MSW request middleware error helper

msw.middleware.ts

import { HttpResponse, JsonBodyType } from "msw";

export const errors = {
	resourceNotFound: (
		body: JsonBodyType = { error: { message: "Resource not found" } }
	) => HttpResponse.json(body, { status: 404 }),
	unauthorized: (
		body: JsonBodyType = {
			error: {
				message: "Not authorized to access resource"
			}
		}
	) =>
		HttpResponse.json(body, {
			status: 403
		}),
	internalServerError: (
		body: JsonBodyType = {
			error: {
				message: "Internal server error"
			}
		}
	) =>
		HttpResponse.json(body, {
			status: 500
		}),
	badRequest: (
		body: JsonBodyType = {
			error: {
				message: "Bad request"
			}
		}
	) =>
		HttpResponse.json(body, {
			status: 400
		})
};

export async function middleware(request: Request) {
	if (!request.headers.has("cookie") || !sessionStorage.getItem("isAuthenticated")) {
		throw errors.unauthorized();
	}

	if (request.method === "GET") {
		// check if resource available
		// throw errors.resourceNotFound();
	}

	if (request.method === "POST") {
		// check if request body is valid
		// throw errors.badRequest();
	}

	if (request.method === "PUT") {
		// check if resource exists
		// throw errors.resourceNotFound();
		// check if request body is valid
		// throw errors.badRequest();
	}

	if (request.method === "DELETE") {
		// check if resource exists
		// throw errors.resourceNotFound();
	}

	return request;
}