creating service and filtering products

src/api/middlewares.ts

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+import type {
+  MiddlewaresConfig,
+  MedusaRequest,
+  MedusaResponse,
+  MedusaNextFunction,
+} from "@medusajs/medusa";
+
+import { getProductFilters } from "./store/custom/getProductFilters";
+import { getProductsList } from "./store/custom/getProducts";
+
+async function logger(
+  req: MedusaRequest,
+  res: MedusaResponse,
+  next: MedusaNextFunction
+) {
+  next();
+}
+
+export const config: MiddlewaresConfig = {
+  routes: [
+    {
+      matcher: "/store/custom",
+      method: "GET",
+      middlewares: [logger],
+    },
+    {
+      matcher: "/store/getProductFilters",
+      method: "GET",
+      middlewares: [getProductFilters],
+    },
+    {
+      matcher: "/store/getProducts",
+      method: "GET",
+      middlewares: [getProductsList],
+    },
+  ],
+};

src/api/store/custom/getProductFilters.ts

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+import { MedusaRequest, MedusaResponse } from "@medusajs/medusa";
+
+export async function getProductFilters(
+  req: MedusaRequest,
+  res: MedusaResponse
+): Promise<void> {
+  try {
+    const filterList = {
+      colors: ["red", "blue", "green", "yellow", "purple"],
+      styles: ["HEM", "MATTER", "RIMA", "BASAL", "ART"],
+      rooms: ["Foyer/EntranceHall", "KitchenRoom", "FamilyRoom", "DiningRoom", "LivingRoom", "MasterBedroom", "Bathroom", "Laundry Room", "Guest Room", "Home Office", "Library"]
+    };
+    res.status(200).json({ filterList });
+  } catch (error) {
+    console.log(error)
+    res
+      .status(500)
+      .json({ error: "An error occurred while fetching products filter." });
+  }
+}

src/api/store/custom/getProducts.ts

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+import { MedusaRequest, MedusaResponse } from "@medusajs/medusa";
+
+export async function getProductsList(
+    req: MedusaRequest,
+    res: MedusaResponse
+): Promise<void> {
+    const productService = req.scope.resolve("productService");
+    const { colors, styles, rooms} = req.query;
+
+    const colorsArray = typeof colors === 'string' ? colors.split(',').map((color: string) => color.trim().toLowerCase()) : Array.isArray(colors) ? colors : [];
+    const stylesArray = typeof styles === 'string' ? styles.split(',').map((style: string) => style.trim().toLowerCase()) : Array.isArray(styles) ? styles : [];
+    const roomsArray = typeof rooms === 'string' ? rooms.split(',').map((room: string) => room.trim().toLowerCase()) : Array.isArray(rooms) ? rooms : [];
+
+    try {
+        let products = await productService.list({}, { relations: ["variants"] });
+        if (colorsArray.length > 0 || stylesArray.length > 0 || roomsArray.length > 0) {
+            products = products.filter((product: any) => {
+                const variantTitles = product.variants.map((variant: any) => variant.title.toLowerCase());
+                let hasValidColor = colorsArray.length === 0;
+                let hasValidStyle = stylesArray.length === 0;
+                let hasValidRoom = roomsArray.length === 0;
+                if (colorsArray.length > 0) hasValidColor = colorsArray.some((color: any) => variantTitles.includes(color));
+                if (stylesArray.length > 0) hasValidStyle = stylesArray.some((style: any) => variantTitles.includes(style));
+                if (roomsArray.length > 0) hasValidRoom = roomsArray.some((room: any) => variantTitles.includes(room));
+
+                return hasValidColor && hasValidStyle && hasValidRoom;
+            });
+        }
+        res.status(200).json({ products });
+    } catch (error) {
+        console.log(error);
+        res.status(500).json({ error: "An error occurred while fetching products." });
+    }
+}