itpdp/api/src/routes/quiz.ts

import { DBOS } from "@dbos-inc/dbos-sdk";
import { eq } from "drizzle-orm";
import Elysia, { t } from "elysia";
import { betterAuthElysia } from "../auth";
import { db } from "../db";
import { party } from "../db/schema";
import { getMemberRecord, getPartyStatus } from "../party-data";
import type { QuizState } from "../party-types";
import { QuizWorkflow, quizQueue } from "../workflows/quiz";
import { pubsub } from "./party-socket";

function broadcastStatusToMembers(
	status: Awaited<ReturnType<typeof getPartyStatus>>,
) {
	if (!status) return;
	const payload = JSON.stringify({
		type: "party_status",
		party: status.party,
		members: status.members,
	});
	pubsub.publish(`party:${status.party.id}`, payload);
	for (const member of status.members) {
		pubsub.publish(`user:${member.userId}`, payload);
	}
}

const quizWf = new QuizWorkflow();

export const quizRoutes = new Elysia()
	.use(betterAuthElysia)
	.group("/party/:partyId/quiz", (app) =>
		app
			.post(
				"/start",
				async ({ user, set, params }) => {
					const membership = await getMemberRecord(db, user.id);
					if (!membership || membership.partyId !== params.partyId) {
						set.status = 403;
						return { error: "Not a member of this party" };
					}

					const existingQuiz = await db
						.select({ status: party.status })
						.from(party)
						.where(eq(party.id, params.partyId))
						.limit(1)
						.then((rows) => rows[0]);

					if (existingQuiz?.status === "started") {
						set.status = 409;
						return { error: "Quiz already running" };
					}

					const handle = await DBOS.startWorkflow(quizWf.startQuiz, {
						queueName: quizQueue.name,
						enqueueOptions: { queuePartitionKey: params.partyId },
					})(params.partyId);

					await db
						.update(party)
						.set({
							status: "started",
							data: null,
							lastUpdated: new Date(),
						})
						.where(eq(party.id, params.partyId));

					const status = await getPartyStatus(params.partyId);
					broadcastStatusToMembers(status);

					return {
						message: "Quiz started",
						workflowId: handle.workflowID,
					};
				},
				{ auth: true },
			)
			.post(
				"/restart",
				async ({ user, set, params }) => {
					const membership = await getMemberRecord(db, user.id);
					if (!membership || membership.partyId !== params.partyId) {
						set.status = 403;
						return { error: "Not a member of this party" };
					}

					const currentParty = await db.query.party.findFirst({
						where: {
							id: params.partyId,
						},
					});
					if (!currentParty) {
						set.status = 404;
						return { error: "Party not found" };
					}

					const quizData = currentParty.data as QuizState | null;
					if (!quizData || quizData.status !== "results") {
						set.status = 409;
						return { error: "Quiz is not finished yet" };
					}

					await db
						.update(party)
						.set({
							status: "started",
							data: null,
							lastUpdated: new Date(),
						})
						.where(eq(party.id, params.partyId));

					const handle = await DBOS.startWorkflow(quizWf.restartQuiz, {
						queueName: quizQueue.name,
						enqueueOptions: { queuePartitionKey: params.partyId },
					})(params.partyId);

					const status = await getPartyStatus(params.partyId);
					broadcastStatusToMembers(status);

					return {
						message: "Quiz restarted",
						workflowId: handle.workflowID,
					};
				},
				{ auth: true },
			)
			.post(
				"/response",
				async ({ user, body, params, set }) => {
					const party = await db.query.party.findFirst({
						where: {
							id: params.partyId,
						},
					});

					if (!party) {
						set.status = 404;
						return { error: "Party not found" };
					}
					const quizData = party.data as QuizState | null;

					if (!quizData || quizData.status !== "running") {
						set.status = 400;
						return { error: "Quiz not running" };
					}

					if (!quizData.workflowId) {
						set.status = 500;
						return { error: "Workflow ID not found" };
					}

					await DBOS.send(
						quizData.workflowId,
						{ playerId: user.id, selected: body.selected },
						"quiz_responses",
					);

					return { message: "Response recorded" };
				},
				{
					auth: true,
					body: t.Object({
						selected: t.Integer(),
					}),
				},
			),
	);