API Development

apps/server/src/
├── routers/           # API routers
│   ├── index.ts       # Main router
│   └── user.ts        # User-related procedures
├── handlers/          # Business logic
└── middlewares/       # Authentication, logging, etc.

// apps/server/src/routers/post.ts
import { publicProcedure, protectedProcedure, router } from "../lib/orpc";
import { z } from "zod";

export const postRouter = router({
	// Public procedure
	list: publicProcedure
		.input(
			z.object({
				page: z.number().default(1),
				limit: z.number().default(10),
			}),
		)
		.query(async ({ input, ctx }) => {
			return ctx.db.select().from(posts).limit(input.limit);
		}),

	// Protected procedure (requires auth)
	create: protectedProcedure
		.input(
			z.object({
				title: z.string().min(1),
				content: z.string(),
			}),
		)
		.mutation(async ({ input, ctx }) => {
			return ctx.db.insert(posts).values({
				...input,
				authorId: ctx.user.id,
			});
		}),
});

// apps/server/src/routers/index.ts
import { postRouter } from "./post";

export const appRouter = router({
	post: postRouter,
	// ... other routers
});

export type AppRouter = typeof appRouter;

// apps/web/src/lib/api.ts
import { createORPCClient } from "@orpc/client";
import type { AppRouter } from "@server/routers";

export const api = createORPCClient<AppRouter>({
	baseURL: import.meta.env.VITE_SERVER_URL,
});

// Using React Query
const { data, isLoading } = api.post.list.useQuery({
	page: 1,
	limit: 10,
});

const createPost = api.post.create.useMutation({
	onSuccess: () => {
		queryClient.invalidateQueries(["post", "list"]);
	},
});

await createPost.mutateAsync({
	title: "Hello World",
	content: "My first post",
});

const authMiddleware = middleware(async ({ ctx, next }) => {
	const session = await getSession(ctx.request);
	if (!session) {
		throw new ORPCError("UNAUTHORIZED");
	}
	return next({ ctx: { ...ctx, user: session.user } });
});

export const protectedProcedure = publicProcedure.use(authMiddleware);

import { ORPCError } from "@orpc/server";

throw new ORPCError("NOT_FOUND", { message: "Post not found" });
throw new ORPCError("FORBIDDEN", { message: "Access denied" });
throw new ORPCError("BAD_REQUEST", { message: "Invalid input" });