Rename patterns/iron-session.md to docs/patterns/iron-session.md

docs/patterns/iron-session.md

@@ -0,0 +1,34 @@
+# Patroon: iron-session
+
+## lib/session.ts
+
+```ts
+import { SessionOptions } from 'iron-session'
+
+export interface SessionData {
+  userId: string
+  isDemo: boolean
+}
+
+export const sessionOptions: SessionOptions = {
+  password: process.env.SESSION_SECRET!,
+  cookieName: 'scrum4me-session',
+  cookieOptions: {
+    secure: process.env.NODE_ENV === 'production',
+    httpOnly: true,
+    sameSite: 'lax',
+  },
+}
+```
+
+## Gebruik in Server Action of Route Handler
+
+```ts
+import { getIronSession } from 'iron-session'
+import { cookies } from 'next/headers'
+import { SessionData, sessionOptions } from '@/lib/session'
+
+const session = await getIronSession<SessionData>(await cookies(), sessionOptions)
+if (!session.userId) redirect('/login')
+if (session.isDemo) return { error: 'Niet beschikbaar in demo-modus' }
+```