Calendar: Add ctftime event id and default for empty pad domain

Author: Minei3oat

api/src/routes/ical.ts

@@ -54,8 +54,9 @@ export function icalRoute(pool: Pool): Handler {
     const ctfs = await getCtfs();
 
     for (const ctf of ctfs) {
+      const ctftime_id = ctf.ctftime_url?.replace(/\/$/, "").split("/").at(-1);
       cal.createEvent({
-        id: `${ctf.id}@${config.pad.domain}`,
+        id: `${ctf.id}:${ctftime_id || "no-ctftime"}@${config.pad.domain ||  "ctfnote"}`,
         start: ctf.start_time,
         end: ctf.end_time,
         description: ctf.description,