feat(app): add static rendering to single question

apps/api/.env-example

@@ -8,4 +8,7 @@ COOKIE_PASSWORD=blablablblablablblablablblablabl
 GITHUB_CLIENT_ID=
 GITHUB_CLIENT_SECRET=
 
+APP_URL=http://app.devfaq.localhost:3000
+REVALIDATION_TOKEN=
+
 DATABASE_URL=postgres://postgres:api2022@localhost:54421/database_development

apps/api/config/config.ts

@@ -3,6 +3,8 @@ export function getConfig(name: "NODE_ENV"): "production" | "development";
 export function getConfig(name: "ENV"): "production" | "staging" | "development" | "test";
 export function getConfig(name: "GITHUB_CLIENT_ID"): string;
 export function getConfig(name: "GITHUB_CLIENT_SECRET"): string;
+export function getConfig(name: "APP_URL"): string;
+export function getConfig(name: "REVALIDATION_TOKEN"): string;
 export function getConfig(name: "GIT_BRANCH"): string;
 export function getConfig(name: "GIT_COMMIT_HASH"): string;
 export function getConfig(name: "VERSION"): string;
@@ -21,6 +23,10 @@ export function getConfig(name: string): string | number {
 		case "GITHUB_CLIENT_ID":
 		case "GITHUB_CLIENT_SECRET":
 			return val || "";
+		case "APP_URL":
+			return val || "";
+		case "REVALIDATION_TOKEN":
+			return val || "";
 		case "GIT_BRANCH":
 			return val || "(unknown_branch)";
 		case "GIT_COMMIT_HASH":

apps/api/modules/answers/answers.routes.ts

@@ -1,6 +1,7 @@
 import { TypeBoxTypeProvider } from "@fastify/type-provider-typebox";
 import { Prisma } from "@prisma/client";
 import { FastifyPluginAsync, preHandlerAsyncHookHandler, preHandlerHookHandler } from "fastify";
+import { revalidate } from "../../services/revalidation.service.js";
 import { PrismaErrorCode } from "../db/prismaErrors.js";
 import { isPrismaError } from "../db/prismaErrors.util.js";
 import { dbAnswerToDto } from "./answers.mapper.js";
@@ -15,6 +16,7 @@ import {
 export const answerSelect = (userId: number) => {
 	return {
 		id: true,
+		questionId: true,
 		content: true,
 		sources: true,
 		createdAt: true,
@@ -34,6 +36,8 @@ export const answerSelect = (userId: number) => {
 	} satisfies Prisma.QuestionAnswerSelect;
 };
 
+const revalidateQuestion = (id: number) => revalidate(`/questions/p/${id}`);
+
 const answersPlugin: FastifyPluginAsync = async (fastify) => {
 	const checkAnswerUserHook: preHandlerAsyncHookHandler = async (request) => {
 		const {
@@ -101,6 +105,8 @@ const answersPlugin: FastifyPluginAsync = async (fastify) => {
 					select: answerSelect(request.session.data?._user.id || 0),
 				});
 
+				await revalidateQuestion(id);
+
 				return { data: dbAnswerToDto(answer) };
 			} catch (err) {
 				if (isPrismaError(err) && err.code === PrismaErrorCode.UniqueKeyViolation) {
@@ -132,6 +138,8 @@ const answersPlugin: FastifyPluginAsync = async (fastify) => {
 				select: answerSelect(request.session.data?._user.id || 0),
 			});
 
+			await revalidateQuestion(answer.questionId);
+
 			return { data: dbAnswerToDto(answer) };
 		},
 	});
@@ -146,10 +154,12 @@ const answersPlugin: FastifyPluginAsync = async (fastify) => {
 				params: { id },
 			} = request;
 
-			await fastify.db.questionAnswer.delete({
+			const { questionId } = await fastify.db.questionAnswer.delete({
 				where: { id },
 			});
 
+			await revalidateQuestion(questionId);
+
 			return reply.status(204).send();
 		},
 	});

apps/api/services/revalidation.service.ts

@@ -0,0 +1,9 @@
+import { getConfig } from "../config/config.js";
+
+export const revalidate = (path: string) =>
+	fetch(
+		`${getConfig("APP_URL")}/api/revalidation?token=${getConfig(
+			"REVALIDATION_TOKEN",
+		)}&path=${path}`,
+		{ method: "POST" },
+	);

apps/api/typings/undici/index.d.ts

@@ -0,0 +1,9 @@
+/* eslint-disable import/export */
+// https://github.com/DefinitelyTyped/DefinitelyTyped/issues/60924#issuecomment-1358837996
+
+declare global {
+	export const { fetch, FormData, Headers, Request, Response }: typeof import("undici");
+	export type { FormData, Headers, Request, RequestInit, Response } from "undici";
+}
+
+export {};

apps/app/.env.local-example

@@ -1,4 +1,5 @@
 NEXT_PUBLIC_API_URL=http://api.devfaq.localhost:3002
 NEXT_PUBLIC_APP_URL=http://app.devfaq.localhost:3000
 
+REVALIDATION_TOKEN=
 FLAGSMITH_SERVER_SIDE_ENVIRONMENT_KEY=

apps/app/src/app/(main-layout)/questions/p/[questionId]/page.tsx

@@ -42,3 +42,7 @@ export default async function SingleQuestionPage({ params }: { params: Params<"q
 		</>
 	);
 }
+
+export async function generateStaticParams() {
+	return [];
+}

apps/app/src/lib/revalidation.ts

@@ -0,0 +1,3 @@
+export const validatePath = (path: string | string[] | undefined): path is string => {
+	return Boolean(path) && typeof path === "string";
+};

apps/app/src/pages/api/revalidation.ts

@@ -0,0 +1,21 @@
+import type { NextApiRequest, NextApiResponse } from "next";
+import { validatePath } from "../../lib/revalidation";
+
+export default async function handler(req: NextApiRequest, res: NextApiResponse) {
+	const { token, path } = req.query;
+
+	if (token !== process.env.REVALIDATION_TOKEN) {
+		return res.status(401).json({ message: "Invalid token" });
+	}
+
+	if (!validatePath(path)) {
+		return res.status(400).json({ message: "Incorrect path format" });
+	}
+
+	try {
+		await res.revalidate(path);
+		return res.status(204).end();
+	} catch (err) {
+		return res.status(500).json({ message: "Error revalidating" });
+	}
+}