server.ts

import {
  createRequestHandler as createRemixRequestHandler,
  type AppLoadContext,
  type ServerBuild,
} from '@remix-run/server-runtime';

export function createRequestHandler<Context = unknown>({
  build,
  mode,
  poweredByHeader = true,
  getLoadContext,
}: {
  build: ServerBuild;
  mode?: string;
  poweredByHeader?: boolean;
  getLoadContext?: (request: Request) => Promise<Context> | Context;
}) {
  const handleRequest = createRemixRequestHandler(build, mode);

  return async (request: Request) => {
    const response = await handleRequest(
      request,
      (await getLoadContext?.(request)) as AppLoadContext,
    );

    if (poweredByHeader) {
      response.headers.append('powered-by', 'Shopify, Hydrogen');
    }

    return response;
  };
}

export function getBuyerIp(request: Request) {
  return request.headers.get('oxygen-buyer-ip') ?? undefined;
}

type StorefrontHeaders = {
  requestGroupId: string | null;
  buyerIp: string | null;
  cookie: string | null;
};

export function getStorefrontHeaders(request: Request): StorefrontHeaders {
  const headers = request.headers;
  return {
    requestGroupId: headers.get('request-id'),
    buyerIp: headers.get('oxygen-buyer-ip'),
    cookie: headers.get('cookie'),
  };
}