chore: import upstream snapshot with attribution

apps/webapp/app/services/onboardingSession.server.ts

@@ -0,0 +1,49 @@
+import type { Session } from "@remix-run/node";
+import { createCookieSessionStorage } from "@remix-run/node";
+import { env } from "~/env.server";
+
+export const onboardingSessionStorage = createCookieSessionStorage({
+  cookie: {
+    name: "__onboarding", // use any name you want here
+    sameSite: "lax", // this helps with CSRF
+    path: "/", // remember to add this so the cookie will work in all routes
+    httpOnly: true, // for security reasons, make this cookie http only
+    secrets: [env.SESSION_SECRET],
+    secure: env.NODE_ENV === "production", // enable this in prod only
+    maxAge: 60 * 60 * 24, // 1 day
+  },
+});
+
+export function getOnboardingSession(request: Request) {
+  return onboardingSessionStorage.getSession(request.headers.get("Cookie"));
+}
+
+export function commitOnboardingSession(session: Session) {
+  return onboardingSessionStorage.commitSession(session);
+}
+
+export async function getWorkflowDate(request: Request) {
+  const session = await getOnboardingSession(request);
+
+  const rawWorkflowDate = session.get("workflowDate");
+
+  if (rawWorkflowDate) {
+    return new Date(rawWorkflowDate);
+  }
+}
+
+export async function setWorkflowDate(date: Date, request: Request) {
+  const session = await getOnboardingSession(request);
+
+  session.set("workflowDate", date.toISOString());
+
+  return session;
+}
+
+export async function clearWorkflowDate(request: Request) {
+  const session = await getOnboardingSession(request);
+
+  session.unset("workflowDate");
+
+  return session;
+}