState({ hasError: false, errorMessage: '' });
 
-    const submitHandler = async (values) => {
+    const submitHandler = async (values: Values) => {
         try {
             const result = await createUser(
                 values.fullName,
@@ -50,7 +62,9 @@ const RegisterForm = () => {
             );
             router.push(LOGIN_PAGE);
         } catch (error) {
-            setError({ hasError: true, errorMessage: error.message });
+            if (error instanceof Error) {
+                setError({ hasError: true, errorMessage: error?.message });
+            }
         }
     };
 

components/grid-item/GridItem.tsx

@@ -1,6 +1,10 @@
 import { Grid } from '@mui/material';
 
-const GridItem = ({ children }) => {
+interface Props {
+  children: JSX.Element
+}
+
+const GridItem: React.FC<Props> = ({ children }) => {
   return (
     <Grid item md={4} sm={6} xs={12} sx={{ mb: '100px' }}>
       {children}

components/hero/Hero.tsx

@@ -5,7 +5,7 @@ import Image from 'next/image';
 import { useRouter } from 'next/router';
 import { PRODUCTS_PAGE } from '../../constants/pages';
 
-const Hero = () => {
+const Hero: React.FC = () => {
     const { t } = useTranslation('home');
 
     const router = useRouter();

components/loader/basic-spinner/LoadSpinner.tsx

@@ -1,6 +1,6 @@
 const { CircularProgress, Box } = require('@mui/material');
 
-const LoadingSpinner = () => {
+const LoadingSpinner: React.FC = () => {
     return (
         <Box display="flex" justifyContent="center" sx={{ mt: 5 }}>
             <CircularProgress />

components/product-type/ProductType.tsx

@@ -1,9 +1,9 @@
-import { FormControl, InputLabel, MenuItem, Select } from '@mui/material';
+import { FormControl, InputLabel, MenuItem, Select, SelectChangeEvent } from '@mui/material';
 import { useTranslation } from 'next-i18next';
 
 interface ProductTypeProps {
     productType: string;
-    handleProductTypeChange: () => void;
+    handleProductTypeChange: (e: SelectChangeEvent) => void;
 }
 
 const ProductType: React.FC<ProductTypeProps> = ({ productType, handleProductTypeChange }) => {

components/products-content/ProductsContent.tsx

@@ -1,3 +1,4 @@
+import { SelectChangeEvent } from '@mui/material';
 import { Box } from '@mui/system';
 import Head from 'next/head';
 import { useState } from 'react';
@@ -6,27 +7,21 @@ import FilterSort from '../filter-sort/FilterSort';
 import LoadingSpinner from '../loader/basic-spinner/LoadSpinner';
 import ProductsGrid from '../products-grid/ProductsGrid';
 import ProductsHero from '../products-hero/ProductsHero';
-import { SelectChangeEvent } from "@mui/material";
 
-const ProductsContent = () => {
+const ProductsContent: React.FC = () => {
   const [filter, setFilter] = useState<string>('');
   const [sort, setSort] = useState<string>('');
   const { data, isLoading, fetchNextPage, hasNextPage, isFetchingNextPage } =
     useInfiniteProducts(filter, sort);
 
-  const handleProductTypeChange = () => {
-    return (event: SelectChangeEvent) => {
-      const filterText = event.target.value;
-      setFilter(filterText);
-    }
+  const handleProductTypeChange = (event: SelectChangeEvent) => {
+    const filterText = event.target.value;
+    setFilter(filterText);
   };
 
-  const handleSortChange = () => {
-    return (event: SelectChangeEvent) => {
-      const sort = event.target.value;
-      setSort(sort);
-    }
-
+  const handleSortChange = (event: SelectChangeEvent) => {
+    const sort = event.target.value;
+    setSort(sort);
   };
 
   return (

components/products-grid/ProductsGrid.tsx

@@ -1,10 +1,30 @@
 import { Container, Grid } from '@mui/material';
 import { Box } from '@mui/system';
+import { ProductDataDB } from '../../utils/interface/productInterface';
 import LoadMore from '../buttons/load-more/LoadMore';
 import GridItem from '../grid-item/GridItem';
 import ProductCard from '../product-card/ProductCard';
 
-const ProductsGrid = ({
+interface PageProps {
+    message: string;
+    next: string;
+    prevous: string;
+    product: ProductDataDB[];
+    productCount: number;
+}
+
+interface ProductsProps {
+    pages: PageProps[];
+}
+
+interface Props {
+    allProducts: ProductsProps
+    hasNextPage: boolean;
+    isFetchingNextPage: boolean;
+    fetchNextPage: () => void;
+}
+
+const ProductsGrid: React.FC<Props> = ({
     allProducts,
     hasNextPage,
     fetchNextPage,

components/products-hero/ProductsHero.tsx

@@ -2,7 +2,7 @@ import { Container, Typography } from '@mui/material';
 import { Box } from '@mui/system';
 import { useTranslation } from 'next-i18next';
 
-const ProductsHero = () => {
+const ProductsHero: React.FC = () => {
     const { t } = useTranslation('products');
     return (
         <Box

components/products/featured-product/ProductInfo.tsx

@@ -3,7 +3,6 @@ import { Box } from '@mui/system';
 import { useTranslation } from 'next-i18next';
 import Image from 'next/image';
 import { useState } from 'react';
-import { ProductDataDB } from '../../../utils/interface/productInterface';
 
 interface DataProps {
     name: string;

components/sort/Sort.tsx

@@ -1,9 +1,9 @@
-import { FormControl, InputLabel, MenuItem, Select } from '@mui/material';
+import { FormControl, InputLabel, MenuItem, Select, SelectChangeEvent } from '@mui/material';
 import { useTranslation } from 'next-i18next';
 
 interface SortProps {
     sort: string;
-    handleSortChange: () => void;
+    handleSortChange: (e: SelectChangeEvent) => void;
 }
 
 const Sort: React.FC<SortProps> = ({ sort, handleSortChange }) => {

hooks/useInfiniteQuery.ts

@@ -12,7 +12,7 @@ export const useInfiniteProducts = (category: string, filter: string) => {
       ),
     {
       getNextPageParam: (lastPage, pages) => {
-        if (lastPage.next !== null) {
+        if (lastPage.next !== '') {
           return pages.length + 1;
         }
       },

pages/index.tsx

@@ -11,9 +11,13 @@ import CompanyInfo from '../components/company-info/CompanyInfo';
 import { useUserUpdate } from '../store/user-context';
 import { getStorage } from '../utils/helpers/storage';
 import { useEffect } from 'react';
+import { ProductDataDB } from '../utils/interface/productInterface';
 
+interface Props {
+  data: { featuredProducts: ProductDataDB[], message: string };
+}
 
-const Home: NextPage = ({ featuredProducts }) => {
+const Home: NextPage<Props> = ({ data }) => {
   const { data: session } = useSession();
   const { addUser } = useUserUpdate();
 
@@ -33,7 +37,7 @@ const Home: NextPage = ({ featuredProducts }) => {
         </Head>
         <Hero />
         <FeaturedProductsList
-          featuredProducts={featuredProducts}
+          featuredProducts={data.featuredProducts}
         ></FeaturedProductsList>
         <Features />
         <CompanyInfo />
@@ -44,19 +48,17 @@ const Home: NextPage = ({ featuredProducts }) => {
 
 export async function getStaticProps({ locale }: any) {
   try {
-    const { message, featuredProducts } = await getFeaturedProducts();
+    const data = await getFeaturedProducts();
     return {
       props: {
         ...(await serverSideTranslations(locale, ["home"])),
-        message,
-        featuredProducts,
+        data: data
       },
     };
   } catch (error) {
     return {
       props: {
         ...(await serverSideTranslations(locale, ['home'])),
-        errorMessage: error,
         featuredProducts: [],
       },
     };

pages/products/[customId].tsx

@@ -14,30 +14,31 @@ import TabContent from '../../components/tab-content/TabContent';
 import { useFetchSingleProduct } from '../../hooks/useFetchProductData';
 import { getProductData } from '../../requests/products/producDataRequest';
 import { useStore, useStoreUpdate } from '../../store/cart-context';
+import { SingleProductResponseGet } from '../../utils/interface/productInterface';
 
-const SingleProduct: NextPage = () => {
+interface Props {
+  data: SingleProductResponseGet;
+}
+
+const SingleProduct: NextPage<Props> = ({ data }) => {
   const { t } = useTranslation('products');
   const { addCartValue } = useStoreUpdate();
   const { cartStorage } = useStore();
 
   const router = useRouter();
 
-  const { customId } = router.query;
+  const customId = router.query.customId ? router.query.customId as string : undefined;
 
-  const { data, isLoading } = useFetchSingleProduct(customId);
+  // const { data, isLoading } = useFetchSingleProduct(customId);
 
-  const addProductToCart = (quantity) => addCartValue(data.product, quantity);
+  const addProductToCart = (quantity: number) => addCartValue(data?.product, quantity);
   const inCart =
     cartStorage?.length > 0
-      ? cartStorage?.some((item) => item.product.customID === product.customID)
+      ? cartStorage?.some((item) => item.product.customID === data?.product.customID)
         ? true
         : false
       : false;
 
-  if (isLoading) {
-    return <Loader loading={isLoading} />;
-  }
-
   return (
     <Box
       sx={{
@@ -51,12 +52,12 @@ const SingleProduct: NextPage = () => {
           fontSize="32px"
           sx={{ mt: 25, height: '100%', color: 'primary.main' }}
         >
-          {data.product.name}
+          {data?.product.name}
         </Typography>
         <Grid container spacing={2}>
           <Grid sx={{ display: 'flex' }} item md={6} sm={12}>
             <Image
-              src={data.product.image}
+              src={data?.product.image}
               alt="product"
               width={900}
               height={700}
@@ -82,7 +83,7 @@ const SingleProduct: NextPage = () => {
           {t('products:similar')}
         </Typography>
         <Grid container spacing={2}>
-          {data.similarProducts.map((product) => (
+          {data?.similarProducts.map((product) => (
             <GridItem key={product._id}>
               <ProductCard product={product} />
             </GridItem>
@@ -97,15 +98,22 @@ export const getServerSideProps = async (context: any) => {
   const { params } = context;
   const { customId } = params;
 
+  console.log(customId);
+
   const queryClient = new QueryClient();
 
-  await queryClient.prefetchQuery(
+  const data = await queryClient.fetchQuery(
+    ['product', customId],
+    async () => await getProductData(customId)
+  );
+  await queryClient.fetchQuery(
     ['product', customId],
     async () => await getProductData(customId)
   );
 
   return {
     props: {
+      data: data,
       dehydratatedState: dehydrate(queryClient),
       ...(await serverSideTranslations(context.locale, ['products'])),
     },

utils/interface/productInterface.ts

@@ -42,7 +42,7 @@ export interface ProductsResponsePost {
   product: ProductData;
 }
 
-interface SingleProductResponseGet {
+export interface SingleProductResponseGet {
   message: string;
   product: ProductDataDB;
   similarProducts: Array<ProductDataDB>;
@@ -58,5 +58,5 @@ export type ProductsResponse =
   | ProductsResponseError;
 
 export type FeaturedProductsResponse =
-  | FeaturedProductsResponseGet
+   FeaturedProductsResponseGet
   | ProductsResponseError;