feat(portal): add utility to manage session data

Author: HasithDeAlwis

apps/portal/app/sessions.ts

@@ -0,0 +1,31 @@
+import process from 'node:process'
+import { createCookieSessionStorage } from '@remix-run/node'
+
+const sessionSecret = process.env.SESSION_SECRET
+if (!sessionSecret) {
+  throw new Error('SESSION_SECRET must be set')
+}
+
+interface SessionData {
+  userId: string
+}
+
+interface SessionFlashData {
+  error: string
+}
+
+const { getSession, commitSession, destroySession }
+  = createCookieSessionStorage<SessionData, SessionFlashData>(
+    {
+      cookie: {
+        name: '__session',
+        secure: process.env.NODE_ENV === 'production',
+        secrets: [sessionSecret],
+        sameSite: 'lax',
+        path: '/',
+        httpOnly: true,
+      },
+    },
+  )
+
+export { commitSession, destroySession, getSession }