Add iCalendar export functionality

package.json

@@ -13,6 +13,7 @@
   "dependencies": {
     "@prisma/client": "5.22.0",
     "html-to-slack": "0.3.5",
+    "iamcal": "^2.1.2",
     "jest": "^29.7.0",
     "marked": "^14.1.3",
     "marked-base-url": "^1.1.5",

src/app/api/events/ical/route.ts

@@ -0,0 +1,27 @@
+import EventService from '@/services/eventService';
+import { NextRequest, NextResponse } from 'next/server';
+import { Calendar, CalendarEvent, dump, parseCalendar } from 'iamcal';
+
+export const dynamic = 'force-dynamic';
+
+export async function GET(_request: NextRequest, _ctx: { params?: unknown }) {
+  const events = await EventService.getAll();
+  const calendar = new Calendar('cthit');
+
+  for (const event of events) {
+    calendar.addComponent(
+      new CalendarEvent(event.id.toString(), event.startTime, event.startTime)
+        .setEnd(event.endTime)
+        .setSummary(event.titleSv)
+    );
+  }
+  const ical = calendar.serialize();
+
+  return new NextResponse(ical, {
+    status: 200,
+    headers: {
+      'Content-Type': 'text/calendar; charset=utf-8',
+      'Content-Disposition': 'attachment; filename="events.ics"'
+    }
+  });
+}