apps/web/src/server/trpc/trpc.ts

import { initTRPC, TRPCError } from '@trpc/server';
import superjson from 'superjson';

import type { TRPCContext } from './context';

const t = initTRPC.context<TRPCContext>().create({
  transformer: superjson,
});

const requireUser = t.middleware(({ ctx, next }) => {
  if (!ctx.session?.user) {
    throw new TRPCError({ code: 'UNAUTHORIZED' });
  }

  return next({
    ctx: {
      ...ctx,
      user: ctx.session.user,
    },
  });
});

const requireAdmin = t.middleware(({ ctx, next }) => {
  const user = ctx.session?.user;

  if (user?.role !== 'ADMIN') {
    throw new TRPCError({ code: 'FORBIDDEN' });
  }

  return next({
    ctx: {
      ...ctx,
      user,
    },
  });
});

const requireMuhasebe = t.middleware(({ ctx, next }) => {
  const user = ctx.session?.user;
  const role = user?.role;

  if (role !== 'ADMIN' && role !== 'MUHASEBE') {
    throw new TRPCError({ code: 'FORBIDDEN' });
  }

  return next({
    ctx: {
      ...ctx,
      user,
    },
  });
});

export const createTRPCRouter = t.router;
export const publicProcedure = t.procedure;
export const protectedProcedure = t.procedure.use(requireUser);
export const adminProcedure = t.procedure.use(requireAdmin);
export const muhasebeProcedure = t.procedure.use(requireMuhasebe);