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import { NextRequest } from "next/server";
import {
createContextFromRequest,
createTrcpClientFromCtx,
} from "@/server/api/client";
import { TRPCError } from "@trpc/server";
import { z, ZodError } from "zod";
import { Context } from "@hoarder/trpc";
function trpcCodeToHttpCode(code: TRPCError["code"]) {
switch (code) {
case "BAD_REQUEST":
case "PARSE_ERROR":
return 400;
case "UNAUTHORIZED":
return 401;
case "FORBIDDEN":
return 403;
case "NOT_FOUND":
return 404;
case "METHOD_NOT_SUPPORTED":
return 405;
case "TIMEOUT":
return 408;
case "PAYLOAD_TOO_LARGE":
return 413;
case "INTERNAL_SERVER_ERROR":
return 500;
default:
return 500;
}
}
interface ErrorMessage {
path: (string | number)[];
message: string;
}
function formatZodError(error: ZodError): string {
if (!error.issues) {
return error.message || "An unknown error occurred";
}
const errors: ErrorMessage[] = error.issues.map((issue) => ({
path: issue.path,
message: issue.message,
}));
const formattedErrors = errors.map((err) => {
const path = err.path.join(".");
return path ? `${path}: ${err.message}` : err.message;
});
return `${formattedErrors.join(", ")}`;
}
export interface TrpcAPIRequest<SearchParamsT, BodyType> {
ctx: Context;
api: ReturnType<typeof createTrcpClientFromCtx>;
searchParams: SearchParamsT extends z.ZodTypeAny
? z.infer<SearchParamsT>
: undefined;
body: BodyType extends z.ZodTypeAny
? z.infer<BodyType> | undefined
: undefined;
}
type SchemaType<T> = T extends z.ZodTypeAny
? z.infer<T> | undefined
: undefined;
export async function buildHandler<
SearchParamsT extends z.ZodTypeAny | undefined,
BodyT extends z.ZodTypeAny | undefined,
InputT extends TrpcAPIRequest<SearchParamsT, BodyT>,
>({
req,
handler,
searchParamsSchema,
bodySchema,
}: {
req: NextRequest;
handler: (req: InputT) => Promise<{ status: number; resp?: object }>;
searchParamsSchema?: SearchParamsT | undefined;
bodySchema?: BodyT | undefined;
}) {
try {
const ctx = await createContextFromRequest(req);
const api = createTrcpClientFromCtx(ctx);
let searchParams: SchemaType<SearchParamsT> | undefined = undefined;
if (searchParamsSchema !== undefined) {
searchParams = searchParamsSchema.parse(
Object.fromEntries(req.nextUrl.searchParams.entries()),
) as SchemaType<SearchParamsT>;
}
let body: SchemaType<BodyT> | undefined = undefined;
if (bodySchema) {
if (req.headers.get("Content-Type") !== "application/json") {
throw new TRPCError({
code: "BAD_REQUEST",
message: "Content-Type must be application/json",
});
}
let bodyJson = undefined;
try {
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
bodyJson = await req.json();
} catch (e) {
throw new TRPCError({
code: "BAD_REQUEST",
message: `Invalid JSON: ${(e as Error).message}`,
});
}
body = bodySchema.parse(bodyJson) as SchemaType<BodyT>;
}
const { status, resp } = await handler({
ctx,
api,
searchParams,
body,
} as InputT);
return new Response(resp ? JSON.stringify(resp) : null, {
status,
headers: {
"Content-Type": "application/json",
},
});
} catch (e) {
if (e instanceof ZodError) {
return new Response(
JSON.stringify({ code: "ParseError", message: formatZodError(e) }),
{
status: 400,
headers: {
"Content-Type": "application/json",
},
},
);
}
if (e instanceof TRPCError) {
let message = e.message;
if (e.cause instanceof ZodError) {
message = formatZodError(e.cause);
}
return new Response(JSON.stringify({ code: e.code, error: message }), {
status: trpcCodeToHttpCode(e.code),
headers: {
"Content-Type": "application/json",
},
});
} else {
const error = e as Error;
console.error(
`Unexpected error in: ${req.method} ${req.nextUrl.pathname}:\n${error.stack}`,
);
return new Response(JSON.stringify({ code: "UnknownError" }), {
status: 500,
headers: {
"Content-Type": "application/json",
},
});
}
}
}
|
